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cristy	3eaa0ef	2010-03-06 20:35:26 +0000	[diff] [blame]	1
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cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	5	<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
				6	"http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
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				9	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
				10	xsi:schemaLocation="http://www.w3.org/1999/xhtml
				11	http://www.w3.org/MarkUp/SCHEMA/xhtml11.xsd">
cristy	3eaa0ef	2010-03-06 20:35:26 +0000	[diff] [blame]	12	<head>
cristy	3c98a4f	2010-08-13 20:09:41 +0000	[diff] [blame]	13	<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
cristy	1efc1ab	2011-08-01 14:47:02 +0000	[diff] [blame]	14	<meta name="google-site-verification" content="MxsMq6bdLOx0KSuz1MY6yG9ZTIJ7_7DVRfl5NCAT5Yg"/>
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	15	<title>ImageMagick: Command-line Options</title>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	16	<meta http-equiv="Content-Language" content="en-US"/>
				17	<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
				18	<meta http-equiv="Reply-to" content="magick-users@imagemagick.org"/>
cristy	3c98a4f	2010-08-13 20:09:41 +0000	[diff] [blame]	19	<meta name="Application-name" content="ImageMagick"/>
cristy	e6e8415	2011-06-06 14:16:49 +0000	[diff] [blame]	20	<meta name="Description" content="Use ImageMagick to convert, edit, or compose bitmap images in a variety of formats. In addition resize, rotate, shear, distort and transform images automagically."/>
cristy	3c98a4f	2010-08-13 20:09:41 +0000	[diff] [blame]	21	<meta name="Application-url" content="http://www.imagemagick.org"/>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	22	<meta name="Generator" content="PHP"/>
cristy	e6e8415	2011-06-06 14:16:49 +0000	[diff] [blame]	23	<meta name="Keywords" content="command-line, options, ImageMagick, ImageMagic, MagickCore, MagickWand, PerlMagick, Magick++, RMagick, PythonMagick, JMagick, TclMagick, Image, Magick, Magic, Wand, ImageMagickObject, Image, Processing, Automagically"/>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	24	<meta name="Rating" content="GENERAL"/>
				25	<meta name="Robots" content="INDEX, FOLLOW"/>
				26	<meta name="Generator" content="ImageMagick Studio LLC"/>
				27	<meta name="Author" content="ImageMagick Studio LLC"/>
				28	<meta name="Revisit-after" content="2 DAYS"/>
				29	<meta name="Resource-type" content="document"/>
cristy	1454be7	2011-12-19 01:52:48 +0000	[diff] [blame]	30	<meta name="Copyright" content="Copyright (c) 1999-2012 ImageMagick Studio LLC"/>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	31	<meta name="Distribution" content="Global"/>
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	32	<link rel="icon" href="../images/wand.png"/>
cristy	3c98a4f	2010-08-13 20:09:41 +0000	[diff] [blame]	33	<link rel="shortcut icon" href="../images/wand.ico" type="images/x-icon"/>
cristy	29c5c99	2011-06-25 13:58:49 +0000	[diff] [blame]	34	<link rel="canonical" href="http://www.imagemagick.org" />
cristy	3c98a4f	2010-08-13 20:09:41 +0000	[diff] [blame]	35	<link rel="meta" type="application/rdf+xml" title="ICI" href="http://imagemagick.org/ici.rdf"/>
cristy	7a40ba8	2011-01-08 20:31:18 +0000	[diff] [blame]	36	<link rel="stylesheet" href="http://www.google.com/cse/style/look/default.css" type="text/css" />
cristy	1efc1ab	2011-08-01 14:47:02 +0000	[diff] [blame]	37	<link rel="stylesheet" type="text/css" href="http://www.imagemagick.org/fancybox/jquery.fancybox-1.3.4.css" media="screen" />
cristy	3c98a4f	2010-08-13 20:09:41 +0000	[diff] [blame]	38	<style type="text/css" media="all">
				39	@import url("../www/magick.css");
				40	</style>
cristy	29c5c99	2011-06-25 13:58:49 +0000	[diff] [blame]	41	<script type="text/javascript" src="https://apis.google.com/js/plusone.js"></script>
cristy	1efc1ab	2011-08-01 14:47:02 +0000	[diff] [blame]	42	<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.6.1/jquery.min.js"></script>
				43	<script type="text/javascript" src="http://www.imagemagick.org/fancybox/jquery.fancybox-1.3.4.pack.js"></script>
cristy	361f466	2010-12-31 23:02:52 +0000	[diff] [blame]	44	<script type="text/javascript">
				45	$(document).ready(function() {
				46	$("a[href$=.jpg],a[href$=.png],a[href$=.gif]").fancybox({
				47	'transitionIn' : 'elastic',
				48	'transitionOut' : 'elastic',
				49	'overlayShow' : false,
				50	'opacity' : true
				51	});
				52	});
				53	</script>
cristy	3eaa0ef	2010-03-06 20:35:26 +0000	[diff] [blame]	54	</head>
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				56	<body id="www-imagemagick-org">
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cristy	b52981c	2011-03-19 17:09:31 +0000	[diff] [blame]	58	<div style="margin: 17px auto; float: left;">
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cristy	3eaa0ef	2010-03-06 20:35:26 +0000	[diff] [blame]	71	<a href="http://www.imagemagick.org/discourse-server/">
cristy	af8d665	2011-02-04 21:57:45 +0000	[diff] [blame]	72	<img src="../images/logo.jpg"
				73	alt="ImageMagick Logo"
cristy	178edaf	2011-01-23 03:42:39 +0000	[diff] [blame]	74	style="width: 123px; height: 118px; border: 0px; float: right;" /></a>
cristy	3eaa0ef	2010-03-06 20:35:26 +0000	[diff] [blame]	75	<a href="../index.html">
cristy	af8d665	2011-02-04 21:57:45 +0000	[diff] [blame]	76	<img src="../images/sprite.jpg"
				77	alt="ImageMagick Sprite"
cristy	3eaa0ef	2010-03-06 20:35:26 +0000	[diff] [blame]	78	style="width: 114px; height: 118px; border: 0px; float: right;" /></a>
				79	</div>
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cristy	3eaa0ef	2010-03-06 20:35:26 +0000	[diff] [blame]	82
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cristy	83a272e	2010-05-07 20:40:35 +0000	[diff] [blame]	84	<a title="About ImageMagick" href="../index.html">About ImageMagick</a>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	85	</div>
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				101	<div class="sep"></div>
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cristy	83a272e	2010-05-07 20:40:35 +0000	[diff] [blame]	103	<a title="Command-line Tools" href="../www/command-line-tools.html">Command-line Tools</a>
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				105	<div class="sub">
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cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	222	<h1>Create, Edit, or Compose Bitmap Images With These Command-line Options</h1>
cristy	5cadd61	2009-09-21 19:33:41 +0000	[diff] [blame]	223	<p class="navigation-index">
cristy	8b9dd95	2011-03-21 22:56:18 +0000	[diff] [blame]	224	[ <a href="../www/command-line-options.html#adaptive-blur">‑adaptive‑blur</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#adaptive-resize">‑adaptive‑resize</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#adaptive-sharpen">‑adaptive‑sharpen</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#adjoin">‑adjoin</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#affine">‑affine</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#alpha">‑alpha</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#annotate">‑annotate</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#antialias">‑antialias</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#append">‑append</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#attenuate">‑attenuate</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#authenticate">‑authenticate</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#auto-gamma">‑auto‑gamma</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#auto-level">‑auto‑level</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#auto-orient">‑auto‑orient</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#backdrop">‑backdrop</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#background">‑background</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#bench">‑bench</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#bias">‑bias</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#black-point-compensation">‑black‑point‑compensation</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#black-threshold">‑black‑threshold</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#blend">‑blend</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#blue-primary">‑blue‑primary</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#blue-shift">‑blue‑shift</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#blur">‑blur</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#border">‑border</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#bordercolor">‑bordercolor</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#borderwidth">‑borderwidth</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#brightness-contrast">‑brightness‑contrast</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#cache">‑cache</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#caption">‑caption</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#cdl">‑cdl</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#channel">‑channel</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#charcoal">‑charcoal</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#chop">‑chop</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#clamp">‑clamp</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#clip">‑clip</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#clip-mask">‑clip‑mask</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#clip-path">‑clip‑path</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#clone">‑clone</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#clut">‑clut</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#coalesce">‑coalesce</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#colorize">‑colorize</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#colormap">‑colormap</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#color-matrix">‑color‑matrix</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#colors">‑colors</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#colorspace">‑colorspace</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#combine">‑combine</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#comment">‑comment</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#compose">‑compose</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#composite">‑composite</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#compress">‑compress</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#contrast">‑contrast</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#contrast-stretch">‑contrast‑stretch</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#convolve">‑convolve</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#crop">‑crop</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#cycle">‑cycle</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#debug">‑debug</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#decipher">‑decipher</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#deconstruct">‑deconstruct</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#define">‑define</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#delay">‑delay</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#delete">‑delete</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#density">‑density</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#depth">‑depth</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#descend">‑descend</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#deskew">‑deskew</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#despeckle">‑despeckle</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#direction">‑direction</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#displace">‑displace</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#display">‑display</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#dispose">‑dispose</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#dissimilarity-threshold">‑dissimilarity‑threshold</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#dissolve">‑dissolve</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#distort">‑distort</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#dither">‑dither</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#draw">‑draw</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#duplicate">‑duplicate</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#edge">‑edge</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#emboss">‑emboss</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#encipher">‑encipher</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#encoding">‑encoding</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#endian">‑endian</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#enhance">‑enhance</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#equalize">‑equalize</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#evaluate">‑evaluate</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#evaluate-sequence">‑evaluate‑sequence</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#extent">‑extent</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#extract">‑extract</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#family">‑family</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#features">‑features</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#fft">‑fft</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#fill">‑fill</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#filter">‑filter</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#flatten">‑flatten</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#flip">‑flip</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#floodfill">‑floodfill</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#flop">‑flop</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#font">‑font</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#foreground">‑foreground</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#format">‑format</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#format_identify_">‑format[identify]</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#frame">‑frame</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#frame_import_">‑frame[import]</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#function">‑function</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#fuzz">‑fuzz</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#fx">‑fx</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#gamma">‑gamma</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#gaussian-blur">‑gaussian‑blur</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#geometry">‑geometry</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#gravity">‑gravity</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#green-primary">‑green‑primary</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#hald-clut">‑hald‑clut</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#help">‑help</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#highlight-color">‑highlight‑color</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#iconGeometry">‑iconGeometry</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#iconic">‑iconic</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#identify">‑identify</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#ift">‑ift</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#immutable">‑immutable</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#implode">‑implode</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#insert">‑insert</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#intent">‑intent</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#interlace">‑interlace</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#interpolate">‑interpolate</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#interline-spacing">‑interline‑spacing</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#interword-spacing">‑interword‑spacing</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#kerning">‑kerning</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#label">‑label</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#lat">‑lat</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#layers">‑layers</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#level">‑level</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#level-colors">‑level‑colors</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#limit">‑limit</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#linear-stretch">‑linear‑stretch</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#linewidth">‑linewidth</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#liquid-rescale">‑liquid‑rescale</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#list">‑list</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#log">‑log</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#loop">‑loop</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#lowlight-color">‑lowlight‑color</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#magnify">‑magnify</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#map">‑map</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#map_stream_">‑map[stream]</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#mask">‑mask</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#mattecolor">‑mattecolor</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#median">‑median</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#metric">‑metric</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#mode">‑mode</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#modulate">‑modulate</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#monitor">‑monitor</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#monochrome">‑monochrome</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#morph">‑morph</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#morphology">‑morphology</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#mosaic">‑mosaic</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#motion-blur">‑motion‑blur</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#name">‑name</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#negate">‑negate</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#noise">‑noise</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#normalize">‑normalize</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#opaque">‑opaque</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#ordered-dither">‑ordered‑dither</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#orient">‑orient</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#page">‑page</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#paint">‑paint</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#path">‑path</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#pause_animate_">‑pause[animate]</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#pause_import_">‑pause[import]</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#pen">‑pen</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#ping">‑ping</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#pointsize">‑pointsize</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#polaroid">‑polaroid</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#posterize">‑posterize</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#precision">‑precision</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#preview">‑preview</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#print">‑print</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#process">‑process</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#profile">‑profile</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#quality">‑quality</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#quantize">‑quantize</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#quiet">‑quiet</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#radial-blur">‑radial‑blur</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#raise">‑raise</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#random-threshold">‑random‑threshold</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#red-primary">‑red‑primary</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#regard-warnings">‑regard‑warnings</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#region">‑region</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#remap">‑remap</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#remote">‑remote</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#render">‑render</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#repage">‑repage</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#resample">‑resample</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#resize">‑resize</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#respect-parentheses">‑respect‑parentheses</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#reverse">‑reverse</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#roll">‑roll</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#rotate">‑rotate</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#sample">‑sample</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#sampling-factor">‑sampling‑factor</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#scale">‑scale</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#scene">‑scene</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#screen">‑screen</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#seed">‑seed</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#segment">‑segment</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#selective-blur">‑selective‑blur</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#separate">‑separate</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#sepia-tone">‑sepia‑tone</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#set">‑set</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#shade">‑shade</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#shadow">‑shadow</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#shared-memory">‑shared‑memory</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#sharpen">‑sharpen</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#shave">‑shave</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#shear">‑shear</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#sigmoidal-contrast">‑sigmoidal‑contrast</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#silent">‑silent</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#size">‑size</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#sketch">‑sketch</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#smush">‑smush</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#snaps">‑snaps</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#solarize">‑solarize</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#sparse-color">‑sparse‑color</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#splice">‑splice</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#spread">‑spread</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#statistic">‑statistic</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#stegano">‑stegano</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#stereo">‑stereo</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#stretch">‑stretch</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#strip">‑strip</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#stroke">‑stroke</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#strokewidth">‑strokewidth</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#style">‑style</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#subimage-search">‑subimage‑search</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#swap">‑swap</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#swirl">‑swirl</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#synchronize">‑synchronize</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#taint">‑taint</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#text-font">‑text‑font</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#texture">‑texture</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#threshold">‑threshold</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#thumbnail">‑thumbnail</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#tile">‑tile</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#tile-offset">‑tile‑offset</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#tint">‑tint</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#title">‑title</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#transform">‑transform</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#transparent">‑transparent</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#transparent-color">‑transparent‑color</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#transpose">‑transpose</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#transverse">‑transverse</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#treedepth">‑treedepth</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#trim">‑trim</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#type">‑type</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#undercolor">‑undercolor</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#unique-colors">‑unique‑colors</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#units">‑units</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#unsharp">‑unsharp</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#update">‑update</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#verbose">‑verbose</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#version">‑version</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#view">‑view</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#vignette">‑vignette</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#virtual-pixel">‑virtual‑pixel</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#visual">‑visual</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#watermark">‑watermark</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#wave">‑wave</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#weight">‑weight</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#white-point">‑white‑point</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#white-threshold">‑white‑threshold</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#window">‑window</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#window-group">‑window‑group</a> <span class='bull'> • </span> <a href="../www/command-line-options.html#write">‑write</a> ] </p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	225
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	226	<div class="doc-section">
				227
cristy	b36feb2	2010-03-26 16:54:37 +0000	[diff] [blame]	228	<p>Below is list of command-line options recognized by the ImageMagick <a
				229	href="../www/command-line-tools.html">command-line
				230	tools</a>. If you want a description of a particular option, click on the
				231	option name in the navigation bar above and you will go right to it. Unless
cristy	a890294	2010-07-30 00:49:52 +0000	[diff] [blame]	232	otherwise noted, each option is recognized by the commands <a href="../www/convert.html">convert</a>, <a href="../www/mogrify.html">mogrify</a>.</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	233
				234	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	235	<h4><a id="adaptive-blur"></a>-adaptive-blur <em class="arg">radius</em>[x<em class="arg">sigma</em>]</h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	236	</div>
				237
				238	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Adaptively blur pixels, with decreasing effect near edges.</td><td style='text-align:right;'></td></tr></table>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	239	<p>A Gaussian operator of the given radius and standard deviation (<em class="arg">sigma</em>) is used. If <em class="arg">sigma</em> is not given it defaults to 1.</p>
				240
				241	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	242	<h4><a id="adaptive-resize"></a>-adaptive-resize <em class="arg">geometry</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	243	</div>
				244
				245	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Resize the image using data-dependent triangulation.</td><td style='text-align:right;'></td></tr></table>
				246
				247	<p>See <a href="../www/command-line-processing.html#geometry">Image Geometry</a> for complete details about the <em class="arg">geometry</em> argument. The <a href="#adaptive-resize">-adaptive-resize</a> option defaults to data-dependent triangulation. Use the <a href="#filter">-filter</a> to choose a different resampling algorithm. Offsets, if present in the geometry string, are ignored, and the <a href="#gravity">-gravity</a> option has no effect.</p>
				248
				249	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	250	<h4><a id="adaptive-sharpen"></a>-adaptive-sharpen <em class="arg">radius</em>[x<em class="arg">sigma</em>]</h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	251	</div>
				252
				253	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Adaptively sharpen pixels, with increasing effect near edges.</td><td style='text-align:right;'></td></tr></table>
				254
				255	<p>A Gaussian operator of the given radius and standard deviation (<em class="arg">sigma</em>) is used. If <em class="arg">sigma</em> is not given it defaults to 1.</p>
				256
				257	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	258	<h4><a id="adjoin"></a>-adjoin</h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	259	</div>
				260
				261	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Join images into a single multi-image file.</td><td style='text-align:right;'></td></tr></table>
				262
cristy	3009279	2011-02-22 02:06:14 +0000	[diff] [blame]	263	<p>This option is enabled by default. An attempt is made to save all images of
				264	an image sequence into the given output file. However, some formats, such as
				265	JPEG and PNG, do not support more than one image per file, and in that case
				266	ImageMagick is forced to write each image as a separate file. As such, if
				267	more than one image needs to be written, the filename given is modified by
				268	adding a <a href="#scene">-scene</a> number before the suffix, in order to
				269	make distinct names for each image. </p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	270
cristy	3009279	2011-02-22 02:06:14 +0000	[diff] [blame]	271	<p>Use <a href="#adjoin">+adjoin</a> to force each image to be written to
				272	separate files, whether or not the file format allows multiple images per file
				273	(for example, GIF, MIFF, and TIFF). </p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	274
cristy	3009279	2011-02-22 02:06:14 +0000	[diff] [blame]	275	<p>Including a C-style integer format string in the output filename will
				276	automagically enable <a href="#adjoin">+adjoin</a> and are used to specify
				277	where the <a href="#scene">-scene</a> number is placed in the filenames. These
				278	strings, such as '<kbd>%d</kbd>' or '<kbd>%03d</kbd>', are familiar to those
				279	who have used the standard <kbd>printf()</kbd>' C-library function. As an
				280	example, the command</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	281
				282	<p class='crt'><span class="crtprompt"> $magick> </span><span class='crtin'>convert logo: rose: -morph 15 my%02dmorph.jpg</span></p>
cristy	3009279	2011-02-22 02:06:14 +0000	[diff] [blame]	283	<p>will create a sequence of 17 images (the two given plus 15 more created by
				284	<a href="#morph">-morph</a>), named: my00morph.jpg, my01morph.jpg,
				285	my02morph.jpg, ..., my16morph.jpg. </p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	286
cristy	3009279	2011-02-22 02:06:14 +0000	[diff] [blame]	287	<p>In summary, ImageMagick tries to write all images to one file, but will
				288	save to multiple files, if any of the following conditions exist...
				289	<ol>
				290	<li>the output image's file format does not allow multi-image files,
				291	<li>the <a href="#adjoin">+adjoin</a> option is given, or
				292	<li>a printf() integer format string (eg: "%d") is present in the output
				293	filename.
				294	</ol></p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	295
				296
				297	<div style="margin: auto;">
cristy	3009279	2011-02-22 02:06:14 +0000	[diff] [blame]	298	<h4><a id="affine"></a>-affine
				299	<em class="arg">s<sub>x</sub></em>,<em class="arg">r<sub>x</sub></em>,<em
				300	class="arg">r<sub>y</sub></em>,<em class="arg">s<sub>y</sub></em>[,<em
cristy	e9a32c3	2011-04-07 01:11:05 +0000	[diff] [blame]	301	class="arg">t<sub>x</sub></em>,<em class="arg">t<sub>y</sub></em>]</h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	302	</div>
				303
				304	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Set the drawing transformation matrix for combined rotating and scaling.</td><td style='text-align:right;'></td></tr></table>
				305
cristy	3009279	2011-02-22 02:06:14 +0000	[diff] [blame]	306	<p>This option sets a transformation matrix, for use by subsequent <a
				307	href="#draw">-draw</a> or <a href="#transform">-transform</a> options. </p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	308
cristy	3009279	2011-02-22 02:06:14 +0000	[diff] [blame]	309	<p>The matrix entries are entered as comma-separated numeric values either in
				310	quotes or without spaces. </p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	311
cristy	3009279	2011-02-22 02:06:14 +0000	[diff] [blame]	312	<p>Internally, the transformation matrix has 3x3 elements, but three of them
				313	are omitted from the input because they are constant. The new (transformed)
				314	coordinates (<em class="arg">x'</em>, <em class="arg">y'</em>) of a pixel at
				315	position (<em class="arg">x</em>, <em class="arg">y</em>) in the original
				316	image are calculated using the following matrix equation.</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	317
				318	<div class="eqn">
				319	<img alt="affine transformation" src="../images/affine.png"/>
				320	</div>
				321
cristy	3009279	2011-02-22 02:06:14 +0000	[diff] [blame]	322	<p> The size of the resulting image is that of the smallest rectangle that
				323	contains the transformed source image. The parameters <em
				324	class="arg">t<sub>x</sub></em> and <em class="arg">t<sub>y</sub></em>
				325	subsequently shift the image pixels so that those that are moved out of the
				326	image area are cut off.</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	327
cristy	3009279	2011-02-22 02:06:14 +0000	[diff] [blame]	328	<p>The transformation matrix complies with the left-handed pixel coordinate
				329	system: positive <em class="arg">x</em> and <em class="arg">y</em> directions
				330	are rightward and downward, resp.; positive rotation is clockwise.</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	331
cristy	3009279	2011-02-22 02:06:14 +0000	[diff] [blame]	332	<p> If the translation coefficients <em class="arg">t<sub>x</sub></em> and <em
				333	class="arg">t<sub>y</sub></em> are omotted they default to 0,0. Therefore,
				334	four parameters suffice for rotation and scaling without translation.</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	335
cristy	3009279	2011-02-22 02:06:14 +0000	[diff] [blame]	336	<p>Scaling by the factors <em class="arg">s<sub>x</sub></em> and <em
				337	class="arg">s<sub>y</sub></em> in the <em>x</em> and <em>y</em> directions,
				338	respectively, is accomplished with the following.</p>
				339
				340	<p>See <a href="#transform">-transform</a>, and the <a
				341	href="#distort">-distort</a> method '<kbd>Affineprojection</kbd> for more
				342	information </p>
				343
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	344
				345	<p class="crtsnip">
				346	-affine <em class="arg">s<sub>x</sub></em>,0,0,<em class="arg">s<sub>y</sub></em>
				347	</p>
				348
				349	<p>Translation by a displacement (<em class="arg">t<sub>x</sub></em>, <em class="arg">t<sub>y</sub></em>) is accomplished like so:</p>
				350
				351	<p class="crtsnip">
				352	-affine 1,0,0,1,<em class="arg">t<sub>x</sub></em>,<em class="arg">t<sub>y</sub></em>
				353	</p>
				354
				355	<p>Rotate clockwise about the origin (the upper left-hand corner) by an angle <em>a</em> by letting
				356	<em>c</em> = cos(<em>a</em>), <em>s</em> = sin(<em>a</em>), and using the following.</p>
				357
				358	<p class="crtsnip">
				359	-affine <em>c</em>,<em>s</em>,-<em>s</em>,<em>c</em>
				360	</p>
				361
				362	<p>The cumulative effect of a sequence of <a href="#affine" >-affine</a> transformations can be accomplished by instead by a single <a href="#affine" >-affine</a> operation using the matrix equal to the product of the matrices of the individual transformations.</p>
				363
				364	<p>An attempt is made to detect near-singular transformation matrices. If the matrix determinant has a sufficiently small absolute value it is rejected.</p>
				365
				366	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	367	<h4><a id="alpha"></a>-alpha <em class="arg">type</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	368	</div>
				369
				370	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Gives control of the alpha/matte channel of an image.</td><td style='text-align:right;'></td></tr></table>
				371
				372	<p>Used to set a flag on an image indicating whether or not to use existing alpha
				373	channel data, to create an alpha channel, or to perform other operations on the alpha channel. Choose the argument <em class="arg">type</em> from the list below.</p>
				374
				375
				376	<table class="doc">
				377	<tbody>
				378	<tr valign="top">
				379	<th align="left" style="width: 8%">type</th>
				380	<th align="left">Description</th>
				381	</tr>
				382
				383	<tr valign="top">
cristy	bac7a16	2010-06-15 19:57:29 +0000	[diff] [blame]	384	<td valign="top"><kbd>Activate</kbd> or <kbd>On</kbd></td>
cristy	83a272e	2010-05-07 20:40:35 +0000	[diff] [blame]	385	<td valign="top">
cristy	bac7a16	2010-06-15 19:57:29 +0000	[diff] [blame]	386	Enable the image's transparency channel. Note normally <kbd>Set</kbd>
				387	should be used instead of this, unless you specifically need to
				388	preserve existing (but specifically turned <kbd>Off</kbd>) transparency
				389	channel. </td></tr>
cristy	83a272e	2010-05-07 20:40:35 +0000	[diff] [blame]	390
				391	<tr valign="top">
cristy	bac7a16	2010-06-15 19:57:29 +0000	[diff] [blame]	392	<td valign="top"><kbd>Deactivate</kbd> or <kbd>Off</kbd></td>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	393	<td valign="top">
				394	Disables the image's transparency channel. Does not delete or change the
cristy	83a272e	2010-05-07 20:40:35 +0000	[diff] [blame]	395	existing data, just turns off the use of that data.</td></tr>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	396
				397	<tr valign="top">
				398	<td valign="top"><kbd>Set</kbd></td>
				399	<td valign="top">
cristy	bac7a16	2010-06-15 19:57:29 +0000	[diff] [blame]	400	Activates the alpha/matte channel. If it was previously turned off
				401	then it also resets the channel to opaque. If the image already had
				402	the alpha channel turned on, it will have no effect.</td></tr>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	403
				404	<tr valign="top">
				405	<td valign="top"><kbd>Opaque</kbd></td>
				406	<td valign="top">
cristy	bac7a16	2010-06-15 19:57:29 +0000	[diff] [blame]	407	Enables the alpha/matte channel and forces it to be fully opaque.
				408	</td></tr>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	409
				410	<tr valign="top">
				411	<td valign="top"><kbd>Transparent</kbd></td>
				412	<td valign="top">
cristy	83a272e	2010-05-07 20:40:35 +0000	[diff] [blame]	413	Activates the alpha/matte channel and forces it to be fully
cristy	bac7a16	2010-06-15 19:57:29 +0000	[diff] [blame]	414	transparent. This effectively creates a fully transparent image the
				415	same size as the original and with all its original RGB data still
				416	intact, but fully transparent. </td></tr>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	417
				418	<tr valign="top">
				419	<td valign="top"><kbd>Extract</kbd></td>
				420	<td valign="top">
				421	Copies the alpha channel values into all the color channels and turns
cristy	bac7a16	2010-06-15 19:57:29 +0000	[diff] [blame]	422	'<kbd>Off</kbd>' the the image's transparency, so as to generate
				423	a gray-scale mask of the image's shape. The alpha channel data is left
				424	intact just deactivated. This is the inverse of '<kbd>Copy</kbd>'.
				425	</td></tr>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	426
				427	<tr valign="top">
				428	<td valign="top"><kbd>Copy</kbd></td>
				429	<td valign="top">
				430	Turns '<kbd>On</kbd>' the alpha/matte channel, then copies the
cristy	bac7a16	2010-06-15 19:57:29 +0000	[diff] [blame]	431	gray-scale intensity of the image, into the alpha channel, converting
				432	a gray-scale mask into a transparent shaped mask ready to be colored
				433	appropriately. The color channels are not modified. </td></tr>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	434
				435	<tr valign="top">
				436	<td valign="top"><kbd>Shape</kbd></td>
				437	<td valign="top">
				438	As per '<kbd>Copy</kbd>' but also colors the resulting shape mask with
cristy	b36feb2	2010-03-26 16:54:37 +0000	[diff] [blame]	439	the current background color. That is the RGB color channels is
				440	replaced, with appropriate alpha shape.
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	441	</td></tr>
				442
				443	<tr valign="top">
				444	<td valign="top"><kbd>Background</kbd></td>
				445	<td valign="top">
cristy	b36feb2	2010-03-26 16:54:37 +0000	[diff] [blame]	446	Set any fully-transparent pixel to the background color, while leaving
				447	it fully-transparent. This can make some image file formats, such as
				448	PNG, smaller as the RGB values of transparent pixels are more uniform,
				449	and thus can compress better.
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	450	</td></tr>
				451	</tbody>
				452	</table>
				453
				454	<p>Note that while the <a href="#matte" >+matte</a> operation is the same as
cristy	bac7a16	2010-06-15 19:57:29 +0000	[diff] [blame]	455	"<kbd><a href="#alpha" >-alpha</a> Off</kbd>", the <a href="#matte"
cristy	b36feb2	2010-03-26 16:54:37 +0000	[diff] [blame]	456	>-matte</a> operation is the same as "<kbd><a href="#alpha" >-alpha</a>
cristy	bac7a16	2010-06-15 19:57:29 +0000	[diff] [blame]	457	Set</kbd>" and not "<kbd><a href="#alpha" >-alpha</a> On</kbd>". </p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	458
				459
				460	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	461	<h4><a id="annotate"></a>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	462	-annotate <em class="arg">degrees</em> <em class="arg">text</em><br />
				463	-annotate <em class="arg">Xdegrees</em>x<em class="arg">Ydegrees</em> <em class="arg">text</em><br />
				464	-annotate <em class="arg">Xdegrees</em>x<em class="arg">Ydegrees</em> {+-}<em class="arg">t<sub>x</sub></em>{+-}<em class="arg">t<sub>y</sub></em> <em class="arg">text</em></h4>
				465	</div>
				466
				467	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Annotate an image with text.</td><td style='text-align:right;'></td></tr></table>
				468
				469	<p>This is a convenience for annotating an image with text. For more precise control over text annotations, use <a href="#draw">-draw</a>.</p>
				470
				471
				472	<p>The values <em class="arg">Xdegrees</em> and <em class="arg">Ydegrees</em> control the shears with respect to the , respectively, applied to the text, while <em class="arg">t<sub>x</sub></em> and <em class="arg">t<sub>y</sub></em> are offsets that give the location of the text relative to the upper left corner of the image.</p>
				473
				474	<p>Using <a href="#annotate">-annotate</a> <em class="arg">degrees</em> or <a href="#annotate">-annotate</a> <em class="arg">degrees</em>x<em class="arg">degrees</em> produces an unsheared rotation of the text. The direction of the rotation is positive, which means a clockwise rotation if <em class="arg">degrees</em> is positive. (This conforms to the usual mathematical convention once it is realized that the positive <em>y</em>–direction is conventionally considered to be <em>downward</em> for images.)</p>
				475
				476	<p>The new (transformed) coordinates (<em class="arg">x'</em>, <em class="arg">y'</em>) of a pixel at position (<em class="arg">x</em>, <em class="arg">y</em>) in the image are calculated using the following matrix equation.</p>
				477	<div class="eqn"><img alt="annotate transformation" src="../images/annotate.png"/></div>
				478
				479	<p>If <em class="arg">t<sub>x</sub></em> and <em class="arg">t<sub>y</sub></em> are omitted, they default to 0. This makes the bottom-left of the text becomes the upper-left corner of the image, which is probably undesirable. Adding a <a href="#gravity" >-gravity</a> option in this case leads to nice results.</p>
				480
				481	<p>Text is any UTF-8 encoded character sequence. If <em class="arg">text</em> is of the form '@mytext.txt', the text is read from the file <kbd>mytext.txt</kbd>. Text in a file is taken literally; no embedded formatting characters are recognized.</p>
				482
				483	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	484	<h4><a id="antialias"></a>-antialias</h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	485	</div>
				486
				487	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Enable/Disable of the rendering of anti-aliasing pixels when
				488	drawing fonts and lines.</td><td style='text-align:right;'></td></tr></table>
				489
				490	<p>By default, objects (e.g. text, lines, polygons, etc.) are antialiased when
				491	drawn. Use <a href="#antialias">+antialias</a> to disable the addition of
				492	antialiasing edge pixels. This will then reduce the number of colors added to
				493	an image to just the colors being directly drawn. That is, no mixed colors
cristy	d0bd44a	2010-09-24 12:38:11 +0000	[diff] [blame]	494	are added when drawing such objects. </p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	495
				496	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	497	<h4><a id="append"></a>-append</h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	498	</div>
				499
				500	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Join current images vertically or horizontally.</td><td style='text-align:right;'></td></tr></table>
				501
				502	<p>This option creates a single longer image image, by joining all the current
				503	images in sequence top-to-bottom. Use <a href="#append">+append</a> to
				504	stack images left-to-right. </p>
				505
				506	<p>If they are not of the same width, narrower images are padded with the
				507	current <a href="#background">-background</a> color setting, and their
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	508	position relative to each other can be controlled by the current <a
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	509	href="#gravity">-gravity</a> setting. </p>
				510
				511
				512	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	513	<h4><a id="attenuate"></a>-attenuate <em class="arg">value</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	514	</div>
				515
				516	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Lessen (or intensify) when adding noise to an image.</td><td style='text-align:right;'></td></tr></table>
				517
				518
				519	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	520	<h4><a id="authenticate"></a>-authenticate <em class="arg">password</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	521	</div>
				522
				523	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Decrypt a PDF with a password.</td><td style='text-align:right;'></td></tr></table>
				524
				525	<p>Use this option to supply a <em class="arg">password</em> for decrypting a PDF that has been encrypted using Microsoft Crypto API (MSC API). The encrypting using the MSC API is not supported.</p>
				526
				527	<p>For a different encryption method, see <a href="#encipher">-encipher</a> and <a href="#decipher">-decipher</a>. </p>
				528
cristy	d934d10	2009-10-10 12:55:13 +0000	[diff] [blame]	529
				530
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	531	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	532	<h4><a id="auto-gamma"></a>-auto-gamma</h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	533	</div>
				534
				535	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Automagically adjust gamma level of image.</td><td style='text-align:right;'></td></tr></table>
				536
cristy	d934d10	2009-10-10 12:55:13 +0000	[diff] [blame]	537	<p>This calculates the mean values of an image, then applies a calculated <a
				538	href="#gamma" >-gamma</a> adjustment so that is the mean color exists in the
				539	image it will get a have a value of 50%. </p>
				540
cristy	d0bd44a	2010-09-24 12:38:11 +0000	[diff] [blame]	541	<p>This means that any solid 'gray' image becomes 50% gray. </p>
cristy	d934d10	2009-10-10 12:55:13 +0000	[diff] [blame]	542
				543	<p>This works well for real-life images with little or no extreme dark and
				544	light areas, but tend to fail for images with large amounts of bright sky or
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	545	dark shadows. It also does not work well for diagrams or cartoon like images.
cristy	d934d10	2009-10-10 12:55:13 +0000	[diff] [blame]	546	</p>
				547
				548	<p>It uses the <a href="#channel" >-channel</a> setting, (including the
cristy	2dcd682	2011-06-13 16:21:20 +0000	[diff] [blame]	549	'<em>sync</em>' flag for channel synchronization), to determine which color
cristy	d0bd44a	2010-09-24 12:38:11 +0000	[diff] [blame]	550	values is used and modified. As the default <a href="#channel"
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	551	>-channel</a> setting is '<em>RGB,sync</em>', channels are modified
cristy	d934d10	2009-10-10 12:55:13 +0000	[diff] [blame]	552	together by the same gamma value, preserving colors. </p>
				553
				554
				555
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	556	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	557	<h4><a id="auto-level"></a>-auto-level</h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	558	</div>
				559
				560	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Automagically adjust color levels of image.</td><td style='text-align:right;'></td></tr></table>
				561
cristy	d934d10	2009-10-10 12:55:13 +0000	[diff] [blame]	562	<p>This is a 'perfect' image normalization operator. It finds the exact
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	563	minimum and maximum color values in the image and then applies a <a
cristy	d934d10	2009-10-10 12:55:13 +0000	[diff] [blame]	564	href="#level" >-level</a> operator to stretch the values to the full range of
				565	values. </p>
				566
cristy	8354396	2009-10-16 19:04:28 +0000	[diff] [blame]	567	<p>The operator is not typically used for real-life images, image scans, or
cristy	d934d10	2009-10-10 12:55:13 +0000	[diff] [blame]	568	JPEG format images, as a single 'out-rider' pixel can set a bad min/max values
				569	for the <a href="#level" >-level</a> operation. On the other hand it is the
				570	right operator to use for color stretching gradient images being used to
				571	generate Color lookup tables, distortion maps, or other 'mathematically'
				572	defined images. </p>
				573
				574	<p>The operator is very similar to the <a href="#normalize">-normalize</a>, <a
				575	href="#contrast-stretch" >-contrast-stretch</a>, and <a href="#linear-stretch"
				576	>-linear-stretch</a> operators, but without 'histogram binning' or 'clipping'
				577	problems that these operators may have. That is <a href="#auto-level"
cristy	8354396	2009-10-16 19:04:28 +0000	[diff] [blame]	578	>-auto-level</a> is the perfect or ideal version these operators. </p>
cristy	d934d10	2009-10-10 12:55:13 +0000	[diff] [blame]	579
				580	<p>It uses the <a href="#channel" >-channel</a> setting, (including the
cristy	2dcd682	2011-06-13 16:21:20 +0000	[diff] [blame]	581	special '<em>sync</em>' flag for channel synchronization), to determine
cristy	d0bd44a	2010-09-24 12:38:11 +0000	[diff] [blame]	582	which color values are used and modified. As the default <a
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	583	href="#channel" >+channel</a> setting is '<em>RGB,sync</em>', the
				584	'<em>sync</em>' ensures that the color channels will are modified
cristy	8354396	2009-10-16 19:04:28 +0000	[diff] [blame]	585	together by the same gamma value, preserving colors, and ignoring
				586	transparency. </p>
cristy	d934d10	2009-10-10 12:55:13 +0000	[diff] [blame]	587
				588
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	589	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	590	<h4><a id="auto-orient"></a>-auto-orient</h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	591	</div>
				592
				593	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Automagically orient (rotate) an image created by a digital camera.</td><td style='text-align:right;'></td></tr></table>
				594
cristy	8354396	2009-10-16 19:04:28 +0000	[diff] [blame]	595	<p>This operator reads and resets the EXIF image profile setting 'Orientation'
				596	and then performs the appropriate 90 degree rotation on the image to orient
				597	the image, for correct viewing. </p>
				598
				599	<p>This EXIF profile setting is usually set using a gravity sensor in digital
				600	camara, however photos taken directly downward or upward may not have an
				601	appropriate value. Also images that have been orientation 'corrected' without
				602	reseting this setting, may be 'corrected' again resulting in a incorrect
				603	result. If the he EXIF profile was previously stripped, the <a
				604	href="#auto-orient" >-auto-orient</a> operator will do nothing. </p>
				605
				606
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	607	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	608	<h4><a id="average"></a>-average</h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	609	</div>
				610
				611	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Average a set of images.</td><td style='text-align:right;'></td></tr></table>
				612
				613	<p>An error results if the images are not identically sized.</p>
				614
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	615
				616	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	617	<h4><a id="backdrop"></a>-backdrop</h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	618	</div>
				619
				620	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Display the image centered on a backdrop.</td><td style='text-align:right;'>[<a href="../www/animate.html">animate</a>, <a href="../www/display.html">display</a>]</td></tr></table>
				621
				622	<p>This backdrop covers the entire workstation screen and is useful for hiding other X window activity while viewing the image. The color of the backdrop is specified as the background color. The color is specified using the format described under the <a href="#fill">-fill</a> option.</p>
				623
				624	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	625	<h4><a id="background"></a>-background <em class="arg">color</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	626	</div>
				627
				628	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Set the background color.</td><td style='text-align:right;'></td></tr></table>
				629
				630	<p>The color is specified using the format described under the <a href="#fill">-fill</a> option. The default background color (if none is specified or found in the image) is white.</p>
				631
				632	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	633	<h4><a id="bench"></a>-bench <em class="arg">iterations</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	634	</div>
				635
				636	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Measure performance.</td><td style='text-align:right;'></td></tr></table>
				637
cristy	e637813	2009-10-26 20:05:17 +0000	[diff] [blame]	638	<p>Repeat the entire command for the given number of <em class="arg">iterations</em> and report the user-time and elapsed time. For instance, consider the following command and its output. Modify the benchmark with the -duration to run the benchmark for a fixed number of seconds and -concurrent to run the benchmark in parallel (requires the OpenMP feature).</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	639
cristy	e637813	2009-10-26 20:05:17 +0000	[diff] [blame]	640	<p class='crt'><span class="crtprompt"> $magick> </span><span class='crtin'>convert logo: -resize 1000% -bench 5 logo.png</span><span class='crtout'>Performance: 5i 0.875657ips 6.880u 0:05.710</span></p>
				641	<p>In this example, 5 iterations were completed at 0.875657 iterations per second, using 6.88 seconds of the user's allotted time, for a total elapsed time of 5.71 seconds.</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	642
				643	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	644	<h4><a id="bias"></a>-bias <em class="arg">value</em>{<em class="arg">%</em>}</h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	645	</div>
				646
				647	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Add bias when convolving an image.</td><td style='text-align:right;'></td></tr></table>
				648
				649	<p>This option shifts the output of <a href="../www/command-line-options.html#convolve">‑convolve</a> so that positive and negative results are relative to the specified bias value. </p>
				650
				651	<p>This is important for non-HDRI compilations of ImageMagick when dealing with convolutions that contain negative as well as positive values. This is especially the case with convolutions involving high pass filters or edge detection. Without an output bias, the negative values are clipped at zero.</p>
				652
				653	<p>When using an ImageMagick with the HDRI compile-time setting, <a href="../www/command-line-options.html#bias">‑bias</a> is not needed, as ImageMagick is able to store/handle any
				654	negative results without clipping to the color value range
				655	(0..QuantumRange).</p>
				656
				657	<p>See the discussion on HDRI implementations of ImageMagick on the page
cristy	4777498	2011-02-15 15:17:19 +0000	[diff] [blame]	658	<a href="../www/high-dynamic-range.html">High Dynamic-Range Images</a>. For more about HDRI go the ImageMagick <a href="http://www.imagemagick.org/Usage/basics/#hdri">Usage</a> pages or this <a href="http://en.wikipedia.org/wiki/High_dynamic_range_imaging">Wikipedia</a> entry.
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	659	</p>
				660
				661	<div style="margin: auto;">
cristy	37e0dfd	2011-03-06 16:35:34 +0000	[diff] [blame]	662	<h4><a id="black-point-compensation"></a>-black-point-compensation</h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	663	</div>
				664
				665	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Use black point compensation.</td><td style='text-align:right;'></td></tr></table>
				666
				667	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	668	<h4><a id="black-threshold"></a>-black-threshold <em class="arg">value</em>{<em class="arg">%</em>}</h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	669	</div>
				670
cristy	5cadd61	2009-09-21 19:33:41 +0000	[diff] [blame]	671	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Force to black all pixels below the threshold while leaving all pixels at or above the threshold unchanged.</td><td style='text-align:right;'></td></tr></table>
				672
				673	<p> The threshold value can be given as a percentage or as an absolute integer value within [0, <em class="QR">QuantumRange</em>] corresponding to the desired <a href="../www/command-line-options.html#channel">‑channel</a> value. See <a href="../www/command-line-options.html#threshold">‑threshold</a> for more details on thresholds and resulting values.
				674	</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	675
				676
				677	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	678	<h4><a id="blend"></a>-blend <em class="arg">geometry</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	679	</div>
				680
cristy	83a272e	2010-05-07 20:40:35 +0000	[diff] [blame]	681	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>blend an image into another by the given absolute value or percent.</td><td style='text-align:right;'>[<a href="../www/composite.html">composite</a>]</td></tr></table>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	682
				683	<p>Blend will average the images together ('plus') according to the
				684	percentages given and each pixels transparency. If only a single percentage
				685	value is given it sets the weight of the composite or 'source' image, while
				686	the background image is weighted by the exact opposite amount. That is a
cristy	83a272e	2010-05-07 20:40:35 +0000	[diff] [blame]	687	<kbd>-blend 30%</kbd> merges 30% of the 'source' image with 70% of the
				688	'destination' image. Thus it is equivalent to <kbd>-blend 30x70%</kbd>.</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	689
				690
				691	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	692	<h4><a id="blue-primary"></a>-blue-primary <em class="arg">x</em>,<em class="arg">y</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	693	</div>
				694
				695	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Set the blue chromaticity primary point.</td><td style='text-align:right;'></td></tr></table>
				696
				697	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	698	<h4><a id="blue-shift"></a>-blue-shift <em class="arg">factor</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	699	</div>
				700
				701	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>simulate a scene at nighttime in the moonlight. Start with a factor of 1.5</td><td style='text-align:right;'></td></tr></table>
				702
				703	<div style="margin: auto;">
				704
				705	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	706	<h4><a id="blur"></a>-blur <em class="arg">radius</em><br />-blur <em class="arg">radius</em>x<em class="arg">sigma</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	707	</div>
				708
				709	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Reduce image noise and reduce detail levels.</td><td style='text-align:right;'></td></tr></table>
				710
cristy	b15553d	2010-07-03 22:53:14 +0000	[diff] [blame]	711	<p>Convolve the image with a Gaussian or normal distribution using the given
				712	<em class="arg" >Sigma</em> value. The formula is:</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	713
				714	<div class="eqn"><img alt="gaussian distribution" width="243px" height="42px" src="../images/gaussian-blur.png"/>
				715	</div>
				716
cristy	b15553d	2010-07-03 22:53:14 +0000	[diff] [blame]	717	<p>The <em class="arg" >Sigma</em> value is the important argument, and
cristy	efb2bdb	2010-11-20 19:35:22 +0000	[diff] [blame]	718	determines the actual amount of blurring that will take place. </p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	719
cristy	b15553d	2010-07-03 22:53:14 +0000	[diff] [blame]	720	<p>The <em class="arg" >Radius</em> is only used to determine the size of the
cristy	efb2bdb	2010-11-20 19:35:22 +0000	[diff] [blame]	721	array which will hold the calculated Gaussian distribution. It should be an
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	722	integer. If not given, or set to zero, IM will calculate the largest possible
cristy	b15553d	2010-07-03 22:53:14 +0000	[diff] [blame]	723	radius that will provide meaningful results for the Gaussian distribution.
				724	</p>
				725
				726	<p>The larger the <em class="arg" >Radius</em> the radius the slower the
				727	operation is. However too small a <em class="arg" >Radius</em>, and sever
				728	aliasing effects may result. As a guideline, <em class="arg" >Radius</em>
				729	should be at least twice the <em class="arg" >Sigma</em> value, though three
				730	times will produce a more accurite result. </p>
				731
				732	<p>This option differs from <a href="#gaussian-blur">-gaussian-blur</a> simply
				733	by taking advantage of the separability properties of the distribution. Here
				734	we apply a single-dimensional Gaussian matrix in the horizontal direction,
				735	then repeat the process in the vertical direction.</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	736
				737	<p>The <a href="#virtual-pixel">-virtual-pixel</a> setting will determine how
				738	pixels which are outside the image proper are blurred into the final result.
				739	</p>
				740
				741
				742	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	743	<h4>-blur <em class="arg">Width</em>[x<em class="arg">Height</em>[+<em class="arg">Angle</em>]]</h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	744	</div>
				745
				746	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Variably blur and image according to the overlay mapping.</td><td style='text-align:right;'>[<a href="../www/composite.html">composite</a>]</td></tr></table>
				747
				748	<p>Each pixel in the overlaid region is replaced with an Elliptical Weighted
				749	Average (EWA) of the source image, scaled according to the grayscale
				750	mapping. </p>
				751
				752	<p>The ellipse is weighted with sigma set to the given <em class="arg"
				753	>Width</em> and <em class="arg" >Height</em>. The <em class="arg" >Height</em>
				754	defaults to the <em class="arg" >Width</em> for a normal circular Guassian
				755	weighting. The <em class="arg" >Angle</em> will rotate the ellipse from
				756	horizontal clock-wise. </p>
				757
				758	<p>The <a href="#virtual-pixel">-virtual-pixel</a> setting will determine how
				759	pixels which are outside the image proper are blurred into the final result.
				760	</p>
				761
				762
				763	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	764	<h4><a id="border"></a>-border <em class="arg">geometry</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	765	</div>
				766
				767	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Surround the image with a border of color. </td><td style='text-align:right;'></td></tr></table>
				768
cristy	bc9539a	2010-08-16 18:06:20 +0000	[diff] [blame]	769	<p>Set the width and height using the <em class="arg">size</em> portion of the
				770	<em class="arg">gravity</em> argument. See <a href="../www/command-line-processing.html#geometry">Image Geometry</a> for complete details about the <em class="arg">geometry</em> argument. Offsets are
				771	ignored. </p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	772
cristy	bc9539a	2010-08-16 18:06:20 +0000	[diff] [blame]	773	<p>Set the border color by preceding with the <a
				774	href="#bordercolor">-bordercolor</a> setting.</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	775
cristy	bc9539a	2010-08-16 18:06:20 +0000	[diff] [blame]	776	<p>The <a href="#border">-border</a> operation is affected by the current <a
				777	href="#compose">-compose</a> setting and assumes that this is using the default
				778	'<kbd>Over</kbd>' composition method. It generates a image of the appropriate
				779	size colors by the current <a href="#bordercolor">-bordercolor</a> before
				780	overlaying the original image in the center of this net image. This means that
				781	with the default compose method of '<kbd>Over</kbd>' any transparent parts may
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	782	be replaced by the current <a href="#bordercolor">-bordercolor</a> setting.</p>
cristy	bc9539a	2010-08-16 18:06:20 +0000	[diff] [blame]	783	<p>See also the <a href="#frame">-frame</a> option, which has more
				784	functionality.</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	785
				786	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	787	<h4><a id="bordercolor"></a>-bordercolor <em class="arg">color</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	788	</div>
				789
				790	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Set the border color.</td><td style='text-align:right;'></td></tr></table>
				791
				792	<p>The color is specified using the format described under the <a href="#fill">-fill</a> option.</p>
				793
				794	<p>The default border color is <kbd>#DFDFDF</kbd>, <span style="background-color: #dfdfdf;">this shade of gray</span>.</p>
				795
				796	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	797	<h4><a id="borderwidth"></a>-borderwidth <em class="arg">geometry</em> </h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	798	</div>
				799
				800	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Set the border width.</td><td style='text-align:right;'>[<a href="../www/animate.html">animate</a>, <a href="../www/display.html">display</a>]</td></tr></table>
				801
				802	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	803	<h4><a id="brightness-contrast"></a>-brightness-contrast <em class="arg">brightness</em><br />-brightness-contrast <em class="arg">brightness</em>{x<em class="arg">contrast</em>}{<em class="arg">%</em>}}</h4>
cristy	16ff93c	2010-01-13 23:18:07 +0000	[diff] [blame]	804	</div>
				805
				806	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Adjust the brightness and/or contrast of the image.</td><td style='text-align:right;'></td></tr></table>
				807
cristy	efb2bdb	2010-11-20 19:35:22 +0000	[diff] [blame]	808	<p>Brightness and Contrast values apply changes to the input image. They are
				809	not absolute settings. A brightness or contrast value of zero means no change.
				810	The range of values is -100 to +100 on each. Positive values increase the
				811	brightness or contrast and negative values decrease the brightness or contrast.
				812	To control only contrast, set the brightness=0. To control only brightness,
				813	set contrast=0 or just leave it off.</p>
cristy	16ff93c	2010-01-13 23:18:07 +0000	[diff] [blame]	814
cristy	efb2bdb	2010-11-20 19:35:22 +0000	[diff] [blame]	815	<p>You may also use <a href="#fill">-channel</a> to control which channels to
				816	apply the brightness and/or contrast change. The default is to apply the same
				817	transformation to all channels.</p>
cristy	16ff93c	2010-01-13 23:18:07 +0000	[diff] [blame]	818
cristy	efb2bdb	2010-11-20 19:35:22 +0000	[diff] [blame]	819	<p>Brightness and Contrast arguments are converted to offset and slope of a
				820	linear transform and applied
				821	using <a href="#fill">-function polynomial "slope,offset"</a>.</p>
cristy	16ff93c	2010-01-13 23:18:07 +0000	[diff] [blame]	822
cristy	efb2bdb	2010-11-20 19:35:22 +0000	[diff] [blame]	823	<p>The slope varies from 0 at contrast=-100 to almost vertical at
				824	contrast=+100. For brightness=0 and contrast=-100, the result are totally
				825	midgray. For brightness=0 and contrast=+100, the result will approach but
				826	not quite reach a threshold at midgray; that is the linear transformation
				827	is a very steep vertical line at mid gray.</p>
cristy	16ff93c	2010-01-13 23:18:07 +0000	[diff] [blame]	828
cristy	efb2bdb	2010-11-20 19:35:22 +0000	[diff] [blame]	829	<p>Negative slopes, i.e. negating the image, are not possible with this
				830	function. All achievable slopes are zero or positive.</p>
cristy	16ff93c	2010-01-13 23:18:07 +0000	[diff] [blame]	831
cristy	efb2bdb	2010-11-20 19:35:22 +0000	[diff] [blame]	832	<p>The offset varies from -0.5 at brightness=-100 to 0 at brightness=0 to +0.5
				833	at brightness=+100. Thus, when contrast=0 and brightness=100, the result is
				834	totally white. Similarly, when contrast=0 and brightness=-100, the result is
				835	totally black.</p>
cristy	16ff93c	2010-01-13 23:18:07 +0000	[diff] [blame]	836
cristy	efb2bdb	2010-11-20 19:35:22 +0000	[diff] [blame]	837	<p>As the range of values for the arguments are -100 to +100, adding the '%'
				838	symbol is no different than leaving it off.</p>
cristy	16ff93c	2010-01-13 23:18:07 +0000	[diff] [blame]	839
				840	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	841	<h4><a id="cache"></a>-cache <em class="arg">threshold</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	842	</div>
				843
				844	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>(This option has been replaced by the <a href='#limit'>-limit</a> option.)</td><td style='text-align:right;'></td></tr></table>
				845
				846	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	847	<h4><a id="caption"></a>-caption <em class="arg">string</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	848	</div>
				849
				850	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Assign a caption to an image.</td><td style='text-align:right;'></td></tr></table>
				851
cristy	71a3f60	2010-09-15 12:38:16 +0000	[diff] [blame]	852	<p>This option sets the caption meta-data of an image read in after this
				853	option has been given. To modify a caption of images already in memory use
				854	"<kbd><a href="#set">-set</a> caption</kbd>". </p>
				855
				856	<p>The caption can contain special format characters listed in the <a
				857	href="../www/escape.html">Format and
cristy	d0bd44a	2010-09-24 12:38:11 +0000	[diff] [blame]	858	Print Image Properties</a>. These attributes are expanded when the caption
cristy	71a3f60	2010-09-15 12:38:16 +0000	[diff] [blame]	859	is finally assigned to the individual images. </p>
				860
				861	<p>If the first character of <em class="arg">string</em> is <em
				862	class="arg">@</em>, the image caption is read from a file titled by the
				863	remaining characters in the string. Comments read in from a file are literal;
				864	no embedded formatting characters are recognized.</p>
				865
				866	<p>Caption meta-data ais not visible on the image itself. To do that use the
				867	<a href="#annotate">-annotate</a> or <a href="#draw">-draw</a> options
				868	instead.</p>
				869
				870	<p>For example,</p>
				871
				872	<p class="crtsnip">
				873	-caption "%m:%f %wx%h" bird.miff
				874	</p>
				875
				876	<p>produces an image caption of <kbd>MIFF:bird.miff 512x480</kbd> (assuming
				877	that the image <kbd>bird.miff</kbd> has a width of 512 and a height of
				878	480.</p>
				879
				880
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	881	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	882	<h4><a id="cdl"></a>-cdl <em class="arg">filename</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	883	</div>
				884
				885	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>color correct with a color decision list.</td><td style='text-align:right;'></td></tr></table>
				886
				887	<p>Here is an example color correction collection:</p>
				888
				889	<pre class="text">
cristy	bac7a16	2010-06-15 19:57:29 +0000	[diff] [blame]	890	<?xml version="1.0" encoding="UTF-8"?>
				891	<ColorCorrectionCollection xmlns="urn:ASC:CDL:v1.2">
				892	<ColorCorrection id="cc06668">
				893	<SOPNode>
				894	<Slope> 0.9 1.2 0.5 </Slope>
				895	<Offset> 0.4 -0.5 0.6 </Offset>
				896	<Power> 1.0 0.8 1.5 </Power>
				897	</SOPNode>
				898	<SATNode>
				899	<Saturation> 0.85 </Saturation>
				900	</SATNode>
				901	</ColorCorrection>
				902	</ColorCorrectionCollection>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	903	</pre>
				904
				905	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	906	<h4><a id="channel"></a>-channel <em class="arg">type</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	907	</div>
				908
				909	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Specify those image color channels to which subsequent operators are limited.</td><td style='text-align:right;'></td></tr></table>
				910
cristy	efb2bdb	2010-11-20 19:35:22 +0000	[diff] [blame]	911	<p>Choose from: <kbd>Red</kbd>, <kbd>Green</kbd>, <kbd>Blue</kbd>,
				912	<kbd>Alpha</kbd>, <kbd>Cyan</kbd>, <kbd>Magenta</kbd>, <kbd>Yellow</kbd>,
				913	<kbd>Black</kbd>, <kbd>Opacity</kbd>, <kbd>Index</kbd>, <kbd>RGB</kbd>,
				914	<kbd>RGBA</kbd>, <kbd>CMYK</kbd>, or <kbd>CMYKA</kbd>.</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	915
cristy	83a272e	2010-05-07 20:40:35 +0000	[diff] [blame]	916	<p>The channels above can also be specified as a comma-separated list or can be
cristy	d934d10	2009-10-10 12:55:13 +0000	[diff] [blame]	917	abbreviated as a concatenation of the letters '<kbd>R</kbd>', '<kbd>G</kbd>',
				918	'<kbd>B</kbd>', '<kbd>A</kbd>', '<kbd>O</kbd>', '<kbd>C</kbd>',
				919	'<kbd>M</kbd>', '<kbd>Y</kbd>', '<kbd>K</kbd>'.
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	920
cristy	83a272e	2010-05-07 20:40:35 +0000	[diff] [blame]	921	For example, to only select the <kbd>Red</kbd> and <kbd>Blue</kbd> channels
				922	you can either use </p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	923	<p class="crtsnip">
cristy	83a272e	2010-05-07 20:40:35 +0000	[diff] [blame]	924	-channel Red,Blue
				925	</p>
				926	<p>or you can use the short hand form</p>
				927	<p class="crtsnip">
				928	-channel RB
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	929	</p>
				930
cristy	2dcd682	2011-06-13 16:21:20 +0000	[diff] [blame]	931	<p>All the channels that are present in an image can be specified using the
cristy	bac7a16	2010-06-15 19:57:29 +0000	[diff] [blame]	932	special channel type <kbd>All</kbd>. Not all operators are 'channel capable',
				933	but generally any operators that are generally 'grey-scale' image operators,
				934	will understand this setting. See individual operator documentation. </p>
				935
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	936	<br />
cristy	83a272e	2010-05-07 20:40:35 +0000	[diff] [blame]	937
cristy	2dcd682	2011-06-13 16:21:20 +0000	[diff] [blame]	938	<p>On top of the normal channel selection an extra flag can be specified,
cristy	83a272e	2010-05-07 20:40:35 +0000	[diff] [blame]	939	'<kbd>Sync</kbd>'. This is turned on by default and if set means that
cristy	bac7a16	2010-06-15 19:57:29 +0000	[diff] [blame]	940	operators that understand this flag should perform: cross-channel
cristy	2dcd682	2011-06-13 16:21:20 +0000	[diff] [blame]	941	synchronization of the channels. If not specified, then most grey-scale
cristy	bac7a16	2010-06-15 19:57:29 +0000	[diff] [blame]	942	operators will apply their image processing operations to each individual
				943	channel (as specified by the rest of the <a href="#channel">-channel</a>
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	944	setting) completely independently from each other. </p>
cristy	83a272e	2010-05-07 20:40:35 +0000	[diff] [blame]	945
				946	<p>For example for operators such as <a href="#auto-level">-auto-level</a> and
cristy	d0bd44a	2010-09-24 12:38:11 +0000	[diff] [blame]	947	<a href="#auto-gamma">-auto-gamma</a> the color channels are modified
cristy	83a272e	2010-05-07 20:40:35 +0000	[diff] [blame]	948	together in exactly the same way so that colors will remain in-sync. Without
cristy	d0bd44a	2010-09-24 12:38:11 +0000	[diff] [blame]	949	it being set, then each channel is modified separately and
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	950	independently, which may produce color distortion. </p>
cristy	83a272e	2010-05-07 20:40:35 +0000	[diff] [blame]	951
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	952	<p>The <a href="#morphology">-morphology</a> '<kbd>Convolve</kbd>' method
cristy	bac7a16	2010-06-15 19:57:29 +0000	[diff] [blame]	953	and the <a href="#compose">-compose</a> mathematical methods, also understands
				954	the '<kbd>Sync</kbd>' flag to modify the behaviour of pixel colors according
				955	to the alpha channel (if present). That is to say it will modify the image
				956	processing with the understanding that fully-transparent colors should not
				957	contribute to the final result. </p>
				958
cristy	2dcd682	2011-06-13 16:21:20 +0000	[diff] [blame]	959	<p>Basically, by default, operators work with color channels in synchronous, and
cristy	bac7a16	2010-06-15 19:57:29 +0000	[diff] [blame]	960	treats transparency as special, unless the <a href="#channel">-channel</a>
				961	setting is modified so as to remove the effect of the '<kbd>Sync</kbd>' flag.
				962	How each operator does this depends on that operators current implementation.
				963	Not all operators understands this flag at this time, but that is changing.
				964	</p>
cristy	83a272e	2010-05-07 20:40:35 +0000	[diff] [blame]	965
				966	<p>To print a complete list of channel types, use <a href="#list">-list
				967	channel</a>.</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	968
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	969	<br />
cristy	d934d10	2009-10-10 12:55:13 +0000	[diff] [blame]	970
				971	<p>By default, ImageMagick sets <a href="#channel">-channel</a> to the value
cristy	bac7a16	2010-06-15 19:57:29 +0000	[diff] [blame]	972	'<kbd>RGBK,sync</kbd>', which specifies that operators act on all color
				973	channels except the transparency channel, and that all the color channels are
				974	to be modified in exactly the same way, with a understanding of transprancy
				975	(depending on the operation being applied). The 'plus' form <a
				976	href="#channel" >+channel</a> will reset the value back to this default. </p>
cristy	d934d10	2009-10-10 12:55:13 +0000	[diff] [blame]	977
				978	<p>Options that are affected by the <a href="#channel" >-channel</a> setting
				979	include the following.
				980
				981	<a href="#auto-gamma">-auto-gamma</a>,
				982	<a href="#auto-level">-auto-level</a>,
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	983	<a href="#black-threshold">-black-threshold</a>,
				984	<a href="#blur">-blur</a>,
cristy	b4c03bb	2009-09-27 13:55:46 +0000	[diff] [blame]	985	<a href="#clamp">-clamp</a>,
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	986	<a href="#clut">-clut</a>,
				987	<a href="#combine">-combine</a>,
cristy	bac7a16	2010-06-15 19:57:29 +0000	[diff] [blame]	988	<a href="#composite">-composite</a> (Mathematical compose methods only),
				989	<a href="#convolve">-convolve</a>,
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	990	<a href="#contrast-stretch">-contrast-stretch</a>,
				991	<a href="#evaluate">-evaluate</a>,
				992	<a href="#function">-function</a>,
				993	<a href="#fx">-fx</a>,
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	994	<a href="#gaussian-blur">-gaussian-blur</a>,
cristy	d934d10	2009-10-10 12:55:13 +0000	[diff] [blame]	995	<a href="#hald-clut">-hald-clut</a>,
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	996	<a href="#motion-blur">-motion-blur</a>,
cristy	bac7a16	2010-06-15 19:57:29 +0000	[diff] [blame]	997	<a href="#morphology">-morphology</a>,
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	998	<a href="#negate">-negate</a>,
				999	<a href="#normalize">-normalize</a>,
				1000	<a href="#ordered-dither">-ordered-dither</a>,
				1001	<a href="#radial-blur">-radial-blur</a>,
				1002	<a href="#random-threshold">-random-threshold</a>,
cristy	bac7a16	2010-06-15 19:57:29 +0000	[diff] [blame]	1003	<a href="#separate">-separate</a>,
cristy	d934d10	2009-10-10 12:55:13 +0000	[diff] [blame]	1004	<a href="#threshold">-threshold</a>, and
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1005	<a href="#white-threshold">-white-threshold</a>.
				1006	</p>
				1007
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	1008	<p>Warning, some operators behave differently when the <a href="#channel"
cristy	d934d10	2009-10-10 12:55:13 +0000	[diff] [blame]	1009	>+channel</a> default setting is in effect, verses ANY user defined <a
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	1010	href="#channel" >-channel</a> setting (including the equivalent of the
cristy	83a272e	2010-05-07 20:40:35 +0000	[diff] [blame]	1011	default). These operators have yet to be made to understand the newer 'Sync'
				1012	flag. </p>
				1013
cristy	bac7a16	2010-06-15 19:57:29 +0000	[diff] [blame]	1014	<p>For example <a href="#threshold">-threshold</a> will by default gray-scale
				1015	the image before thresholding, if no <a href="#channel" >-channel</a> setting
				1016	has been defined. This is not 'Sync flag controlled, yet. </p>
cristy	d934d10	2009-10-10 12:55:13 +0000	[diff] [blame]	1017
				1018	<p>Also some operators such as <a href="#blur">-blur</a>, <a
				1019	href="#gaussian-blur">-gaussian-blur</a>, will modify their handling of the
				1020	color channels if the '<kbd>alpha</kbd>' channel is also enabled by <a
				1021	href="#channel" >-channel</a>. Generally this done to ensure that
				1022	fully-transparent colors are treated as being fully-transparent, and thus any
				1023	underlying 'hidden' color has no effect on the final results. Typically
cristy	bac7a16	2010-06-15 19:57:29 +0000	[diff] [blame]	1024	resulting in 'halo' effects. The newer <a href="#morphology">-morphology</a>
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	1025	convolution equivalents however does have a understanding of the 'Sync' flag
cristy	bac7a16	2010-06-15 19:57:29 +0000	[diff] [blame]	1026	and will thus handle transparency correctly by default. </p>
cristy	d934d10	2009-10-10 12:55:13 +0000	[diff] [blame]	1027
cristy	bac7a16	2010-06-15 19:57:29 +0000	[diff] [blame]	1028	<p>As a alpha channel is optional within images, some operators will read the
cristy	d934d10	2009-10-10 12:55:13 +0000	[diff] [blame]	1029	color channels of an image as a greyscale alpha mask, when the image has no
cristy	bac7a16	2010-06-15 19:57:29 +0000	[diff] [blame]	1030	alpha channel present, and the <a href="#channel" >-channel</a> setting tells
				1031	the operator to apply the operation using alpha channels. The <a
				1032	href="#clut">-clut</a> operator is a good example of this. </p>
cristy	d934d10	2009-10-10 12:55:13 +0000	[diff] [blame]	1033
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1034
				1035	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	1036	<h4><a id="clamp"></a>-clamp</h4>
cristy	b4c03bb	2009-09-27 13:55:46 +0000	[diff] [blame]	1037	</div>
				1038
				1039	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Restrict image colors from 0 to the quantum depth.</td><td style='text-align:right;'></td></tr></table>
				1040
				1041	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	1042	<h4><a id="charcoal"></a>-charcoal <em class="arg">factor</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1043	</div>
				1044
				1045	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Simulate a charcoal drawing.</td><td style='text-align:right;'></td></tr></table>
				1046
				1047	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	1048	<h4><a id="chop"></a>-chop <em class="arg">geometry</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1049	</div>
				1050
				1051	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Remove pixels from the interior of an image.</td><td style='text-align:right;'></td></tr></table>
				1052
cristy	efb2bdb	2010-11-20 19:35:22 +0000	[diff] [blame]	1053	<p>See <a href="../www/command-line-processing.html#geometry">Image Geometry</a> for complete details about the <em class="arg">geometry</em> argument. The <em class="arg">width</em>
				1054	and <em class="arg">height</em> given in the of the <em class="arg">size</em>
				1055	portion of the <em class="arg">geometry</em> argument give the number of
				1056	columns and rows to remove. The <em class="arg">offset</em> portion of
				1057	the <em class="arg">geometry</em> argument is influenced by
				1058	a <a href="#gravity">-gravity</a> setting, if present.</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1059
cristy	efb2bdb	2010-11-20 19:35:22 +0000	[diff] [blame]	1060	<p>The <a href="#chop">-chop</a> option removes entire rows and columns,
				1061	and moves the remaining corner blocks leftward and upward to close the gaps.</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1062
cristy	acc0488	2011-05-04 23:03:43 +0000	[diff] [blame]	1063	<p>While it can remove internal rows and columns of pixels, it is more
				1064	typically used with as <a href="#gravity">-gravity</a> setting and zero
				1065	offsets so as to remove a single edge from an image. Compare this to <a
				1066	href="#shave" >-shave</a> which removes equal numbers of pixels from oppisite
				1067	sides of the image. </p>
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	1068
cristy	acc0488	2011-05-04 23:03:43 +0000	[diff] [blame]	1069	<p>Using <a href="#chop">-chop</a> will effectivally undo the results of a <a
				1070	href="#splice">-splice</a> that was given the same <em
				1071	class="arg">geometry</em> and <a href="#gravity">-gravity</a> settings. </p>
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	1072
				1073
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1074	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	1075	<h4><a id="clip"></a>-clip</h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1076	</div>
				1077
				1078	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Apply the clipping path if one is present.</td><td style='text-align:right;'></td></tr></table>
				1079
				1080	<p>If a clipping path is present, it is applied to subsequent operations.</p>
				1081
				1082	<p>For example, in the command</p>
				1083
				1084	<p class='crt'><span class="crtprompt"> $magick> </span><span class='crtin'>convert -clip -negate cockatoo.tif negated.tif</span></p>
				1085	<p>only the pixels within the clipping path are negated.</p>
				1086
				1087	<p>The <a href="#clip">-clip</a> feature requires the XML library. If the XML library is not present, the option is ignored.</p>
				1088
				1089	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	1090	<h4><a id="clip-mask"></a>-clip-mask</h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1091	</div>
				1092
				1093	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Clip the image as defined by this mask.</td><td style='text-align:right;'></td></tr></table>
				1094
cristy	3009279	2011-02-22 02:06:14 +0000	[diff] [blame]	1095	<p>Use the given image as a 'do-not-modify' mask of the current images in the
				1096	current image sequence. Assuming the clipmask is a greyscale image the same
				1097	size at the one already in memory, any areas that is white will not be
				1098	modified by any of the 'image processing operators' that follow, until the
				1099	mask is removed. Pixels in the black areas of the clip mask will be modified
				1100	as normal. </p>
				1101
				1102	<p>In some ways this is similar to (though not the same) as defining
				1103	a rectangular <a href="#region" >-region</a>, or using the negative of the
				1104	mask (thrid) image in a three image <a href="#composite" >-composite</a>,
				1105	operation. </p>
				1106
				1107
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1108	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	1109	<h4><a id="clip-path"></a>-clip-path <em class="arg">id</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1110	</div>
				1111
				1112	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Clip along a named path from the 8BImageMagick profile.</td><td style='text-align:right;'></td></tr></table>
				1113
cristy	d241f44	2011-03-29 13:50:49 +0000	[diff] [blame]	1114	<p>This is almost identical to <a href="#clip">-clip</a>. </p>
cristy	3009279	2011-02-22 02:06:14 +0000	[diff] [blame]	1115
				1116
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1117	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	1118	<h4><a id="clone"></a>-clone <em class="arg">index(s)</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1119	</div>
				1120
cristy	8b9dd95	2011-03-21 22:56:18 +0000	[diff] [blame]	1121	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>make a clone of an image (or images).</td><td style='text-align:right;'></td></tr></table>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1122
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	1123	<p>Inside parenthesis (where the operator is normally used) it will make a
				1124	clone of the images from the last 'pushed' image sequence, and adds them to
				1125	the end of the current image sequence. Outside parenthesis
				1126	(not recommended) it clones the images from the current image sequence. </p>
				1127
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1128	<p>Specify the image by its index in the sequence. The first image is index
cristy	efb2bdb	2010-11-20 19:35:22 +0000	[diff] [blame]	1129	0. Negative indexes are relative to the end of the sequence; for
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	1130	example, <kbd>−1</kbd>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1131	represents the last image of the sequence. Specify a range of images with a
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	1132	dash (e.g. <kbd>0−4</kbd>). Separate multiple indexes with commas but no
				1133	spaces (e.g. <kbd>0,2,5</kbd>). A value of '<kbd>0−−1</kbd> will
cristy	8b9dd95	2011-03-21 22:56:18 +0000	[diff] [blame]	1134	effectively clone all the images. </p>
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	1135
				1136	<p>The <a href="#clone">+clone</a> will simply make a copy of the last image
cristy	baacd17	2011-04-30 23:11:03 +0000	[diff] [blame]	1137	in the image sequence, and is thus equivalent to using a argument of
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	1138	'<kbd>−1</kbd>'. </p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1139
				1140	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	1141	<h4><a id="clut"></a>-clut</h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1142	</div>
				1143
				1144	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Replace the channel values in the first image using each
				1145	corresponding channel in the second image as a <b>c</b>olor
				1146	<b>l</b>ook<b>u</b>p <b>t</b>able.</td><td style='text-align:right;'></td></tr></table>
				1147
				1148	<p>The second (LUT) image is ordinarily a gradient image containing the
				1149	histogram mapping of how each channel should be modified. Typically it is a
				1150	either a single row or column image of replacement color values. If larger
				1151	than a single row or column, values are taken from a diagonal line from
				1152	top-left to bottom-right corners.</p>
				1153
				1154	<p>The lookup is further controlled by the <a
				1155	href="#interpolate">-interpolate</a> setting, which is especially handy for an
				1156	LUT which is not the full length needed by the ImageMagick installed Quality
				1157	(Q) level. Good settings for this are the '<kbd>bilinear</kbd>' and
				1158	'<kbd>bicubic</kbd>' interpolation settings, which give smooth color
				1159	gradients, and the '<kbd>integer</kbd>' setting for a direct, unsmoothed
				1160	lookup of color values. </p>
				1161
				1162	<p>This operator is especially suited to replacing a grayscale image with a
				1163	specific color gradient from the CLUT image. </p>
				1164
				1165	<p>Only the channel values defined by the <a href="#channel">-channel</a>
				1166	setting will have their values replaced. In particular, since the default <a
				1167	href="#channel">-channel</a> setting is <kbd>RGB</kbd>, this means that
				1168	transparency (alpha/matte channel) is not affected, unless the <a
				1169	href="#channel">-channel</a> setting is modified. When the alpha channel is
				1170	set, it is treated by the <a href="#clut" >-clut</a> operator in the same way
				1171	as the other channels, implying that alpha/matte values are replaced using the
				1172	alpha/matte values of the original image. </p>
				1173
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	1174	<p>If either the image being modified, or the lookup image, contains no
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1175	transparency (i.e. <a href="#alpha" >-alpha</a> is turned 'off') but the <a
				1176	href="#channel">-channel</a> setting includes alpha replacement, then it is
cristy	d0bd44a	2010-09-24 12:38:11 +0000	[diff] [blame]	1177	assumed that image represents a gray-scale gradient which is used for the
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1178	replacement alpha values. That is you can use a gray-scale CLUT image to
				1179	adjust a existing images alpha channel, or you can color a gray-scale image
				1180	using colors form CLUT containing the desired colors, including transparency.
				1181	</p>
				1182
cristy	efb2bdb	2010-11-20 19:35:22 +0000	[diff] [blame]	1183	<p>See also <a href="#hald-clut" >-hald-clut</a> which replaces colors
				1184	according to the lookup of the full color RGB value from a 2D representation
				1185	of a 3D color cube. </p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1186
				1187
				1188	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	1189	<h4><a id="coalesce"></a>-coalesce</h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1190	</div>
				1191
				1192	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Fully define the look of each frame of an GIF animation sequence, to form a 'film strip' animation.</td><td style='text-align:right;'></td></tr></table>
				1193
cristy	efb2bdb	2010-11-20 19:35:22 +0000	[diff] [blame]	1194	<p>Overlay each image in an image sequence according to
				1195	its <a href="#dispose">-dispose</a> meta-data, to reproduce the look of
				1196	an animation at each point in the animation sequence. All images should be
				1197	the same size, and are assigned appropriate GIF disposal settings for the
				1198	animation to continue working as expected as a GIF animation. Such frames
				1199	are more easily viewed and processed than the highly optimized GIF overlay
				1200	images. </p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1201
cristy	efb2bdb	2010-11-20 19:35:22 +0000	[diff] [blame]	1202	<p>The animation can be re-optimized after processing using
				1203	the <a href="#layers">-layers</a> method '<kbd>optimize</kbd>', although
				1204	there is no guarantee that the restored GIF animation optimization is
				1205	better than the original. </p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1206
				1207
				1208	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	1209	<h4><a id="colorize"></a>-colorize <em class="arg">value</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1210	</div>
				1211
				1212	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Colorize the image by an amount specified by <em class="arg">value</em> using the color specified by the most recent <a href="#fill" >-fill</a> setting.</td><td style='text-align:right;'></td></tr></table>
				1213
cristy	efb2bdb	2010-11-20 19:35:22 +0000	[diff] [blame]	1214	<p>Specify the amount of colorization as a percentage. Separate colorization
				1215	values can be applied to the red, green, and blue channels of the image with
				1216	a comma-delimited list of colorization
				1217	values (e.g., <kbd>-colorize 0,0,50</kbd>).</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1218
				1219	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	1220	<h4><a id="colormap"></a>-colormap <em class="arg">type</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1221	</div>
				1222
				1223	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Define the colormap type.</td><td style='text-align:right;'>[<a href="../www/animate.html">animate</a>, <a href="../www/display.html">display</a>]</td></tr></table>
				1224
				1225	<p>The <em class="arg">type</em> can be <kbd>shared</kbd> or <kbd>private</kbd>.</p>
				1226
cristy	efb2bdb	2010-11-20 19:35:22 +0000	[diff] [blame]	1227	<p>This option only applies when the default X server visual
				1228	is <kbd>PseudoColor</kbd> or <kbd>GrayScale</kbd>. Refer
				1229	to <a href="#visual">-visual</a> for more details. By default,
				1230	a shared colormap is allocated. The image shares colors with
				1231	other X clients. Some image colors could be approximated,
				1232	therefore your image may look very different than intended.
				1233	If <kbd>private</kbd> is chosen, the image colors appear exactly
				1234	as they are defined. However, other clients may go <em>technicolor</em>
				1235	when the image colormap is installed.</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1236
				1237	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	1238	<h4><a id="colors"></a>-colors <em class="arg">value</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1239	</div>
				1240
				1241	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Set the preferred number of colors in the image.</td><td style='text-align:right;'></td></tr></table>
				1242
cristy	efb2bdb	2010-11-20 19:35:22 +0000	[diff] [blame]	1243	<p>The actual number of colors in the image may be less than your request,
				1244	but never more. Note that this a color reduction option. Images with fewer
				1245	unique colors than specified by <em class="arg">value</em> will have any
				1246	duplicate or unused colors removed. The ordering of an existing color
				1247	palette may be altered. When converting an image from color to grayscale,
				1248	it is more efficient to convert the image to the gray colorspace before
				1249	reducing the number of colors. Refer to
				1250	the <a href="../www/quantize.html">
				1251	color reduction algorithm</a> for more details.</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1252
				1253	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	1254	<h4><a id="color-matrix"></a>-color-matrix <em class="arg">matrix</em></h4>
cristy	2c83960	2010-04-03 02:32:08 +0000	[diff] [blame]	1255	</div>
				1256
				1257	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>apply color correction to the image.</td><td style='text-align:right;'></td></tr></table>
				1258
cristy	efb2bdb	2010-11-20 19:35:22 +0000	[diff] [blame]	1259	<p>This option permits saturation changes, hue rotation, luminance to alpha,
				1260	and various other effects. Although variable-sized transformation matrices
				1261	can be used, typically one uses a 5x5 matrix for an RGBA image and a 6x6
				1262	for CMYKA (or RGBA with offsets). The matrix is similar to those used by
				1263	Adobe Flash except offsets are in column 6 rather than 5 (in support of
				1264	CMYKA images) and offsets are normalized (divide Flash offset by 255).</p>
cristy	2c83960	2010-04-03 02:32:08 +0000	[diff] [blame]	1265
				1266	<p>As an example, to add contrast to an image with offsets, try this command:</p>
				1267
				1268	<pre class="text">
cristy	e9a32c3	2011-04-07 01:11:05 +0000	[diff] [blame]	1269	convert kittens.jpg -color-matrix \
				1270	" 1.5 0.0 0.0 0.0, 0.0, -0.157 \
				1271	0.0 1.5 0.0 0.0, 0.0, -0.157 \
				1272	0.0 0.0 1.5 0.0, 0.0, -0.157 \
				1273	0.0 0.0 0.0 1.0, 0.0, 0.0 \
				1274	0.0 0.0 0.0 0.0, 1.0, 0.0 \
				1275	0.0 0.0 0.0 0.0, 0.0, 1.0" kittens.png
cristy	2c83960	2010-04-03 02:32:08 +0000	[diff] [blame]	1276	</pre>
				1277	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	1278	<h4><a id="colorspace"></a>-colorspace <em class="arg">value</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1279	</div>
				1280
				1281	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Set the image colorspace.</td><td style='text-align:right;'></td></tr></table>
				1282
				1283	<p>Choices are:</p>
				1284
				1285	<pre class="text">
cristy	e9a32c3	2011-04-07 01:11:05 +0000	[diff] [blame]	1286	CMY CMYK Gray HSB
				1287	HSL HWB Lab Log
				1288	OHTA Rec601Luma Rec601YCbCr Rec709Luma
				1289	Rec709YCbCr RGB sRGB Transparent
				1290	XYZ YCbCr YCC YIQ
				1291	YPbPr YUV
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1292	</pre>
				1293
				1294	<p>To print a complete list of colorspaces, use <a href="#list">-list colorspace</a>.</p>
				1295
				1296	<p>For a more accurate color conversion to or from the RGB, CMYK, or grayscale colorspaces, use the <a href="#profile">-profile</a> option.</p>
				1297
				1298	<table class="doc">
				1299	<caption>Conversion Of RGB To Other Color Spaces</caption>
				1300	<tr><th align="left" valign="middle">CMY</th></tr>
				1301	<tr><td align="left" valign="middle">C=<em class="QR">QuantumRange</em>−R</td></tr>
				1302	<tr><td align="left" valign="middle">M=<em class="QR">QuantumRange</em>−G</td></tr>
				1303	<tr><td align="left" valign="middle">Y=<em class="QR">QuantumRange</em>−B</td></tr>
				1304	<tr><th align="left" valign="middle">CMYK — starts with CMY from above</th></tr>
				1305	<tr><td align="left" valign="middle">K=min(C,Y,M)</td></tr>
				1306	<tr><td align="left" valign="middle">C=<em class="QR">QuantumRange</em>*(C−K)/(<em class="QR">QuantumRange</em>−K)</td></tr>
				1307	<tr><td align="left" valign="middle">M=<em class="QR">QuantumRange</em>*(M−K)/(<em class="QR">QuantumRange</em>−K)</td></tr>
				1308	<tr><td align="left" valign="middle">Y=<em class="QR">QuantumRange</em>*(Y−K)/(<em class="QR">QuantumRange</em>−K)</td></tr>
				1309
				1310	<tr><th align="left" valign="middle">Gray</th></tr>
				1311	<tr><td align="left" valign="middle">Gray = 0.29900R+0.58700G+0.11400*B</td></tr>
				1312
				1313	<tr><th align="left" valign="middle">HSB — Hue, Saturation, Brightness; like a cone peak downward</th></tr>
				1314	<tr><td align="left" valign="middle">H=angle around perimeter (0 to 360 deg); H=0 is red; increasing angles toward green</td></tr>
				1315	<tr><td align="left" valign="middle">S=distance from axis outward</td></tr>
				1316	<tr><td align="left" valign="middle">B=distance along axis from bottom upward; B=max(R,G,B); <em>intensity-like</em></td></tr>
				1317
				1318	<tr><th align="left" valign="middle">HSL — Hue, Saturation, Lightness; like a double cone end-to-end with peaks at very top and bottom</th></tr>
				1319	<tr><td align="left" valign="middle">H=angle around perimeter (0 to 360 deg); H=0 is red; increasing angles toward green</td></tr>
				1320	<tr><td align="left" valign="middle">S=distance from axis outward</td></tr>
				1321	<tr><td align="left" valign="middle">L=distance along axis from bottom upward; L=0.5max(R,G,B) + 0.5min(R,G,B); <em>intensity-like</em></td></tr>
				1322
				1323	<tr><th align="left" valign="middle">HWB — Hue, Whiteness, Blackness</th></tr>
				1324	<tr><td align="left" valign="middle">Hue (complicated equation)</td></tr>
				1325	<tr><td align="left" valign="middle">Whiteness (complicated equation)</td></tr>
				1326	<tr><td align="left" valign="middle">Blackness (complicated equation)</td></tr>
				1327
				1328	<tr><th align="left" valign="middle">LAB</th></tr>
				1329	<tr><td align="left" valign="middle">L (complicated equation relating X,Y,Z)</td></tr>
				1330	<tr><td align="left" valign="middle">A (complicated equation relating X,Y,Z)</td></tr>
				1331	<tr><td align="left" valign="middle">B (complicated equation relating X,Y,Z)</td></tr>
				1332
				1333	<tr><th align="left" valign="middle">LOG</th></tr>
				1334	<tr><td align="left" valign="middle">I1 (complicated equation involving logarithm of R)</td></tr>
				1335	<tr><td align="left" valign="middle">I2 (complicated equation involving logarithm of G)</td></tr>
				1336	<tr><td align="left" valign="middle">I3 (complicated equation involving logarithm of B)</td></tr>
				1337
				1338	<tr><th align="left" valign="middle">OHTA — approximates principal components transformation</th></tr>
				1339	<tr><td align="left" valign="middle">I1=0.33333R+0.33334G+0.33333*B; <em>intensity-like</em></td></tr>
				1340	<tr><td align="left" valign="middle">I2=(0.50000R+0.00000G−0.50000B)(<em class="QR">QuantumRange</em>+1)/2</td></tr>
				1341	<tr><td align="left" valign="middle">I3=(−0.25000R+0.50000G−0.25000B)(<em class="QR">QuantumRange</em>+1)/2</td></tr>
				1342
				1343	<tr><th align="left" valign="middle">Rec601Luma</th></tr>
				1344	<tr><td align="left" valign="middle">Gray = 0.29900R+0.58700G+0.11400*B</td></tr>
				1345
				1346	<tr><th align="left" valign="middle">Rec601YCbCr</th></tr>
				1347	<tr><td align="left" valign="middle">Y=0.299000R+0.587000G+0.114000*B; <em>intensity-like</em></td></tr>
				1348	<tr><td align="left" valign="middle">Cb=(−0.168736R-0.331264G+0.500000B)(<em class="QR">QuantumRange</em>+1)/2</td></tr>
				1349	<tr><td align="left" valign="middle">Cr=(0.500000R−0.418688G−0.081312B)(<em class="QR">QuantumRange</em>+1)/2</td></tr>
				1350
				1351	<tr><th align="left" valign="middle">Rec709Luma</th></tr>
				1352	<tr><td align="left" valign="middle">Gray=0.21260R+0.71520G+0.07220*B</td></tr>
				1353
				1354	<tr><th align="left" valign="middle">Rec709YCbCr</th></tr>
				1355	<tr><td align="left" valign="middle">Y=0.212600R+0.715200G+0.072200*B; <em>intensity-like</em></td></tr>
				1356	<tr><td align="left" valign="middle">Cb=(−0.114572R−0.385428G+0.500000B)(<em class="QR">QuantumRange</em>+1)/2</td></tr>
				1357	<tr><td align="left" valign="middle">Cr=(0.500000R−0.454153G−0.045847B)(<em class="QR">QuantumRange</em>+1)/2</td></tr>
				1358
				1359	<tr><th align="left" valign="middle">sRGB</th></tr>
cristy	f9a6c46	2011-04-24 14:01:11 +0000	[diff] [blame]	1360	<tr><td align="left" valign="middle">if Rs ≤ .04045 then Rs=R/12.92 else Rs=((R+.055)/1.055)^2.4</td></tr>
				1361	<tr><td align="left" valign="middle">if Gs ≤ .04045 then Gs=B/12.92 else Gs=((G+.055)/1.055)^2.4</td></tr>
				1362	<tr><td align="left" valign="middle">if Bs ≤ .04045 then Bs=B/12.92 else Bs=((B+.055)/1.055)^2.4</td></tr>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1363
				1364	<tr><th align="left" valign="middle">XYZ</th></tr>
				1365	<tr><td align="left" valign="middle">X=0.4124240R+0.3575790G+0.1804640*B</td></tr>
				1366	<tr><td align="left" valign="middle">Y=0.2126560R+0.7151580G+0.0721856*B</td></tr>
				1367	<tr><td align="left" valign="middle">Z=0.0193324R+0.1191930G+0.9504440*B</td></tr>
				1368
				1369	<tr><th align="left" valign="middle">YCC</th></tr>
				1370	<tr><td align="left" valign="middle">Y=(0.29900R+0.58700G+0.11400*B) (with complicated scaling); <em>intensity-like</em></td></tr>
				1371	<tr><td align="left" valign="middle">C1=(−0.29900R−0.58700G+0.88600*B) (with complicated scaling)</td></tr>
				1372	<tr><td align="left" valign="middle">C2=(0.70100R−0.58700G−0.11400*B) (with complicated scaling)</td></tr>
				1373
				1374	<tr><th align="left" valign="middle">YCbCr</th></tr>
				1375	<tr><td align="left" valign="middle">Y=0.299000R+0.587000G+0.114000*B; <em>intensity-like</em></td></tr>
				1376	<tr><td align="left" valign="middle">Cb=(−0.168736R−0.331264G+0.500000B)(<em class="QR">QuantumRange</em>+1)/2</td></tr>
				1377	<tr><td align="left" valign="middle">Cr=(0.500000R−0.418688G−0.081312B)(<em class="QR">QuantumRange</em>+1)/2</td></tr>
				1378
				1379	<tr><th align="left" valign="middle">YIQ</th></tr>
				1380	<tr><td align="left" valign="middle">Y=0.29900R+0.58700G+0.11400*B; <em>intensity-like</em></td></tr>
				1381	<tr><td align="left" valign="middle">I=(0.59600R−0.27400G−0.32200B)(<em class="QR">QuantumRange</em>+1)/2</td></tr>
				1382	<tr><td align="left" valign="middle">Q=(0.21100R−0.52300G+0.31200B)(<em class="QR">QuantumRange</em>+1)/2</td></tr>
				1383
				1384	<tr><th align="left" valign="middle">YPbPr</th></tr>
				1385	<tr><td align="left" valign="middle">Y=0.299000R+0.587000G+0.114000*B; <em>intensity-like</em></td></tr>
				1386	<tr><td align="left" valign="middle">Pb=(−0.168736R−0.331264G+0.500000B)(<em class="QR">QuantumRange</em>+1)/2</td></tr>
				1387	<tr><td align="left" valign="middle">Pr=(0.500000R−0.418688G−0.081312B)(<em class="QR">QuantumRange</em>+1)/2</td></tr>
				1388
				1389	<tr><th align="left" valign="middle">YUV</th></tr>
				1390	<tr><td align="left" valign="middle">Y=0.29900R+0.58700G+0.11400*B; <em>intensity-like</em></td></tr>
				1391	<tr><td align="left" valign="middle">U=(−0.14740R−0.28950G+0.43690B)(<em class="QR">QuantumRange</em>+1)/2</td></tr>
				1392	<tr><td align="left" valign="middle">V=(0.61500R−0.51500G−0.10000B)(<em class="QR">QuantumRange</em>+1)/2</td></tr>
				1393	</table>
				1394
				1395	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	1396	<h4><a id="combine"></a>-combine</h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1397	</div>
				1398
				1399	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Combine one or more images into a single image.</td><td style='text-align:right;'></td></tr></table>
				1400
				1401	<p>The channels (previously set by <a href="#channel">-channel</a>) of the combined image are taken from the grayscale values of each image in the sequence, in order. For the default -channel setting of <kbd>RGB</kbd>, this means the first image is assigned to the <kbd>Red</kbd> channel, the second to the <kbd>Green</kbd> channel, the third to the <kbd>Blue</kbd>.</p>
				1402
				1403	<p>This option can be thought of as the inverse to <a href="#separate">-separate</a>, so long as the channel settings are the same. Thus, in the following example, the final image should be a copy of the original.
				1404	</p>
				1405
cristy	4949d52	2010-03-12 18:41:34 +0000	[diff] [blame]	1406	<p class='crt'><span class="crtprompt"> $magick> </span><span class='crtin'>convert original.png -channel RGB -separate sepimage.png</span><span class='crtout'></span><span class="crtprompt"> $magick> </span><span class='crtin'>convert sepimage-0.png sepimage-1.png sepimage-2.png -channel RGB \ <br/> -combine imagecopy.png</span></p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1407	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	1408	<h4><a id="comment"></a>-comment <em class="arg">string</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1409	</div>
				1410
				1411	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Embed a comment in an image.</td><td style='text-align:right;'></td></tr></table>
				1412
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	1413	<p>This option sets the comment meta-data of an image read in after this
cristy	71a3f60	2010-09-15 12:38:16 +0000	[diff] [blame]	1414	option has been given. To modify a comment of images already in memory use
				1415	"<kbd><a href="#set">-set</a> comment</kbd>". </p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1416
cristy	71a3f60	2010-09-15 12:38:16 +0000	[diff] [blame]	1417	<p>The comment can contain special format characters listed in the <a
				1418	href="../www/escape.html">Format and
cristy	d0bd44a	2010-09-24 12:38:11 +0000	[diff] [blame]	1419	Print Image Properties</a>. These attributes are expanded when the comment
cristy	71a3f60	2010-09-15 12:38:16 +0000	[diff] [blame]	1420	is finally assigned to the individual images. </p>
				1421
				1422	<p>If the first character of <em class="arg">string</em> is <em
				1423	class="arg">@</em>, the image comment is read from a file titled by the
				1424	remaining characters in the string. Comments read in from a file are literal;
				1425	no embedded formatting characters are recognized.</p>
				1426
				1427	<p>Comment meta-data are not visible on the image itself. To do that use the
				1428	<a href="#annotate">-annotate</a> or <a href="#draw">-draw</a> options
				1429	instead.</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1430
				1431	<p>For example,</p>
				1432
				1433	<p class="crtsnip">
cristy	71a3f60	2010-09-15 12:38:16 +0000	[diff] [blame]	1434	-comment "%m:%f %wx%h" bird.miff
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1435	</p>
				1436
cristy	71a3f60	2010-09-15 12:38:16 +0000	[diff] [blame]	1437	<p>produces an image comment of <kbd>MIFF:bird.miff 512x480</kbd> (assuming
				1438	that the image <kbd>bird.miff</kbd> has a width of 512 and a height of
				1439	480.</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1440
				1441	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	1442	<h4><a id="compose"></a>-compose <em class="arg">operator</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1443	</div>
				1444
				1445	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Set the type of image composition.</td><td style='text-align:right;'></td></tr></table>
				1446
cristy	bc9539a	2010-08-16 18:06:20 +0000	[diff] [blame]	1447	<p>See <a href="../www/compose.html">Alpha Compositing</a> for
				1448	a detailed discussion of alpha compositing.</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1449
cristy	bc9539a	2010-08-16 18:06:20 +0000	[diff] [blame]	1450	<p>This setting effects image processing operators that merge two (or more)
				1451	images together in some way. This includes the operators,
				1452	<a href="#composite">-composite</a>,
				1453	<a href="#layers">-layers</a> composite,
				1454	<a href="#flatten">-flatten</a>,
				1455	<a href="#mosaic">-mosaic</a>,
				1456	<a href="#layers">-layers</a> merge,
				1457	<a href="#border">-border</a>,
				1458	<a href="#frame">-frame</a>,
				1459	and <a href="#extent">-extent</a>. </p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1460
cristy	bc9539a	2010-08-16 18:06:20 +0000	[diff] [blame]	1461	<p>It is also one of the primary options for the "<kbd>composite</kbd>"
				1462	command. </p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1463
				1464
				1465	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	1466	<h4><a id="composite"></a>-composite</h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1467	</div>
				1468
cristy	bc9539a	2010-08-16 18:06:20 +0000	[diff] [blame]	1469	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Perform alpha composition on two images and an optional mask</td><td style='text-align:right;'></td></tr></table>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1470
				1471	<p>Take the first image 'destination' and overlay the second 'source' image
				1472	according to the current <a href="#compose">-compose</a> setting. The location
				1473	of the 'source' or 'overlay' image is controlled according to <a
				1474	href="#geometry" >-geometry</a>, and <a href="#geometry" >-geometry</a>
				1475	settings. </p>
				1476
				1477	<p>If a third image is given this is treated as a gray-scale 'mask' image
				1478	relative to the first 'destination' image. This mask will limit what parts of
				1479	the destination can be modified by the image composition. However for the
				1480	'<kbd>displace</kbd>' compose method, the mask is used to provide a separate
				1481	Y-displacement image instead. </p>
				1482
				1483	<p>If a <a href="#compose">-compose</a> method requires extra numerical
				1484	arguments or flags these can be provided by setting the <a
				1485	href="#set">-set</a> '<kbd class="arg">option:compose:args</kbd>'
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	1486	appropriately for the compose method. </p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1487
				1488	<p>Some <a href="#compose">-compose</a> methods can modify the 'destination'
				1489	image outside the overlay area. You can disable this by setting the special <a
				1490	href="#set">-set</a> '<kbd class="arg">option:compose:outside-overlay</kbd>'
				1491	to '<kbd>false</kbd>'. </p>
				1492
				1493
				1494	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	1495	<h4><a id="compress"></a>-compress <em class="arg">type</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1496	</div>
				1497
				1498	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Use pixel compression specified by <em class="arg">type</em> when writing the image.</td><td style='text-align:right;'></td></tr></table>
				1499
				1500	<p>Choices are: <kbd class="arg">None</kbd>, <kbd class="arg">BZip</kbd>, <kbd class="arg">Fax</kbd>, <kbd class="arg">Group4</kbd>, <kbd class="arg">JPEG</kbd>, <kbd class="arg">JPEG2000</kbd>, <kbd class="arg">Lossless</kbd>, <kbd class="arg">LZW</kbd>, <kbd class="arg">RLE</kbd> or <kbd class="arg">Zip</kbd>.</p>
				1501
				1502	<p>To print a complete list of compression types, use <a href="#list">-list compress</a>.</p>
				1503
				1504	<p>Specify <a href="#compress">+compress</a> to store the binary image in an uncompressed format. The default is the compression type of the specified image file.</p>
				1505
				1506	<p>If <kbd>LZW</kbd> compression is specified but LZW compression has not been enabled, the image data is written in an uncompressed LZW format that can be read by LZW decoders. This may result in larger-than-expected GIF files.</p>
				1507
				1508	<p><kbd>Lossless</kbd> refers to lossless JPEG, which is only available if the JPEG library has been patched to support it. Use of lossless JPEG is generally not recommended.</p>
				1509
				1510	<p>Use the <a href="#quality">-quality</a> option to set the compression level to be used by JPEG, PNG, MIFF, and MPEG encoders. Use the <a href="#sampling-factor">-sampling-factor</a> option to set the sampling factor to be used by JPEG, MPEG, and YUV encoders for down-sampling the chroma channels.</p>
				1511
				1512	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	1513	<h4><a id="contrast"></a>-contrast</h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1514	</div>
				1515
				1516	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Enhance or reduce the image contrast.</td><td style='text-align:right;'></td></tr></table>
				1517
				1518	<p>This option enhances the intensity differences between the lighter and darker elements of the image. Use <a href="#contrast">-contrast</a> to enhance the image or <a href="#contrast">+contrast</a> to reduce the image contrast.</p>
				1519
				1520	<p>For a more pronounced effect you can repeat the option:</p>
				1521
				1522	<p class='crt'><span class="crtprompt"> $magick> </span><span class='crtin'>convert rose: -contrast -contrast rose_c2.png</span></p>
				1523	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	1524	<h4><a id="contrast-stretch"></a>-contrast-stretch <em class="arg">black-point</em><br />-contrast-stretch <em class="arg">black-point</em>{x<em class="arg">white-point</em>}{<em class="arg">%</em>}}</h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1525	</div>
				1526
				1527	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Increase the contrast in an image by <em>stretching</em> the range of intensity values.</td><td style='text-align:right;'></td></tr></table>
				1528
cristy	d934d10	2009-10-10 12:55:13 +0000	[diff] [blame]	1529	<p>While performing the stretch, black-out at most <em
				1530	class="arg" >black-point</em> pixels and white-out at most <em
				1531	class="arg" >white-point</em> pixels. Or, if percent is used, black-out at most
				1532	<em class="arg" >black-point %</em> pixels and white-out at most <em
				1533	class="arg" >white-point %</em> pixels.</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1534
cristy	d934d10	2009-10-10 12:55:13 +0000	[diff] [blame]	1535	<p>Prior to ImageMagick 6.4.7-0, <a href="#contrast-stretch"
				1536	>-contrast-stretch</a> will black-out at most <em class="arg"
				1537	>black-point</em> pixels and white-out at most <em class="arg" >total pixels
				1538	minus white-point</em> pixels. Or, if percent is used, black-out at most <em
				1539	class="arg">black-point %</em> pixels and white-out at most <em class="arg"
				1540	>100% minus white-point %</em> pixels.</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1541
cristy	d934d10	2009-10-10 12:55:13 +0000	[diff] [blame]	1542	<p>Note that <kbd>-contrast-stretch 0</kbd> will modify the image such that
				1543	the image's min and max values are stretched to 0 and <em class="QR"
				1544	>QuantumRange</em>, respectively, without any loss of data due to burn-out or
				1545	clipping at either end. This is not the same as <a href="#normalize"
cristy	d4d64ed	2010-08-22 22:19:33 +0000	[diff] [blame]	1546	>-normalize</a>, which is equivalent to <kbd>-contrast-stretch 0.15x0.05%</kbd> (or
cristy	d934d10	2009-10-10 12:55:13 +0000	[diff] [blame]	1547	prior to ImageMagick 6.4.7-0, <kbd>-contrast-stretch 2%x99%</kbd>).</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1548
cristy	d934d10	2009-10-10 12:55:13 +0000	[diff] [blame]	1549	<p>Internally operator works by creating a histogram bin, and then uses that
				1550	bin to modify the image. As such some colors may be merged together when they
				1551	originally fell into the same 'bin'. </p>
				1552
				1553	<p>All the channels are normalized in concert by the came amount so as to
				1554	preserve color integrity, when the default <a href="#channel" >+channel</a>
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	1555	setting is in use. Specifying any other <a href="#channel" >-channel</a>
cristy	d934d10	2009-10-10 12:55:13 +0000	[diff] [blame]	1556	setting will normalize the RGB channels independently.</p>
				1557
				1558	<p>See also <a href="#auto-level" >-auto-level</a> for a 'perfect'
				1559	normalization of mathematical images. </p>
				1560
				1561	<p>This operator is under review for re-development. </p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1562
				1563
				1564	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	1565	<h4><a id="convolve"></a>-convolve <em class="arg">kernel</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1566	</div>
				1567
				1568	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Convolve an image with a user-supplied convolution kernel.</td><td style='text-align:right;'></td></tr></table>
				1569
cristy	16ff93c	2010-01-13 23:18:07 +0000	[diff] [blame]	1570	<p>The <em class="arg">kernel</em> is a matrix specified as
cristy	d934d10	2009-10-10 12:55:13 +0000	[diff] [blame]	1571	a comma-separated list of integers (with no spaces), ordered left-to right,
				1572	starting with the top row. Presently, only odd-dimensioned kernels are
				1573	supported, and therefore the number of entries in the specified <em
				1574	class="arg">kernel</em> must be 3<sup>2</sup>=9, 5<sup>2</sup>=25,
				1575	7<sup>2</sup>=49, etc. </p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1576
cristy	d934d10	2009-10-10 12:55:13 +0000	[diff] [blame]	1577	<p>Note that the <a href="../www/command-line-options.html#convolve">‑convolve</a> operator supports the <a href="../www/command-line-options.html#bias">‑bias</a> setting. This option shifts the convolution so that
				1578	positive and negative results are relative to a user-specified bias value.
				1579	This is important for non-HDRI compilations of ImageMagick when dealing with
				1580	convolutions that contain negative as well as positive values. This is
				1581	especially the case with convolutions involving high pass filters or edge
				1582	detection. Without an output bias, the negative values is clipped at zero.
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1583	</p>
				1584
cristy	d934d10	2009-10-10 12:55:13 +0000	[diff] [blame]	1585	<p>When using an ImageMagick with the HDRI compile-time setting, <a href="../www/command-line-options.html#bias">‑bias</a> is not needed, as ImageMagick is able to store/handle any
				1586	negative results without clipping to the color value range (0..QuantumRange).
				1587	See the discussion on HDRI implementations of ImageMagick on the page <a
cristy	4777498	2011-02-15 15:17:19 +0000	[diff] [blame]	1588	href="../www/high-dynamic-range.html">High
cristy	d934d10	2009-10-10 12:55:13 +0000	[diff] [blame]	1589	Dynamic-Range Images</a>. For more about HDRI go the ImageMagick <a
				1590	href="http://www.imagemagick.org/Usage/basics/#hdri">Usage</a> pages or this
				1591	<a href="http://en.wikipedia.org/wiki/High_dynamic_range_imaging">Wikipedia</a>
				1592	entry. </p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1593
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1594
				1595	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	1596	<h4><a id="crop"></a>-crop <em class="arg">geometry</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1597	</div>
				1598
				1599	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Cut out one or more rectangular regions of the image.</td><td style='text-align:right;'></td></tr></table>
				1600
				1601	<p>See <a href="../www/command-line-processing.html#geometry">Image Geometry</a> for complete details about the <em class="arg">geometry</em> argument.</p>
				1602
				1603	<p>The <em class="arg">width</em> and <em class="arg">height</em> of the <em class="arg">geometry</em> argument give the size of the image that remains after cropping, and <em class="arg">x</em> and <em class="arg">y</em> in the <em class="arg">offset</em> (if present) gives the location of the top left corner of the cropped image with respect to the original image. To specify the amount to be removed, use <a href="#shave">-shave</a> instead.</p>
				1604
				1605	<p>If the <em class="arg">x</em> and <em class="arg">y</em> offsets are present, a single image is generated, consisting of the pixels from the cropping region. The offsets specify the location of the upper left corner of the cropping region measured downward and rightward with respect to the upper left corner of the image. If the <a href="#gravity">-gravity</a> option is present with <kbd>NorthEast</kbd>, <kbd>East</kbd>, or <kbd>SouthEast</kbd> gravity, it gives the distance leftward from the right edge of the image to the right edge of the cropping region. Similarly, if the <a href="#gravity">-gravity</a> option is present with <kbd>SouthWest</kbd>, <kbd>South</kbd>, or <kbd>SouthEast</kbd> gravity, the distance is measured upward between the bottom edges.</p>
				1606
				1607	<p>If the <em class="arg">x</em> and <em class="arg">y</em> offsets are omitted, a set of tiles of the specified geometry, covering the entire input image, is generated. The rightmost tiles and the bottom tiles are smaller if the specified geometry extends beyond the dimensions of the input image.</p>
				1608
				1609	<p>By adding a exclamation character flag to the geometry argument, the
				1610	cropped images virtual canvas page size and offset is set as if the
				1611	geometry argument was a viewport or window. This means the canvas page size
				1612	is set to exactly the same size you specified, the image offset set
				1613	relative top left corner of the region cropped. </p>
				1614
				1615	<p>If the cropped image 'missed' the actual image on its virtual canvas, a
				1616	special single pixel transparent 'missed' image is returned, and a 'crop
				1617	missed' warning given. </p>
				1618
cristy	739df91	2009-10-24 16:10:18 +0000	[diff] [blame]	1619	<p>It might be necessary to <a href="#repage" >+repage</a> the image prior to cropping the image to ensure the crop coordinate frame is relocated to the upper-left corner of the visible image.</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1620
				1621	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	1622	<h4><a id="cycle"></a>-cycle <em class="arg">amount</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1623	</div>
				1624
				1625	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>displace image colormap by amount.</td><td style='text-align:right;'></td></tr></table>
				1626
				1627	<p><em class="arg">Amount</em> defines the number of positions each
				1628	colormap entry is shifted.</p>
				1629
				1630
				1631	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	1632	<h4><a id="debug"></a>-debug <em class="arg">events</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1633	</div>
				1634
				1635	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>enable debug printout.</td><td style='text-align:right;'></td></tr></table>
				1636
				1637	<p>The <kbd>events</kbd> parameter specifies which events are to be logged. It can be either <kbd>None</kbd>, <kbd>All</kbd>, <kbd>Trace</kbd>, or a comma-separated list consisting of one or more of the following domains: <kbd>Annotate</kbd>, <kbd>Blob</kbd>, <kbd>Cache</kbd>, <kbd>Coder</kbd>, <kbd>Configure</kbd>, <kbd>Deprecate</kbd>, <kbd>Exception</kbd>, <kbd>Locale</kbd>, <kbd>Render</kbd>, <kbd>Resource</kbd>, <kbd>Security</kbd>, <kbd>TemporaryFile</kbd>, <kbd>Transform</kbd>, <kbd>X11</kbd>, or <kbd>User</kbd>. </p>
				1638
				1639
				1640	<p>For example, to log cache and blob events, use.</p>
				1641
				1642	<p class='crt'><span class="crtprompt"> $magick> </span><span class='crtin'>convert -debug "Cache,Blob" rose: rose.png</span></p>
				1643	<p>The <kbd>User</kbd> domain is normally empty, but developers can log user events in their private copy of ImageMagick.</p>
				1644
				1645	<p>To print the complete list of debug methods, use <a href="#list">-list debug</a>.</p>
				1646
				1647	<p>Use the <a href="#log">-log</a> option to specify the format for debugging output.</p>
				1648
				1649	<p>Use <a href="#debug">+debug</a> to turn off all logging.</p>
				1650
				1651	<p>Debugging may also be set using the <kbd>MAGICK_DEBUG</kbd> <a href="../www/resources.html#environment">environment variable</a>. The allowed values for the <kbd>MAGICK_DEBUG</kbd> environment variable are the same as for the <a href="#debug">-debug</a> option.</p>
				1652
				1653
				1654	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	1655	<h4><a id="decipher"></a>-decipher <em class="arg">filename</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1656	</div>
				1657
				1658	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Decipher and restore pixels that were previously transformed by <a href="#encipher">-encipher</a>.</td><td style='text-align:right;'></td></tr></table>
				1659
				1660	<p>Get the passphrase from the file specified by <em class="arg">filename</em>.</p>
				1661
				1662	<p>For more information, see the webpage, <a href="http://www.imagemagick.org/www/cipher.html">ImageMagick: Encipher or Decipher an Image</a>.</p>
				1663
				1664
				1665	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	1666	<h4><a id="deconstruct"></a>-deconstruct</h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1667	</div>
				1668
				1669	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>find areas that has changed between images </td><td style='text-align:right;'></td></tr></table>
				1670
				1671	<p>Given a sequence of images all the same size, such as produced by <a href="#coalesce">-coalesce</a>, replace the second and later images, with a smaller image of just the area that changed relative to the previous image. </p>
				1672
				1673	<p>The resulting sequence of images can be used to optimize an animation sequence, though will not work correctly for GIF animations when parts of the animation can go from opaque to transparent. </p>
				1674
				1675	<p>This option is actually equivalent to the <a href="#layers">-layers</a> method '<kbd>compare-any</kbd>'. </p>
				1676
				1677
				1678	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	1679	<h4><a id="define"></a>-define <em class="arg">key</em>{<em class="arg">=value</em>}<em class="arg">...</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1680	</div>
				1681
cristy	d0bd44a	2010-09-24 12:38:11 +0000	[diff] [blame]	1682	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>add specific global settings generally used to control
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	1683	coders and image processing operations.</td><td style='text-align:right;'></td></tr></table>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1684
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	1685	<p>This option creates one or more definitions for coders and decoders to use
				1686	while reading and writing image data. Definitions are generally used to
				1687	control image file format coder modules, and image processing operations,
				1688	beyond what is provided by normal means. Defined settings are listed in <a
				1689	href="#verbose" >-verbose</a> information ("<kbd>info:</kbd>" output format)
				1690	as "Artifacts". </p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1691
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	1692	<p>If <em class="arg">value</em> is missing for a definition, an empty-valued
				1693	definition of a flag is created with that name. This used to control on/off
				1694	options. Use <a href="#define">+define key</a> to remove definitions
				1695	previously created. Use <a href="#define">+define "*"</a> to remove all
				1696	existing definitions.</p>
				1697
cristy	d0bd44a	2010-09-24 12:38:11 +0000	[diff] [blame]	1698	<p>The same 'artifact' settings can also be defined using the <a
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	1699	href="#set" >-set "option:<em class="arg">key</em>" "<em class="arg"
cristy	d0bd44a	2010-09-24 12:38:11 +0000	[diff] [blame]	1700	>value</em>"</a> option, which also allows the use of <a href="../www/escape.html" >Format and Print Image
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	1701	Properties</a> in the defined value. </p>
				1702
cristy	efb2bdb	2010-11-20 19:35:22 +0000	[diff] [blame]	1703	<p>The <em>option</em> and <em>key</em> are case-independent (they are
				1704	converted to lowercase for use within the decoders) while the <em>value</em>
				1705	is case-dependent.</p>
				1706
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	1707	<p>Such settings are global in scope, and effect all images and operations. </p>
				1708
				1709	<p>The following definitions are just some of the artifacts that are
				1710	available:</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1711
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	1712	<dl>
cristy	045bd90	2010-01-30 18:56:24 +0000	[diff] [blame]	1713	<dt>dcm:display-range=reset</dt>
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	1714	<dd>Set the display range to the minimum and maximum pixel values for the
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	1715	DCM image format.</dd>
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	1716
cristy	045bd90	2010-01-30 18:56:24 +0000	[diff] [blame]	1717	<dt>dot:layout-engine=<em class="arg">value</em></dt>
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	1718	<dd>Set the specify the layout engine for the DOT image format (e.g.
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	1719	<kbd>neato</kbd>).</dd>
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	1720
cristy	045bd90	2010-01-30 18:56:24 +0000	[diff] [blame]	1721	<dt>jpeg:extent=<em class="arg">value</em></dt>
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	1722	<dd>Restrict the maximum JPEG file size, for example <kbd>-define
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	1723	jpeg:extent=400kb</kbd>.</dd>
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	1724
cristy	045bd90	2010-01-30 18:56:24 +0000	[diff] [blame]	1725	<dt>jpeg:size=<em class="arg">geometry</em></dt>
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	1726	<dd>Set the size hint of a JPEG image, for example, -define jpeg:size=128x128.
				1727	It is most useful for increasing performance and reducing the memory
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	1728	requirements when reducing the size of a large JPEG image.</dd>
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	1729
cristy	045bd90	2010-01-30 18:56:24 +0000	[diff] [blame]	1730	<dt>jp2:rate=<em class="arg">value</em></dt>
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	1731	<dd>Specify the compression factor to use while writing JPEG-2000 files. The
				1732	compression factor is the reciprocal of the compression ratio. The valid
				1733	range is 0.0 to 1.0, with 1.0 indicating lossless compression. If defined,
				1734	this value overrides the -quality setting. A quality setting of 75
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	1735	results in a rate value of 0.06641.</dd>
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	1736
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1737	<dt>mng:need-cacheoff</dt>
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	1738	<dd>turn playback caching off for streaming MNG.</dd>
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	1739
cristy	045bd90	2010-01-30 18:56:24 +0000	[diff] [blame]	1740	<dt>png:bit-depth=<em class="arg">value</em></dt>
				1741	<dt>png:color-type=<em class="arg">value</em></dt>
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	1742	<dd>desired bit-depth and color-type for PNG output. You can force the PNG
				1743	encoder to use a different bit-depth and color-type than it would have
				1744	normally selected, but only if this does not cause any loss of image
				1745	quality. Any attempt to reduce image quality is treated as an error and no
				1746	PNG file is written. E.g., if you have a 1-bit black-and-white image, you
				1747	can use these "defines" to cause it to be written as an 8-bit grayscale,
				1748	indexed, or even a 64-bit RGBA. But if you have a 16-million color image,
				1749	you cannot force it to be written as a grayscale or indexed PNG. If you
				1750	wish to do this, you must use the appropriate <a href="#depth">-depth</a>,
				1751	<a href="#colors">-colors</a>, or <a href="#type">-type</a> directives to
				1752	reduce the image quality prior to using the PNG encoder. Note that in
				1753	indexed PNG files, "bit-depth" refers to the number of bits per index,
cristy	efb2bdb	2010-11-20 19:35:22 +0000	[diff] [blame]	1754	which can be 1, 2, 4, or 8. In such files, the color samples always have
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	1755	8-bit depth.</dd>
				1756
cristy	a4dfb12	2011-07-07 19:01:57 +0000	[diff] [blame]	1757	<dt>png:compression-filter=<em class="arg">value</em></dt>
				1758	<dd> valid values are 0 through 7. 0-4 are the corresponding PNG filters,
				1759	5 means adaptive filtering except for images with a colormap, 6 means
				1760	adaptive filtering for all images, 7 means MNG "loco" compression.</dd>
				1761
cristy	87a7f07	2011-07-01 00:08:52 +0000	[diff] [blame]	1762	<dt>png:compression-level=<em class="arg">value</em></dt>
				1763	<dd> valid values are 0 through 9, with 0 providing the least but fastest
				1764	compression and 9 usually providing the best and always the slowest.</dd>
				1765
				1766	<dt>png:compression-strategy=<em class="arg">value</em></dt>
				1767	<dd> valid values are 0 through 4, meaning default, filtered, huffman_only,
cristy	a4dfb12	2011-07-07 19:01:57 +0000	[diff] [blame]	1768	rle, and fixed ZLIB compression strategy. If you are using an old zlib
				1769	that does not support Z_RLE (before 1.2.0) or Z_FIXED (before 1.2.2.2),
				1770	values 3 and 4, respectively, will use the zlib default strategy
				1771	instead.</dd>
cristy	87a7f07	2011-07-01 00:08:52 +0000	[diff] [blame]	1772
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	1773	<dt>png:exclude-chunk=<em class="arg">value</em></dt>
				1774	<dt>png:include-chunk=<em class="arg">value</em></dt>
				1775	<dd>ancillary chunks to be excluded from or included in PNG output.
				1776
				1777	<p>The<em class="arg">value</em> can be the name of a PNG chunk-type such
				1778	as <em class="arg">bKGD</em>, a comma-separated list of chunk-types,
				1779	or the word <em class="arg">all</em> or
				1780	the word <em class="arg">none</em>. There must be no spaces in the
				1781	list. Although PNG chunk-names are case-dependent, you can use
				1782	all lowercase names if you prefer.</p>
				1783
cristy	d241f44	2011-03-29 13:50:49 +0000	[diff] [blame]	1784	<p>The "include-chunk" and "exclude-chunk" lists only affect the behavior
				1785	of the PNG encoder and have no effect on the PNG decoder.</p>
				1786
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	1787	<p>As a special case, if the <kbd>sRGB</kbd> chunk is excluded and
				1788	the <kbd>gAMA</kbd> chunk is included, the <kbd>gAMA</kbd> chunk will
				1789	only be written if gamma is not 1/2.2, since most decoders assume
				1790	sRGB and gamma=1/2.2 when no colorspace information is included in
				1791	the PNG file. Because the list is processed from left to right, you
				1792	can achieve this with a single define:</p>
				1793
				1794	<pre class="text">
cristy	e9a32c3	2011-04-07 01:11:05 +0000	[diff] [blame]	1795	-define png:include-chunk=none,gAMA
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	1796	</pre>
				1797
				1798	<p>The critical PNG chunks <kbd>IHDR</kbd>, <kbd>PLTE</kbd>,
cristy	a4dfb12	2011-07-07 19:01:57 +0000	[diff] [blame]	1799	<kbd>IDAT</kbd>, and <kbd>IEND</kbd> cannot be excluded. Any such
				1800	entries appearing in the list will be ignored.</p>
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	1801
				1802	<p>If the ancillary PNG <kbd>tRNS</kbd> chunk is excluded and the
				1803	image has transparency, the PNG colortype is forced to be 4 or 6
				1804	(GRAY_ALPHA or RGBA). If the image is not transparent, then the
				1805	<kbd>tRNS</kbd> chunk isn't written anyhow, and there is no effect
				1806	on the PNG colortype of the output image.</p>
				1807
				1808	<p>The <a href="#strip">-strip</a> option does the equivalent of the
				1809	following for PNG output:</p>
				1810
				1811	<pre class="text">
cristy	e9a32c3	2011-04-07 01:11:05 +0000	[diff] [blame]	1812	-define png:include-chunk=none,gama
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	1813	</pre>
				1814
				1815	<p>The default behavior is to include all known PNG ancillary chunks
cristy	f796427	2011-01-30 03:49:12 +0000	[diff] [blame]	1816	plus ImageMagick's private <kbd>vpAg</kbd> ("virtual page") chunk,
				1817	and to exclude all PNG chunks that are unknown to ImageMagick,
				1818	regardless of their PNG "copy-safe" status as described in the
				1819	PNG specification.</p>
cristy	d241f44	2011-03-29 13:50:49 +0000	[diff] [blame]	1820
				1821	<p>Any chunk names that are not known to ImageMagick are ignored
				1822	if they appear in either the "include-chunk" or "exclude-chunk" list.
				1823	The ancillary chunks currently known to ImageMagick are
				1824	<kbd>bKGD</kbd>, <kbd>cHRM</kbd>, <kbd>gAMA</kbd>, <kbd>iCCP</kbd>,
				1825	<kbd>oFFs</kbd>, <kbd>pHYs</kbd>, <kbd>sRGB</kbd>, <kbd>tEXt</kbd>,
				1826	<kbd>tRNS</kbd>, <kbd>vpAg</kbd>, and <kbd>zTXt</kbd>.</p>
				1827
cristy	f9a6c46	2011-04-24 14:01:11 +0000	[diff] [blame]	1828	<p>You can also put <kbd>date</kbd> in the list to include or exclude
				1829	the "Date:create" and "Date:modify" text chunks that ImageMagick normally
				1830	inserts in the output PNG.</p>
				1831
				1832	</dd>
				1833
				1834	<dt>png:preserve-colormap</dt>
				1835	<dd>Use the existing image->colormap. Normally the PNG encoder will
				1836	try to optimize the palette, eliminating unused entries and putting
				1837	the transparent colors first. If this flag is set, that behavior
				1838	is suppressed.</dd>
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	1839
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1840	<dt>ps:imagemask</dt>
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	1841	<dd>If the ps:imagemask flag is defined, the PS3 and EPS3 coders will create
				1842	Postscript files that render bilevel images with the Postscript imagemask
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	1843	operator instead of the image operator.</dd>
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	1844
cristy	045bd90	2010-01-30 18:56:24 +0000	[diff] [blame]	1845	<dt>quantum:format=<em class="arg">type</em></dt>
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	1846	<dd>Set the type to <kbd>floating-point</kbd> to specify a floating-point
				1847	format for raw files (e.g. GRAY:) or for MIFF and TIFF images in HDRI mode
				1848	to preserve negative values. If <a href="#depth">-depth</a> 16 is
cristy	d0bd44a	2010-09-24 12:38:11 +0000	[diff] [blame]	1849	included, the result is a single precision floating point format.
				1850	If <a href="#depth">-depth</a> 32 is included, the result is
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	1851	double precision floating point format.</dd>
				1852
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	1853	</dl>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1854
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	1855	<p>For example, to create a postscript file that will render only the black
				1856	pixels of a bilevel image, use:</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1857
				1858	<p class='crt'><span class="crtprompt"> $magick> </span><span class='crtin'>convert bilevel.tif -define ps:imagemask eps3:stencil.ps</span></p>
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	1859	<p>Set attributes of the image registry by prefixing the value with
				1860	<kbd>registry:</kbd>. For example, to set a temporary path to put work files,
				1861	use:</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1862
				1863	<p class="crtsnip">
				1864	-define registry:temporary-path=/data/tmp
				1865	</p>
				1866
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	1867
				1868
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1869	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	1870	<h4><a id="delay"></a>-delay <em class="arg">ticks</em> <br />-delay <em class="arg">ticks</em>x<em class="arg">ticks-per-second</em> {<em class="arg"><</em>} {<em class="arg">></em>}</h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1871	</div>
				1872
				1873	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>display the next image after pausing.</td><td style='text-align:right;'></td></tr></table>
				1874
				1875	<p>This option is useful for regulating the animation of image sequences <em>ticks/ticks-per-second</em> seconds must expire before the display of the next image. The default is no delay between each showing of the image sequence. The default ticks-per-second is 100.</p>
				1876
				1877	<p>Use <kbd>></kbd> to change the image delay <em>only</em> if its current value exceeds the given delay. <kbd><</kbd> changes the image delay <em>only</em> if current value is less than the given delay. For example, if you specify <kbd>30></kbd> and the image delay is 20, the image delay does not change. However, if the image delay is 40 or 50, the delay it is changed to 30. Enclose the given delay in quotation marks to prevent the <kbd><</kbd> or <kbd>></kbd> from being interpreted by your shell as a file redirection.</p>
				1878
				1879
				1880	<div style="margin: auto;">
cristy	323f35b	2011-03-24 23:05:13 +0000	[diff] [blame]	1881	<h4><a id="delete"></a>-delete <em class="arg">indexes</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1882	</div>
				1883
				1884	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>delete the image, specified by its index, from the image sequence.</td><td style='text-align:right;'></td></tr></table>
				1885
				1886	<p>Specify the image by its index in the sequence. The first image is index 0. Negative indexes are relative to the end of the sequence, for example, -1 represents the last image of the sequence. Specify a range of images with a dash (e.g. 0-4). Separate indexes with a comma (e.g. 0,2). Use <kbd>+delete</kbd> to delete the last image in the current image sequence.</p>
				1887
				1888
				1889	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	1890	<h4><a id="density"></a>-density <em class="arg">width</em><br />-density <em class="arg">width</em>x<em class="arg">height</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1891	</div>
				1892
				1893	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Set the horizontal and vertical resolution of an image for rendering to devices.</td><td style='text-align:right;'></td></tr></table>
				1894
				1895	<p>This option specifies the image resolution to store while encoding a raster image or the canvas resolution while rendering (reading) vector formats such as Postscript, PDF, WMF, and SVG into a raster image. Image resolution provides the unit of measure to apply when rendering to an output device or raster image. The default unit of measure is in dots per inch (DPI). The <a href="#units">-units</a> option may be used to select dots per centimeter instead.</p>
				1896
				1897	<p>The default resolution is 72 dots per inch, which is equivalent to one point per pixel (Macintosh and Postscript standard). Computer screens are normally 72 or 96 dots per inch, while printers typically support 150, 300, 600, or 1200 dots per inch. To determine the resolution of your display, use a ruler to measure the width of your screen in inches, and divide by the number of horizontal pixels (1024 on a 1024x768 display).</p>
				1898
				1899	<p>If the file format supports it, this option may be used to update the stored image resolution. Note that Photoshop stores and obtains image resolution from a proprietary embedded profile. If this profile is not stripped from the image, then Photoshop will continue to treat the image using its former resolution, ignoring the image resolution specified in the standard file header.</p>
				1900
				1901	<p>The <a href="#density">-density</a> option sets an <em>attribute</em> and does not alter the underlying raster image. It may be used to adjust the rendered size for desktop publishing purposes by adjusting the scale applied to the pixels. To resize the image so that it is the same size at a different resolution, use the <a href="#resample">-resample</a> option.</p>
				1902
				1903	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	1904	<h4><a id="depth"></a>-depth <em class="arg">value</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1905	</div>
				1906
				1907	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>depth of the image.</td><td style='text-align:right;'></td></tr></table>
				1908
				1909	<p>This the number of bits in a color sample within a pixel. Use this option to specify the depth of raw images whose depth is unknown such as GRAY, RGB, or CMYK, or to change the depth of any image after it has been read.</p>
				1910
				1911	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	1912	<h4><a id="descend"></a>-descend</h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1913	</div>
				1914
				1915	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>obtain image by descending window hierarchy.</td><td style='text-align:right;'></td></tr></table>
				1916
				1917	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	1918	<h4><a id="deskew"></a>-deskew <em class="arg">threshold</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1919	</div>
				1920
				1921	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>straighten an image. A threshold of 40% works for most images.</td><td style='text-align:right;'></td></tr></table>
				1922
				1923	<p>Use <a href="#set">-set</a> <kbd>option:deskew:auto-crop <em>width</em></kbd> to auto crop the image. The set argument is the pixel width of the image background (e.g 40).</p>
				1924
				1925	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	1926	<h4><a id="despeckle"></a>-despeckle</h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1927	</div>
				1928
				1929	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>reduce the speckles within an image.</td><td style='text-align:right;'></td></tr></table>
				1930
				1931	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	1932	<h4><a id="direction"></a>-direction <em class="arg">type</em></h4>
cristy	2c83960	2010-04-03 02:32:08 +0000	[diff] [blame]	1933	</div>
				1934
				1935	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>render text right-to-left or left-to-right.</td><td style='text-align:right;'></td></tr></table>
				1936
				1937	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	1938	<h4><a id="displace"></a>-displace <em class="arg">horizontal-scale</em><br />-displace <em class="arg">horizontal-scale</em>x<em class="arg">vertical-scale</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1939	</div>
				1940
				1941	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>shift image pixels as defined by a displacement map.</td><td style='text-align:right;'>[<a href="../www/composite.html">composite</a>]</td></tr></table>
				1942
				1943	<p>With this option, the 'overlay' image, and optionally the 'mask' image,
cristy	d0bd44a	2010-09-24 12:38:11 +0000	[diff] [blame]	1944	is used as a displacement map, which is used to displace the lookup of
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1945	what part of the 'background' image is seen at each point of the overlaid
				1946	area. Much like the displacement map is a 'lens' that redirects light shining
				1947	through it so as to present a distorted view the original 'background' image
				1948	behind it. </p>
				1949
				1950	<p>Any perfect grey areas of the displacement map produce a zero
				1951	displacement of the image. Black areas produce the given maximum negative
				1952	displacement of the lookup point, while white produce a maximum positive
				1953	displacement of the lookup. </p>
				1954
				1955	<p>Note that it is the lookup of the 'background' that is displaced, not a
				1956	displacement of the image itself. As such an area of the displacement map
				1957	containing 'white' will have the lookup point 'shifted' by a positive amount,
				1958	and thus generating a copy of the destination image to the right/downward from
				1959	the correct position. That is the image will look like it may have been
				1960	'shifted' in a negative left/upward direction. Understanding this is a very
				1961	important in understanding how displacement maps work. </p>
				1962
				1963	<p>The given arguments define the maximum amount of displacement in pixels
				1964	that a particular map can produce. If the displacement scale is large enough
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	1965	it is also possible to lookup parts of the 'background' image that lie well
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1966	outside the bounds of the displacement map itself. That is you could very
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	1967	easily copy a section of the original image from outside the overlay area
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1968	into the overlay area. </p>
				1969
				1970	<p>The '%' flag makes the displacement scale relative to the size of the
				1971	overlay image (100% = half width/height of image). Using '!' switches
				1972	percentage arguments to refer to the destination image size instead.
				1973	these flags were added as of IM v6.5.3-5.</p>
				1974
				1975	<p>Normally a single grayscale displacement map is provided, which with the
				1976	given scaling values will determine a single direction (vector) in which
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	1977	displacements can occur (positively or negatively). However, if you also
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1978	specify a third image which is normally used as a <em class="arg">mask</em>,
cristy	d0bd44a	2010-09-24 12:38:11 +0000	[diff] [blame]	1979	the <em class="arg">composite image</em> is used for horizontal X
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1980	displacement, while the <em class="arg">mask image</em> is used for vertical Y
				1981	displacement. This allows you to define completely different displacement
				1982	values for the X and Y directions, and allowing you to lookup any point within
				1983	the <em class="arg">scale</em> bounds. In other words each pixel can lookup
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	1984	any other nearby pixel, producing complex 2 dimensional displacements, rather
				1985	than a simple 1 dimensional vector displacements. </p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1986
cristy	a4dfb12	2011-07-07 19:01:57 +0000	[diff] [blame]	1987	<p>Alteratively rather than supplying two separate images, as of IM v6.4.4-0,
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1988	you can use the 'red' channel of the overlay image to specify the horizontal
				1989	or X displacement, and the 'green' channel for the vertical or Y displacement.
				1990	</p>
				1991
cristy	d0bd44a	2010-09-24 12:38:11 +0000	[diff] [blame]	1992	<p>As of IM v6.5.3-5 any alpha channel in the overlay image is used as a
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1993	mask the transparency of the destination image. However areas outside the
				1994	overlaid areas will not be effected. </p>
				1995
				1996
				1997	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	1998	<h4><a id="display"></a>-display <em class="arg">host:display[.screen]</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	1999	</div>
				2000
				2001	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Specifies the X server to contact.</td><td style='text-align:right;'>[<a href="../www/animate.html">animate</a>, <a href="../www/display.html">display</a>]</td></tr></table>
				2002
				2003	<p>This option is used with convert for obtaining image or font from this X server. See <em class="arg">X(1)</em>.</p>
				2004
				2005	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	2006	<h4><a id="dispose"></a>-dispose <em class="arg">method</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	2007	</div>
				2008
				2009	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>define the GIF disposal image setting for images that are being created or read in. </td><td style='text-align:right;'></td></tr></table>
				2010
				2011	<p>The layer disposal method defines the way each the displayed image is to be
				2012	modified after the current 'frame' of an animation has finished being
				2013	displayed (after its 'delay' period), but before the next frame on an
				2014	animation is to be overlaid onto the display. </p>
				2015
				2016	<p>Here are the valid methods:</p>
				2017
				2018	<pre class="text">
cristy	e9a32c3	2011-04-07 01:11:05 +0000	[diff] [blame]	2019	Undefined 0 No disposal specified (equivalent to '<kbd>none</kbd>').
				2020	None 1 Do not dispose, just overlay next frame image.
				2021	Background 2 Clear the frame area with the background color.
				2022	Previous 3 Clear to the image prior to this frames overlay.
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	2023	</pre>
				2024
				2025	<p>You can also use the numbers given above, which is what the GIF format
				2026	uses internally to represent the above settings. </p>
				2027
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	2028	<p>To print a complete list of dispose methods, use <a href="#list">-list dispose</a>.</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	2029
				2030	<p>Use <a href="#dispose" >+dispose</a>, turn off the setting and prevent
				2031	resetting the layer disposal methods of images being read in. </p>
				2032
				2033	<p>Use <a href="#set">-set</a> '<kbd>dispose</kbd>' method to set the image
				2034	disposal method for images already in memory.</p>
				2035
				2036	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	2037	<h4><a id="dissimilarity-threshold"></a>-dissimilarity-threshold <em class="arg">value</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	2038	</div>
				2039
				2040	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>maximum RMSE for subimage match (default 0.2).</td><td style='text-align:right;'>[<a href="../www/compare.html">compare</a>]</td></tr></table>
				2041
				2042
				2043	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	2044	<h4><a id="dissolve"></a>-dissolve <em class="arg">src_percent</em>[x<em class="arg">dst_percent</em>]</h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	2045	</div>
				2046
				2047	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>dissolve an image into another by the given percent.</td><td style='text-align:right;'>[<a href="../www/composite.html">composite</a>]</td></tr></table>
				2048
				2049	<p>The opacity of the composite image is multiplied by the given percent, then
				2050	it is composited 'over' the main image. If <em class="arg">src_percent</em>
cristy	d0bd44a	2010-09-24 12:38:11 +0000	[diff] [blame]	2051	is greater than 100, start dissolving the main image so it becomes
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	2052	transparent at a value of '<kbd class="arg">200</kbd>'. If both percentages
				2053	are given, each image are dissolved to the percentages given. </p>
				2054
				2055	<p>Note that dissolve percentages do not add, two opaque images dissolved
				2056	'50,50', produce a 75% transparency. For a 50% + 50% blending of the two
				2057	images, you would need to use dissolve values of '50,100'. </p>
				2058
				2059	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	2060	<h4><a id="distort"></a>-distort <em class="arg">method arguments</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	2061	</div>
				2062
				2063	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>distort an image, using the given <em class="arg">method</em> and its required <em class="arg">arguments</em>.</td><td style='text-align:right;'></td></tr></table>
				2064
				2065	<p>The <em class="arg">arguments</em> is a single string containing a list
				2066	of floating point numbers separated by commas or spaces. The number of
				2067	and meaning of the floating point values depends on the distortion <em
				2068	class="arg">method</em> being used. </p>
				2069
				2070	<p>Choose from these distortion types:</p>
				2071
				2072	<table class="doc">
				2073	<tr valign="top">
				2074	<th align="left" style="width: 8%">Method</th>
				2075	<th align="left">Description</th>
				2076	</tr>
				2077
				2078	<tr valign="top">
				2079	<td valign="top"><kbd>ScaleRotateTranslate</kbd>
				2080	<br/>or   <kbd>SRT</kbd></td>
				2081	<td valign="top">
				2082	Distort image by first scaling and rotating about a given 'center',
				2083	before translating that 'center' to the new location, in that order. It
				2084	is an alternative method of specifying a '<kbd>Affine</kbd>' type of
				2085	distortion, but without shearing effects. It also provides a good way
				2086	of rotating and displacing a smaller image for tiling onto a larger
				2087	background (IE 2-dimensional animations). <br/>
				2088
				2089	The number of arguments determine the specific meaning of each
				2090	argument for the scales, rotation, and translation operations. <br/>
				2091
				2092	<table style="margin-left:auto; margin-right:auto;">
				2093	<tr><td>#  </td><td>arguments meaning</td></tr>
				2094	<tr><td>1:</td><td><em>Angle_of_Rotation</em></td></tr>
				2095	<tr><td>2:</td><td><em>Scale   Angle</em></td></tr>
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	2096	<tr><td>3:</td><td><em>X,Y     Angle</em></td></tr>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	2097	<tr><td>4:</td><td><em>X,Y   Scale   Angle</em></td></tr>
				2098	<tr><td>5:</td>
				2099	<td><em>X,Y   ScaleX,ScaleY   Angle</em></td></tr>
				2100	<tr><td>6:</td>
				2101	<td><em>X,Y   Scale   Angle   NewX,NewY</em></td></tr>
				2102	<tr><td>7:</td>
				2103	<td><em>X,Y   ScaleX,ScaleY   Angle
				2104	NewX,NewY</em></td></tr>
				2105	</table>
				2106
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	2107	This is actually an alternative way of specifying a 2 dimensional linear
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	2108	'<kbd>Affine</kbd>' or '<kbd>AffineProjection</kbd>' distortion. </td> </tr>
				2109
				2110	<tr valign="top">
				2111	<td valign="top"><kbd>Affine</kbd></td>
				2112	<td valign="top">
				2113	Distort the image linearly by moving a list of at least 3 or more sets
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	2114	of control points (as defined below). Ideally 3 sets or 12 floating
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	2115	point values are given allowing the image to be linearly scaled,
				2116	rotated, sheared, and translated, according to those three points. See
				2117	also the related '<kbd>AffineProjection</kbd>' and '<kbd>SRT</kbd>'
				2118	distortions. <br/>
				2119
				2120	More than 3 sets given control point pairs (12 numbers) is least
				2121	squares fitted to best match a lineary affine distortion. If only 2
				2122	control point pairs (8 numbers) are given a two point image translation
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	2123	rotation and scaling is performed, without any possible shearing,
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	2124	flipping or changes in aspect ratio to the resulting image. If only one
				2125	control point pair is provides the image is only translated, (which may
				2126	be a floating point non-integer translation). <br/>
				2127
				2128	This distortion does not include any form of perspective distortion.
				2129	</td>
				2130
				2131	</tr>
				2132
				2133	<tr valign="top">
				2134	<td valign="top"><kbd>AffineProjection</kbd></td>
				2135	<td valign="top">
				2136	Linearly distort an image using the given Affine Matrix of 6
				2137	pre-calculated coefficients forming a set of Affine Equations to map
				2138	the source image to the destination image.
				2139
				2140	<div style="text-align: center"><em>
				2141	s<sub>x</sub>, r<sub>x</sub>,
				2142	r<sub>y</sub>, s<sub>y</sub>,
				2143	t<sub>x</sub>, t<sub>y</sub>
				2144	</em></div>
				2145
				2146	See <a href="#affine" >-affine</a> setting for more detail, and
				2147	meanings of these coefficients. <br/>
				2148
				2149	The distortions '<kbd>Affine</kbd>' and '<kbd>SRT</kbd>' provide
cristy	d0bd44a	2010-09-24 12:38:11 +0000	[diff] [blame]	2150	alternative methods of defining this distortion, with ImageMagick doing
				2151	the calculations needed to generate the required coefficients. You can
				2152	see the internally generated coefficients, by using a <a
				2153	href="#verbose" >-verbose</a> setting with those other varients. </td>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	2154
				2155	</tr>
				2156
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	2157	<tr valign="top">
cristy	d0bd44a	2010-09-24 12:38:11 +0000	[diff] [blame]	2158	<td valign="top"><kbd>BilinearForward</kbd><br/>
				2159	<kbd>BilinearReverse</kbd></td>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	2160	<td valign="top">
cristy	d0bd44a	2010-09-24 12:38:11 +0000	[diff] [blame]	2161	Bilinear Distortion, given a minimum of 4 sets of coordinate pairs, or
				2162	16 values (see below). Not that lines may not appear straight after
				2163	distortion, though the distance between coordinates will remain
				2164	consistent. <br/>
				2165
				2166	The '<kbd>BilinearForward</kbd>' is used to map rectangles to any
				2167	quadrilateral, while the '<kbd>BilinearReverse</kbd>' form maps any
				2168	quadrilateral to a rectangle, while preserving the straigth line edges
				2169	in each case. <br/>
				2170
				2171	Note that '<kbd>BilinearForward</kbd>' can generate invalid pixels
				2172	which will be colored using the <a href="#mattecolor" >-mattecolor</a>
				2173	color setting. Also if the quadraterial becomes 'flipped' the image
				2174	may dissappear. <br/>
				2175
				2176	There are future plans to produce a true Bilinear distortion that will
				2177	attempt to map any quadrilateral to any other quadrilateral, while
				2178	preserving edges (and edge distance ratios).
				2179
				2180	</td>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	2181	</tr>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	2182
				2183	<tr valign="top">
				2184	<td valign="top"><kbd>Perspective</kbd></td>
				2185	<td valign="top">
				2186	Perspective distort the images, using a list of 4 or more sets of
				2187	control points (as defined below). More that 4 sets (16 numbers) of
				2188	control points provide least squares fitting for more accurate
				2189	distortions (for the purposes of image registration and panarama
				2190	effects). Less than 4 sets will fall back to a '<kbd>Affine</kbd>'
				2191	linear distortion. <br/>
				2192
				2193	Perspective Distorted images ensures that straight lines remain
				2194	straight, but the scale of the distorted image will vary. The horizon
				2195	is anti-aliased, and the 'sky' color may be set using the
				2196	<a href="#mattecolor" >-mattecolor</a> setting. </td>
				2197	</tr>
				2198
				2199	<tr valign="top">
				2200	<td valign="top"><kbd>PerspectiveProjection</kbd>  </td>
				2201	<td valign="top">
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	2202	Do a '<kbd>Perspective</kbd>' distortion biased on a set of 8
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	2203	pre-calculated coefficients. You can get these coefficients by looking
				2204	at the <a href="#verbose" >-verbose</a> output of a
				2205	'<kbd>Prespective</kbd>' distortion, or by calculating them yourself.
				2206	If the last two perspective scaling coefficients are zero, the
				2207	remaining 6 represents a transposed 'Affine Matrix'. </td>
				2208
				2209	</tr>
				2210
				2211	<tr valign="top">
				2212	<td valign="top"><kbd>Arc</kbd></td>
				2213	<td valign="top">
				2214	Arc the image (variation of polar mapping) over the angle given around
				2215	a circle. <br/>
				2216	<table width="90%" style = "margin-left: auto; margin-right: auto;">
				2217	<tr valign="top"><td>Argument</td>
				2218	<td>Meaning</td></tr>
				2219	<tr valign="top"><td><em>arc_angle</em></td>
				2220	<td>The angle over which to arc the image side-to-side</td></tr>
				2221	<tr valign="top"><td><em>rotate_angle</em></td>
				2222	<td>Angle to rotate resulting image from vertical center</td></tr>
				2223	<tr valign="top"><td><em>top_radius</em></td>
				2224	<td>Set top edge of source image at this radius</td></tr>
				2225	<tr valign="top"><td><em>bottom_radius</em> </td>
				2226	<td>Set bottom edge to this radius (radial scaling)</td></tr>
				2227	</table>
				2228
				2229	The resulting image is always resized to best fit the resulting image,
				2230	(as if using <a href="#distort" >+distort</a>) while attempting to
				2231	preserve scale and aspect ratio of the original image as much as
				2232	possible with the arguments given by the user. All four arguments will
				2233	be needed to change the overall aspect ratio of an 'Arc'ed image. <br/>
				2234
				2235	This a variation of a polar distortion designed to try to preserve the
				2236	aspect ratio of the image rather than direct Cartesian to Polar
				2237	conversion. </td>
				2238	</tr>
				2239
				2240	<tr valign="top">
				2241	<td valign="top"><kbd>Polar</kbd></td>
				2242	<td valign="top">
				2243	Like '<kbd>Arc</kbd>' but do a complete Cartesian to Polar mapping of
				2244	the image. that is the height of the input image is mapped to the
				2245	radius limits, while the width is wrapped around between the
				2246	angle limits. <br/>
				2247
				2248	Arguments: <em>Rmax,Rmin CenterX,CenterY, start,end_angle</em> <br/>
				2249
				2250	All arguments are optional. With <em>Rmin</em> defaulting to zero, the
				2251	center to the center of the image, and the angles going from -180 (top)
				2252	to +180 (top). If <em>Rmax</em> is given the special value of
				2253	'<code>0</code>', the the distance from the center to the nearest edge
				2254	is used for the radius of the output image, which will ensure the whole
				2255	image is visible (though scaled smaller). However a special value of
				2256	'<code>-1</code>' will use the distance from the center to the furthest
				2257	corner, This may 'clip' the corners from the input rectangular image,
				2258	but will generate the exact reverse of a '<kbd>DePolar</kbd>' with
				2259	the same arguments. <br/>
				2260
				2261	If the plus form of distort (<a href="#distort" >+distort</a>) is used
				2262	output image center will default to <code>0,0</code> of the virtual
				2263	canvas, and the image size adjusted to ensure the whole input image is
				2264	made visible in the output image on the virtual canvas. </td>
				2265
				2266	</tr>
				2267
				2268	<tr valign="top">
				2269	<td valign="top"><kbd>DePolar</kbd></td>
				2270	<td valign="top">
				2271	Uses the same arguments and meanings as a '<kbd>Polar</kbd>' distortion
				2272	but generates the reverse Polar to Cartesian distortion. <br/>
				2273
				2274	The special <em>Rmax</em> setting of '<code>0</code>' may however clip
				2275	the corners of the input image. However using the special
				2276	<em>Rmax</em> setting of '<code>-1</code>' (maximum center to corner
				2277	distance) will ensure the whole distorted image is preserved in the
				2278	generated result, so that the same argument to '<kbd>Polar</kbd>' will
				2279	reverse the distortion re-producing the original.
				2280
				2281	Note that as this distortion requires the area resampling of a circular
				2282	arc, which can not be handled by the builtin EWA resampling function.
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	2283	As such the normal EWA filters are turned off. It is recommended some
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	2284	form of 'super-sampling' image processing technique be used to produce
				2285	a high quality result. </td>
				2286
				2287	</tr>
				2288
				2289	<tr valign="top">
				2290	<td valign="top"><kbd>Barrel</kbd></td>
				2291	<td valign="top">
				2292	Given the four coefficients (A,B,C,D) as defined by <a
cristy	6bcf48e	2011-02-15 19:09:04 +0000	[diff] [blame]	2293	href="http://wiki.panotools.org/Lens_correction_model" >Helmut
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	2294	Dersch</a>, perform a barrell or pin-cushion distortion appropriate to
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	2295	correct radial lens distortions. That is in photographs, make straight
				2296	lines straight again. <br/>
				2297
				2298	Arguments: <em>A   B   C</em>   [ <em>D</em>   [
				2299	<em>X</em> , <em>Y</em> ] ] <br/>
				2300	or <em>A<sub>x</sub> B<sub>x</sub> C<sub>x</sub> D<sub>x</sub>
				2301	A<sub>y</sub> B<sub>y</sub> C<sub>y</sub> D<sub>y</sub></em>
				2302	[ <em>X</em> , <em>Y</em> ] <br/>
				2303	So that it forms the function <br/>
				2304	Rsrc = r * ( <em>A</em>r<sup>3</sup> + <em>B</em>r<sup>2</sup> +
				2305	<em>C</em>*r + <em>D</em> )<br/>
				2306
				2307	Where <em>X</em>,<em>Y</em> is the optional center of the distortion
				2308	(defaulting to the center of the image). <br/>
				2309	The second form is typically used to distort images, rather than
				2310	correct lens distortions. <br/>
				2311	</td>
				2312
				2313	</tr>
				2314
				2315	<tr valign="top">
				2316	<td valign="top"><kbd>BarrelInverse</kbd></td>
				2317	<td valign="top">
				2318	This is very simular to '<kbd>Barrel</kbd>' with the same set of
				2319	arguments, and argument handling. However it uses the inverse
				2320	of the radial polynomial,
				2321	so that it forms the function <br/>
				2322	Rsrc = r / ( <em>A</em>r<sup>3</sup> + <em>B</em>r<sup>2</sup> +
cristy	d0bd44a	2010-09-24 12:38:11 +0000	[diff] [blame]	2323	<em>C</em>*r + <em>D</em> )<br/>
				2324	Note that this is not the reverse of the '<kbd>Barrel</kbd>'
				2325	distortion, just a different barrel-like radial distortion method.
				2326
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	2327	</td>
				2328	</tr>
				2329
				2330	<tr valign="top">
				2331	<td valign="top"><kbd>Shepards</kbd></td>
				2332	<td valign="top">
				2333	Distort the given list control points (any number) using an Inverse
				2334	Squared Distance Interpolation Method (<a
cristy	d0bd44a	2010-09-24 12:38:11 +0000	[diff] [blame]	2335	href="http://en.wikipedia.org/wiki/Shepard%27s_method" >Shepards
				2336	Method</a>). The control points in effect do 'localized' displacement
				2337	of the image around the given control point (preserving the look and
				2338	the rotation of the area near the control points. For best results
				2339	extra control points should be added to 'lock' the positions of the
				2340	corners, edges and other unchanging parts of the image, to prevent
				2341	their movement. <br/>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	2342
cristy	d0bd44a	2010-09-24 12:38:11 +0000	[diff] [blame]	2343	The distortion has been likened to 'taffy pulling' using nails, or
				2344	pins' stuck in a block of 'jelly' which is then moved to the new
				2345	position, distorting te surface of the jelly. <br/>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	2346
cristy	baacd17	2011-04-30 23:11:03 +0000	[diff] [blame]	2347	Internally it is equivalent to generating a displacement map (see <a
cristy	d0bd44a	2010-09-24 12:38:11 +0000	[diff] [blame]	2348	href="#displace" >-displace</a>) for source image color look-up using
				2349	the <a href="#sparse-color" >-sparse-color</a> method of the same name.
				2350
				2351	</td>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	2352	</tr>
				2353
				2354	</table>
				2355
cristy	d0bd44a	2010-09-24 12:38:11 +0000	[diff] [blame]	2356	<p>To print a complete list of distortion methods, use <a href="#list">-list
				2357	distort</a>.</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	2358
				2359	<p>Many of the above distortion methods such as '<kbd>Affine</kbd>',
				2360	'<kbd>Perspective</kbd>', and '<kbd>Shepards</kbd>' use a list control points
				2361	defining how these points in the given image should be distorted in the
				2362	destination image. Each set of four floating point values represent a source
				2363	image coordinate, followed immediately by the destination image coordinate.
				2364	This produces a list of values such as...</p>
				2365	<div style="text-align: center"><em>
				2366	U<sub>1</sub>,V<sub>1</sub> X<sub>1</sub>,Y<sub>1</sub>
				2367	U<sub>2</sub>,V<sub>2</sub> X<sub>2</sub>,Y<sub>2</sub>
				2368	U<sub>3</sub>,V<sub>3</sub> X<sub>3</sub>,Y<sub>3</sub>
				2369	...
				2370	U<sub>n</sub>,V<sub>n</sub> X<sub>n</sub>,Y<sub>n</sub>
				2371	</em></div>
				2372	<p>where <em>U,V</em> on the source image is mapped to <em>X,Y</em> on the
				2373	destination image. </p>
				2374
				2375	<p>For example, to warp an image using '<kbd>perspective</kbd>' distortion,
				2376	needs a list of at least 4 sets of coordinates, or 16 numbers. Here is the
				2377	perspective distortion of the built-in "rose:" image. Note how spaces were
				2378	used to group the 4 sets of coordinate pairs, to make it easier to read and
				2379	understand.</p>
				2380
				2381	<p class='crt'><span class="crtprompt"> $magick> </span><span class='crtin'>
cristy	d0bd44a	2010-09-24 12:38:11 +0000	[diff] [blame]	2382	convert rose: -virtual-pixel black \<br/>
				2383	-distort Perspective '0,0,0,0 0,45,0,45 69,0,60,10 69,45,60,35' \<br/>
				2384	rose_3d_rotated.gif</span></p>
				2385	<p>If more that the required number of coordinate pairs are given for
				2386	a distortion, the distortion method is 'least squares' fitted to produce the
				2387	best result for all the coordinate pairs given. If less than the ideal number
				2388	of points are given, the distort will generally fall back to a simpler form of
				2389	distortion that can handles the smaller number of coordinates (usally a linear
				2390	'<kbd>Affine</kbd>' distortion). </p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	2391
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	2392	<p>By using more coordinates you can make use of image registration tool to
cristy	d0bd44a	2010-09-24 12:38:11 +0000	[diff] [blame]	2393	find matching coordinate pairs in overlapping images, so as to improve the
				2394	'fit' of the distortion. Of course a bad coordinate pair can also make the
				2395	'fit' worse. Caution is always advised. </p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	2396
				2397	<p>Colors are acquired from the source image according to the <a
				2398	href="#interpolate" >-interpolate</a> color lookup setting, when the image is
cristy	d0bd44a	2010-09-24 12:38:11 +0000	[diff] [blame]	2399	magnified. However if the viewed image is minified (image becomes smaller),
				2400	a special area resampling function (added ImageMagick v6.3.5-9), is used to
				2401	produce a higher quality image. For example you can use
				2402	a '<kbd>perspective</kbd>' distortion to view a infinitely tiled 'plane' all
				2403	the way to the horizon. </p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	2404
cristy	d0bd44a	2010-09-24 12:38:11 +0000	[diff] [blame]	2405	<p class='crt'><span class="crtprompt"> $magick> </span><span class='crtin'>
				2406	convert -size 90x90 pattern:checkerboard -normalize -virtual-pixel tile \<br/>
				2407	-distort perspective '0,0,5,45 89,0,45,46 0,89,0,89 89,89,89,89' \<br/>
				2408	checks_tiled.jpg</span></p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	2409	<p>Note that a infinitely tiled perspective images involving the horizon can
				2410	be very slow to generate due to the use of the high quality 'area resampling'
				2411	function (added ImageMagick v6.3.5-9). You can turn off 'area resampling'
				2412	using a <a href="#filter" >-filter</a> setting of '<kbd>point</kbd>'
				2413	(recommended if you plan to use super-sampling instead). </p>
				2414
				2415	<p>If an image generates <i>invalid pixels</i>, such as the 'sky' in the last
				2416	'<kbd>perspective</kbd>' distortion example, <a href="#distort" >-distort</a>
				2417	will use the current <a href="#mattecolor" >-mattecolor</a> setting for these
				2418	pixels. If you do not what these pixels to be visible, set the color to match
				2419	the rest of the ground. </p>
				2420
				2421	<p>The output image size will by default be the same as the input image. This
				2422	means that if the part of the distorted image falls outside the viewed area of
cristy	d0bd44a	2010-09-24 12:38:11 +0000	[diff] [blame]	2423	the 'distorted space', those parts is clipped and lost. However if you use
				2424	the plus form of the operator (<a href="#distort" >+distort</a>) the operator
				2425	will attempt (if possible) to show the whole of the distorted image, while
				2426	retaining a correct 'virtual canvas' offset, for image layering. This offset
				2427	may need to be removed using <a href="#repage" >+repage</a>, to remove if it
				2428	is unwanted. </p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	2429
				2430	<p>You can alternatively specify a special "<kbd><a href="#set" >-set</a>
				2431	option:distort:viewport {geometry_string}</kbd>" setting which will specify
				2432	the size and the offset of the generated 'viewport' image of the distorted
				2433	image space.</p>
				2434
				2435	<p>Adding a "<kbd><a href="#set" >-set</a> option:distort:scale
				2436	{scale_factor}</kbd>" will scale the output image (viewport or otherwise) by
				2437	that factor without changing the viewed contents of the distorted image. This
				2438	can be used either for 'super-sampling' the image for a higher quality result,
				2439	or for panning and zooming around the image (with appropriate viewport
				2440	changes, or post-distort cropping and resizing). </p>
				2441
				2442	<p>Setting <a href="#verbose" >-verbose</a> setting, will cause <a
				2443	href="#distort" >-distort</a> to attempt to output the internal coefficients,
				2444	and the <a href="#fx" >-fx</a> equivalent to the distortion, for expert study,
				2445	and debugging purposes. This many not be available for all distorts. </p>
				2446
				2447	<p>Affine rotations and shears (such as '<kbd>SRT</kbd>' distortion), tend to
				2448	produce a cleaner result that the equivalent <a href="#rotate" >-rotate</a>
				2449	and/or <a href="#shear" >-shear</a> operation, with more control of due to the
cristy	d0bd44a	2010-09-24 12:38:11 +0000	[diff] [blame]	2450	above settings. It is algorithmically slower however, though that may not be
				2451	the case in ImageMagick's implementation. </p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	2452
				2453
				2454	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	2455	<h4><a id="dither"></a>-dither <em class="arg">method</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	2456	</div>
				2457
				2458	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Apply a Riemersma or Floyd-Steinberg error diffusion dither to images when general color reduction is applied via an option, or automagically when saving to specific formats. This enabled by default. </td><td style='text-align:right;'></td></tr></table>
				2459
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	2460	<p>Dithering places two or more colors in neighboring pixels so that to the eye a closer approximation of the images original color is reproduced. This reduces the number of colors needed to reproduce the image but at the cost of a lower level pattern of colors. Error diffusion dithers can use any set of colors (generated or user defined) to an image. </p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	2461
				2462	<p>Dithering is turned on by default, to turn it off use the plus form of the
				2463	setting, <a href="#dither">+dither</a>. This will also also render PostScript
				2464	without text or graphic aliasing. Disabling dithering often (but not always)
				2465	leads to faster process, a smaller number of colors, but more cartoon like
				2466	image coloring. Generally resulting in 'color banding' effects in areas with
				2467	color gradients. </p>
				2468
				2469	<p>The color reduction operators <a href="#colors">-colors</a>, <a
				2470	href="#monochrome">-monochrome</a>, <a href="#remap ">-remap</a>, and <a href="#posterize">-posterize</a>, apply dithering to images using the reduced color set they created. These operators are also used as part of automatic color reduction when saving images to formats with limited color support, such as <kbd>GIF:</kbd>, <kbd>XBM:</kbd>, and others, so dithering may also be used in these cases. </p>
				2471
				2472	<p>Alternatively you can use <a href="#random-threshold">-random-threshold</a> to generate purely random dither. Or use <a href="#ordered-dither">-ordered-dither</a> to apply threshold mapped dither patterns, using uniform color maps, rather than specific color maps. </p>
				2473
				2474
				2475	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	2476	<h4><a id="draw"></a>-draw <em class="arg">string</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	2477	</div>
				2478
				2479	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Annotate an image with one or more graphic primitives.</td><td style='text-align:right;'></td></tr></table>
				2480
				2481	<p>Use this option to annotate or decorate an image with one or more graphic primitives. The primitives include shapes, text, transformations, and pixel operations.</p>
				2482
				2483	<p>The shape primitives:</p>
				2484
				2485	<pre class="text">
				2486	point x,y
				2487	line x0,y0 x1,y1
				2488	rectangle x0,y0 x1,y1
				2489	roundRectangle x0,y0 x1,y1 wc,hc
				2490	arc x0,y0 x1,y1 a0,a1
				2491	ellipse x0,y0 rx,ry a0,a1
				2492	circle x0,y0 x1,y1
				2493	polyline x0,y0 ... xn,yn
				2494	polygon x0,y0 ... xn,yn
				2495	bezier x0,y0 ... xn,yn
				2496	path path specification
				2497	image operator x0,y0 w,h filename
				2498	</pre>
				2499
				2500	<p>The text primitive:</p>
				2501
				2502	<pre class="text">
				2503	text x0,y0 string
				2504	</pre>
				2505	<p>The text gravity primitive:</p>
				2506
				2507	<pre class="text">
				2508	gravity NorthWest, North, NorthEast, West, Center,
				2509	East, SouthWest, South, or SouthEast
				2510	</pre>
				2511
				2512	<p>The text gravity primitive only affects the placement of text and does not interact with the other primitives. It is equivalent to using the <a href="#gravity">-gravity</a> command-line option, except that it is limited in scope to the <a href="#draw">-draw</a> option in which it appears.</p>
				2513
				2514	<p>The transformation primitives:</p>
				2515
				2516	<pre class="text">
cristy	e9a32c3	2011-04-07 01:11:05 +0000	[diff] [blame]	2517	rotate degrees
				2518	translate dx,dy
				2519	scale sx,sy
				2520	skewX degrees
				2521	skewY degrees
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	2522	</pre>
				2523
				2524	<p>The pixel operation primitives:</p>
				2525
				2526	<pre class="text">
cristy	e9a32c3	2011-04-07 01:11:05 +0000	[diff] [blame]	2527	color x0,y0 method
				2528	matte x0,y0 method
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	2529	</pre>
				2530
				2531	<p>The shape primitives are drawn in the color specified by the preceding <a href="#fill">-fill</a> setting. For unfilled shapes, use <a href="#fill">-fill none</a>. You can optionally control the stroke (the "outline" of a shape) with the <a href="#stroke">-stroke</a> and <a href="#strokewidth">-strokewidth</a> settings.</p>
				2532
				2533	<p>A <kbd>point</kbd> primitive is specified by a single <em>point</em> in the pixel plane, that is, by an ordered pair of integer coordinates, <em>x</em>,<em>y</em>. (As it involves only a single pixel, a <kbd>point</kbd> primitive is not affected by <a href="#stroke">-stroke</a> or <a href="#strokewidth">-strokewidth</a>.)</p>
				2534
				2535	<p>A <kbd>line</kbd> primitive requires a start point and end point.</p>
				2536
				2537	<p>A <kbd>rectangle</kbd> primitive is specified by the pair of points at the upper left and lower right corners.</p>
				2538
				2539	<p>A <kbd>roundRectangle</kbd> primitive takes the same corner points as a <kbd>rectangle</kbd> followed by the width and height of the rounded corners to be removed.</p>
				2540
				2541	<p>The <kbd>circle</kbd> primitive makes a disk (filled) or circle (unfilled). Give the center and any point on the perimeter (boundary).</p>
				2542
				2543	<p>The <kbd>arc</kbd> primitive is used to inscribe an elliptical segment in to a given rectangle. An <kbd>arc</kbd> requires the two corners used for <kbd>rectangle</kbd> (see above) followed by the start and end angles of the arc of the segment segment (e.g. 130,30 200,100 45,90). The start and end points produced are then joined with a line segment and the resulting segment of an ellipse is filled.</p>
				2544
				2545	<p>Use <kbd>ellipse</kbd> to draw a partial (or whole) ellipse. Give the center point, the horizontal and vertical "radii" (the <em>semi-axes</em> of the ellipse) and start and end angles in degrees (e.g. 100,100 100,150 0,360).</p>
				2546
				2547	<p>The <kbd>polyline</kbd> and <kbd>polygon</kbd> primitives require three or more points to define their perimeters. A <kbd>polyline</kbd> is simply a <kbd>polygon</kbd> in which the final point is not stroked to the start point. When unfilled, this is a <em>polygonal line</em>. If the <a href="#stroke">-stroke</a> setting is <kbd>none</kbd> (the default), then a <kbd>polyline</kbd> is identical to a <kbd>polygon</kbd>.
				2548	</p>
				2549
				2550	<p>A <em>coordinate</em> is a pair of integers separated by a space or optional comma. </p>
				2551
				2552	<p>As an example, to define a circle centered at 100,100 that extends to 150,150 use:</p>
				2553
				2554	<p class="crtsnip">
				2555	-draw 'circle 100,100 150,150'
				2556	</p>
				2557
				2558	<p>The <kbd>Bezier</kbd> primitive creates a spline curve and requires three or points to define its shape. The first and last points are the <em>knots</em> and these points are attained by the curve, while any intermediate coordinates are <em>control points</em>. If two control points are specified, the line between each end knot and its sequentially respective control point determines the tangent direction of the curve at that end. If one control point is specified, the lines from the end knots to the one control point determines the tangent directions of the curve at each end. If more than two control points are specified, then the additional control points act in combination to determine the intermediate shape of the curve. In order to
				2559	draw complex curves, it is highly recommended either to use the <kbd>path</kbd> primitive or to draw multiple four-point bezier segments with the start and end knots of each successive segment repeated. For example:</p>
				2560
				2561	<p class="crtsnip">
				2562	-draw 'bezier 20,50 45,100 45,0 70,50'
				2563	</p>
				2564	<p class="crtsnip">
				2565	-draw 'bezier 70,50 95,100 95,0 120,50'
				2566	</p>
				2567
				2568
				2569	<p>A <kbd>path</kbd> represents an outline of an object, defined in terms of moveto (set a new current point), lineto (draw a straight line), curveto (draw a Bezier curve), arc (elliptical or circular arc) and closepath (close the current shape by drawing a line to the last moveto) elements. Compound paths (i.e., a path with subpaths, each consisting of a single moveto followed by one or more line or curve operations) are possible to allow effects such as <em>donut holes</em> in objects. (See <a href="http://www.w3.org/TR/SVG/paths.html">Paths</a>.)</p>
				2570
				2571	<p>Use <kbd>image</kbd> to composite an image with another image. Follow the image keyword with the composite operator, image location, image size, and filename:</p>
				2572
				2573	<p class="crtsnip">
				2574	-draw 'image SrcOver 100,100 225,225 image.jpg'
				2575	</p>
				2576
cristy	bc9539a	2010-08-16 18:06:20 +0000	[diff] [blame]	2577	<p>You can use 0,0 for the image size, which means to use the actual
				2578	dimensions found in the image header. Otherwise, it is scaled to the given
				2579	dimensions. See <a href="../www/compose.html">Alpha Compositing</a> for
cristy	29c5c99	2011-06-25 13:58:49 +0000	[diff] [blame]	2580	a detailed discussion of alpha composition methods that are available.
				2581	The "special augmented compose operators" such as "dissolve" that require
				2582	arguments cannot be used at present with the <kbd>-draw image</kbd> option.
				2583	</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	2584	<p>Use <kbd>text</kbd> to annotate an image with text. Follow the text coordinates with a string. If the string has embedded spaces, enclose it in single or double quotes.</p>
				2585
				2586	<p>For example, the following annotates the image with <kbd>Works like magick!</kbd> for an image titled <kbd>bird.miff</kbd>. </p>
				2587
				2588	<p class="crtsnip">
cristy	4bf6e23	2011-05-21 01:43:33 +0000	[diff] [blame]	2589	-draw "text 100,100 'Works like magick!' "
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	2590	</p>
				2591
				2592	<p>See the <a href="#annotate">-annotate</a> option for another convenient way to annotate an image with text.</p>
				2593
				2594	<p>The <kbd>rotate</kbd> primitive rotates subsequent shape primitives and text primitives about the origin of the main image. If the <a href="#region">-region</a> option precedes the <a href="#draw">-draw</a> option, the origin for transformations is the upper left corner of the region.</p>
				2595
				2596	<p>The <kbd>translate</kbd> primitive translates subsequent shape and text primitives.</p>
				2597
				2598	<p>The <kbd>scale</kbd> primitive scales them.</p>
				2599
				2600	<p>The <kbd>skewX</kbd> and <kbd>skewY</kbd> primitives skew them with respect to the origin of the main image or the region.</p>
				2601
				2602	<p>The transformations modify the current affine matrix, which is initialized from the initial affine matrix defined by the <a href="#affine">-affine</a> option. Transformations are cumulative within the <a href="#draw">-draw</a> option. The initial affine matrix is not affected; that matrix is only changed by the appearance of another <a href="#affine">-affine</a> option. If another <a href="#draw">-draw</a> option appears, the current affine matrix is reinitialized from the initial affine
				2603	matrix.</p>
				2604
				2605	<p>Use the <kbd>color</kbd> primitive to change the color of a pixel to the fill color (see <a href="#fill">-fill</a>). Follow the pixel coordinate with a method:</p>
				2606
				2607	<pre class="text">
				2608	point
				2609	replace
				2610	floodfill
				2611	filltoborder
				2612	reset
				2613	</pre>
				2614
				2615	<p>Consider the target pixel as that specified by your coordinate. The <kbd>point</kbd> method recolors the target pixel. The <kbd>replace</kbd> method recolors any pixel that matches the color of the target pixel. <kbd>Floodfill</kbd> recolors any pixel that matches the color of the target pixel and is a neighbor, whereas <kbd>filltoborder</kbd> recolors any neighbor pixel that is not the border color. Finally, <kbd>reset</kbd> recolors all pixels.</p>
				2616
				2617	<p>Use <kbd>matte</kbd> to the change the pixel matte value to transparent. Follow the pixel coordinate with a method (see the <kbd>color</kbd> primitive for a description of methods). The <kbd>point</kbd> method changes the matte value of the target pixel. The <kbd>replace</kbd> method changes the matte value of any pixel that matches the color of the target pixel. <kbd>Floodfill</kbd> changes the matte value of any pixel that matches the color of the target pixel and is a neighbor, whereas <kbd>filltoborder</kbd> changes the matte value of any neighbor pixel that is not the border color (<a href="#bordercolor">-bordercolor</a>). Finally <kbd>reset</kbd> changes the matte value of all pixels.</p>
				2618
				2619	<p>You can set the primitive color, font, and font bounding box color with <a href="#fill">-fill</a>, <a href="#font">-font</a>, and <a href="#box">-box</a> respectively. Options are processed in command line order so be sure to use these options <em>before</em> the <a href="#draw">-draw</a> option.</p>
				2620
				2621	<p>Strings that begin with a number must be quoted (e.g. use '1.png' rather than 1.png).</p>
				2622
				2623	<p>Drawing primitives conform to the <a href="../www/magick-vector-graphics.html">Magick Vector Graphics</a> format.</p>
				2624
cristy	2dcd682	2011-06-13 16:21:20 +0000	[diff] [blame]	2625
cristy	8b9dd95	2011-03-21 22:56:18 +0000	[diff] [blame]	2626	<div style="margin: auto;">
cristy	323f35b	2011-03-24 23:05:13 +0000	[diff] [blame]	2627	<h4><a id="duplicate"></a>-duplicate <em class="arg">count,indexes</em></h4>
cristy	8b9dd95	2011-03-21 22:56:18 +0000	[diff] [blame]	2628	</div>
				2629
cristy	323f35b	2011-03-24 23:05:13 +0000	[diff] [blame]	2630	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>duplicate an image one or more times.</td><td style='text-align:right;'></td></tr></table>
cristy	8b9dd95	2011-03-21 22:56:18 +0000	[diff] [blame]	2631
cristy	323f35b	2011-03-24 23:05:13 +0000	[diff] [blame]	2632	<p>Specify the count and the image to duplicate by its index in the sequence. The first image is index 0. Negative indexes are relative to the end of the sequence, for example, -1 represents the last image of the sequence. Specify a range of images with a dash (e.g. 0-4). Separate indexes with a comma (e.g. 0,2). Use <kbd>+duplicate</kbd> to duplicate the last image in the current image sequence.</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	2633
				2634	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	2635	<h4><a id="edge"></a>-edge <em class="arg">radius</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	2636	</div>
				2637
				2638	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>detect edges within an image.</td><td style='text-align:right;'></td></tr></table>
				2639
				2640	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	2641	<h4><a id="emboss"></a>-emboss <em class="arg">radius</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	2642	</div>
				2643
				2644	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>emboss an image.</td><td style='text-align:right;'></td></tr></table>
				2645
				2646	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	2647	<h4><a id="encipher"></a>-encipher <em class="arg">filename</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	2648	</div>
				2649
				2650	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Encipher pixels for later deciphering by <a href="#decipher">-decipher</a>.</td><td style='text-align:right;'></td></tr></table>
				2651
				2652	<p>Get the passphrase from the file specified by <em class="arg">filename</em>.</p>
				2653
				2654	<p>For more information, see the webpage, <a href="http://www.imagemagick.org/www/cipher.html">ImageMagick: Encipher or Decipher an Image</a>.</p>
				2655
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	2656
				2657
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	2658	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	2659	<h4><a id="encoding"></a>-encoding <em class="arg">type</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	2660	</div>
				2661
				2662	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>specify the text encoding.</td><td style='text-align:right;'></td></tr></table>
				2663
				2664	<p>Choose from <kbd>AdobeCustom</kbd>, <kbd>AdobeExpert</kbd>, <kbd>AdobeStandard</kbd>, <kbd>AppleRoman</kbd>, <kbd>BIG5</kbd>, <kbd>GB2312</kbd>, <kbd>Latin 2</kbd>, <kbd>None</kbd>, <kbd>SJIScode</kbd>, <kbd>Symbol</kbd>, <kbd>Unicode</kbd>, <kbd>Wansung</kbd>.</p>
				2665
				2666	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	2667	<h4><a id="endian"></a>-endian <em class="arg">type</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	2668	</div>
				2669
				2670	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Specify endianness (<kbd>MSB</kbd> or <kbd>LSB</kbd>) of the image.</td><td style='text-align:right;'></td></tr></table>
				2671
				2672	<p>To print a complete list of endian types, use the <a href="#list">-list endian</a> option.</p>
				2673
				2674	<p>Use <a href="#endian">+endian</a> to revert to unspecified endianness.</p>
				2675
				2676
				2677	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	2678	<h4><a id="enhance"></a>-enhance</h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	2679	</div>
				2680
				2681	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Apply a digital filter to enhance a noisy image.</td><td style='text-align:right;'></td></tr></table>
				2682
				2683
				2684	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	2685	<h4><a id="equalize"></a>-equalize</h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	2686	</div>
				2687
				2688	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>perform histogram equalization on the image channel-by-channel.</td><td style='text-align:right;'></td></tr></table>
				2689
				2690	<p>To perform histogram equalization on all channels in concert, transform the image into some other color space, such as HSL, OHTA, YIQ or YUV, then equalize the appropriate intensity-like channel, then convert back to RGB.</p>
				2691
				2692	<p>For example using HSL, we have: ... <kbd>-colorspace HSL -channel lightness -equalize -colorspace RGB</kbd> ...</p>
				2693
				2694	<p>For YIQ, YUV and OHTA use the red channel. For example, OHTA is a principal components transformation that puts most of the information in the first channel. Here we have ... <kbd>-colorspace OHTA -channel red -equalize -colorspace RGB</kbd> ...</p>
				2695
				2696	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	2697	<h4><a id="evaluate"></a>-evaluate <em class="arg">operator value</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	2698	</div>
				2699
				2700	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Alter channel pixels by evaluating an arithmetic, relational, or logical expression.</td><td style='text-align:right;'></td></tr></table>
				2701
				2702	<p>(See the <a href="#function" >-function</a> operator for some multi-parameter functions. See the <a href="#fx" >-fx</a> operator if more elaborate calculations are needed.)</p>
				2703
				2704	<p>The behaviors of each <em class="arg">operator</em> are summarized in the following list. For brevity, the numerical value of a "pixel" referred to below is the value of the corresponding channel of that pixel, while a "normalized pixel" is that number divided by the maximum (installation-dependent) value <em class="QR">QuantumRange</em>. (If normalized pixels are used, they are restored, following the other calculations, to the full range by multiplying by <em class="QR">QuantumRange</em>.)</p>
				2705
				2706	<table class="doc">
				2707	<col width="25%" />
				2708	<col width="75%" />
				2709	<thead>
				2710	<tr>
				2711	<th><em class="arg">operator</em></th>
				2712	<th>Summary (see further below for details)</th>
				2713	</tr>
				2714	</thead>
				2715	<tbody>
				2716
cristy	3c98a4f	2010-08-13 20:09:41 +0000	[diff] [blame]	2717	<tr><td>Abs </td> <td>Add <em class="arg">value</em> to pixels and return absolute value. </td></tr>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	2718	<tr><td>Add </td> <td>Add <em class="arg">value</em> to pixels. </td></tr>
				2719	<tr><td>AddModulus </td> <td>Add <em class="arg">value</em> to pixels modulo <em class="QR">QuantumRange</em>.</td></tr>
				2720	<tr><td>And </td> <td>Binary AND of pixels with <em class="arg">value</em>.</td></tr>
				2721	<tr><td>Cos, Cosine </td> <td>Apply cosine to pixels with frequency <em class="arg">value</em> with 50% bias added.</td></tr>
				2722	<tr><td>Divide </td> <td>Divide pixels by <em class="arg">value</em>.</td></tr>
cristy	5063d81	2010-10-19 16:28:10 +0000	[diff] [blame]	2723	<tr><td>Exp </td> <td>base-e exponential function</td></tr>
				2724	<tr><td>Exponential </td> <td>base-e exponential function</td></tr>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	2725	<tr><td>LeftShift </td> <td>Shift the pixel values left by <em class="arg">value</em> bits (i.e., multiply pixels by 2<sup><em class="arg">value</em></sup>).</td></tr>
				2726	<tr><td>Log </td> <td>Apply scaled logarithm to normalized pixels.</td></tr>
				2727	<tr><td>Max </td> <td>Clip pixels at lower bound <em class="arg">value</em>.</td></tr>
cristy	63fed27	2010-03-07 19:08:45 +0000	[diff] [blame]	2728	<tr><td>Mean </td> <td>Add the <em class="arg">value</em> and divide by 2.</td></tr>
cristy	61365ad	2010-11-28 02:38:34 +0000	[diff] [blame]	2729	<tr><td>Median </td> <td>Choose the median value from an image sequence.</td></tr>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	2730	<tr><td>Min </td> <td>Clip pixels at upper bound <em class="arg">value</em>.</td></tr>
				2731	<tr><td>Multiply </td> <td>Multiply pixels by <em class="arg">value</em>.</td></tr>
				2732	<tr><td>Or </td> <td>Binary OR of pixels with <em class="arg">value</em>.</td></tr>
				2733	<tr><td>Pow </td> <td>Raise normalized pixels to the power <em class="arg">value</em>.</td></tr>
				2734	<tr><td>RightShift </td> <td>Shift the pixel values right by <em class="arg">value</em> bits (i.e., divide pixels by 2<sup><em class="arg">value</em></sup>).</td></tr>
				2735	<tr><td>Set </td> <td>Set pixel equal to <em class="arg">value</em>.</td></tr>
				2736	<tr><td>Sin, Sine </td> <td>Apply sine to pixels with frequency <em class="arg">value</em> with 50% bias added.</td></tr>
				2737	<tr><td>Subtract </td> <td>Subtract <em class="arg">value</em> from pixels.</td></tr>
				2738	<tr><td>Xor </td> <td>Binary XOR of pixels with <em class="arg">value.</em></td></tr>
				2739
				2740	<tr><td> </td></tr>
				2741
				2742	<tr><td>Gaussian-noise</td></tr>
				2743	<tr><td>Impulse-noise</td></tr>
				2744	<tr><td>Laplacian-noise</td></tr>
				2745	<tr><td>Multiplicative-noise</td> <td>(These are equivalent to the corresponding <a href="#noise" >-noise</a> operators.)</td></tr>
				2746	<tr><td>PoissonNoise</td></tr>
				2747	<tr><td>Uniform-noise</td></tr>
				2748
				2749	<tr><td> </td></tr>
				2750
				2751	<tr><td>Threshold </td> <td>Threshold pixels larger than <em class="arg">value</em>.</td></tr>
				2752	<tr><td>ThresholdBlack </td> <td>Threshold pixels to zero values equal to or below <em class="arg">value</em>.</td></tr>
				2753	<tr><td>ThresholdWhite </td> <td>Threshold pixels to maximum values above <em class="arg">value</em>. </td></tr>
				2754	</tbody>
				2755	</table>
				2756
				2757	<p>The specified functions are applied only to each previously set <a
				2758	href="#channel" >-channel</a> in the image. If necessary, the results of the
				2759	calculations are truncated (clipped) to fit in the interval [0, <em
				2760	class="QR">QuantumRange</em>]. The transparency channel of the image is
				2761	represented as a 'alpha' values (0 = fully transparent), so, for example, a
				2762	<kbd>Divide</kbd> by 2 of the alpha channel will make the image
				2763	semi-transparent. Append the percent symbol '<kbd>%</kbd>' to specify a value
				2764	as a percentage of the <em class="QR">QuantumRange</em>.</p>
				2765
				2766	<p>To print a complete list of <a href="#evaluate">-evaluate</a> operators, use
				2767	<a href="#list">-list evaluate</a>.</p>
				2768
				2769	<p>The results of the <kbd>Add</kbd>, <kbd>Subtract</kbd> and
				2770	<kbd>Multiply</kbd> methods can also be achieved using either the <a
				2771	href="#level" >-level</a> or the <a href="#level" >+level</a> operator, with
				2772	appropriate argument, to linearly modify the overall range of color values.
				2773	Please note, however, that <a href="#level" >-level</a> treats transparency as
				2774	'matte' values (0 = opaque), while <a href="#level" >-evaluate</a> works with
				2775	'alpha' values.</p>
				2776
				2777	<p><kbd>AddModulus</kbd> has been added as of ImageMagick 6.4.8-4 and provides addition modulo the <em class="QR">QuantumRange</em>. It is therefore equivalent to <kbd>Add</kbd> unless the resulting pixel value is outside the interval [0, <em class="QR">QuantumRange</em>]. </p>
				2778
cristy	ce66ab1	2010-10-21 23:36:32 +0000	[diff] [blame]	2779	<p><kbd>Exp or Exponential</kbd> has been added as of ImageMagick 6.6.5-1 and works on normalized pixel values. The <em class="arg">value</em> used with <kbd>Exp</kbd> should be negative so as to produce a decaying exponential function. Non-negative values will always produce results larger unity and thus outside the interval [0, <em class="QR">QuantumRange</em>]. The formula is expressed below. </p>
				2780
				2781	<div style="text-align:center;">
				2782	exp(<em class="arg">value</em> × <b><em>u</em></b>)
				2783	</div>
				2784
				2785	<p> If the input image is squared, for example, using <a
				2786	href="#-function" >-function polynomial "2 0 0"</a>, then a decaying Gaussian function will be the result.</p>
				2787
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	2788	<p><kbd>Log</kbd> has been added as of ImageMagick 6.4.2-1 and works on normalized pixel values. This a <em>scaled</em> log function. The <em class="arg">value</em> used with <kbd>Log</kbd> provides a <em>scaling factor</em> that adjusts the curvature in the graph of the log function. The formula applied to a normalized value <b><em>u</em></b> is below. </p>
				2789
				2790	<div style="text-align:center;">
				2791	log(<em class="arg">value</em> × <b><em>u</em></b> + 1) / log(<em class="arg">value</em> + 1)
				2792	</div>
				2793
				2794	<p><kbd>Pow</kbd> has been added as of ImageMagick 6.4.1-9, and works on
				2795	normalized pixel values. Note that <kbd>Pow</kbd> is related to the <a
				2796	href="#gamma" >-gamma</a> operator. For example, <b>-gamma 2</b> is equivalent
				2797	to <b>-evaluate pow 0.5</b>, i.e., a 'square root' function. The value used
				2798	with <a href="#gamma" >-gamma</a> is simply the reciprocal of the value used
				2799	with <kbd>Pow</kbd>.</p>
				2800
				2801	<p><kbd>Cosine</kbd> and <kbd>Sine</kbd> was added as of IM v6.4.8-8 and
				2802	converts the image values into a value according to a (co)sine wave function.
				2803	The synonyms <kbd>Cos</kbd> and <kbd>Sin</kbd> may also be used. The output
				2804	is biased 50% and normalized by 50% so as to fit in the respective color value
				2805	range. The <em class="arg">value</em> scaling of the <em>period</em> of the
				2806	function (its frequency), and thus determines the number of 'waves' that will
				2807	be generated over the input color range. For example, if the <em
				2808	class="arg">value</em> is 1, the effective period is simply the <em
				2809	class="QR">QuantumRange</em>; but if the <em class="arg">value</em> is 2,
				2810	then the effective period is the <em>half</em> the <em
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	2811	class="QR">QuantumRange</em>.</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	2812
				2813	<div style="text-align:center;">
				2814	0.5 + 0.5 × cos(2 π <b><em>u</em></b> × <em class="arg">value</em>).
				2815	</div>
				2816
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	2817	<p>See also the <a href="#function" >-function</a> operator, which is a
				2818	multi-value version of evaluate. </p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	2819
cristy	63fed27	2010-03-07 19:08:45 +0000	[diff] [blame]	2820	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	2821	<h4><a id="evaluate-sequence"></a>-evaluate-sequence <em class="arg">operator</em></h4>
cristy	63fed27	2010-03-07 19:08:45 +0000	[diff] [blame]	2822	</div>
				2823
				2824	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Alter channel pixels by evaluating an arithmetic, relational, or logical expression over a sequence of images.</td><td style='text-align:right;'></td></tr></table>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	2825
				2826	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	2827	<h4><a id="extent"></a>-extent <em class="arg">geometry</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	2828	</div>
				2829
				2830	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Set the image size and offset.</td><td style='text-align:right;'></td></tr></table>
				2831
cristy	3e2860c	2010-01-24 01:36:30 +0000	[diff] [blame]	2832	<p>If the image is enlarged, unfilled areas are set to the background color. To position the image, use offsets in the <em class="arg">geometry</em> specification or precede with a <a href="#gravity">-gravity</a> setting. To specify how to compose the image with the background, use <a href="#compose" >-compose</a>.</p>
cristy	549177c	2010-11-11 13:51:21 +0000	[diff] [blame]	2833	<p>This command reduces or expands a JPEG image to fit on an 800x600
				2834	display. If the aspect ratio of the input image isn't exactly 4:3, then the
				2835	image is centered on an 800x600 black canvas: </p>
				2836
				2837	<p class='crt'><span class="crtprompt"> $magick> </span><span class='crtin'>convert input.jpg -resize 800x600 -background black -compose Copy \ <br /> -gravity center -extent 800x600 -quality 92 output.jpg</span></p>
				2838
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	2839
				2840	<p>See <a href="../www/command-line-processing.html#geometry">Image Geometry</a> for complete details about the <em class="arg">geometry</em> argument.</p>
				2841
				2842	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	2843	<h4><a id="extract"></a>-extract <em class="arg">geometry</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	2844	</div>
				2845
				2846	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Extract the specified area from image.</td><td style='text-align:right;'></td></tr></table>
				2847
				2848	<p>This option is most useful for extracting a subregion of a very large raw image. Note that these two commands are equivalent:</p>
				2849
cristy	4949d52	2010-03-12 18:41:34 +0000	[diff] [blame]	2850	<p class='crt'><span class="crtprompt"> $magick> </span><span class='crtin'>convert -size 16000x16000 -depth 8 -extract 640x480+1280+960 \ <br/> image.rgb image.png</span><span class='crtout'></span><span class="crtprompt"> $magick> </span><span class='crtin'>convert -size 16000x16000 -depth 8 'image.rgb[640x480+1280+960]' \ <br/> image.rgb image.png</span></p><p>If you omit the offsets, as in</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	2851
cristy	4949d52	2010-03-12 18:41:34 +0000	[diff] [blame]	2852	<p class='crt'><span class="crtprompt"> $magick> </span><span class='crtin'>convert -size 16000x16000 -depth 8 -extract 640x480 \ <br/> image.rgb image.png</span></p>
cristy	d0bd44a	2010-09-24 12:38:11 +0000	[diff] [blame]	2853	<p>the image is <em>resized</em> to the specified dimensions instead,
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	2854	equivalent to:</p>
				2855
				2856	<p class='crt'><span class="crtprompt"> $magick> </span><span class='crtin'>convert -size 16000x16000 -depth 8 -resize 640x480 image.rgb image.png</span></p>
				2857	<p>See <a href="../www/command-line-processing.html#geometry">Image Geometry</a> for complete details about the <em class="arg">geometry</em> argument.</p>
				2858
				2859	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	2860	<h4><a id="family"></a>-family <em class="arg">fontFamily</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	2861	</div>
				2862
				2863	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Set a font family for text.</td><td style='text-align:right;'></td></tr></table>
				2864
				2865	<p>This setting suggests a font family that ImageMagick should try to use for rendering text. If the family can be found it is used; if not, a default font (e.g., "Arial") or a family known to be similar is substituted (e.g., "Courier" might be used if "System" is requested but not found).
				2866	</p>
				2867
				2868	<p>For other settings that affect fonts, see the options <a href="#font">-font</a>, <a href="#stretch">-stretch</a>, <a href="#style">-style</a>, and <a href="#weight">-weight</a>.
				2869	</p>
				2870
				2871	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	2872	<h4><a id="features"></a>-features <em class="arg">distance</em></h4>
cristy	7396d88	2010-01-27 02:37:56 +0000	[diff] [blame]	2873	</div>
				2874
				2875	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>display features for each channel in the image in each of four directions (horizontal, vertical, left and right diagonals) for the specified distance.</td><td style='text-align:right;'></td></tr></table>
				2876
				2877	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	2878	<h4><a id="fft"></a>-fft</h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	2879	</div>
				2880
				2881	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>implements the forward discrete Fourier transform (DFT).</td><td style='text-align:right;'></td></tr></table>
				2882
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	2883	<p>This option is new as of ImageMagick 6.5.4-3 (and now working for Windows users in ImageMagick 6.6.0-9). It transforms an image from the normal (spatial) domain to the frequency domain. In the frequency domain, an image is represented as a superposition of complex sinusoidal waves of varying amplitudes. The image x and y coordinates are the possible frequencies along the x and y directions, respectively, and the pixel intensity values are complex numbers that correspond to the sinusoidal wave amplitudes. See for example, <a href="http://en.wikipedia.org/wiki/Fourier_transform">Fourier Transform</a>, <a href="http://en.wikipedia.org/wiki/DFT">Discrete Fourier Transform</a> and <a href="http://en.wikipedia.org/wiki/FFT">Fast Fourier Transform</a>.</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	2884
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	2885	<p>A single image name is provided as output for this option. However, the output result will have two components. It is either a two-frame image or two separate images, depending upon whether the image format specified supports multi-frame images. The reason that we get a dual output result is because the frequency domain represents an image using complex numbers, which cannot be visualized directly. Therefore, the complex values are automagically separated into a two-component image representation. The first component is the magnitude of the complex number and the second is the phase of the complex number. See for example, <a href="http://en.wikipedia.org/wiki/Complex_numbers">Complex Numbers</a>.</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	2886
				2887	<p>The magnitude and phase component images must be specified using image formats that do not limit the color or compress the image. Thus, MIFF, TIF, PFM, EXR and PNG are the recommended image formats to use. All of these formats, except PNG support multi-frame images. So for example,</p>
				2888
				2889	<p class='crt'><span class="crtprompt"> $magick> </span><span class='crtin'>convert image.png -fft fft_image.miff</span></p>
				2890	<p>generates a magnitude image as <kbd>fft_image.miff[0]</kbd> and a phase image as <kbd>fft_image.miff[1]</kbd>. Similarly,</p>
				2891
				2892	<p class='crt'><span class="crtprompt"> $magick> </span><span class='crtin'>convert image.png -fft fft_image.png</span></p>
				2893	<p>generates a magnitude image as <kbd>fft_image-0.png</kbd> and a phase image as <kbd>fft_image-1.png</kbd>. If you prefer this representation, then you can force any of the other formats to produce two output images by including <a href="#adjoin">+adjoin</a> following -fft in the command line.</p>
				2894
cristy	d0bd44a	2010-09-24 12:38:11 +0000	[diff] [blame]	2895	<p>The input image can be any size, but if not square and even-dimensioned, it is padded automagically to the larger of the width or height of the input image and to an even number of pixels. The padding will occur at the bottom and/or right sides of the input image. The resulting output magnitude and phase images is square at this size. The kind of padding relies on the <a href="#virtual-pixel">-virtual-pixel</a> setting.</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	2896
				2897	<p>Both output components will have dynamic ranges that fit within [0, <em class="QR">QuantumRange</em>], so that HDRI need not be enabled. Phase values nominally range from 0 to 2*π, but for non-HDRI compilations of ImageMagick, the phase image is scaled to span the full dynamic range. The magnitude image is not scaled and thus generally will contain very small values. As such, the image normally will appear totally black. In order to view any detail, the magnitude image typically is enhanced with a log function into what is usually called the spectrum. A log function is used to enhance the darker values more in comparison to the lighter values. This can be done, for example, as follows:</p>
				2898
				2899	<p class='crt'><span class="crtprompt"> $magick> </span><span class='crtin'>convert fft_image.miff[0] -contrast-stretch 0 \ <br />
				2900	-evaluate log 1000 fft_image_spectrum.png</span></p>
				2901	<p>where the <a href="#contrast-stretch">-contrast-stretch</a> 0 is used to scale the image to full dynamic range, first. The argument to the <a href="#evaluate">-evaluate</a> log typically is specified between 100 and 10,000, depending upon the amount of detail that one wants to bring out in the spectrum. Larger values produce more visible detail. Too much detail, however, may hide the important features.</p>
				2902
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	2903	<p>The <a href="http://www.fftw.org/">FFTW</a> delegate library is required to use <a href="#fft">-fft</a>.</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	2904
				2905	<p>Use <a href="#fft">+fft</a> to produce two output images that are the real and imaginary components of the complex valued Fourier transform.</p>
				2906
				2907	<p>However, as the real and imaginary components can contain negative values, this requires that IM be configured with HDRI enabled. In this case, you must use either MIFF, TIF or PFM formats for the real and imaginary component results, since they are formats that preserve both negative and fractional values without clipping them or truncating the fractional part.</p>
				2908
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	2909	<p>The real and imaginary component images resulting from <a href="#fft">+fft</a> is also square, even dimensioned images due to the same padding that was discussed above for the magnitude and phase component images.</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	2910
				2911	<p>See the discussion on HDRI implementations of ImageMagick on the page
cristy	4777498	2011-02-15 15:17:19 +0000	[diff] [blame]	2912	<a href="../www/high-dynamic-range.html">High Dynamic-Range Images</a>. For more about HDRI go the ImageMagick <a href="http://www.imagemagick.org/Usage/basics/#hdri">Usage</a> pages or this <a href="http://en.wikipedia.org/wiki/High_dynamic_range_imaging">Wikipedia</a> entry.
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	2913	</p>
				2914
				2915
				2916	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	2917	<h4><a id="fill"></a>-fill <em class="arg">color</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	2918	</div>
				2919
				2920	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>color to use when filling a graphic primitive.</td><td style='text-align:right;'></td></tr></table>
				2921
				2922	<p>This option accepts a color name, a hex color, or a numerical RGB, RGBA, HSL, HSLA, CMYK, or CMYKA specification. See <a href="../www/color.html">Color Names</a> for a description of how to properly specify the color argument.</p>
				2923
				2924	<p>Enclose the color specification in quotation marks to prevent the "#" or the parentheses from being interpreted by your shell.</p>
				2925
				2926	<p>For example,</p>
				2927
				2928	<p class="crtsnip">
				2929	-fill blue
				2930	</p>
				2931	<p class="crtsnip">
				2932	-fill "#ddddff"
				2933	</p>
				2934	<p class="crtsnip">
				2935	-fill "rgb(255,255,255)"
				2936	</p>
				2937
				2938	<p>See <a href="#draw">-draw</a> for further details.</p>
				2939
				2940	<p>To print a complete list of color names, use the <a href="#list">-list color</a> option.</p>
				2941
				2942	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	2943	<h4><a id="filter"></a>-filter <em class="arg">type</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	2944	</div>
				2945
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	2946	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Use this <em class="arg">type</em> of filter when resizing or
				2947	distorting an image.</td><td style='text-align:right;'></td></tr></table>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	2948
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	2949	<p>Use this option to affect the resizing operation of an image during
				2950	operations such as <a href="#resize">-resize</a> and <a href="#distort"
				2951	>-distort</a>. For example you can use a simple resize filter such as:</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	2952
				2953	<pre class="text">
				2954	Point Hermite Cubic
				2955	Box Gaussian Catrom
				2956	Triangle Quadratic Mitchell
				2957	</pre>
				2958
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	2959	<p>The <kbd>Bessel</kbd> and <kbd>Sinc</kbd> filter is also provided (as well
cristy	d0bd44a	2010-09-24 12:38:11 +0000	[diff] [blame]	2960	as a faster <kbd>SincFast</kbd> equivalent form). However these filters are
				2961	generally useless on their own as they are infinite filters that are being
				2962	clipped to the filters support size. Their direct use is not recommended
				2963	except via expert settings (see below). </p>
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	2964
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	2965	<p>Instead these special filter functions are typically windowed by a windowing
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	2966	function that the <a href="#filter" >-filter</a> setting defines. That is
				2967	using these functions will define a 'Windowed' filter, appropriate to the
				2968	operator involved. Windowed filters include: </p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	2969
				2970	<pre class="text">
				2971	Lanczos Hamming Parzen
				2972	Blackman Kaiser Welsh
				2973	Hanning Bartlett Bohman
				2974	</pre>
				2975
				2976	<p>Also one special self-windowing filter is also provided
				2977	<kbd>Lagrange</kbd>, which will automagically re-adjust its function depending
				2978	on the current 'support' or 'lobes' expert settings (see below).</p>
				2979
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	2980	<p>If you do not select a filter with this option, the filter defaults to
				2981	<kbd>Mitchell</kbd> for a colormapped image, a image with a matte channel, or
				2982	if the image is enlarged. Otherwise the filter default to
				2983	<kbd>Lanczos</kbd>.</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	2984
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	2985	<p>To print a complete list of resize filters, use the <a href="#list">-list
				2986	filter</a> option.</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	2987
				2988	<p>You can modify how the filter behaves as it scales your image through the
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	2989	use of these expert settings (see also <a href="#define" >-define</a> and <a
				2990	href="#set" >-set</a>):-</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	2991
				2992	<dl class="doc">
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	2993	<dt>-define filter:blur=<em>factor</em></dt>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	2994	<dd>Scale the X axis of the filter (and its window). Use > 1.0 for
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	2995	blurry or < 1.0 for sharp. This should only be used with Gaussian and
				2996	Gaussian-like filters simple filters, or you may not get the expected
				2997	results. </dd>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	2998
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	2999	<dt>-define filter:support=<em>radius</em></dt>
				3000	<dd>Set the filter support radius. Defines how large the filter should be and
				3001	thus directly defines how slow the filtered resampling process is. All
				3002	filters have a default 'prefered' support size. Some filters like
				3003	<kbd>Lagrange</kbd> and windowed filters adjust themselves depending on
				3004	this value. With simple filters this value either does nothing (but slow
				3005	the resampling), or will clip the filter function in a detrimental way.
				3006	</dd>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3007
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	3008	<dt>-define filter:lobes=<em>count</em></dt>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3009	<dd>Set the number of lobes to use for the Sinc/Bessel filter. This an
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	3010	alternative way of specifying the 'support' range of the filter, that is
				3011	designed to be more suited to windowed filters, especially when used for
				3012	image distorts.</dd>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3013
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	3014	<dt>-define filter:b=<em>b-spline_factor</em></dt>
				3015	<dt>-define filter:c=<em>keys_alpha_factor</em></dt>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3016	<dd>Redefine the values used for cubic filters such as <kbd>Cubic</kbd>,
				3017	<kbd>Catrom</kbd>, <kbd>Mitchel</kbd>, and <kbd>Hermite</kbd>, as well as
				3018	the <kbd>Parzen</kbd> Sinc windowing function. If only one of the values
				3019	are defined, the other is set so as to generate a 'Keys' type cubic
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	3020	filter. Values meaning was defined by a research paper by
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	3021	Mitchell-Netravali.</dd>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3022
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	3023	<dt>-define filter:filter=<em>filter_function</em></dt>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3024	<dd>Use this function directly as the scaling filter. This will allow
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	3025	you to directly use a windowing filter such as <kbd>Blackman</kbd>,
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3026	rather than as its normal usage as a windowing function for 'Sinc' or
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	3027	'Bessel' functions. If defined, no windowing function is used, unless the
				3028	following expert setting is also defined.</dd>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3029
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	3030	<dt>-define filter:window=<em>filter_function</em></dt>
				3031	<dd>The IIR (infinite impulse response) filters <kbd>Bessel</kbd> and
				3032	<kbd>Sinc</kbd> are windowed (brought down to zero over the defined
				3033	support range) with the given filter. This allows you to specify a filter
				3034	function that is not normally used as a windowing function, such as
				3035	<kbd>Box</kbd>, (which effectively turns off the windowing function),
				3036	to window a <kbd>Sinc</kbd>, or the function the previous setting defined.
				3037	</dd>
				3038
				3039	<dt>-define filter:verbose=<em>1</em></dt>
				3040	<dd>This causes IM to print information on the final internal filter
				3041	selection to standard output. This includes a commented header on the
				3042	filter settings being used, and data allowing the filter weights to be
				3043	easily graphed. </dd>
				3044
				3045	<dd>Note however that some filters are internally defined in terms of other
				3046	filters. The <kbd>Lanczos</kbd> filter for example is defined in terms of
				3047	a <kbd>SincFast</kbd> windowed <kbd>SincFast</kbd> filter, while
				3048	<kbd>Mitchell</kbd> is defined as a <kbd>Cubic</kbd> filter with specific
				3049	'B' and 'C' settings. </dd>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3050
				3051	</dl>
				3052
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	3053	<p>For example, to get a 8 lobe Bessel windowed Bessel filter:</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3054
				3055	<p class='crt'><span class="crtprompt"> $magick> </span><span class='crtin'>convert image.png -filter bessel \ <br/>
				3056	-set filter:window=bessel -set filter:lobes=8 \ <br/>
				3057	-resize 150% image.jpg</span></p>
				3058	<p>Or a raw un-windowed Sinc filter with 4 lobes:</p>
				3059
				3060	<p class='crt'><span class="crtprompt"> $magick> </span><span class='crtin'>convert image.png -set filter:filter=sinc -set filter:lobes=4 \ <br/>
				3061	-resize 150% image.jpg</span></p>
				3062	<p>Note that the use of expert options (except for 'blur' with simple resize
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	3063	filters, and 'verbose' for viewing the internal filter selection), are
				3064	provided for image processing experts who have studied and understood how
				3065	resize filters work. Without this knowledge, and an understanding of the
				3066	definition of the actual filters involved, using expert settings are more
				3067	likely to be detrimental to your image resizing.</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3068
				3069
				3070	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	3071	<h4><a id="flatten"></a>-flatten</h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3072	</div>
				3073
				3074	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>This is a simple alias for the <a href="#layers" >-layers</a> method "flatten".</td><td style='text-align:right;'></td></tr></table>
				3075
				3076
				3077	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	3078	<h4><a id="flip"></a>-flip</h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3079	</div>
				3080
				3081	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>create a <em>mirror image</em>.</td><td style='text-align:right;'></td></tr></table>
				3082
cristy	2dcd682	2011-06-13 16:21:20 +0000	[diff] [blame]	3083	<p>reflect the scanlines in the vertical direction. The image will be mirrored
				3084	upside-down. </p>
				3085
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3086
				3087	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	3088	<h4><a id="floodfill"></a>-floodfill {<em class="arg">+-</em>}<em class="arg">x</em>{<em class="arg">+-</em>}<em class="arg">y</em> <em class="arg">color</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3089	</div>
				3090
cristy	2dcd682	2011-06-13 16:21:20 +0000	[diff] [blame]	3091	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>floodfill the image with color at the specified offset.</td><td style='text-align:right;'></td></tr></table>
				3092
				3093	<p>Flood fill starts from the given 'seed point' which is not gravity effected.
				3094	Any color that matches within <a href="#fuzz" >-fuzz</a> color distance of the
				3095	given <em class="arg">color</em> argument, connected to that 'seed point'
				3096	will be replaced with the current <a href="#fill" >-fill</a> color. </p>
				3097
				3098	<p>Note that if the pixel at the 'seed point' does not itself match the given
				3099	<em class="arg">color</em> (according to <a href="#fuzz" >-fuzz</a>), then no
				3100	action will be taken. </p>
				3101
				3102	<p>This operator works more like the <a href="#opaque" >-opaque</A> option, than
				3103	a more general flood fill that reads the matching color directly at the 'seed point'. For this form of flood fill, look at <a href="#draw" >-draw</a> and its 'color floodfill' drawing method. </p>
				3104
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3105
				3106	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	3107	<h4><a id="flop"></a>-flop</h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3108	</div>
				3109
				3110	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>create a <em>mirror image</em>.</td><td style='text-align:right;'></td></tr></table>
				3111
cristy	2dcd682	2011-06-13 16:21:20 +0000	[diff] [blame]	3112	<p>Reflect the scanlines in the horizontal direction, just like the image in
				3113	a vertical mirror. </p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3114
				3115
				3116	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	3117	<h4><a id="font"></a>-font <em class="arg">name</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3118	</div>
				3119
				3120	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>set the font to use when annotating images with text, or creating labels.</td><td style='text-align:right;'></td></tr></table>
				3121
				3122	<p>To print a complete list of fonts, use the <a href="#list">-list font</a> option (for versions prior to 6.3.6, use 'type' instead of 'font').</p>
				3123
				3124	<p>In addition to the fonts specified by the above pre-defined list, you can
				3125	also specify a font from a specific source. For example <kbd>Arial.ttf</kbd>
				3126	is a TrueType font file, <kbd>ps:helvetica</kbd> is PostScript font, and
				3127	<kbd>x:fixed</kbd> is X11 font.</p>
				3128
				3129	<p>For other settings that affect fonts, see the options <a href="#family">-family</a>, <a href="#stretch">-stretch</a>, <a href="#style">-style</a>, and <a href="#weight">-weight</a>. </p>
				3130
				3131
				3132	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	3133	<h4><a id="foreground"></a>-foreground <em class="arg">color</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3134	</div>
				3135
				3136	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Define the foreground color.</td><td style='text-align:right;'></td></tr></table>
				3137
				3138	<p>The color is specified using the format described under the <a href="#fill">-fill</a> option.</p>
				3139
				3140	<p>The default foreground color is black.</p>
				3141
				3142	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	3143	<h4><a id="format"></a>-format <em class="arg">type</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3144	</div>
				3145
				3146	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>the image format type.</td><td style='text-align:right;'></td></tr></table>
				3147
cristy	4777498	2011-02-15 15:17:19 +0000	[diff] [blame]	3148	<p>When used with the <kbd>mogrify</kbd> utility, this option converts any image to the image <a href="../www/formats.html">format</a> you specify. For a list of image format types supported by ImageMagick, use <a href="#list">-list format</a>.</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3149
				3150	<p>By default the file is written to its original name. However, if the filename extension matches a supported format, the extension is replaced with the image format type specified with <a href="#format">-format</a>. For example, if you specify <em class="arg">tiff</em> as the format type and the input image filename is <em class="arg">image.gif</em>, the output image filename becomes <em class="arg">image.tiff</em>.</p>
				3151
				3152	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	3153	<h4><a id="format_identify_"></a>-format <em class="arg">string</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3154	</div>
				3155
				3156	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>output formatted image characteristics.</td><td style='text-align:right;'>[<a href="../www/identify.html">identify</a>]</td></tr></table>
				3157
				3158	<p>See <a href="../www/escape.html">Format and Print Image Properties</a> for an explanation on how to specify the argument to this option.</p>
				3159
				3160	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	3161	<h4><a id="frame"></a>-frame <em class="arg">geometry</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3162	</div>
				3163
				3164	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Surround the image with a border or beveled frame.</td><td style='text-align:right;'></td></tr></table>
				3165
cristy	bc9539a	2010-08-16 18:06:20 +0000	[diff] [blame]	3166	<p>The color of the border is specified with the <a href="#mattecolor"
				3167	>-mattecolor</a> command line option. </p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3168
cristy	bc9539a	2010-08-16 18:06:20 +0000	[diff] [blame]	3169	<p>See <a href="../www/command-line-processing.html#geometry">Image Geometry</a> for complete details about the <em class="arg">geometry</em> argument. The <em class="arg">size</em> portion of the <em
				3170	class="arg">geometry</em> argument indicates the amount of extra width and
				3171	height that is added to the dimensions of the image. If no offsets are given
				3172	in the <em class="arg">geometry</em> argument, then the border added is
				3173	a solid color. Offsets <em>x</em> and <em>y</em>, if present, specify that
				3174	the width and height of the border is partitioned to form an outer bevel of
				3175	thickness <em>x</em> pixels and an inner bevel of thickness
				3176	<em>y</em> pixels. Negative offsets make no sense as frame arguments.
				3177	</p>
				3178
				3179	<p>The <a href="#frame">-frame</a> option is affected by the current <a
				3180	href="#compose">-compose</a> setting and assumes that this is using the default
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	3181	'<kbd>Over</kbd>' composition method. It generates a image of the appropriate
cristy	bc9539a	2010-08-16 18:06:20 +0000	[diff] [blame]	3182	size with the current <a href="#bordercolor">-bordercolor</a> setting, and then
				3183	draws the frame of four distinct colors close to the current <a
				3184	href="#mattecolor">-mattecolor</a>. The original image is then overlaid onto
				3185	center of this image. This means that with the default compose method of
				3186	'<kbd>Over</kbd>' any transparent parts may be replaced by the current <a
				3187	href="#bordercolor">-bordercolor</a> setting.</p>
				3188
				3189	<p>The image composition is not
				3190	affected by the <a href="#gravity">-gravity</a> option.</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3191
				3192
				3193	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	3194	<h4><a id="frame_import_"></a>-frame</h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3195	</div>
				3196
				3197	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>include the X window frame in the imported image.</td><td style='text-align:right;'>[<a href="../www/import.html">import</a>]</td></tr></table>
				3198
				3199	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	3200	<h4><a id="function"></a>-function <em class="arg">function</em> <em class="arg">parameters</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3201	</div>
				3202
				3203	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Apply a function to channel values.</td><td style='text-align:right;'></td></tr></table>
				3204
				3205	<p>This operator performs calculations based on the given arguments to modify each of the color values for each previously set <a href="#channel">-channel</a> in the image. See <a href="#evaluate">-evaluate</a> for details concerning how the results of the calculations are handled.</p>
				3206
				3207	<p>This is can be considered a multi-argument version of the <a href="#evaluate">-evaluate</a> operator. (Added in ImageMagick 6.4.8−8.)</p>
				3208
				3209	<p>Here, <em class="arg">parameters</em> is a comma-separated list of numerical values. The number of values varies depending on which <em class="arg">function</em> is selected. Choose the <em class="arg">function</em> from:</p>
				3210
				3211	<pre class="text">
cristy	e9a32c3	2011-04-07 01:11:05 +0000	[diff] [blame]	3212	Polynomial
				3213	Sinusoid
				3214	Arcsin
				3215	Arctan
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3216	</pre>
				3217
				3218	<p>To print a complete list of <a href="#function">-function</a> operators, use <a href="#list">-list function</a>. Descriptions follow.</p>
				3219
				3220	<dl class="doc">
				3221	<dt><kbd>Polynomial</kbd></dt>
				3222	<dd>
				3223	<p>The <kbd>Polynomial</kbd> function takes an arbitrary number of parameters, these being the coefficients of a polynomial, in decreasing order of degree. That is, entering</p>
				3224
				3225	<div style="text-align: center">
				3226	-function Polynomial <em>a</em><sub><em>n</em></sub>,<em>a</em><sub><em>n</em>-1</sub>,...<em>a</em><sub>1</sub>,<em>a</em><sub>0</sub>
				3227	</div>
				3228
				3229	<p>will invoke a polynomial function given by</p>
				3230
				3231	<div style="text-align: center">
				3232	<em>a</em><sub><em>n</em></sub> <b><em>u</em></b><sup><em>n</em></sup> +
				3233	<em>a</em><sub><em>n</em>-1</sub> <b><em>u</em></b><sup><em>n</em>-1</sup> +
				3234	··· <em>a</em><sub>1</sub> <b><em>u</em></b> + <em>a</em><sub>0</sub>,
				3235	</div>
				3236
				3237	<p>where <b><em>u</em></b> is pixel's original normalized channel value.</p>
				3238
				3239	<p>The <kbd>Polynomial</kbd> function can be used in place of <kbd>Set</kbd> (the <em>constant</em> polynomial) and <kbd>Add</kbd>, <kbd>Divide</kbd>, <kbd>Multiply</kbd>, and <kbd>Subtract</kbd> (some <em>linear</em> polynomials) of the <a href="#evaluate">-evaluate</a> operator. The <a href="#level">-level</a> operator also affects channels linearly. Some correspondences follow.</p>
				3240
				3241	<table class="doc">
				3242	<col width="35%" />
				3243	<col width="35%" />
				3244	<col width="30%" />
				3245	<tr>
				3246	<td>-evaluate Set <em class="arg">value</em> </td>
				3247	<td>-function Polynomial <em class="arg">value</em></td>
				3248	<td>(Constant functions; set <em class="arg">value</em>×100% gray when channels are RGB.)</td>
				3249	</tr>
				3250	<tr>
				3251	<td>-evaluate Add <em class="arg">value</em> </td>
				3252	<td>-function Polynomial 1,<em class="arg">value</em></td>
				3253	</tr>
				3254	<tr>
				3255	<td>-evaluate Subtract <em class="arg">value</em> </td>
				3256	<td>-function Polynomial 1,−<em class="arg">value</em></td>
				3257	</tr>
				3258	<tr>
				3259	<td>-evaluate Multiply <em class="arg">value</em> </td>
				3260	<td>-function Polynomial <em class="arg">value</em>,0</td>
				3261	</tr>
				3262	<tr>
				3263	<td>+level black% x white%</td>
				3264	<td>-function Polynomial A,B</td>
				3265	<td>(Reduce contrast. Here, A=(white-black)/100 and B=black/100.)</td>
				3266	</tr>
				3267	</table>
				3268
				3269	<p>The <kbd>Polynomial</kbd> function gives great versatility, since polynomials can be used to fit any continuous curve to any degree of accuracy desired.</p>
				3270	</dd>
				3271
				3272	<dt><kbd>Sinusoid</kbd></dt>
				3273	<dd>
				3274	<p>The <kbd>Sinusoid</kbd> function can be used to vary the channel values sinusoidally by setting frequency, phase shift, amplitude, and a bias. These values are given as one to four parameters, as follows,</p>
				3275
				3276	<div style="text-align: center">
				3277	-function <kbd>Sinusoid</kbd> <em class="arg">freq</em>,[<em class="arg">phase</em>,[<em class="arg">amp</em>,[<em class="arg">bias</em>]]]
				3278	</div>
				3279
				3280	<p>where <em>phase</em> is in degrees. (The domain [0,1] of the function corresponds to 0 through <em class="arg">freq</em>×360 degrees.) The result is that if a pixel's normalized channel value is originally <b><em>u</em></b>, its resulting normalized value is given by </p>
				3281
				3282	<div style="text-align: center">
				3283	<em class="arg">amp</em> * sin(2π (<em class="arg">freq</em> * <b><em>u</em></b> + <em class="arg">phase</em> / 360)) + <em class="arg">bias</em>
				3284	</div>
				3285
				3286	<p> For example, the following generates a curve that starts and ends at 0.9 (when <b><em>u</em></b>=0 and 1, resp.), oscillating three times between .7−.2=.5 and .7+.2=.9. </p>
				3287
				3288	<p class="crtsnip">
				3289	-function Sinusoid 3,-90,.2,.7
				3290	</p>
				3291
				3292	<p>The default values of <em class="arg">amp</em> and <em class="arg">bias</em> are both .5. The default for <em class="arg">phase</em> is 0.</p>
				3293
				3294	<p>The <kbd>Sinusoid</kbd> function generalizes <kbd>Sin</kbd> and <kbd>Cos</kbd> of the <a href="#evaluate">-evaluate</a> operator by allowing varying amplitude, phase and bias. The correspondence is as follows.</p>
				3295
				3296	<table class="doc">
				3297	<tr>
				3298	<td>-evaluate Sin <em class="arg">freq</em> </td>
				3299	<td>-function Sinusoid <em class="arg">freq</em>,0 </td>
				3300	</tr>
				3301	<tr>
				3302	<td>-evaluate Cos <em class="arg">freq</em> </td>
				3303	<td>-function Sinusoid <em class="arg">freq</em>,90 </td>
				3304	</tr>
				3305	</table>
				3306	</dd>
				3307
				3308	<dt><kbd>ArcSin</kbd></dt>
				3309	<dd>
				3310	<p>The <kbd>ArcSin</kbd> function generates the inverse curve of a Sinusoid,
				3311	and can be used to generate cylindrical distortion and displacement maps.
				3312	The curve can be adjusted relative to both the input values and output range
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	3313	of values.</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3314
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	3315	<p style="text-align: center">
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3316	-function <kbd>ArcSin</kbd> <em class="arg">width</em>,[<em class="arg">center</em>,[<em class="arg">range</em>,[<em class="arg">bias</em>]]]
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	3317	</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3318
				3319	<p>with all values given in terms of noramlize color values (0.0 for black,
				3320	1.0 for white). Defaulting to values covering the full range from 0.0 to 1.0
				3321	for bout input (<em class="arg">width</em>), and output (<em
				3322	class="arg">width</em>) values. '<code>1.0,0.5,1.0,0.5</code>' </p>
				3323
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	3324	<p style="text-align: center">
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3325	<em class="arg">range</em>/π * asin( 2/<em class="arg">width</em> * ( <b><em>u</em></b> - <em class="arg">center</em> ) ) + <em class="arg">bias</em>
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	3326	</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3327
				3328	</dd>
				3329
				3330	<dt><kbd>ArcTan</kbd></dt>
				3331	<dd>
				3332	<p>The <kbd>ArcTan</kbd> function generates a curve that smooth crosses from
				3333	limit values at infinities, though a center using the given slope value.
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	3334	All these values can be adjusted via the arguments.</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3335
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	3336	<p style="text-align: center">
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3337	-function <kbd>ArcTan</kbd> <em class="arg">slope</em>,[<em class="arg">center</em>,[<em class="arg">range</em>,[<em class="arg">bias</em>]]]
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	3338	</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3339
				3340	<p>Defaulting to '<code>1.0,0.5,1.0,0.5</code>'.
				3341	</p>
				3342
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	3343	<p style="text-align: center">
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3344	<em class="arg">range</em>/π * atan( <em class="arg">slope</em>π ( <b><em>u</em></b> - <em class="arg">center</em> ) ) + <em class="arg">bias</em>
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	3345	</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3346
				3347	</dd>
				3348
				3349	</dl>
				3350
				3351
				3352	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	3353	<h4><a id="fuzz"></a>-fuzz <em class="arg">distance</em>{<em class="arg">%</em>}</h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3354	</div>
				3355
				3356	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Colors within this <em class="arg">distance</em> are considered equal.</td><td style='text-align:right;'></td></tr></table>
				3357
				3358	<p>A number of algorithms search for a target color. By default the color must be exact. Use this option to match colors that are close to the target color in RGB space. For example, if you want to automagically trim the edges of an image with <a href="#trim">-trim</a> but the image was scanned and the target background color may differ by a small amount. This option can account for these differences.</p>
				3359
				3360	<p>The <em class="arg">distance</em> can be in absolute intensity units or, by appending <kbd>%</kbd> as a percentage of the maximum possible intensity (255, 65535, or 4294967295).</p>
				3361
				3362
				3363	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	3364	<h4><a id="fx"></a>-fx <em class="arg">expression</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3365	</div>
				3366
				3367	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>apply a mathematical expression to an image or image channels.</td><td style='text-align:right;'></td></tr></table>
				3368
				3369	<p>If the first character of <em class="arg">expression</em> is <kbd>@</kbd>, the expression is read from a file titled by the remaining characters in the string.</p>
				3370
				3371	<p>See <a href="../www/fx.html">FX, The Special Effects Image Operator</a> for a detailed discussion of this option.</p>
				3372
				3373
				3374	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	3375	<h4><a id="gamma"></a>-gamma <em class="arg">value</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3376	</div>
				3377
				3378	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>level of gamma correction.</td><td style='text-align:right;'></td></tr></table>
				3379
				3380	<p>The same color image displayed on two different workstations may look different due to differences in the display monitor. Use gamma correction to adjust for this color difference. Reasonable values extend from <kbd>0.8</kbd> to <kbd>2.3</kbd>. Gamma less than 1.0 darkens the image and gamma greater than 1.0 lightens it. Large adjustments to image gamma may result in the loss of some image information if the pixel quantum size is only eight bits (quantum range 0 to 255).</p>
				3381
				3382	<p>Gamma adjusts the image's channel values pixel-by-pixel according to a power law, namely, pow(pixel,1/gamma) or pixel^(1/gamma), where pixel is the normalized or 0 to 1 color value. For example, using a value of gamma=2 is the same as taking the square root of the image.</p>
				3383
				3384	<p>You can apply separate gamma values to the red, green, and blue channels of the image with a gamma value list delimited with commas (e.g., <kbd>1.7,2.3,1.2</kbd>).</p>
				3385
				3386	<p>Use <a href="#gamma">+gamma <em class="arg">value</em></a> to set the image gamma level without actually adjusting the image pixels. This option is useful if the image is of a known gamma but not set as an image attribute (e.g. PNG images).</p>
				3387
				3388	<p>Note that gamma adjustments are also available via the <a href="#level">-level</a> operator.</p>
				3389
				3390	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	3391	<h4><a id="gaussian-blur"></a>-gaussian-blur <em class="arg">radius</em><br />-gaussian-blur <em class="arg">radius</em>x<em class="arg">sigma</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3392	</div>
				3393
				3394	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Blur the image with a Gaussian operator.</td><td style='text-align:right;'></td></tr></table>
				3395
cristy	b15553d	2010-07-03 22:53:14 +0000	[diff] [blame]	3396	<p>Convolve the image with a Gaussian or normal distribution using the given
				3397	<em class="arg" >Sigma</em> value. The formula is:</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3398
				3399	<div class="eqn"><img alt="gaussian distribution" width="243px" height="42px" src="../images/gaussian-blur.png"/>
				3400	</div>
				3401
cristy	b15553d	2010-07-03 22:53:14 +0000	[diff] [blame]	3402	<p>The <em class="arg" >Sigma</em> value is the important argument, and
cristy	efb2bdb	2010-11-20 19:35:22 +0000	[diff] [blame]	3403	determines the actual amount of blurring that will take place. </p>
cristy	b15553d	2010-07-03 22:53:14 +0000	[diff] [blame]	3404
				3405	<p>The <em class="arg" >Radius</em> is only used to determine the size of the
cristy	efb2bdb	2010-11-20 19:35:22 +0000	[diff] [blame]	3406	array which will hold the calculated Gaussian distribution. It should be an
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	3407	integer. If not given, or set to zero, IM will calculate the largest possible
cristy	b15553d	2010-07-03 22:53:14 +0000	[diff] [blame]	3408	radius that will provide meaningful results for the Gaussian distribution.
				3409	</p>
				3410
				3411	<p>The larger the <em class="arg" >Radius</em> the radius the slower the
				3412	operation is. However too small a <em class="arg" >Radius</em>, and sever
				3413	aliasing effects may result. As a guideline, <em class="arg" >Radius</em>
				3414	should be at least twice the <em class="arg" >Sigma</em> value, though three
				3415	times will produce a more accurite result. </p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3416
				3417	<p>This differs from the faster <a href="#blur">-blur</a> operator in that a
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	3418	full 2-dimensional convolution is used to generate the weighted average of the
				3419	neighboring pixels. </p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3420
				3421	<p>The <a href="#virtual-pixel">-virtual-pixel</a> setting will determine how
				3422	pixels which are outside the image proper are blurred into the final result.
				3423	</p>
				3424
				3425
				3426	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	3427	<h4><a id="geometry"></a>-geometry <em class="arg">geometry</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3428	</div>
				3429
				3430	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Set the preferred size and location of the image.</td><td style='text-align:right;'></td></tr></table>
				3431
				3432	<p>See <a href="../www/command-line-processing.html#geometry">Image Geometry</a> for complete details about the <em class="arg">geometry</em> argument.</p>
				3433
				3434	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	3435	<h4><a id="gravity"></a>-gravity <em class="arg">type</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3436	</div>
				3437
				3438	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Sets the current gravity suggestion for various other settings and options.</td><td style='text-align:right;'></td></tr></table>
				3439
				3440	<p>Choices include: <kbd>NorthWest</kbd>, <kbd>North</kbd>, <kbd>NorthEast</kbd>,
				3441	<kbd>West</kbd>, <kbd>Center</kbd>, <kbd>East</kbd>, <kbd>SouthWest</kbd>,
				3442	<kbd>South</kbd>, <kbd>SouthEast</kbd>. Use <a href="#list">-list gravity</a> to get a complete
				3443	list of <a href="#gravity">-gravity</a> settings available in your ImageMagick
				3444	installation.</p>
				3445
				3446	<p>The direction you choose specifies where to position text or subimages. For example, a gravity of <kbd>Center</kbd> forces the text to be centered within the image. By default, the image gravity is <kbd>NorthWest</kbd>. See <a href="#draw">-draw</a> for more details about graphic primitives. Only the text primitive of <a href="#draw">-draw</a> affected by the <a href="#gravity">-gravity</a> option.</p>
				3447
				3448	<p>The <a href="#gravity">-gravity</a> option is also used in concert with the <a href="#geometry">-geometry</a> setting and other settings or options that take <em class="arg">geometry</em> as an argument, such as the <a href="#crop">-crop</a> option. </p>
				3449
				3450	<p>If a <a href="#gravity">-gravity</a> setting occurs before another option or setting having a <em class="arg">geometry</em> argument that specifies an offset, the offset is usually applied to the point within the image suggested by the <a href="#gravity">-gravity</a> argument. Thus, in the following command, for example, suppose the file <kbd>image.png</kbd> has dimensions 200x100. The offset specified by the argument to <a href="#region">-region</a> is (−40,+20). The argument to <a href="#gravity">-gravity</a> is <kbd>Center</kbd>, which suggests the midpoint of the image, at the point (100,50). The offset (−40,20) is applied to that point, giving (100−40,50+20)=(60,70), so the specified 10x10 region is located at that point. (In addition, the <a href="#gravity">-gravity</a> affects the region itself, which is <em>centered</em> at the pixel coordinate (60,70). (See <a href="../www/command-line-processing.html#geometry">Image Geometry</a> for complete details about the <em class="arg">geometry</em> argument.)</p>
				3451
cristy	4949d52	2010-03-12 18:41:34 +0000	[diff] [blame]	3452	<p class='crt'><span class="crtprompt"> $magick> </span><span class='crtin'>convert image.png -gravity Center -region 10x10-40+20 \ <br/> -negate output.png</span></p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3453	<p>When used as an option to <a href="../www/composite.html">composite</a>, <a href="#gravity">-gravity</a> gives the direction that the image gravitates within the composite.</p>
				3454
				3455	<p>When used as an option to <a href="../www/montage.html">montage</a>, <a href="#gravity">-gravity</a> gives the direction that an image gravitates within a tile. The default gravity is <kbd>Center</kbd> for this purpose.</p>
				3456
				3457
				3458	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	3459	<h4><a id="green-primary"></a>-green-primary <em class="arg">x,y</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3460	</div>
				3461
				3462	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>green chromaticity primary point.</td><td style='text-align:right;'></td></tr></table>
				3463
				3464
				3465	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	3466	<h4><a id="hald-clut"></a>-hald-clut</h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3467	</div>
				3468
				3469	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>apply a Hald color lookup table to the image.</td><td style='text-align:right;'></td></tr></table>
				3470
				3471	<p>A Hald color lookup table is a 3-dimensional color cube mapped to 2
				3472	dimensions. Create it with the <kbd>HALD:</kbd> prefix (e.g. HALD:8). You
				3473	can apply any color transformation to the Hald image and then use this option
				3474	to apply the transform to the image. </p>
				3475
				3476	<p class='crt'><span class="crtprompt"> $magick> </span><span class='crtin'>convert image.png hald.png -hald-clut transform.png</span></p>
				3477	<p>This option provides a convenient method for you to use Gimp or Photoshop
				3478	to make color corrections to the Hald CLUT image and subsequently apply them
				3479	to multiple images using an ImageMagick script. </p>
				3480
				3481	<p>Note that the representation is only of the normal RGB color space and that
				3482	the whole color value triplet is used for the interpolated lookup of the
				3483	represented Hald color cube image. Because of this the operation is not <a
				3484	href="#channel" >-channel</a> setting effected, nor can it adjust or modify an
				3485	images transparency or alpha/matte channel.</p>
				3486
				3487	<p>See also <a href="#clut" >-clut</a> which provides color value replacement
				3488	of the individual color channels, usally involving a simplier gray-scale
				3489	image. E.g: gray-scale to color replacement, or modification by a histogram
				3490	mapping. </p>
				3491
				3492
				3493	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	3494	<h4><a id="help"></a>-help</h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3495	</div>
				3496
				3497	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>print usage instructions.</td><td style='text-align:right;'></td></tr></table>
				3498
				3499	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	3500	<h4><a id="highlight-color"></a>-highlight-color <em class="arg">color</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3501	</div>
				3502
				3503	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>when comparing images, emphasize pixel differences with this color.</td><td style='text-align:right;'></td></tr></table>
				3504
				3505	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	3506	<h4><a id="iconGeometry"></a>-iconGeometry <em class="arg">geometry</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3507	</div>
				3508
				3509	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>specify the icon geometry.</td><td style='text-align:right;'></td></tr></table>
				3510
				3511	<p>Offsets, if present in the geometry specification, are handled in the same manner as the <a href="#geometry">-geometry</a> option, using X11 style to handle negative offsets.</p>
				3512
				3513	<p>See <a href="../www/command-line-processing.html#geometry">Image Geometry</a> for complete details about the <em class="arg">geometry</em> argument.</p>
				3514
				3515	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	3516	<h4><a id="iconic"></a>-iconic</h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3517	</div>
				3518
				3519	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>iconic animation.</td><td style='text-align:right;'></td></tr></table>
				3520
				3521	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	3522	<h4><a id="identify"></a>-identify</h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3523	</div>
				3524
				3525	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>identify the format and characteristics of the image.</td><td style='text-align:right;'></td></tr></table>
				3526
				3527	<p>This information is printed: image scene number; image name; image size; the image class (<em class="arg">DirectClass</em> or <em class="arg">PseudoClass</em>); the total number of unique colors; and the number of seconds to read and transform the image. Refer to <a href="../www/miff.html">MIFF</a> for a description of the image class.</p>
				3528
cristy	4777498	2011-02-15 15:17:19 +0000	[diff] [blame]	3529	<p>If <a href="#colors">-colors</a> is also specified, the total unique colors in the image and color reduction error values are printed. Refer to <a href="../www/quantize.html">color reduction algorithm</a> for a description of these values.</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3530
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	3531	<p>If <a href="#verbose">-verbose</a> precedes this option, copious
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3532	amounts of image properties are displayed including image statistics, profiles,
				3533	image histogram, and others.</p>
				3534
				3535	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	3536	<h4><a id="ift"></a>-ift</h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3537	</div>
				3538
				3539	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>implements the inverse discrete Fourier transform (DFT).</td><td style='text-align:right;'></td></tr></table>
				3540
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	3541	<p>This option is new as of ImageMagick 6.5.4-3 (and now working for Windows users in ImageMagick 6.6.0-9). It transforms a pair of magnitude and phase images from the frequency domain to a single image in the normal or spatial domain. See for example, <a href="http://en.wikipedia.org/wiki/Fourier_transform">Fourier Transform</a>, <a href="http://en.wikipedia.org/wiki/DFT">Discrete Fourier Transform</a> and <a href="http://en.wikipedia.org/wiki/FFT">Fast Fourier Transform</a>.</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3542
				3543	<p>For example, depending upon the image format used to store the result of the <a href="#fft">-fft</a>, one would use either</p>
				3544
				3545	<p class='crt'><span class="crtprompt"> $magick> </span><span class='crtin'>convert fft_image.miff -ift fft_image_ift.png</span></p>
				3546	<p>or</p>
				3547
				3548	<p class='crt'><span class="crtprompt"> $magick> </span><span class='crtin'>convert fft_image-0.png fft_image-1.png -ift fft_image_ift.png</span></p>
				3549
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	3550	<p>The resulting image may need to be cropped due to padding introduced when the original image, prior to the <a href="#fft">-fft</a> or <a href="#fft">+fft</a>, was not square or even dimensioned. Any padding is at the right and/or bottom sides of the image.</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3551
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	3552	<p>The <a href="http://www.fftw.org/">FFTW</a> delegate library is required to use <a href="#ift">-ift</a>.</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3553
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	3554	<p>Use <a href="#ift">+ift</a> (with HDRI enabled) to transform a pair of real and imaginary images from the frequency domain to a single image in the normal (spatial) domain.</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3555
				3556	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	3557	<h4><a id="immutable"></a>-immutable</h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3558	</div>
				3559
				3560	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>make image immutable.</td><td style='text-align:right;'></td></tr></table>
				3561
				3562	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	3563	<h4><a id="implode"></a>-implode <em class="arg">factor</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3564	</div>
				3565
				3566	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>implode image pixels about the center.</td><td style='text-align:right;'></td></tr></table>
				3567
				3568	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	3569	<h4><a id="insert"></a>-insert <em class="arg">index</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3570	</div>
				3571
				3572	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>insert the last image into the image sequence.</td><td style='text-align:right;'></td></tr></table>
				3573
				3574	<p>This option takes last image in the current image sequence and inserts it at the given index. If a negative index is used, the insert position is calculated before the last image is removed from the sequence. As such <kbd>-insert -1</kbd> will result in no change to the image sequence.</p>
				3575
				3576	<p>The <kbd>+insert</kbd> option is equivalent to <kbd>-insert -1</kbd>. In other words, insert the last image, at the end of the current image sequence. Consequently this has no effect on the image sequence order.</p>
				3577
				3578	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	3579	<h4><a id="intent"></a>-intent <em class="arg">type</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3580	</div>
				3581
				3582	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>use this type of rendering intent when managing the image color.</td><td style='text-align:right;'></td></tr></table>
				3583
				3584	<p>Use this option to affect the color management operation of an image (see <a href="#profile">-profile</a>). Choose from these intents: <kbd>Absolute, Perceptual, Relative, Saturation</kbd>.</p>
				3585
				3586	<p>The default intent is undefined.</p>
				3587
				3588	<p>To print a complete list of rendering intents, use <a href="#list">-list intent</a>.</p>
				3589
				3590	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	3591	<h4><a id="interlace"></a>-interlace <em class="arg">type</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3592	</div>
				3593
				3594	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>the type of interlacing scheme.</td><td style='text-align:right;'></td></tr></table>
				3595
				3596	<p>Choose from:</p>
				3597
				3598	<pre class="text">
cristy	e9a32c3	2011-04-07 01:11:05 +0000	[diff] [blame]	3599	none
				3600	line
				3601	plane
				3602	partition
				3603	JPEG
				3604	GIF
				3605	PNG
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3606	</pre>
				3607
				3608	<p>This option is used to specify the type of interlacing scheme for raw image formats such as <kbd>RGB</kbd> or <kbd>YUV</kbd>.</p>
				3609
				3610	<p><kbd>None</kbd> means do not interlace (RGBRGBRGBRGBRGBRGB...),</p>
				3611
				3612	<p><kbd>Line</kbd> uses scanline interlacing (RRR...GGG...BBB...RRR...GGG...BBB...), and.</p>
				3613
				3614	<p><kbd>Plane</kbd> uses plane interlacing (RRRRRR...GGGGGG...BBBBBB...).</p>
				3615
				3616	<p><kbd>Partition</kbd> is like plane except the different planes are saved to individual files (e.g. image.R,
				3617	image.G, and image.B).</p>
				3618
				3619	<p>Use <kbd>Line</kbd> or <kbd>Plane</kbd> to create an <kbd>interlaced PNG</kbd> or <kbd>GIF</kbd> or <kbd>progressive JPEG</kbd>
				3620	image.</p>
				3621
				3622	<p>To print a complete list of interlacing schemes, use <a href="#list">-list interlace</a>.</p>
				3623
				3624	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	3625	<h4><a id="interpolate"></a>-interpolate <em class="arg">type</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3626	</div>
				3627
				3628	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Set the pixel color interpolation method to use when looking up a color based on a floating point or real value.</td><td style='text-align:right;'></td></tr></table>
				3629
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	3630	<p>When looking up the color of a pixel using a non-integer floating point
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3631	value, you typically fall in between the pixel colors defined by the source
				3632	image. This setting determines how the color is determined from the colors of
				3633	the pixels surrounding that point. That is how to determine the color of a
				3634	point that falls between two, or even four different colored pixels. </p>
				3635
				3636	<pre class="text">
cristy	e9a32c3	2011-04-07 01:11:05 +0000	[diff] [blame]	3637	integer The color of the top-left pixel (floor function)
				3638	nearest-neighbor The nearest pixel to the lookup point (rounded function)
				3639	average The average color of the surrounding four pixels
				3640	bilinear A double linear interpolation of pixels (the default)
				3641	mesh Divide area into two flat triangular interpolations
				3642	bicubic Fitted bicubic-spines of surrounding 16 pixels
				3643	spline Direct spline curves (colors are blurred)
				3644	filter Use resize <a href="#filter">-filter</a> settings
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3645	</pre>
				3646
				3647	<p>This most important for distortion operators such as <a href="#distort"
				3648	>-distort</a>, <a href="#implode" >-implode</a>, <a href="#transform"
				3649	>-transform</a> and <a href="#fx" >-fx</a>. </p>
				3650
				3651	<p>To print a complete list of interpolation methods, use <a href="#list">-list interpolate</a>.</p>
				3652
				3653	<p>See also <a href="#virtual-pixel" >-virtual-pixel</a>, for control of the
				3654	lookup for positions outside the boundaries of the image. </p>
				3655
				3656
				3657	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	3658	<h4><a id="interline-spacing"></a>-interline-spacing <em class="arg">value</em></h4>
cristy	f3bb478	2009-09-08 13:10:04 +0000	[diff] [blame]	3659	</div>
				3660
				3661	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>the space between two text lines.</td><td style='text-align:right;'></td></tr></table>
				3662
				3663	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	3664	<h4><a id="interword-spacing"></a>-interword-spacing <em class="arg">value</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3665	</div>
				3666
				3667	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>the space between two words.</td><td style='text-align:right;'></td></tr></table>
				3668
				3669	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	3670	<h4><a id="kerning"></a>-kerning <em class="arg">value</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3671	</div>
				3672
				3673	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>the space between two letters.</td><td style='text-align:right;'></td></tr></table>
				3674
				3675	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	3676	<h4><a id="label"></a>-label <em class="arg">name</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3677	</div>
				3678
				3679	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>assign a label to an image.</td><td style='text-align:right;'></td></tr></table>
				3680
cristy	71a3f60	2010-09-15 12:38:16 +0000	[diff] [blame]	3681	<p>Use this option to assign a specific label to the image, as it is read in
				3682	or created. You can use the <a href="#set" >-set</a> operation to re-assign
				3683	a the labels of images already read in. Image formats such as TIFF, PNG,
				3684	MIFF, supports saving the label information with the image.</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3685
cristy	71a3f60	2010-09-15 12:38:16 +0000	[diff] [blame]	3686	<p>When saving an image to a <em class="arg">PostScript</em> file, any label
				3687	assigned to an image is used as a header string to print above the postscript
				3688	image. </p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3689
cristy	bc9539a	2010-08-16 18:06:20 +0000	[diff] [blame]	3690	<p>You can include the image filename, type, width, height, or other image
				3691	attribute by embedding special format character. See <a href="../www/escape.html">Format and Print Image
				3692	Properties</a> for details of the percent escape codes.</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3693
				3694	<p>For example,</p>
				3695
				3696	<p class="crtsnip">
				3697	-label "%m:%f %wx%h" bird.miff
				3698	</p>
				3699
cristy	71a3f60	2010-09-15 12:38:16 +0000	[diff] [blame]	3700	<p>assigns an image label of <kbd>MIFF:bird.miff 512x480</kbd> to the
				3701	"<kbd>bird.miff</kbd>" image and whose width is 512 and height is 480, as it
				3702	is read in. If a <a href="#label">+label</a> option was used instead, any
				3703	existing label present in the image would be used. You can remove all labels
				3704	from an image by assigning the empty string. </p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3705
cristy	71a3f60	2010-09-15 12:38:16 +0000	[diff] [blame]	3706	<p>A label is not drawn on the image, but is embedded in the image datastream
				3707	via <em>Label</em> tag or similar mechanism. If you want the label to be
				3708	visible on the image itself, use the <a href="#draw">-draw</a> option, or
				3709	during the final processing in the creation of a image montage.</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3710
cristy	71a3f60	2010-09-15 12:38:16 +0000	[diff] [blame]	3711	<p>If the first character of <em class="arg">string</em> is <em
				3712	class="arg">@</em>, the image label is read from a file titled by the
				3713	remaining characters in the string. Labels in a file are literal, no embedded
				3714	formatting characters are recognized.</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3715
				3716
				3717	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	3718	<h4><a id="lat"></a>-lat <em class="arg">width</em><br />-lat <em class="arg">width</em>x<em class="arg">height</em>{<em class="arg">+-</em>}<em class="arg">offset</em>{<em class="arg">%</em>}</h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3719	</div>
				3720
				3721	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>perform local adaptive threshold.</td><td style='text-align:right;'></td></tr></table>
				3722
				3723	<p>Adaptively threshold each pixel based on the value of pixels in a
				3724	surrounding window. If the current pixel is lighter than this average plus
				3725	the optional <kbd>offset</kbd>, then it is made white, otherwise it is made
				3726	black. Small variations in pixel values such as found in scanned documents
				3727	can be ignored if offset is positive. A negative offset will make it more
				3728	sensitive to those small variations. </p>
				3729
				3730	<p>This is commonly used to threshold images with an uneven background. It is
				3731	based on the assumption that average color of the small window is the
				3732	the local background color, from which to separate the forground color. </p>
				3733
				3734
				3735	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	3736	<h4><a id="layers"></a>-layers <em class="arg">method</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3737	</div>
				3738
				3739	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>handle multiple images forming a set of image layers or animation frames.</td><td style='text-align:right;'></td></tr></table>
				3740
				3741	<p>Perform various image operation methods to a ordered sequence of images
				3742	which may represent either a set of overlaid 'image layers', a GIF disposal
				3743	animation, or a fully-'coalesced' animation sequence. </p>
				3744
				3745	<table class="doc">
				3746	<tbody>
				3747	<tr valign="top">
				3748	<th align="left" style="width: 8%">Method</th>
				3749	<th align="left">Description</th>
				3750	</tr>
				3751
				3752	<tr valign="top">
				3753	<td valign="top">compare-any</td>
				3754	<td valign="top">Crop the second and later frames to the smallest rectangle
				3755	that contains all the differences between the two images. No GIF <a
				3756	href="#dispose" >-dispose</a> methods are taken into account. </td>
				3757	</tr>
				3758
				3759	<tr><td></td><td>This exactly the same as the <a href="#deconstruct"
				3760	>-deconstruct</a> operator, and does not preserve animations normal
				3761	working, especially when animation used layer disposal methods such as
				3762	'<kbd>Previous</kbd>' or '<kbd>Background</kbd>'. </td>
				3763	</tr>
				3764
				3765	<tr valign="top">
				3766	<td valign="top">compare-clear</td>
				3767	<td valign="top">As '<kbd>compare-any</kbd>' but crop to the bounds of any
				3768	opaque pixels which become transparent in the second frame. That is the
				3769	smallest image needed to mask or erase pixels for the next frame. </td>
				3770	</tr>
				3771
				3772	<tr valign="top">
				3773	<td valign="top">compare-overlay</td>
				3774	<td valign="top">As '<kbd>compare-any</kbd>' but crop to pixels that add
				3775	extra color to the next image, as a result of overlaying color pixels.
				3776	That is the smallest single overlaid image to add or change colors. </td>
				3777	</tr>
				3778
				3779	<tr><td></td><td>This can be used with the <a href="#compose" >-compose</a> alpha
				3780	composition method '<kbd>change-mask</kbd>', to reduce the image to
				3781	just the pixels that need to be overlaid. </td>
				3782	</tr>
				3783
				3784	<tr valign="top">
				3785	<td valign="top">coalesce</td>
				3786	<td valign="top">Equivalent to a call to the <a href="#coalesce"
				3787	>-coalesce</a> operator. Apply the layer disposal methods set in the
				3788	current image sequence to form a fully defined animation sequence, as
				3789	it should be displayed. Effectively converting a GIF animation into a
				3790	'film strip'-like animation. </td>
				3791	</tr>
				3792
				3793	<tr valign="top">
				3794	<td valign="top">composite</td>
				3795	<td valign="top">Alpha Composition of two image lists, separated by a
				3796	"<kbd>null:</kbd>" image, with the destination image list first, and
				3797	the source images last. An image from each list are composited
				3798	together until one list is finished. The separator image and source
				3799	image lists are removed. </td>
				3800	</tr>
				3801
				3802
cristy	bac7a16	2010-06-15 19:57:29 +0000	[diff] [blame]	3803	<tr><td></td>
				3804	<td>The <a href="#geometry" >-geometry</a> offset is adjusted according
				3805	to <a href="#gravity" >-gravity</a> in accordance of the virtual
				3806	canvas size of the first image in each list. Unlike a normal <a
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3807	href="#composite" >-composite</a> operation, the canvas offset is also
cristy	bac7a16	2010-06-15 19:57:29 +0000	[diff] [blame]	3808	added to the final composite positioning of each image. </td> </tr>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3809
cristy	bac7a16	2010-06-15 19:57:29 +0000	[diff] [blame]	3810	<tr><td></td>
				3811	<td>If one of the image lists only contains one image, that image is
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3812	applied to all the images in the other image list, regardless of which
				3813	list it is. In this case it is the image meta-data of the list which
				3814	preserved. </td>
				3815	</tr>
				3816
				3817
				3818	<tr valign="top">
				3819	<td valign="top">dispose</td>
				3820	<td valign="top">This like '<kbd>coalesce</kbd>' but shows the look of
				3821	the animation after the layer disposal method has been applied, before
				3822	the next sub-frame image is overlaid. That is the 'dispose' image that
				3823	results from the application of the GIF <a href="#dispose"
				3824	>-dispose</a> method. This allows you to check what
				3825	is going wrong with a particular animation you may be developing.
				3826	</td>
				3827	</tr>
				3828
				3829	<tr valign="top">
				3830	<td valign="top">flatten</td>
				3831	<td valign="top">Create a canvas the size of the first images virtual
				3832	canvas using the current <a href="#background" >-background</a> color,
				3833	and <a href="#compose" >-compose</a> each image in turn onto that
				3834	canvas. Images falling outside that canvas is clipped. Final
				3835	image will have a zero virtual canvas offset. </td>
				3836	</tr>
				3837
cristy	bac7a16	2010-06-15 19:57:29 +0000	[diff] [blame]	3838	<tr><td></td>
				3839	<td>This usally used as one of the final 'image layering' operations
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3840	overlaying all the prepared image layers into a final image. </td>
				3841	</tr>
				3842
cristy	bac7a16	2010-06-15 19:57:29 +0000	[diff] [blame]	3843	<tr><td></td>
				3844	<td>For a single image this method can also be used to fillout a virtual
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3845	canvas with real pixels, or to underlay a opaque color to remove
				3846	transparency from an image.</td>
				3847	</tr>
				3848
				3849
				3850	<tr valign="top">
				3851	<td valign="top">merge</td>
				3852	<td valign="top">As 'flatten' method but merging all the given image
cristy	10549a1	2011-05-15 19:04:46 +0000	[diff] [blame]	3853	layers to create a new layer image just large enough to hold all the
				3854	image without clipping or extra space. The new images virtual offset
				3855	will preserve the position of the new layer, even if this offset is
				3856	negative. The virtual canvas size of the first image is preserved.
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3857	</td>
cristy	10549a1	2011-05-15 19:04:46 +0000	[diff] [blame]	3858	</tr>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3859
cristy	10549a1	2011-05-15 19:04:46 +0000	[diff] [blame]	3860	<tr><td></td><td>Caution is advised when handling image layers with
				3861	negative offsets as few image file formats handle them correctly.
				3862	Following this operation methd with <a href="#repage" >+repage</a>
				3863	will remove the layer offset, and create a image in which all the
				3864	overlaid image positions relative to each other is preserved, though
				3865	not nessaraily exactly where you specified them.
				3866	</td>
				3867	</tr>
				3868
				3869	<tr><td></td><td>See also 'trim-bounds' below whcih is closely related but
				3870	without doing the'flatten' to merge the images together. </td>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3871	</tr>
				3872
				3873	<tr valign="top">
				3874	<td valign="top">mosaic</td>
				3875	<td valign="top">As 'flatten' method but expanding the initial canvas size
cristy	10549a1	2011-05-15 19:04:46 +0000	[diff] [blame]	3876	of the first image in a positive direction only so as to hold all the
				3877	image layers. However as a virtual canvas is 'locked' to the origin,
				3878	by its own definition, image layers with a negative offsets will still
				3879	become clipped by the top and left edges. See 'merge' or 'trim-bounds'
				3880	if this could be a problem. </td>
				3881
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3882	</tr>
				3883
cristy	10549a1	2011-05-15 19:04:46 +0000	[diff] [blame]	3884	<tr><td></td><td>This method is commonly used to layout individual image
				3885	using various offset but without knowing the final canvas size. The
				3886	resulting image will, like 'flatten' not have any virtual offset, so
				3887	can be saved to any image file format. </td>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3888	</tr>
				3889
				3890
				3891	<tr valign="top">
				3892	<td valign="top">optimize</td>
				3893	<td valign="top">Optimize a coalesced animation, into GIF animation using
				3894	a number of general techniques. This currently a short cut to
				3895	apply both the '<kbd>optimize-frame</kbd>', and
				3896	'<kbd>optimize-transparency</kbd>' methods but may be expanded to
				3897	include other optimization methods as they are developed. </td>
				3898	</tr>
				3899
				3900	<tr valign="top">
				3901	<td valign="top">optimize-frame</td>
				3902	<td valign="top">Optimize a coalesced animation, into GIF animation by
				3903	reducing the number of pixels per frame as much as possible by
				3904	attempting to pick the best layer disposal method to use, while ensuring
				3905	the result will continue to animate properly. </td>
				3906	</tr>
				3907
cristy	10549a1	2011-05-15 19:04:46 +0000	[diff] [blame]	3908	<tr><td></td><td> There is no guarantee that the best optimization is found.
				3909	But then no reasonably fast GIF optimization algorithm can do this.
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3910	However this does seem to do better than most other GIF frame
				3911	optimizers seen. </td>
				3912	</tr>
				3913
				3914	<tr valign="top">
				3915	<td valign="top">optimize-plus</td>
				3916	<td valign="top">As '<kbd>optimize-frame</kbd>' but attempt to improve the
				3917	overall optimization by adding extra frames to the animation, without
				3918	changing the final look or timing of the animation. The frames are
				3919	added to attempt to separate the clearing of pixels from the
				3920	overlaying of new additional pixels from one animation frame to the
				3921	next. If this does not improve the optimization (for the next frame
				3922	only), it will fall back to the results of the previous normal
				3923	'<kbd>optimize-frame</kbd>' technique. </td>
				3924	</tr>
				3925
cristy	10549a1	2011-05-15 19:04:46 +0000	[diff] [blame]	3926	<tr><td></td><td>There is the possibility that the change in the disposal
				3927	style will result in a worsening in the optimization of later frames,
				3928	though this is unlikely. In other words there no guarantee that it is
				3929	better than the normal '<kbd>optimize-frame</kbd>' technique. For some
				3930	animations however you can get a vast improvement in the final
				3931	animation size. </td>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3932	</tr>
				3933
				3934	<tr valign="top">
				3935	<td valign="top">optimize-transparency</td>
				3936	<td valign="top">Given a GIF animation, replace any pixel in the sub-frame
				3937	overlay images with transparency, if it does not change the resulting
				3938	animation by more than the current <a href="#fuzz" >-fuzz</a> factor.
				3939	</td>
				3940	</tr>
				3941
cristy	10549a1	2011-05-15 19:04:46 +0000	[diff] [blame]	3942	<tr><td></td><td>This should allow a existing frame optimized GIF animation
				3943	to compress into a smaller file size due to larger areas of one
				3944	(transparent) color rather than a pattern of multiple colors repeating
				3945	the current disposed image of the last frame. </td>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3946	</tr>
				3947
				3948	<tr valign="top">
				3949	<td valign="top">remove-dups</td>
				3950	<td valign="top">Remove (and merge time delays) of duplicate consecutive
				3951	images, so as to simplify layer overlays of coalesced animations.
				3952	</td>
				3953	</tr>
				3954
cristy	10549a1	2011-05-15 19:04:46 +0000	[diff] [blame]	3955	<tr><td></td><td>Usually this a result of using a constant time delay
				3956	across the whole animation, or after a larger animation was split into
				3957	smaller sub-animations. The duplicate frames could also have been
				3958	used as part of some frame optimization methods. </td>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3959	</tr>
				3960
				3961	<tr valign="top">
				3962	<td valign="top">remove-zero</td>
				3963	<td valign="top">Remove any image with a zero time delay, unless ALL the
				3964	images have a zero time delay (and is not a proper timed animation, a
				3965	warning is then issued). </td>
				3966	</tr>
				3967
cristy	10549a1	2011-05-15 19:04:46 +0000	[diff] [blame]	3968	<tr><td></td><td>In a GIF animation, such images are usually frames which
				3969	provide partial intermediary updates between the frames that are
				3970	actually displayed to users. These frames are usally added for
				3971	improved frame optimization in GIF animations. </td>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3972	</tr>
				3973
				3974	<tr valign="top">
				3975	<td valign="top">trim-bounds</td>
				3976	<td valign="top">Find the bounds of all the images in the current
				3977	image sequence, then adjust the offsets so all images are contained on
cristy	10549a1	2011-05-15 19:04:46 +0000	[diff] [blame]	3978	a minimal positive canvas. None of the image data is modified or
				3979	merged, only the individual image virtual canvas size and offset.
				3980	All the images is given the same canvas size, and and will have
				3981	a positive offset, but will remain in the same position relative to
				3982	each other. As a result of the minimal canvas size at least one image
				3983	will touch every edge of that canvas. The image data touching those
				3984	edges however may be transparent. </td>
				3985	</tr>
				3986
				3987	<tr><td></td><td>The result is much like if you used 'merge' followed by a
				3988	<a href="#repage" >+repage</a> option, except that all the images
				3989	have been kept separate. If 'flatten' is used after using
				3990	'trim-bounds' you will get the same result. </td>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	3991	</tr>
				3992
				3993	</tbody>
				3994	</table>
				3995
				3996	<p>To print a complete list of layer types, use <a href="#list">-list layers</a>.</p>
				3997
				3998	<p>The operators <a href="#coalesce" >-coalesce</a>, <a href="#deconstruct"
				3999	>-deconstruct</a>, <a href="#flatten" >-flatten</a>, and <a href="#mosaic"
cristy	10549a1	2011-05-15 19:04:46 +0000	[diff] [blame]	4000	>-mosaic</a> are only aliases for the above methods and may be depreciated in
				4001	the future. Also see <a href="#page" >-page</a>, <a href="#repage"
				4002	>-repage</a> operators, the <a href="#compose" >-compose</a> setting, and the
				4003	GIF <a href="#dispose" >-dispose</a> and <a href="#delay" >-delay</a>
				4004	settings. </p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4005
				4006
				4007	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	4008	<h4><a id="level"></a>-level <em class="arg">black_point</em>{,<em class="arg">white_point</em>}{<em class="arg">%</em>}{,<em class="arg">gamma</em>}</h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4009	</div>
				4010
				4011	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>adjust the level of image channels.</td><td style='text-align:right;'></td></tr></table>
				4012
				4013	<p>Given one, two or three values delimited with commas: black-point,
				4014	white-point, gamma (for example: 10,250,1.0 or 2%,98%,0.5). The black and
				4015	white points range from 0 to <em class="QR">QuantumRange</em>, or from 0 to 100%; if the white
				4016	point is omitted it is set to (<em class="QR">QuantumRange</em> - black_point), so as to center
				4017	contrast changes. If a <kbd>%</kbd> sign is present anywhere in the string,
				4018	both black and white points are percentages of the full color range. Gamma
				4019	will do a <a href="#gamma">-gamma</a> adjustment of the values. If it is
				4020	omitted, the default of 1.0 (no gamma correction) is assumed.</p>
				4021
				4022	<p>In normal usage (<kbd>-level</kbd>) the image values are stretched so that
				4023	the given '<kbd>black_point</kbd>' value in the original image is set to
				4024	zero (or black), while the given '<kbd>white_point</kbd>' value is set to
				4025	<em class="QR">QuantumRange</em> (or white). This provides you with direct contrast adjustments
				4026	to the image. The '<kbd>gamma</kbd>' of the resulting image will then be
				4027	adjusted. </p>
				4028
				4029	<p>From ImageMagick v6.4.1-9 using the plus form of the operator (<kbd>+level</kbd>) or
				4030	adding the special '!' flag anywhere in the argument list, will cause the
				4031	operator to do the reverse of the level adjustment. That is a zero, or
				4032	<em class="QR">QuantumRange</em> value (black, and white, resp.) in the original image, is
				4033	adjusted to the given level values, allowing you to de-contrast, or compress
				4034	the channel values within the image. The '<kbd>gamma</kbd>' is adjusted before the level adjustment to de-contrast the image is made. </p>
				4035
				4036	<p>Only the channels defined by the current <a href="#channel">-channel</a>
				4037	setting are adjusted (defaults to RGB color channels only), allowing you to
				4038	limit the effect of this operator. </p>
				4039
				4040	<p>Please note that the transparency channel is treated as 'matte'
				4041	values (0 is opaque) and not as 'alpha' values (0 is transparent).</p>
				4042
				4043
				4044	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	4045	<h4><a id="level-colors"></a>-level-colors {<em
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4046	class="arg">black_color</em>}{,}{<em class="arg">white_color</em>}</h4>
				4047	</div>
				4048
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	4049	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>adjust the level of an image using the provided dash separated colors.</td><td style='text-align:right;'></td></tr></table>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4050
				4051	<p>This function is exactly like <a href="#level">-level</a>, except that the
				4052	value value for each color channel is determined by the
				4053	'<kbd>black_color</kbd>' and '<kbd>white_color</kbd>' colors given (as
				4054	described under the <a href="#fill">-fill</a> option). </p>
				4055
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	4056	<p>This effectually means the colors provided to <kbd>-level-colors</kbd>
				4057	is mapped to become 'black' and 'white' respectively, with all the other
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4058	colors linearly adjusted (or clipped) to match that change. Each channel is
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	4059	adjusted separately using the channel values of the colors specified. </p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4060
				4061	<p>On the other hand the plus form of the operator (<kbd>+level-colors</kbd>)
				4062	will map the image color 'black' and 'white' to the given colors
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	4063	respectively, resulting in a gradient (de-contrasting) tint of the image to
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4064	those colors. This can also be used to convert a plain gray-scale image into a
				4065	one using the gradient of colors specified. </p>
				4066
				4067	<p>By supplying a single color with a comma separator either before or after
				4068	that color, will just replace the respective 'black' or 'white' point
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	4069	respectively. But if no comma separator is provided, the given color is
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4070	used for both the black and white color points, making the operator either
				4071	threshold the images around that color (- form) or set all colors to that
				4072	color (+ form). </p>
				4073
				4074
				4075	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	4076	<h4><a id="limit"></a>-limit <em class="arg">type value</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4077	</div>
				4078
				4079	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Set the pixel cache resource limit.</td><td style='text-align:right;'></td></tr></table>
				4080
				4081	<p>Choose from: <kbd>area</kbd>, <kbd>disk</kbd>, <kbd>file</kbd>, <kbd>map</kbd>, <kbd>memory</kbd>, <kbd>threads</kbd>, or <kbd>time</kbd>.</p>
				4082
cristy	6b63665	2009-12-05 17:16:11 +0000	[diff] [blame]	4083	<p>The value for <kbd>file</kbd> is in number of files. The other limits are in bytes. By default the limits are 768 files, 2GB of image area, 1.5GiB memory, 8GiB memory map, and 18.45EB of disk. These limits are adjusted relative to the available resources on your computer if this information is available. When any limit is reached, ImageMagick fails in some fashion but attempts to take compensating actions, if possible. For example, the following limits memory:</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4084
				4085	<p class="crtsnip">
cristy	d934d10	2009-10-10 12:55:13 +0000	[diff] [blame]	4086	-limit memory 32MiB -limit map 64MiB
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4087	</p>
				4088
				4089	<p>Use <a href="#list">-list resource</a> to list the current limits. For example, our system shows these limits:</p>
				4090
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	4091	<p class='crt'><span class="crtprompt"> $magick> </span><span class='crtin'>identify -list resource</span><span class='crtout'></span></p><pre class="text">
cristy	e9a32c3	2011-04-07 01:11:05 +0000	[diff] [blame]	4092	File Area Memory Map Disk Thread Time
				4093	------------------------------------------------------------------------------
				4094	768 12.404GB 8.6642GiB 23.104GiB 18.446744EB 8 unlimited
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	4095	</pre>
				4096
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4097	<p>Requests for pixel storage to keep intermediate images are satisfied by one of three resource categories: in-memory pool, memory-mapped files pool, and disk pool (in that order) depending on the <a href="../www/command-line-options.html#limit">‑limit</a> settings and whether the system honors a resource request. If the total size of allocated pixel storage in the given pool reaches the corresponding limit, the request is passed to the next pool. Additionally, requests that exceed the <kbd>area</kbd> limit automagically are allocated on disk.</p>
				4098
				4099	<p>To illustrate how ImageMagick utilizes resource limits, consider a typical image resource request. First, ImageMagick tries to allocate the pixels in memory. The request might be denied if the resource request exceeds the <kbd>memory</kbd> limit or if the system does not honor the request. If a memory request is not honored, the pixels are allocated to disk and the file is memory-mapped. However, if the allocation request exceeds the <kbd>map</kbd> limit, the resource allocation goes to disk. In all cases, if the resource request exceeds the <kbd>area</kbd> limit, the pixels are automagically cached to disk. If the disk has a hard limit, the program fails.</p>
				4100
				4101	<p>In most cases you simply do not need to concern yourself with resource limits. ImageMagick chooses reasonable defaults and most images do not tax your computer resources. Where limits do come in handy is when you process images that are large or on shared systems where ImageMagick can consume all or most of the available memory. In this case, the ImageMagick workflow slows other processes or, in extreme cases, brings the system to a halt. Under these circumstances, setting limits give some assurances that the ImageMagick workflow will not interfere with other concurrent uses of the computer. For example, assume you have a web interface that processes images uploaded from the Internet. To assure ImageMagick does not exceed 10mb of memory you can simply set the area limit to 10mb:</p>
				4102
				4103	<p class="crtsnip">
				4104	-limit area 10mb
				4105	</p>
				4106
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	4107	<p>Now whenever a large image is processed, the pixels are automagically cached to disk instead of memory. This of course implies that large images typically process very slowly, simply because pixel processing in memory can be an order of magnitude faster than on disk. Because your web site users might inadvertently upload a huge image to process, you should set a disk limit as well:</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4108
				4109	<p class="crtsnip">
				4110	-limit area 10mb -limit disk 500mb
				4111	</p>
				4112
				4113	<p>Here ImageMagick stops processing if an image requires more than 500MB of disk storage.</p>
				4114
				4115	<p>In addition to command-line resource limit option, resources can be set with <a href="../www/resources.html#environment">environment variables</a>. Set the environment variables <kbd>MAGICK_AREA_LIMIT</kbd>, <kbd>MAGICK_DISK_LIMIT</kbd>, <kbd>MAGICK_FILE_LIMIT</kbd>, <kbd>MAGICK_MEMORY_LIMIT</kbd>, <kbd>MAGICK_MAP_LIMIT</kbd>, <kbd>MAGICK_THREAD_LIMIT</kbd>, <kbd>MAGICK_TIME_LIMIT</kbd> for limits of image area, disk space, open files, heap memory, memory map, number of threads of execution, and maximum elapsed time in seconds respectively.</p>
				4116
				4117	<p> Inquisitive users can try adding <a href="#debug">-debug cache</a> to their commands and then scouring the generated output for references to the pixel cache, in order to determine how the pixel cache was allocated and how resources were consumed. Advanced Unix/Linux users can pipe that output through <kbd>grep memory\|open\|destroy\|disk</kbd> for more readable sifting.
				4118	</p>
				4119
				4120	<p>For more about ImageMagick's use of resources, see the section <b>Cache Storage and Resource Requirements</b> on the <a href="../www/architecture.html#cache">Architecture</a> page.
				4121	</p>
				4122
				4123	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	4124	<h4><a id="linear-stretch"></a>-linear-stretch <em class="arg">black-point</em><br />-linear-stretch <em class="arg">black-point</em>{x<em class="arg">white-point</em>}{<em class="arg">%</em>}}</h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4125	</div>
				4126
				4127	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Linear with saturation stretch.</td><td style='text-align:right;'></td></tr></table>
				4128
cristy	d934d10	2009-10-10 12:55:13 +0000	[diff] [blame]	4129	<p>This is very similar to <a href="#contrast-stretch" >-contrast-stretch</a>,
				4130	and uses a 'histogram bin' to determine the range of color values that needs to
				4131	be stretched. However it then stretchs those colors using the <a
				4132	href="#level" >-level</a> operator.</p>
				4133
				4134	<p>As such while the initial determination may have 'binning' round off
				4135	effects, the image colors are stretched mathematically, rather than using the
				4136	histogram bins. This makes the operator more accurate. </p>
				4137
				4138	<p>note however that a <a href="#linear-stretch" >-linear-stretch</a> of
				4139	'<kbd>0</kbd>' does nothing, while a value of '<kbd>1</kbd>' does a near
				4140	perfect stretch of the color range. </p>
				4141
				4142	<p>See also <a href="#auto-level" >-auto-level</a> for a 'perfect'
				4143	normalization of mathematical images. </p>
				4144
				4145	<p>This operator is under review for re-development. </p>
				4146
				4147
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4148	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	4149	<h4><a id="linewidth"></a>-linewidth</h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4150	</div>
				4151
				4152	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>the line width for subsequent draw operations.</td><td style='text-align:right;'></td></tr></table>
				4153
				4154	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	4155	<h4><a id="liquid-rescale"></a>-liquid-rescale <em class="arg">geometry</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4156	</div>
				4157
				4158	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>rescale image with seam-carving.</td><td style='text-align:right;'></td></tr></table>
				4159
				4160	<p>See <a href="../www/command-line-processing.html#geometry">Image Geometry</a> for complete details about the <em class="arg">geometry</em> argument.</p>
				4161
				4162	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	4163	<h4><a id="list"></a>-list <em class="arg">type</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4164	</div>
				4165
				4166	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Print a list of supported arguments for various options or settings. Choose from these list types:</td><td style='text-align:right;'></td></tr></table>
				4167
				4168	<pre class="text">
cristy	e9a32c3	2011-04-07 01:11:05 +0000	[diff] [blame]	4169	Align Alpha Boolean Channel
				4170	Class ClipPath Coder Color
				4171	Colorspace Command Compose Compress
				4172	Configure DataType Debug Decoration
				4173	Delegate Direction Dispose Distort
				4174	Dither Endian Evaluate FillRule
				4175	Filter Font Format Function
				4176	Gravity ImageList Intent Interlace
				4177	Interpolate Kernel Layers LineCap
				4178	LineJoin List Locale LogEvent
				4179	Log Magic Method Metric
				4180	Mime Mode Morphology Module
				4181	Noise Orientation Policy PolicyDomain
				4182	PolicyRights Preview Primitive QuantumFormat
				4183	Resource SparseColor Storage Stretch
				4184	Style Threshold Type Units
				4185	Validate VirtualPixel
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4186	</pre>
				4187
cristy	bac7a16	2010-06-15 19:57:29 +0000	[diff] [blame]	4188	<p>These lists vary depending on your version of ImageMagick. Use "<kbd>-list
				4189	list</kbd>" to get a complete listing of all the "<kbd>-list</kbd>" arguments
				4190	available:</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4191
				4192	<p class='crt'><span class="crtprompt"> $magick> </span><span class='crtin'>identify -list list</span></p>
				4193	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	4194	<h4><a id="log"></a>-log <em class="arg">string</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4195	</div>
				4196
				4197	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Specify format for debug log.</td><td style='text-align:right;'></td></tr></table>
				4198
cristy	bac7a16	2010-06-15 19:57:29 +0000	[diff] [blame]	4199	<p>This option specifies the format for the log printed when the <a
				4200	href="#debug">-debug</a> option is active.</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4201
cristy	bac7a16	2010-06-15 19:57:29 +0000	[diff] [blame]	4202	<p>You can display the following components by embedding special format
				4203	characters:</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4204
				4205	<pre class="text">
cristy	e9a32c3	2011-04-07 01:11:05 +0000	[diff] [blame]	4206	%d domain
				4207	%e event
				4208	%f function
				4209	%l line
				4210	%m module
				4211	%p process ID
				4212	%r real CPU time
				4213	%t wall clock time
				4214	%u user CPU time
				4215	%% percent sign
				4216	\n newline
				4217	\r carriage return
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4218	</pre>
				4219
				4220	<p>For example:</p>
				4221
				4222	<p class='crt'><span class="crtprompt"> $magick> </span><span class='crtin'>convert -debug coders -log "%u %m:%l %e" in.gif out.png</span></p>
				4223	<p>The default behavior is to print all of the components.</p>
				4224
				4225	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	4226	<h4><a id="loop"></a>-loop <em class="arg">iterations</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4227	</div>
				4228
				4229	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>add Netscape loop extension to your GIF animation.</td><td style='text-align:right;'></td></tr></table>
				4230
cristy	bac7a16	2010-06-15 19:57:29 +0000	[diff] [blame]	4231	<p>Set iterations to zero to repeat the animation an infinite number of times,
				4232	otherwise the animation repeats itself up to <em class="arg">iterations</em>
				4233	times.</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4234
				4235	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	4236	<h4><a id="lowlight-color"></a>-lowlight-color <em class="arg">color</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4237	</div>
				4238
				4239	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>when comparing images, de-emphasize pixel differences with this color.</td><td style='text-align:right;'></td></tr></table>
				4240
				4241	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	4242	<h4><a id="magnify"></a>-magnify <em class="arg">factor</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4243	</div>
				4244
				4245	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>magnify the image.</td><td style='text-align:right;'></td></tr></table>
				4246
				4247
				4248	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	4249	<h4><a id="map"></a>-map <em class="arg">type</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4250	</div>
				4251
				4252	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Display image using this <em class="arg">type</em>.</td><td style='text-align:right;'>[<a href="../www/animate.html">animate</a>, <a href="../www/display.html">display</a>]</td></tr></table>
				4253
				4254	<p>Choose from these <em class="arg">Standard Colormap</em> types:</p>
				4255
				4256	<pre class="text">
cristy	e9a32c3	2011-04-07 01:11:05 +0000	[diff] [blame]	4257	best
				4258	default
				4259	gray
				4260	red
				4261	green
				4262	blue
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4263	</pre>
				4264
cristy	bac7a16	2010-06-15 19:57:29 +0000	[diff] [blame]	4265	<p>The <em class="arg">X server</em> must support the <em class="arg">Standard
				4266	Colormap</em> you choose, otherwise an error occurs. Use <kbd>list</kbd> as
				4267	the type and <kbd>display</kbd> searches the list of colormap types in
				4268	<kbd>top-to-bottom</kbd> order until one is located. See <em
				4269	class="arg">xstdcmap(1)</em> for one way of creating Standard Colormaps.</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4270
				4271
				4272	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	4273	<h4><a id="map_stream_"></a>-map <em class="arg">components</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4274	</div>
				4275
				4276	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>pixel map.</td><td style='text-align:right;'>[<a href="../www/stream.html">stream</a>]</td></tr></table>
				4277
				4278	<p>Here are the valid components of a map:</p>
				4279
				4280	<pre class="text">
cristy	e9a32c3	2011-04-07 01:11:05 +0000	[diff] [blame]	4281	r red pixel component
				4282	g green pixel component
				4283	b blue pixel component
				4284	a alpha pixel component (0 is transparent)
				4285	o opacity pixel component (0 is opaque)
				4286	i grayscale intensity pixel component
				4287	c cyan pixel component
				4288	m magenta pixel component
				4289	y yellow pixel component
				4290	k black pixel component
				4291	p pad component (always 0)
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4292	</pre>
				4293
cristy	bac7a16	2010-06-15 19:57:29 +0000	[diff] [blame]	4294	<p>You can specify as many of these components as needed in any order (e.g.
				4295	bgr). The components can repeat as well (e.g. rgbr).</p>
				4296
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4297
				4298	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	4299	<h4><a id="mask"></a>-mask
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4300	<em class="arg">filename</em></h4>
				4301	</div>
				4302
cristy	acc0488	2011-05-04 23:03:43 +0000	[diff] [blame]	4303	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Prevent updates to image pixels specified by the mask.</td><td style='text-align:right;'></td></tr></table>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4304
cristy	acc0488	2011-05-04 23:03:43 +0000	[diff] [blame]	4305	<p>This the same as using a mask used for composite masking operations, with
				4306	grayscale values causing blended updates of the image the mask is attached to.
				4307	</P>
				4308
				4309	<p>Use <a href="#mask">+mask</a> to remove the mask from images.</p>
				4310
				4311	<p>Also see <a href="#clip-mask">-clip-mask</a> which work in the same way,
				4312	but with strict boolean masking. </p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4313
				4314	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	4315	<h4><a id="mattecolor"></a>-mattecolor <em class="arg">color</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4316	</div>
				4317
				4318	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Specify the color to be used with the <a href="#frame">-frame</a> option.</td><td style='text-align:right;'></td></tr></table>
				4319
				4320	<p>The color is specified using the format described under the <a href="#fill">-fill</a> option.</p>
				4321
cristy	bac7a16	2010-06-15 19:57:29 +0000	[diff] [blame]	4322	<p>The default matte color is <kbd>#BDBDBD</kbd>, <span
				4323	style="background-color: #bdbdbd;">this shade of gray</span>.</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4324
				4325	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	4326	<h4><a id="maximum"></a>-maximum</h4>
cristy	d2baf7d	2010-03-06 04:26:44 +0000	[diff] [blame]	4327	</div>
				4328
				4329	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>return the maximum intensity of an image sequence.</td><td style='text-align:right;'></td></tr></table>
				4330
cristy	acc0488	2011-05-04 23:03:43 +0000	[diff] [blame]	4331	<p>Select the 'maximum' value from all the surrounding pixels. </p>
				4332
				4333	<p>This is legacy option from the <a href="#statistic" >method</A> of the same
				4334	name. </p>
				4335
cristy	d2baf7d	2010-03-06 04:26:44 +0000	[diff] [blame]	4336	<div style="margin: auto;">
cristy	e9a32c3	2011-04-07 01:11:05 +0000	[diff] [blame]	4337	<h4><a id="median"></a>-median <em class="arg">geometry</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4338	</div>
				4339
				4340	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>apply a median filter to the image.</td><td style='text-align:right;'></td></tr></table>
				4341
cristy	acc0488	2011-05-04 23:03:43 +0000	[diff] [blame]	4342	<p>Select the 'middle' value from all the surrounding pixels. </p>
				4343
				4344	<p>This is legacy option from the <a href="#statistic" >method</A> of the same
				4345	name. </p>
				4346
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4347	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	4348	<h4><a id="metric"></a>-metric <em class="arg">type</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4349	</div>
				4350
				4351	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Output to STDERR a measure of the differences between images according to the <em class="arg">type</em> given metric.</td><td style='text-align:right;'></td></tr></table>
				4352
				4353	<p>Choose from:</p>
				4354
				4355	<pre class="text">
cristy	e9a32c3	2011-04-07 01:11:05 +0000	[diff] [blame]	4356	AE absolute error count, number of different pixels (-fuzz effected)
				4357	FUZZ mean color distance
				4358	MAE mean absolute error (normalized), average channel error distance
				4359	MEPP mean error per pixel (normalized mean error, normalized peak error)
				4360	MSE mean error squared, average of the channel error squared
				4361	NCC normalized cross correlation
				4362	PAE peak absolute (normalize peak absolute)
				4363	PSNR peak signal to noise ratio
				4364	RMSE root mean squared (normalized root mean squared)
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4365	</pre>
				4366
cristy	771f7a7	2010-11-27 21:42:59 +0000	[diff] [blame]	4367	<p>Control the '<kbd>AE</kbd>', or absolute count of pixels that are different,
				4368	with the <a href="#fuzz" >-fuzz</a> factor (ignore pixels which
				4369	only changed by a small amount). Use '<kbd>PAE</kbd>' to find the
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4370	size of the <a href="#fuzz" >-fuzz</a> factor needed to make all pixels
cristy	771f7a7	2010-11-27 21:42:59 +0000	[diff] [blame]	4371	'similar', while '<kbd>MAE</kbd>' dtermines the factor needed
cristy	bac7a16	2010-06-15 19:57:29 +0000	[diff] [blame]	4372	for about half the pixels to be similar. </p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4373
				4374	<p>The '<kbd>MEPP</kbd>' metric returns three different metrics
				4375	('<kbd>MAE</kbd>', '<kbd>MAE</kbd>' normalized, and '<kbd>PAE</kbd>'
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	4376	normalized) from a single comparison run. </p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4377
cristy	bac7a16	2010-06-15 19:57:29 +0000	[diff] [blame]	4378	<p>To print a complete list of metrics, use the <a href="#list">-list
				4379	metrics</a> option.</p>
				4380
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4381
cristy	d2baf7d	2010-03-06 04:26:44 +0000	[diff] [blame]	4382	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	4383	<h4><a id="minimum"></a>-minimum</h4>
cristy	d2baf7d	2010-03-06 04:26:44 +0000	[diff] [blame]	4384	</div>
				4385
				4386	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>return the minimum intensity of an image sequence.</td><td style='text-align:right;'></td></tr></table>
				4387
cristy	acc0488	2011-05-04 23:03:43 +0000	[diff] [blame]	4388	<p>Select the 'minimal' value from all the surrounding pixels. </p>
				4389
				4390	<p>This is legacy option from the <a href="#statistic" >method</A> of the same
				4391	name. </p>
				4392
				4393
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4394
				4395	<div style="margin: auto;">
cristy	e9a32c3	2011-04-07 01:11:05 +0000	[diff] [blame]	4396	<h4><a id="mode"></a>-mode <em class="arg">geometry</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4397	</div>
				4398
cristy	29c5c99	2011-06-25 13:58:49 +0000	[diff] [blame]	4399	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>make each pixel the 'predominant color' of the neighborhood.</td><td style='text-align:right;'>[<a href="../www/convert.html">convert</a>, <a href="../www/mogrify.html">mogrify</a>]</td></tr></table>
cristy	be3c5be	2011-03-05 17:35:07 +0000	[diff] [blame]	4400
				4401	<div style="margin: auto;">
				4402	<h4>-mode <em class="arg">value</em></h4>
				4403	</div>
				4404
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4405	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Mode of operation.</td><td style='text-align:right;'>[<a href="../www/montage.html">montage</a>]</td></tr></table>
				4406
cristy	bac7a16	2010-06-15 19:57:29 +0000	[diff] [blame]	4407	<p>Choose the <em class="arg">value</em> from these styles: <kbd>Frame,
				4408	Unframe, or Concatenate</kbd></p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4409
cristy	bac7a16	2010-06-15 19:57:29 +0000	[diff] [blame]	4410	<p>Use the <a href="#list" >-list</a> option with a '<kbd>Mode</kbd>' argument
				4411	for a list of <a href="#mode" >-mode</a> arguments available in your
				4412	ImageMagick installation.</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4413
				4414
				4415	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	4416	<h4><a id="modulate"></a>-modulate <em class="arg">brightness</em>[,<em class="arg">saturation</em>,<em class="arg">hue</em>]</h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4417	</div>
				4418
cristy	bac7a16	2010-06-15 19:57:29 +0000	[diff] [blame]	4419	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Vary the <em class="arg">brightness</em>, <em
				4420	class="arg">saturation</em>, and <em class="arg">hue</em> of an image.</td><td style='text-align:right;'></td></tr></table>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4421
cristy	b36feb2	2010-03-26 16:54:37 +0000	[diff] [blame]	4422	<p>The arguments are given as a percentages of variation. A value of 100 means
				4423	no change, and any missing values are taken to mean 100.</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4424
cristy	b36feb2	2010-03-26 16:54:37 +0000	[diff] [blame]	4425	<p>The <em class="arg">brightness</em> is a multiplier of the overall
				4426	brightness of the image, so 0 means pure black, 50 is half as bright, 200 is
				4427	twice as bright. To invert its meaning <a href="#negate">-negate</a> the image
				4428	before and after. </p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4429
cristy	b36feb2	2010-03-26 16:54:37 +0000	[diff] [blame]	4430	<p>The <em class="arg">saturation</em> controls the amount of color in an
				4431	image. For example, 0 produce a grayscale image, while a large value such as
				4432	200 produce a very colorful, 'cartoonish' color.</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4433
cristy	b36feb2	2010-03-26 16:54:37 +0000	[diff] [blame]	4434	<p>The <em class="arg">hue</em> argument causes a "rotation" of the colors
				4435	within the image by the amount specified. For example, 50 results in
				4436	a counter-clockwise rotation of 90, mapping red shades to purple, and so on.
				4437	A value of either 0 or 200 results in a complete 180 degree rotation of the
				4438	image. Using a value of 300 is a 360 degree rotation resulting in no change to
				4439	the original image. </p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4440
cristy	b36feb2	2010-03-26 16:54:37 +0000	[diff] [blame]	4441	<p>For example, to increase the color brightness by 20% and decrease the color
				4442	saturation by 10% and leave the hue unchanged, use <a
				4443	href="#modulate">-modulate 120,90</a>.</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4444
cristy	b36feb2	2010-03-26 16:54:37 +0000	[diff] [blame]	4445	<p>Use <a href="#set">-set</a> attribute of '<kbd
				4446	class="arg">option:modulate:colorspace</kbd>' to specify which colorspace to
				4447	modulate. Choose from <kbd>HSB</kbd>, <kbd>HSL</kbd> (the default), or
				4448	<kbd>HWB</kbd>. For example,</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4449
				4450	<p class='crt'><span class="crtprompt"> $magick> </span><span class='crtin'>convert image.png -set option:modulate:colorspace hsb -modulate 120,90 modulate.png</span></p>
cristy	b36feb2	2010-03-26 16:54:37 +0000	[diff] [blame]	4451
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4452	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	4453	<h4><a id="monitor"></a>-monitor</h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4454	</div>
				4455
				4456	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>monitor progress.</td><td style='text-align:right;'></td></tr></table>
				4457
				4458
				4459	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	4460	<h4><a id="monochrome"></a>-monochrome</h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4461	</div>
				4462
				4463	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>transform the image to black and white.</td><td style='text-align:right;'></td></tr></table>
				4464
				4465
				4466	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	4467	<h4><a id="morph"></a>-morph <em class="arg">frames</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4468	</div>
				4469
				4470	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>morphs an image sequence.</td><td style='text-align:right;'></td></tr></table>
				4471
				4472	<p>Both the image pixels and size are linearly interpolated to give the
				4473	appearance of a meta-morphosis from one image to the next, over all the images
				4474	in the current image list. The added images are the equivalent of a <a
				4475	href="#blend">-blend</a> composition. The <em class="arg">frames</em>
				4476	argument determine how many images to interpolate between each image. </p>
				4477
				4478
				4479	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	4480	<h4><a id="morphology"></a>-morphology</h4>
				4481	<h4>-morphology <em class="arg">method</em> <em class="arg">kernel</em></h4>
cristy	488844c	2010-01-22 14:02:05 +0000	[diff] [blame]	4482	</div>
				4483
cristy	2c83960	2010-04-03 02:32:08 +0000	[diff] [blame]	4484	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>apply a morphology method to the image.</td><td style='text-align:right;'></td></tr></table>
cristy	488844c	2010-01-22 14:02:05 +0000	[diff] [blame]	4485
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	4486	<p>Until I get around to writing a option summary for this, see <a
				4487	href="http://www.imagemagick.org/Usage/morphology/" >IM Usage Examples,
				4488	Morphology</a>. </p>
cristy	83a272e	2010-05-07 20:40:35 +0000	[diff] [blame]	4489
				4490
cristy	488844c	2010-01-22 14:02:05 +0000	[diff] [blame]	4491	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	4492	<h4><a id="mosaic"></a>-mosaic</h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4493	</div>
				4494
				4495	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>an simple alias for the <a href="#layers" >-layers</a> method "mosaic"</td><td style='text-align:right;'></td></tr></table>
				4496
				4497
				4498	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	4499	<h4><a id="motion-blur"></a>-motion-blur <em class="arg">radius</em><br />-motion-blur <em class="arg">radius</em>x<em class="arg">sigma</em>+<em class="arg">angle</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4500	</div>
				4501
				4502	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>simulate motion blur.</td><td style='text-align:right;'></td></tr></table>
				4503
				4504	<p>Blur with the given radius, standard deviation (sigma), and angle. The
				4505	angle given is the angle toward which the image is blurred. That is the
				4506	direction people would consider the object is coming from. </p>
				4507
				4508	<p>Note that the blur is not uniform distribution, giving the motion a
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	4509	definite sense of direction of movement. </p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4510
				4511	<p>The <a href="#virtual-pixel">-virtual-pixel</a> setting will determine how
				4512	pixels which are outside the image proper are blurred into the final result.
				4513	</p>
				4514
				4515	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	4516	<h4><a id="name"></a>-name</h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4517	</div>
				4518
				4519	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>name an image.</td><td style='text-align:right;'></td></tr></table>
				4520	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	4521	<h4><a id="negate"></a>-negate</h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4522	</div>
				4523
cristy	b29bc03	2010-02-01 20:29:43 +0000	[diff] [blame]	4524	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>replace each pixel with its complementary color.</td><td style='text-align:right;'></td></tr></table>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4525
				4526	<p>The red, green, and blue intensities of an image are negated. White becomes black, yellow becomes blue, etc. Use <a href="#negate">+negate</a> to only negate the grayscale pixels of the image.</p>
				4527
				4528	<div style="margin: auto;">
cristy	e9a32c3	2011-04-07 01:11:05 +0000	[diff] [blame]	4529	<h4><a id="noise"></a>-noise <em class="arg">geometry</em><br/>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4530	+noise <em class="arg">type</em></h4>
				4531	</div>
				4532
				4533	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Add or reduce noise in an image.</td><td style='text-align:right;'></td></tr></table>
				4534
				4535	<p>The principal function of noise peak elimination filter is to smooth the objects within an image without losing edge information and without creating undesired structures. The central idea of the algorithm is to replace a pixel with its next neighbor in value within a pixel window, if this pixel has been found to be noise. A pixel is defined as noise if and only if this pixel is a maximum or minimum within the pixel window.</p>
				4536
				4537	<p>Use <kbd><a href="#noise">-noise</a> <em class="arg">radius</em></kbd> to specify the width of the neighborhood when reducing noise.</p>
				4538
				4539	<p>Use <a href="#noise">+noise</a> followed by a noise <em class="arg">type</em> to add noise to an image. Choose from these noise types:</p>
				4540
				4541	<pre class="text">
cristy	e9a32c3	2011-04-07 01:11:05 +0000	[diff] [blame]	4542	Gaussian
				4543	Impulse
				4544	Laplacian
				4545	Multiplicative
				4546	Poisson
				4547	Random
				4548	Uniform
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4549	</pre>
				4550
				4551	<p>To print a complete list of noises, use the <a href="#list">-list noise</a> option.</p>
				4552
cristy	8354396	2009-10-16 19:04:28 +0000	[diff] [blame]	4553	<p>Also see the <a href="#evaluate">-evaluate</a> noise functions that allos
				4554	the use of a controlling value to specify teh amount of noise that should be
				4555	added to an image. </p>
				4556
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4557
				4558	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	4559	<h4><a id="normalize"></a>-normalize</h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4560	</div>
				4561
				4562	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Increase the contrast in an image by <em>stretching</em> the range of intensity values.</td><td style='text-align:right;'></td></tr></table>
				4563
cristy	d934d10	2009-10-10 12:55:13 +0000	[diff] [blame]	4564	<p>The intensity values are stretched to cover the entire range of possible
				4565	values. While doing so, black-out at most <em>2%</em> of the pixels and
				4566	white-out at most <em>1%</em> of the pixels.</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4567
cristy	d934d10	2009-10-10 12:55:13 +0000	[diff] [blame]	4568	<p>Note that as of ImageMagick 6.4.7-0, <a href="#normalize" >-normalize</a>
				4569	is equivalent to <a href="#contrast-stretch" >-contrast-stretch 2%x1%</a>.
				4570	(Before this version, it was equivalent to <a href="#contrast-stretch"
				4571	>-contrast-stretch 2%x99%</a>).</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4572
cristy	d934d10	2009-10-10 12:55:13 +0000	[diff] [blame]	4573	<p>All the channels are normalized in concert by the came amount so as to
				4574	preserve color integrity, when the default <a href="#channel" >+channel</a>
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	4575	setting is in use. Specifying any other <a href="#channel" >-channel</a>
cristy	d934d10	2009-10-10 12:55:13 +0000	[diff] [blame]	4576	setting will normalize the RGB channels independently.</p>
				4577
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	4578	<p>See <a href="#contrast-stretch" >-contrast-stretch</a> for more details.
cristy	d934d10	2009-10-10 12:55:13 +0000	[diff] [blame]	4579	Also see <a href="#auto-level" >-auto-level</a> for a 'perfect' normalization
cristy	8354396	2009-10-16 19:04:28 +0000	[diff] [blame]	4580	that is better suited to mathematically generated images. </p>
cristy	d934d10	2009-10-10 12:55:13 +0000	[diff] [blame]	4581
				4582	<p>This operator is under review for re-development. </p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4583
				4584
				4585	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	4586	<h4><a id="ordered-dither"></a>-ordered-dither <em class="arg">threshold_map</em>{,<em class="arg">level</em>...}</h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4587	</div>
				4588
cristy	d934d10	2009-10-10 12:55:13 +0000	[diff] [blame]	4589	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>dither the image using a pre-defined ordered dither <em
				4590	class="arg">threshold map</em> specified, and a uniform color map with the
				4591	given number of <em class="arg">levels</em> per color channel . </td><td style='text-align:right;'></td></tr></table>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4592
				4593	<p>You can choose from these standard threshold maps:</p>
				4594
				4595	<pre class="text">
cristy	e9a32c3	2011-04-07 01:11:05 +0000	[diff] [blame]	4596	threshold 1x1 Threshold 1x1 (non-dither)
				4597	checks 2x1 Checkerboard 2x1 (dither)
				4598	o2x2 2x2 Ordered 2x2 (dispersed)
				4599	o3x3 3x3 Ordered 3x3 (dispersed)
				4600	o4x4 4x4 Ordered 4x4 (dispersed)
				4601	o8x8 8x8 Ordered 8x8 (dispersed)
				4602	h4x4a 4x1 Halftone 4x4 (angled)
				4603	h6x6a 6x1 Halftone 6x6 (angled)
				4604	h8x8a 8x1 Halftone 8x8 (angled)
				4605	h4x4o Halftone 4x4 (orthogonal)
				4606	h6x6o Halftone 6x6 (orthogonal)
				4607	h8x8o Halftone 8x8 (orthogonal)
				4608	h16x16o Halftone 16x16 (orthogonal)
				4609	c5x5b c5x5 Circles 5x5 (black)
				4610	c5x5w Circles 5x5 (white)
				4611	c6x6b c6x6 Circles 6x6 (black)
				4612	c6x6w Circles 6x6 (white)
				4613	c7x7b c7x7 Circles 7x7 (black)
				4614	c7x7w Circles 7x7 (white)
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4615	</pre>
				4616
cristy	945bb35	2011-04-01 15:39:28 +0000	[diff] [blame]	4617	<p> The <kbd>threshold</kbd> generated a simple 50% threshold of the image.
cristy	baacd17	2011-04-30 23:11:03 +0000	[diff] [blame]	4618	This could be used with <em class="arg" >level</em> to do the equivalent of <a
cristy	945bb35	2011-04-01 15:39:28 +0000	[diff] [blame]	4619	href="#posterize" >-posterize</a> to reduce an image to basic primary colors.
				4620	</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4621
cristy	945bb35	2011-04-01 15:39:28 +0000	[diff] [blame]	4622	<p>The <kbd>checks</kbd> pattern produces a 3 level checkerbord dither
				4623	pattern. That is a grayscale will become a pattern of solid black, solid
				4624	white, and mid-tone colors into a checkerboard pattern of black and white.
				4625	</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4626
cristy	945bb35	2011-04-01 15:39:28 +0000	[diff] [blame]	4627	<p>You can define your own <em class="arg" >threshold map</em> for ordered
				4628	dithering and halftoning your images, in either personal or system
				4629	<kbd>thresholds.xml</kbd> XML file. See <a href="resources.html" >Resources</A>
				4630	for more details of configuration files. </p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4631
cristy	945bb35	2011-04-01 15:39:28 +0000	[diff] [blame]	4632	<p>To print a complete list of the thresholds that have been defined, use the
				4633	<a href="#list" >-list threshold</a> option.</p>
				4634
				4635	<p>Note that at this time the same threshold dithering map is used for all
				4636	color channels, no attempt is made to offset or rotate the map for different
				4637	channels is made, to create an offset printing effect. Also as the maps are
				4638	simple threshold levels, the halftone and circle maps will create incomplete
				4639	circles along the edges of a colored area. Also all the effects are purely
				4640	on/off boolean effects, without anti-aliasing to make the circles smooth
				4641	looking. Large dots can be made to look better with a small amount of blurring
				4642	after being created. </p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4643
				4644
				4645	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	4646	<h4><a id="opaque"></a>-opaque <em class="arg">color</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4647	</div>
				4648
				4649	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>change this color to the fill color within the image.</td><td style='text-align:right;'></td></tr></table>
				4650
cristy	c54f5d4	2009-11-27 21:36:31 +0000	[diff] [blame]	4651	<p>The <em class="arg">color</em> argument is defined using the format
cristy	d934d10	2009-10-10 12:55:13 +0000	[diff] [blame]	4652	described under the <a href="#fill" >-fill</a> option. The <a href="#fuzz"
				4653	>-fuzz</a> setting can be used to match and replace colors similar to the one
				4654	given.</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4655
cristy	b36feb2	2010-03-26 16:54:37 +0000	[diff] [blame]	4656	<p>Use <a href="#opaque">+opaque</a> to paint any pixel that does not match
				4657	the target color. </p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4658
cristy	b36feb2	2010-03-26 16:54:37 +0000	[diff] [blame]	4659	<p>The <a href="#transparent">-transparent</a> operator is exactly the same
				4660	as <a href="#opaque" >-opaque</a> but replaces the matching color with
				4661	transparency rather than the current <a href="#fill">-fill</a> color setting.
				4662	To ensure that it can do this it also ensures that the image has an alpha
				4663	channel enabled, as per "<kbd><a href="#alpha" >-alpha</a> set</kbd>", for
				4664	the new transparent colors, and does not require you to modify the <a
				4665	href="#channel">-channel</a> to enable alpha channel handling. </p>
cristy	d934d10	2009-10-10 12:55:13 +0000	[diff] [blame]	4666
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4667
				4668	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	4669	<h4><a id="orient"></a>-orient <em class="arg">image orientation</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4670	</div>
				4671
				4672	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>specify orientation of a digital camera image.</td><td style='text-align:right;'></td></tr></table>
				4673
				4674	<p>Choose from these orientations:</p>
				4675
				4676	<pre class="text">
cristy	e9a32c3	2011-04-07 01:11:05 +0000	[diff] [blame]	4677	bottom-left
				4678	bottom-right
				4679	left-bottom
				4680	left-top
				4681	right-bottom
				4682	right-top
				4683	top-left
				4684	top-right
				4685	undefined
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4686	</pre>
				4687
cristy	d934d10	2009-10-10 12:55:13 +0000	[diff] [blame]	4688	<p>To print a complete list of orientations, use the <a href="#list" >-list
				4689	orientation</a> option.</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4690
				4691
				4692	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	4693	<h4><a id="page"></a>-page <em class="arg">geometry</em><br/>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4694	-page <em class="arg">media</em>[<em class="arg">offset</em>][{<em class="arg">^!<></em>}]<br/>
				4695	+page
				4696	</h4>
				4697	</div>
				4698
				4699	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Set the size and location of an image on the larger virtual canvas.</td><td style='text-align:right;'></td></tr></table>
				4700
				4701	<p>See <a href="../www/command-line-processing.html#geometry">Image Geometry</a> for complete details about the <em class="arg">geometry</em> argument.</p>
				4702
				4703	<p>For convenience you can specify the page size using <em class="arg">media</em> (see below). Offsets can then be added as with other <em class="arg">geometry</em> arguments (e.g. <a href="#page">-page</a> <kbd>Letter+43+43</kbd>).</p>
				4704
				4705	<p>Use <em class="arg">media</em> as shorthand to specify the dimensions (<em class="arg">width</em>x<em class="arg">height</em>) of the <em class="arg">PostScript</em> page in dots per inch or a TEXT page in pixels. The choices for a PostScript page are:</p>
				4706	<table id="geometryTable" cellpadding="2" cellspacing="0" border="1" width="50%" style="margin-left: auto; margin-right: auto;">
				4707	<thead>
				4708	<tr valign="top">
				4709	<th align="center"><em class="arg">media</em></th>
				4710	<th align="center"><em class="arg">width</em></th>
				4711	<th align="center"><em class="arg">height</em></th>
				4712	</tr>
				4713	</thead>
				4714	<tbody>
				4715	<tr><td align="left"> 11x17 </td> <td align="right"> 792</td> <td align="right"> 1224</td> </tr>
				4716	<tr><td align="left"> Ledger </td> <td align="right"> 1224</td> <td align="right"> 792</td> </tr>
				4717	<tr><td align="left"> Legal </td> <td align="right"> 612</td> <td align="right"> 1008</td> </tr>
				4718	<tr><td align="left"> Letter </td> <td align="right"> 612</td> <td align="right"> 792</td> </tr>
				4719	<tr><td align="left"> LetterSmall</td> <td align="right"> 612</td> <td align="right"> 792</td> </tr>
				4720	<tr><td align="left"> ArchE </td> <td align="right"> 2592</td> <td align="right"> 3456</td> </tr>
				4721	<tr><td align="left"> ArchD </td> <td align="right"> 1728</td> <td align="right"> 2592</td> </tr>
				4722	<tr><td align="left"> ArchC </td> <td align="right"> 1296</td> <td align="right"> 1728</td> </tr>
				4723	<tr><td align="left"> ArchB </td> <td align="right"> 864</td> <td align="right"> 1296</td> </tr>
				4724	<tr><td align="left"> ArchA </td> <td align="right"> 648</td> <td align="right"> 864</td> </tr>
				4725	<tr><td align="left"> A0 </td> <td align="right"> 2380</td> <td align="right"> 3368</td> </tr>
				4726	<tr><td align="left"> A1 </td> <td align="right"> 1684</td> <td align="right"> 2380</td> </tr>
				4727	<tr><td align="left"> A2 </td> <td align="right"> 1190</td> <td align="right"> 1684</td> </tr>
				4728	<tr><td align="left"> A3 </td> <td align="right"> 842</td> <td align="right"> 1190</td> </tr>
				4729	<tr><td align="left"> A4 </td> <td align="right"> 595</td> <td align="right"> 842</td> </tr>
				4730	<tr><td align="left"> A4Small </td> <td align="right"> 595</td> <td align="right"> 842</td> </tr>
				4731	<tr><td align="left"> A5 </td> <td align="right"> 421</td> <td align="right"> 595</td> </tr>
				4732	<tr><td align="left"> A6 </td> <td align="right"> 297</td> <td align="right"> 421</td> </tr>
				4733	<tr><td align="left"> A7 </td> <td align="right"> 210</td> <td align="right"> 297</td> </tr>
				4734	<tr><td align="left"> A8 </td> <td align="right"> 148</td> <td align="right"> 210</td> </tr>
				4735	<tr><td align="left"> A9 </td> <td align="right"> 105</td> <td align="right"> 148</td> </tr>
				4736	<tr><td align="left"> A10 </td> <td align="right"> 74</td> <td align="right"> 105</td> </tr>
				4737	<tr><td align="left"> B0 </td> <td align="right"> 2836</td> <td align="right"> 4008</td> </tr>
				4738	<tr><td align="left"> B1 </td> <td align="right"> 2004</td> <td align="right"> 2836</td> </tr>
				4739	<tr><td align="left"> B2 </td> <td align="right"> 1418</td> <td align="right"> 2004</td> </tr>
				4740	<tr><td align="left"> B3 </td> <td align="right"> 1002</td> <td align="right"> 1418</td> </tr>
				4741	<tr><td align="left"> B4 </td> <td align="right"> 709</td> <td align="right"> 1002</td> </tr>
				4742	<tr><td align="left"> B5 </td> <td align="right"> 501</td> <td align="right"> 709</td> </tr>
				4743	<tr><td align="left"> C0 </td> <td align="right"> 2600</td> <td align="right"> 3677</td> </tr>
				4744	<tr><td align="left"> C1 </td> <td align="right"> 1837</td> <td align="right"> 2600</td> </tr>
				4745	<tr><td align="left"> C2 </td> <td align="right"> 1298</td> <td align="right"> 1837</td> </tr>
				4746	<tr><td align="left"> C3 </td> <td align="right"> 918</td> <td align="right"> 1298</td> </tr>
				4747	<tr><td align="left"> C4 </td> <td align="right"> 649</td> <td align="right"> 918</td> </tr>
				4748	<tr><td align="left"> C5 </td> <td align="right"> 459</td> <td align="right"> 649</td> </tr>
				4749	<tr><td align="left"> C6 </td> <td align="right"> 323</td> <td align="right"> 459</td> </tr>
				4750	<tr><td align="left"> Flsa </td> <td align="right"> 612</td> <td align="right"> 936</td> </tr>
				4751	<tr><td align="left"> Flse </td> <td align="right"> 612</td> <td align="right"> 936</td> </tr>
				4752	<tr><td align="left"> HalfLetter </td> <td align="right"> 396</td> <td align="right"> 612</td> </tr>
				4753	</tbody>
				4754	</table>
				4755
				4756
				4757
				4758
				4759	<p>This option is also used to place subimages when writing to a multi-image format that supports offsets, such as GIF89 and MNG. When used for this purpose the offsets are always measured from the top left corner of the canvas and are not affected by the <a href="#gravity">-gravity</a> option. To position a GIF or MNG image, use <a href="#page">-page</a><em class="arg">{+-}x{+-}y</em> (e.g. -page +100+200). When writing to a MNG file, a <a href="#page">-page</a> option appearing ahead of the first image in the sequence with nonzero width and height defines the width and height values that are written in the <kbd>MHDR</kbd> chunk. Otherwise, the MNG width and height are computed from the bounding box that contains all images in the sequence. When writing a GIF89 file, only the bounding box method is used to determine its dimensions.</p>
				4760
				4761	<p>For a PostScript page, the image is sized as in <a href="#geometry">-geometry</a> but positioned relative to the <em>lower left-hand corner</em> of the page by {+-}<kbd>x</kbd><em class="arg">offset</em>{+-}<kbd>y</kbd> <em class="arg">offset</em>. Use <a href="#page">-page 612x792</a>, for example, to center the image within the page. If the image size exceeds the PostScript page, it is reduced to fit the page. The default gravity for the <a href="#page">-page</a> option is <em class="arg">NorthWest</em>, i.e., positive <kbd>x</kbd> and <kbd>y</kbd> <em class="arg">offset</em> are measured rightward and downward from the top left corner of the page, unless the <a href="#gravity">-gravity</a> option is present with a value other than <em class="arg">NorthWest</em>.</p>
				4762
				4763	<p>The default page dimensions for a TEXT image is 612x792.</p>
				4764
				4765	<p>This option is used in concert with <a href="#density">-density</a>.</p>
				4766
				4767	<p>Use <a href="#page">+page</a> to remove the page settings for an image.</p>
				4768
				4769	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	4770	<h4><a id="paint"></a>-paint <em class="arg">radius</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4771	</div>
				4772
				4773	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>simulate an oil painting.</td><td style='text-align:right;'></td></tr></table>
				4774
				4775	<p>Each pixel is replaced by the most frequent color in a circular neighborhood whose width is specified with <em class="arg">radius</em>.</p>
				4776
				4777	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	4778	<h4><a id="path"></a>-path <em class="arg">path</em></h4></div>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4779
				4780	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>write images to this path on disk.</td><td style='text-align:right;'></td></tr></table>
				4781
				4782	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	4783	<h4><a id="pause_animate_"></a>-pause <em class="arg">seconds</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4784	</div>
				4785
				4786	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Pause between animation loops.</td><td style='text-align:right;'>[<a href="../www/animate.html">animate</a>]</td></tr></table>
				4787
				4788	<p>Pause for the specified number of seconds before repeating the animation.</p>
				4789
				4790	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	4791	<h4><a id="pause_import_"></a>-pause <em class="arg">seconds</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4792	</div>
				4793
				4794	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Pause between snapshots.</td><td style='text-align:right;'>[<a href="../www/import.html">import</a>]</td></tr></table>
				4795
				4796	<p>Pause for the specified number of seconds before taking the next snapshot.</p>
				4797
				4798	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	4799	<h4><a id="ping"></a>-ping</h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4800	</div>
				4801
				4802	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>efficiently determine image characteristics.</td><td style='text-align:right;'></td></tr></table>
				4803
				4804	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	4805	<h4><a id="pointsize"></a>-pointsize <em class="arg">value</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4806	</div>
				4807
				4808	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>pointsize of the PostScript, OPTION1, or TrueType font.</td><td style='text-align:right;'></td></tr></table>
				4809
				4810	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	4811	<h4><a id="polaroid"></a>-polaroid <em class="arg">angle</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4812	</div>
				4813
				4814	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>simulate a Polaroid picture.</td><td style='text-align:right;'></td></tr></table>
				4815
				4816	<p>Use <kbd>+polaroid</kbd> to rotate the image at a random angle between -15 and +15 degrees.</p>
				4817
				4818	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	4819	<h4><a id="posterize"></a>-posterize <em class="arg">levels</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4820	</div>
				4821
				4822	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>reduce the image to a limited number of color levels.</td><td style='text-align:right;'></td></tr></table>
				4823
				4824	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	4825	<h4><a id="precision"></a>-precision <em class="arg">value</em></h4>
cristy	d43a46b	2010-01-21 02:13:41 +0000	[diff] [blame]	4826	</div>
				4827
				4828	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>set the maximum number of significant digits to be printed.</td><td style='text-align:right;'></td></tr></table>
				4829
				4830	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	4831	<h4><a id="preview"></a>-preview <em class="arg">type</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4832	</div>
				4833
				4834	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>image preview type.</td><td style='text-align:right;'></td></tr></table>
				4835
				4836	<p>Use this option to affect the preview operation of an image (e.g. <kbd>convert file.png -preview Gamma Preview:gamma.png</kbd>). Choose from these previews:</p>
				4837
				4838	<pre class="text">
cristy	e9a32c3	2011-04-07 01:11:05 +0000	[diff] [blame]	4839	Rotate Shear Roll Hue
				4840	Saturation Brightness Gamma Spiff
				4841	Dull Grayscale Quantize Despeckle
				4842	ReduceNoise Add Noise Sharpen Blur
				4843	Threshold EdgeDetect Spread Shade
				4844	Raise Segment Solarize Swirl
				4845	Implode Wave OilPaint CharcoalDrawing
				4846	JPEG
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4847	</pre>
				4848
				4849	<p>To print a complete list of previews, use the <a href="#list">-list preview</a> option.</p>
				4850
				4851	<p>The default preview is <kbd>JPEG</kbd>.</p>
				4852
				4853	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	4854	<h4><a id="print"></a>-print <em class="arg">string</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4855	</div>
				4856
				4857	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>interpret string and print to console.</td><td style='text-align:right;'></td></tr></table>
				4858
				4859	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	4860	<h4><a id="process"></a>-process <em class="arg">command</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4861	</div>
				4862
				4863	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>process the image with a custom image filter.</td><td style='text-align:right;'></td></tr></table>
				4864
				4865	<p>The command arguments has the form <kbd>"module arg1 arg2 arg3 ... argN"</kbd> where <kbd>module</kbd> is the name of the module to invoke (e.g. "Analyze") and arg1 arg2 arg3 ... argN are an arbitrary number of arguments to pass to the process module.</p>
				4866
				4867	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	4868	<h4><a id="profile"></a>-profile <em class="arg">filename</em><br/>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4869	+profile <em class="arg">profile_name</em></h4>
				4870	</div>
				4871
				4872	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Manage ICM, IPTC, or generic profiles in an image.</td><td style='text-align:right;'></td></tr></table>
				4873
				4874	<p>Using <a href="#profile">-profile</a> <em class="arg">filename</em> adds an ICM (ICC color management), IPTC (newswire information), or a generic profile to the image.</p>
				4875
				4876	<p>Use <a href="#profile">+profile <em class="arg">profile_name</em></a> to remove the indicated profile. ImageMagick uses standard filename globbing, so wildcard expressions may be used to remove more than one profile. Here we remove all profiles from the image except for the XMP profile: <kbd>+profile "!xmp,*"</kbd>. </p>
				4877
				4878	<p>Use <kbd>identify -verbose</kbd> to find out which profiles are in the image file. Use <a href="#strip">-strip</a> to remove all profiles (and comments).</p>
				4879
				4880	<p>To extract a profile, the <a href="#profile">-profile</a> option is not used. Instead, simply write the file to an image format such as <em class="arg">APP1, 8BImageMagick, ICM,</em> or <em class="arg">IPTC</em>.</p>
				4881
				4882	<p>For example, to extract the Exif data (which is stored in JPEG files in the <em class="arg">APP1</em> profile), use.</p>
				4883
				4884	<p class='crt'><span class="crtprompt"> $magick> </span><span class='crtin'>convert cockatoo.jpg profile.exif</span></p>
				4885	<p>It is important to note that results may depend on whether or not the original image already has an included profile. Also, keep in mind that <a href="#profile">-profile</a> is an "operator" (as opposed to a "setting") and therefore a conversion is made each time it is encountered, in order, in the command-line. For instance, in the following example, if the original image is CMYK with profile, a CMYK-CMYK-RGB conversion results.</p>
				4886
				4887	<p class='crt'><span class="crtprompt"> $magick> </span><span class='crtin'>convert CMYK.tif -profile "CMYK.icc" -profile "RGB.icc" RGB.tiff</span></p>
				4888	<p>Furthermore, since ICC profiles are not necessarily symmetric, extra conversion steps can yield unwanted results.
				4889	CMYK profiles are often very asymmetric since they involve 3−>4 and 4−>3 channel mapping.
				4890	</p>
				4891
				4892	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	4893	<h4><a id="quality"></a>-quality <em class="arg">value</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4894	</div>
				4895
				4896	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>JPEG/MIFF/PNG compression level.</td><td style='text-align:right;'></td></tr></table>
				4897
cristy	87a7f07	2011-07-01 00:08:52 +0000	[diff] [blame]	4898	<p>For the JPEG and MPEG image formats, quality is 1 (lowest image quality and
				4899	highest compression) to 100 (best quality but least effective compression).
				4900	The default is to use the estimated quality of your input image if it can
				4901	be determined, otherwise 92. When the quality is greater than 90, then the
				4902	chroma channels are not downsampled.
				4903	Use the <a href="#sampling-factor">-sampling-factor</a> option to specify the
				4904	factors for chroma downsampling.</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4905
				4906	<p>For the MIFF image format, quality/10 is the zlib compression level, which is 0 (worst but fastest compression) to 9 (best but slowest). It has no effect on the image appearance, since the compression is always lossless.</p>
				4907
cristy	851dbce	2010-08-06 21:40:00 +0000	[diff] [blame]	4908	<p>For the JPEG-2000 image format, quality is mapped using a non-linear equation to the compression ratio required by the Jasper library. This non-linear equation is intended to loosely approximate the quality provided by the JPEG v1 format. The default quality value 100, a request for non-lossy compression. A quality of 75 results in a request for 16:1 compression.</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4909
cristy	87a7f07	2011-07-01 00:08:52 +0000	[diff] [blame]	4910	<p>For the MNG and PNG image formats, the quality value sets the zlib
				4911	compression level (quality / 10) and filter-type (quality % 10). The default
				4912	PNG "quality" is 75, which means compression level 7 with adaptive PNG
				4913	filtering, unless the image has a color map, in which case it means
				4914	compression level 7 with no PNG filtering.</p>
				4915
				4916	<p>For compression level 0, the Huffman-only strategy is used, which is fastest but not necessarily the worst compression.</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4917
cristy	a4dfb12	2011-07-07 19:01:57 +0000	[diff] [blame]	4918	<p>If filter-type is 4 or less, the specified PNG filter-type is used for
				4919	all scanlines:</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4920
				4921	<pre class="text">
cristy	e9a32c3	2011-04-07 01:11:05 +0000	[diff] [blame]	4922	0: none
				4923	1: sub
				4924	2: up
				4925	3: average
				4926	4: Paeth
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4927	</pre>
				4928
cristy	87a7f07	2011-07-01 00:08:52 +0000	[diff] [blame]	4929	<p>If filter-type is 5, adaptive filtering is used when quality is greater
				4930	than 50 and the image does not have a color map, otherwise no filtering is
				4931	used.</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4932
cristy	87a7f07	2011-07-01 00:08:52 +0000	[diff] [blame]	4933	<p>If filter-type is 6, adaptive filtering
				4934	with <em class="arg">minimum-sum-of-absolute-values</em> is used.</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4935
cristy	87a7f07	2011-07-01 00:08:52 +0000	[diff] [blame]	4936	<p>Only if the output is MNG, if filter-type is 7, the LOCO color
				4937	transformation (intrapixel differencing) and adaptive filtering
				4938	with <em class="arg">minimum-sum-of-absolute-values</em> are used.</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4939
cristy	87a7f07	2011-07-01 00:08:52 +0000	[diff] [blame]	4940	<p>If the filter-type is 8 the zlib Z_RLE compression strategy is used with
				4941	no PNG filtering.</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4942
cristy	87a7f07	2011-07-01 00:08:52 +0000	[diff] [blame]	4943	<p>If the filter-type is 9 the zlib Z_RLE compression strategy is used with
				4944	adaptive PNG filtering.</p>
				4945
cristy	a4dfb12	2011-07-07 19:01:57 +0000	[diff] [blame]	4946	<p>The quality setting has no effect on the appearance or signature of PNG
				4947	and MNG images, since the compression is always lossless.</p>
				4948
				4949	<p>Not all combinations of compression level, strategy, and PNG filter type
				4950	can be obtained using the -quality option. For more precise control,
				4951	you can use the PNG:compression-level=N, PNG:compression-strategy=N, and
				4952	PNG:compression-filter=N defines, respectively, instead.
				4953	See <a href="#define">-define</a>. Values from the defines take precedence
				4954	over values from the -quality option.</p>
cristy	87a7f07	2011-07-01 00:08:52 +0000	[diff] [blame]	4955
				4956	<p>For further information, see
				4957	the <a href="http://www.w3.org/pub/WWW/TR">PNG</a> specification.</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4958
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4959	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	4960	<h4><a id="quantize"></a>-quantize <em class="arg">colorspace</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4961	</div>
				4962
cristy	3c98a4f	2010-08-13 20:09:41 +0000	[diff] [blame]	4963	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>reduce colors using this colorspace.</td><td style='text-align:right;'></td></tr></table>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4964
cristy	3c98a4f	2010-08-13 20:09:41 +0000	[diff] [blame]	4965	<p>This setting defines the colorspace used to sort out and reduce the number
				4966	of colors needed by an image (for later dithering) by operators such as <a
				4967	href="#colors" >-colors</a>, Note that color reducion also happens
				4968	automatically when saving images to color-limited image file formats, such as
				4969	GIF, and PNG8.</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4970
				4971
				4972	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	4973	<h4><a id="quiet"></a>-quiet</h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4974	</div>
				4975
				4976	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>suppress all warning messages. Error messages are still reported.</td><td style='text-align:right;'></td></tr></table>
				4977
				4978	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	4979	<h4><a id="radial-blur"></a>-radial-blur <em class="arg">angle</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4980	</div>
				4981
				4982	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Blur around the center of the image.</td><td style='text-align:right;'></td></tr></table>
				4983
				4984	<p>Note that this is actually a rotational blur rather than a radial and as
				4985	such actually mis-named. </p>
				4986
				4987	<p>The <a href="#virtual-pixel">-virtual-pixel</a> setting will determine how
				4988	pixels which are outside the image proper are blurred into the final result.
				4989	</p>
				4990
				4991
				4992	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	4993	<h4><a id="raise"></a>-raise <em class="arg">thickness</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	4994	</div>
				4995
				4996	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Lighten or darken image edges.</td><td style='text-align:right;'></td></tr></table>
				4997
				4998	<p>This will create a 3-D effect. Use <a href="#raise">-raise</a> to create a raised effect, otherwise use <a href="#raise">+raise</a>.
				4999	</p>
				5000
				5001	<p>Unlike the similar <a href="#frame">-frame</a> option, <a href="#raise">-raise</a> does not alter the dimensions of the image.</p>
				5002
				5003	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	5004	<h4><a id="random-threshold"></a>-random-threshold <em class="arg">low</em>x<em class="arg">high</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5005	</div>
				5006
				5007	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Apply a random threshold to the image.</td><td style='text-align:right;'></td></tr></table>
				5008
				5009	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	5010	<h4><a id="red-primary"></a>-red-primary <em class="arg">x,y</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5011	</div>
				5012
				5013	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Set the red chromaticity primary point.</td><td style='text-align:right;'></td></tr></table>
				5014
				5015	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	5016	<h4><a id="regard-warnings"></a>-regard-warnings</h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5017	</div>
				5018
				5019	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Pay attention to warning messages.</td><td style='text-align:right;'></td></tr></table>
				5020
				5021	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	5022	<h4><a id="remap"></a>-remap <em class="arg">filename</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5023	</div>
				5024
				5025	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Reduce the number of colors in an image to the colors used by this image.</td><td style='text-align:right;'></td></tr></table>
				5026
				5027	<p>If the <a href="#dither">-dither</a> setting is enabled (the default) then
				5028	the given colors are dithered over the image as necessary, otherwise the closest
				5029	color (in RGB colorspace) is selected to replace that pixel in the image. </p>
				5030
				5031	<p>As a side effect of applying a <a href="#remap">-remap</a> of colors across all
				5032	images in the current image sequence, all the images will have the same color
				5033	table. That means that when saved to a file format such as GIF, it will use
				5034	that color table as a single common or global color table, for all the images,
				5035	without requiring extra local color tables. </p>
				5036
				5037	<p>Use <a href="#remap">+remap</a> to reduce all images in the current image
				5038	sequence to use a common color map over all the images. This equivalent to
				5039	appending all the images together (without extra background colors) and color
				5040	reducing those images using <a href="#colors">-colors</a> with a 256 color
				5041	limit, then <a href="#remap">-remap</a> those colors over the original list of
				5042	images. This ensures all the images follow a single color map. </p>
				5043
				5044	<p>If the number of colors over all the images is less than 256, then <a
				5045	href="#remap">+remap</a> should not perform any color reduction or dithering, as
				5046	no color changes are needed. In that case, its only effect is to force the use
				5047	of a global color table. This recommended after using either <a
				5048	href="#colors">-colors</a> or <a href="#ordered-dither">-ordered-dither</a> to
				5049	reduce the number of colors in an animated image sequence. </p>
				5050
				5051	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	5052	<h4><a id="region"></a>-region <em class="arg">geometry</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5053	</div>
				5054
				5055	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Set a region in which subsequent operations apply.</td><td style='text-align:right;'></td></tr></table>
				5056
				5057	<p>The <em class="arg">x</em> and <em class="arg">y</em> offsets are treated in the same manner as in <a href="#crop">-crop</a>.</p>
				5058
				5059	<p>See <a href="../www/command-line-processing.html#geometry">Image Geometry</a> for complete details about the <em class="arg">geometry</em> argument.</p>
				5060
				5061	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	5062	<h4><a id="remote"></a>-remote</h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5063	</div>
				5064
				5065	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>perform a remote operation.</td><td style='text-align:right;'></td></tr></table>
				5066
				5067	<p>The only command recognized is the name of an image file to load.</p>
				5068
				5069	<p>If you have more than one <a href="../www/display.html">display</a> application running simultaneously, use the <a href="#window"> window</a> option to specify which application to control.</p>
				5070
				5071	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	5072	<h4><a id="render"></a>-render</h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5073	</div>
				5074
				5075	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>render vector operations.</td><td style='text-align:right;'></td></tr></table>
				5076
				5077	<p>Use <a href="#render">+render</a> to turn off rendering vector operations. This useful when saving the result to vector formats such as MVG or SVG.</p>
				5078
				5079	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	5080	<h4><a id="repage"></a>-repage <em class="arg">geometry</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5081	</div>
				5082
				5083	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Adjust the canvas and offset information of the image.</td><td style='text-align:right;'></td></tr></table>
				5084
				5085	<p>This option is like <a href="#page">-page</a> but acts as an image operator
				5086	rather than a setting. You can separately set the canvas size or the offset
				5087	of the image on that canvas by only providing those components. </p>
				5088
				5089	<p>See <a href="../www/command-line-processing.html#geometry">Image Geometry</a> for complete details about the <em class="arg">geometry</em> argument.</p>
				5090
				5091	<p>If a <kbd>!</kbd> flag is given the offset given is added to the existing
				5092	offset to move the image relative to its previous position. This useful for
				5093	animation sequences. </p>
				5094
				5095	<p>A given a canvas size of zero such as '<kbd>0x0</kbd>' forces it to
				5096	recalculate the canvas size so the image (at its current offset) will appear
				5097	completely on that canvas (unless it has a negative offset).</p>
				5098
				5099	<p>Use <a href="#repage">+repage</a> to completely remove/reset the virtual
				5100	canvas meta-data from the images. </p>
				5101
				5102	<p>The <a href="#set">-set</a> '<kbd>page</kbd>' option can be used to
				5103	directly assign virtual canvas meta-data. </p>
				5104
				5105
				5106	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	5107	<h4><a id="resample"></a>-resample <em class="arg">horizontal</em>x<em class="arg">vertical</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5108	</div>
				5109
				5110	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Resample image to specified horizontal and vertical resolution.</td><td style='text-align:right;'></td></tr></table>
				5111
				5112	<p>Resize the image so that its rendered size remains the same as the original at the specified target resolution. For example, if a 300 DPI image renders at 3 inches by 2 inches on a 300 DPI device, when the image has been resampled to 72 DPI, it will render at 3 inches by 2 inches on a 72 DPI device. Note that only a small number of image formats (e.g. JPEG, PNG, and TIFF) are capable of storing the image resolution. For formats which do not support an image resolution, the original resolution of the image must be specified via <a href="#density">-density</a> on the command line prior to specifying the resample resolution.</p>
				5113
				5114	<p>Note that Photoshop stores and obtains image resolution from a proprietary embedded profile. If this profile exists in the image, then Photoshop will continue to treat the image using its former resolution, ignoring the image resolution specified in the standard file header.</p>
				5115
				5116	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	5117	<h4><a id="resize"></a>-resize <em class="arg">geometry</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5118	</div>
				5119
				5120	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Resize an image.</td><td style='text-align:right;'></td></tr></table>
				5121
				5122	<p>See <a href="../www/command-line-processing.html#geometry">Image Geometry</a> for complete details about the <em class="arg">geometry</em> argument. Offsets, if present in the geometry string, are ignored, and the <a href="#gravity">-gravity</a> option has no effect.</p>
				5123
				5124	<p>If the <a href="#filter">-filter</a> option precedes the <a href="#resize">-resize</a> option, the image is resized with the specified filter.</p>
				5125
cristy	1353896	2010-02-26 17:53:04 +0000	[diff] [blame]	5126	<p>Many image processing algorithms assume your image is in a linear-light coding. If your image is gamma-corrected, you can remove the nonlinear gamma correction, apply the transform, then restore it like this:</p>
				5127
cristy	4949d52	2010-03-12 18:41:34 +0000	[diff] [blame]	5128	<p class='crt'><span class="crtprompt"> $magick> </span><span class='crtin'>convert portrait.jpg -gamma .45455 -resize 25% -gamma 2.2 \ <br/> -quality 92 passport.jpg</span></p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5129	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	5130	<h4><a id="respect-parentheses"></a>-respect-parentheses</h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5131	</div>
				5132
				5133	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>settings remain in effect until parenthesis boundary.</td><td style='text-align:right;'></td></tr></table>
				5134
				5135	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	5136	<h4><a id="reverse"></a>-reverse</h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5137	</div>
				5138
				5139	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Reverse the order of images in the current image list.</td><td style='text-align:right;'></td></tr></table>
				5140
				5141
				5142	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	5143	<h4><a id="roll"></a>-roll {<em class="arg">+-</em>}<em class="arg">x</em>{<em class="arg">+-</em>}<em class="arg">y</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5144	</div>
				5145
				5146	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>roll an image vertically or horizontally by the amount given.</td><td style='text-align:right;'></td></tr></table>
				5147
				5148	<p>A negative <em class="arg">x</em> offset rolls the image left-to-right. A negative <em class="arg">y</em> offset rolls the image top-to-bottom.</p>
				5149
				5150
				5151	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	5152	<h4><a id="rotate"></a>-rotate <em class="arg">degrees</em>{<em class="arg"><</em>}{<em class="arg">></em>}</h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5153	</div>
				5154
				5155	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Apply Paeth image rotation (using shear operations) to the image.</td><td style='text-align:right;'></td></tr></table>
				5156
				5157	<p>Use <kbd>></kbd> to rotate the image only if its width exceeds the height. <kbd><</kbd> rotates the image <em>only</em> if its width is less than the height. For example, if you specify <kbd>-rotate "-90>"</kbd> and the image size is 480x640, the image is not rotated. However, if the image is 640x480, it is rotated by -90 degrees. If you use <kbd>></kbd> or <kbd><</kbd>, enclose it in quotation marks to prevent it from being misinterpreted as a file redirection.</p>
				5158
				5159	<p>Empty triangles in the corners, left over from rotating the image, are
				5160	filled with the <kbd>background</kbd> color. </p>
				5161
				5162	<p>See also the <a href="#distort">-distort</a> operator and specifically the
				5163	'<kbd>ScaleRotateTranslate</kbd>' distort method. </p>
				5164
				5165
				5166	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	5167	<h4><a id="sample"></a>-sample <em class="arg">geometry</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5168	</div>
				5169
cristy	d0bd44a	2010-09-24 12:38:11 +0000	[diff] [blame]	5170	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>minify/magnify the image using pixel subsampling and pixel replication, respectively.</td><td style='text-align:right;'></td></tr></table>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5171
cristy	d0bd44a	2010-09-24 12:38:11 +0000	[diff] [blame]	5172	<p>Change the image size simply by directly sampling the pixels original
				5173	image. When magnifying, pixels are replicated in blocks. When minifying,
				5174	pixels are sub-sampled (i.e., some rows and columns are skipped over). </p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5175
cristy	d0bd44a	2010-09-24 12:38:11 +0000	[diff] [blame]	5176	<p>The results are thus equivalent to using <a href="#resize">-resize</a> with
				5177	a <a href="#filter">-filter</a> setting of <kbd>point</kbd> (nearest
				5178	neighbour), though <a href="#sample">-sample</a> is a lot faster, as it
				5179	avoids all the filter processing of the image. As such it completely ignores
				5180	the current <a href="#filter">-filter</a> setting. </p>
				5181
				5182	<p>The key feature of the <a href="#sample">-sample</a> is that no new colors
				5183	will be added to the resulting image, though some colors may disappear. </p>
				5184
				5185	<p>See <a href="../www/command-line-processing.html#geometry">Image Geometry</a> for complete details about the <em class="arg">geometry</em> argument. Offsets, if present in the geometry string, are
				5186	ignored, unlike <a href="#resize">-resize</a>. </p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5187
				5188
				5189	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	5190	<h4><a id="sampling-factor"></a>-sampling-factor <em class="arg">horizontal-factor</em>x<em class="arg">vertical-factor</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5191	</div>
				5192
				5193	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>sampling factors used by JPEG or MPEG-2 encoder and YUV decoder/encoder.</td><td style='text-align:right;'></td></tr></table>
				5194
				5195	<p>This option specifies the sampling factors to be used by the JPEG encoder for chroma downsampling. If this option is omitted, the JPEG library will use its own default values. When reading or writing the YUV format and when writing the M2V (MPEG-2) format, use <a href="#sampling-factor">-sampling-factor 2x1</a> or <a href="#sampling-factor">-sampling-factor 4:2:2</a> to specify the 4:2:2 downsampling method.</p>
				5196
				5197	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	5198	<h4><a id="scale"></a>-scale <em class="arg">geometry</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5199	</div>
				5200
cristy	d0bd44a	2010-09-24 12:38:11 +0000	[diff] [blame]	5201	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>minify/magnify the image using pixel block averaging and pixel replication, respectively.</td><td style='text-align:right;'></td></tr></table>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5202
cristy	d0bd44a	2010-09-24 12:38:11 +0000	[diff] [blame]	5203	<p>Change the image size simply by replacing pixels by averaging pixels
				5204	together when minifying, or replacing pixels when magnifing. </p>
				5205
				5206	<p>The results are thus equivalent to using <a href="#resize">-resize</a> with
				5207	a <a href="#filter">-filter</a> setting of <kbd>box</kbd>. Though it is a lot
				5208	faster, as it avoids all the filter processing of the image. As such it
				5209	completely ignores the current <a href="#filter">-filter</a> setting. </p>
				5210
				5211	<p>If when shrinking (minifying) images the original image is some integer
				5212	multiple of the new image size, the number of pixels avergaed together to
				5213	produce the new pixel color is the same across the whole image. This is
				5214	a special case known as 'binning' and is often used as a method of reducing
				5215	noise in image such as those generated by digital cameras, especially in low
				5216	light conditions. </p>
				5217
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5218
				5219	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	5220	<h4><a id="scene"></a>-scene <em class="arg">value</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5221	</div>
				5222
				5223	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>set scene number.</td><td style='text-align:right;'></td></tr></table>
				5224
				5225	<p>This option sets the scene number of an image or the first image in an image sequence.</p>
				5226
				5227	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	5228	<h4><a id="screen"></a>-screen</h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5229	</div>
				5230
				5231	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>specify the screen to capture.</td><td style='text-align:right;'></td></tr></table>
				5232
				5233	<p>This option indicates that the GetImage request used to obtain the image should be done on the root window, rather than directly on the specified window. In this way, you can obtain pieces of other windows that overlap the specified window, and more importantly, you can capture menus or other popups that are independent windows but appear over the specified window.</p>
				5234
				5235	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	5236	<h4><a id="seed"></a>-seed</h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5237	</div>
				5238
				5239	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>seed a new sequence of pseudo-random numbers</td><td style='text-align:right;'></td></tr></table>
				5240
				5241	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	5242	<h4><a id="segment"></a>-segment <em class="arg">cluster-threshold</em>x<em class="arg">smoothing-threshold</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5243	</div>
				5244
				5245	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>segment the colors of an image.</td><td style='text-align:right;'></td></tr></table>
				5246
				5247	<p>Segment an image by analyzing the histograms of the color components and identifying units that are homogeneous with the fuzzy c-means technique. This is part of the ImageMagick color quantization routines. </p>
				5248
				5249	<p>Specify <em class="arg">cluster threshold</em> as the number of pixels in each cluster that must exceed the cluster threshold to be considered valid. <em class="arg">Smoothing threshold</em> eliminates noise in the second derivative of the histogram. As the value is increased, you can expect a smoother second derivative. The default is 1.5.</p>
				5250
				5251	<p>If the <a href="#verbose">-verbose</a> setting is defined, a detailed report
				5252	of the color clusters is returned.</p>
				5253
				5254
				5255	<div style="margin: auto;">
cristy	8b9dd95	2011-03-21 22:56:18 +0000	[diff] [blame]	5256	<h4><a id="selective-blur"></a>-selective-blur <em class="arg">radius</em><br />-selective-blur <em class="arg">radius</em>x<em class="arg">sigma</em>{<em class="arg">+threshold</em>}</h4>
cristy	2e2662a	2010-10-09 14:29:37 +0000	[diff] [blame]	5257	</div>
				5258
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5259	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Selectively blur pixels within a contrast threshold.</td><td style='text-align:right;'></td></tr></table>
				5260
cristy	2e2662a	2010-10-09 14:29:37 +0000	[diff] [blame]	5261	<p>Blurs those pixels that are less than or equal to the threshold in contrast. The threshold may be expressed as a fraction of <em class="QR">QuantumRange</em> or as a percentage.</p>
				5262
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5263	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	5264	<h4><a id="separate"></a>-separate</h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5265	</div>
				5266
				5267	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>separate an image channel into a grayscale image. Specify the channel with <a href="#channel">-channel</a>.</td><td style='text-align:right;'></td></tr></table>
				5268
				5269	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	5270	<h4><a id="sepia-tone"></a>-sepia-tone <em class="arg">threshold</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5271	</div>
				5272
				5273	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>simulate a sepia-toned photo.</td><td style='text-align:right;'></td></tr></table>
				5274
				5275	<p>Specify <em class="arg">threshold</em> as the percent threshold of the intensity (0 - 99.9%).</p>
				5276
				5277	<p>This option applies a special effect to the image, similar to the effect achieved in a photo darkroom by sepia toning. Threshold ranges from 0 to <em class="QR">QuantumRange</em> and is a measure of the extent of the sepia toning. A threshold of 80% is a good starting point for a reasonable tone.</p>
				5278
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	5279
				5280
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5281	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	5282	<h4><a id="set"></a>-set <em class="arg">key value</em></h4>
				5283	<h4>+set <em class="arg">key</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5284	</div>
				5285
cristy	d0bd44a	2010-09-24 12:38:11 +0000	[diff] [blame]	5286	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>sets image attributes and properties for images in the current
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	5287	image sequence.</td><td style='text-align:right;'></td></tr></table>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5288
cristy	d0bd44a	2010-09-24 12:38:11 +0000	[diff] [blame]	5289	<p>This will assign (or modify) specific settings attached to all the images
				5290	in the current image sequence. Using the <a href="#set">+set</a> form of the
				5291	option will either remove, or reset that setting to a default state, as
				5292	appropriate. </p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5293
cristy	d0bd44a	2010-09-24 12:38:11 +0000	[diff] [blame]	5294	<p>For example, it will modify specific well known image meta-data
				5295	'attributes' such as those normally overridden by: the options <a
				5296	href="#delay" >-delay</a>, <a href="#dispose" >-dispose</a>, and <a
				5297	href="#page" >-page</a>, <a href="#colorspace" >-colorspace</a>; generally
				5298	assigned before the image is read in, by using a <em class="arg">key</em> of
				5299	the same name. </p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5300
cristy	d0bd44a	2010-09-24 12:38:11 +0000	[diff] [blame]	5301	<p>If the given <em class="arg">key</em> does not match a specific known
				5302	'attribute ', such as shown above, the setting is stored as a a free form
cristy	323f35b	2011-03-24 23:05:13 +0000	[diff] [blame]	5303	'property' string. Such settings are listed in <a href="#verbose"
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	5304	>-verbose</a> information ("<kbd>info:</kbd>" output format) as "Properties".
				5305	</p>
				5306
cristy	8413418	2011-06-15 22:59:00 +0000	[diff] [blame]	5307	<p>This includes string 'properties' that are set by and assigned to images
cristy	d0bd44a	2010-09-24 12:38:11 +0000	[diff] [blame]	5308	using the options <a href="#comment" >-comment</a>, <a href="#label"
				5309	>-label</a>, <a href="#caption" >-caption</a>. These options actually assign
				5310	a global 'artifact' which are automatically assigned (and any <a href="../www/escape.html" >Format Percent
				5311	Escapes</a> expanded) to images as they are read in. For example:</p>
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	5312
cristy	d0bd44a	2010-09-24 12:38:11 +0000	[diff] [blame]	5313	<p class='crt'><span class="crtprompt"> $magick> </span><span class='crtin'>convert rose: -set comment 'Rose is a rose is a rose is a rose' rose.png</span><span class='crtout'>identify -format %c rose.png</span><span class="crtprompt"> $magick> </span><span class='crtin'>Rose is a rose is a rose is a rose</span></p>
				5314	<p>The set value can also make use of <a href="../www/escape.html" >Format and Print Image
				5315	Properties</a> in the defined value. For example:</p>
				5316
				5317	<p class='crt'><span class="crtprompt"> $magick> </span><span class='crtin'>convert rose: -set origsize '%wx%h' -resize 50% \</span><span class='crtout'> -format 'Old size = %[origsize] New size = %wx%h' info:</span><span class="crtprompt"> $magick> </span><span class='crtin'>Old size = 70x46 New size = 35x23</span></p>
cristy	8413418	2011-06-15 22:59:00 +0000	[diff] [blame]	5318	<p>Other well known 'properties' that are availible include:
cristy	d0bd44a	2010-09-24 12:38:11 +0000	[diff] [blame]	5319	'<kbd>date:create</kbd>' and '<kbd>date:modify</kbd>' and
				5320	'<kbd>signature</kbd>'. </p>
				5321
				5322	<p>The <a href="#repage">-repage</a> operator will also allow you to modify
				5323	the '<kbd>page</kbd>' attribute of an image for images already in memory (also
				5324	see <a href="#repage">-page</a>). However it is designed to provide a finer
				5325	control of the sub-parts of this 'attribute'. The <a href="#set">-set page</a>
				5326	option will only provide a direct, unmodified assignment of '<kbd>page</kbd>'
				5327	attribute. </p>
				5328
				5329	<p>This option can also associate a colorspace or profile with your image.
				5330	For example,</p>
				5331
				5332	<p class='crt'><span class="crtprompt"> $magick> </span><span class='crtin'>convert image.psd -set profile ISOcoated_v2_eci.icc image-icc.psd</span></p>
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	5333	<p>Some 'properties' must be defined in a specific way to be used. For
				5334	example only 'properties' prefixed with "<kbd>filename:</kbd>" can be used to
				5335	modify the output filename of an image. For example</p>
				5336
				5337	<p class='crt'><span class="crtprompt"> $magick> </span><span class='crtin'>convert rose: -set filename:mysize '%wx%h' 'rose_%[filename:mysize].png'</span></p>
				5338	<p>If the setting value is prefixed with "<kbd>option:</kbd>" the setting will
				5339	be saved as a global "Artifact" exactly as if it was set using the <a
cristy	f9a6c46	2011-04-24 14:01:11 +0000	[diff] [blame]	5340	href="#define" >-define</a> option. As such settings are global in scope, they
cristy	8413418	2011-06-15 22:59:00 +0000	[diff] [blame]	5341	can be used to pass 'attributes' and 'properties' of one specific image,
cristy	d0bd44a	2010-09-24 12:38:11 +0000	[diff] [blame]	5342	in a way that allows you to use them in a completely different image, even if
				5343	the original image has long since been modified or destroyed. For example: </p>
				5344
				5345	<p class='crt'><span class="crtprompt"> $magick> </span><span class='crtin'>convert rose: -set option:rosesize '%wx%h' -delete 0 \</span><span class='crtout'> label:'%[rosesize]' label_size_of_rose.gif</span></p>
				5346	<p>Note that <a href="../www/escape.html" >Format Percent Escapes</a> will only match
				5347	a 'artifact' if the given <em class="arg">key</em> does not match an existing
cristy	323f35b	2011-03-24 23:05:13 +0000	[diff] [blame]	5348	'attribute' or 'property'. </p>
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	5349
				5350	<p>You can set the attributes of the image registry by prefixing the value
				5351	with <kbd>registry:</kbd>.</p>
				5352
cristy	8413418	2011-06-15 22:59:00 +0000	[diff] [blame]	5353	<p>The <a href="#set">-set profile</a> option can also be used to inject
				5354	previously-formatted ancillary chunks into the output PNG file, using
				5355	the commandline option as shown below or by setting the profile via a
				5356	programming interface:</p>
				5357
				5358	<p class='crt'><span class="crtprompt"> $magick> </span><span class='crtin'>convert in.png -set profile PNG-chunk-x:<filename> out.png</span></p>
				5359	<p>where <em>x</em> is a location flag and
				5360	<em class="arg">filename</em> is a file containing the chunk
				5361	name in the first 4 bytes, then a colon (":"), followed by the chunk data.
				5362	This encoder will compute the chunk length and CRC, so those must not
				5363	be included in the file.</p>
				5364
				5365	<p>"x" can be "b" (before PLTE), "m" (middle, i.e., between PLTE and IDAT),
				5366	or "e" (end, i.e., after IDAT). If you want to write multiple chunks
				5367	of the same type, then add a short unique string after the "x" to prevent
				5368	subsequent profiles from overwriting the preceding ones, e.g.,</p>
				5369
				5370
				5371	<p class='crt'><span class="crtprompt"> $magick> </span><span class='crtin'>convert in.png -set profile PNG-chunk-b01:file01 / <br/>
				5372	-profile PNG-chunk-b02:file02 out.png</span></p>
				5373	<p> </p>
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	5374
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5375
				5376	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	5377	<h4><a id="shade"></a>-shade <em class="arg">azimuth</em>x<em class="arg">elevation</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5378	</div>
				5379
				5380	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>shade the image using a distant light source.</td><td style='text-align:right;'></td></tr></table>
				5381
				5382	<p>Specify <em class="arg">azimuth</em> and <em class="arg">elevation</em> as the position of the light source. Use <a href="#shade">+shade</a> to return the shading results as a grayscale image.</p>
				5383
				5384	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	5385	<h4><a id="shadow"></a>-shadow <em class="arg">percent-opacity</em>{x<em class="arg">sigma</em>}{<em class="arg">+-</em>}<em class="arg">x</em>{<em class="arg">+-</em>}<em class="arg">y</em>{<em class="arg">%</em>}</h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5386	</div>
				5387
				5388	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>simulate an image shadow.</td><td style='text-align:right;'></td></tr></table>
				5389
				5390	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	5391	<h4><a
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5392	id="shared-memory"></a>-shared-memory</h4>
				5393	</div>
				5394
				5395	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>use shared memory.</td><td style='text-align:right;'></td></tr></table>
				5396
				5397	<p>This option specifies whether the utility should attempt to use shared memory for pixmaps. ImageMagick must be compiled with shared memory support, and the display must support the <em class="arg">MIT-SHM</em> extension. Otherwise, this option is ignored. The default is <kbd>True</kbd>.</p>
				5398
				5399	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	5400	<h4><a id="sharpen"></a>-sharpen <em class="arg">radius</em>{x<em class="arg">sigma</em>}</h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5401	</div>
				5402
				5403	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>sharpen the image.</td><td style='text-align:right;'></td></tr></table>
				5404
				5405	<p>Use a Gaussian operator of the given radius and standard deviation (sigma).</p>
				5406
				5407	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	5408	<h4><a id="shave"></a>-shave <em class="arg">geometry</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5409	</div>
				5410
				5411	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Shave pixels from the image edges.</td><td style='text-align:right;'></td></tr></table>
				5412
				5413	<p>The <em class="arg">size</em> portion of the <em class="arg">geometry</em> argument specifies the width of the region to be removed from both sides of the image and the height of the regions to be removed from top and bottom. Offsets are ignored.</p>
				5414
				5415	<p>See <a href="../www/command-line-processing.html#geometry">Image Geometry</a> for complete details about the <em class="arg">geometry</em> argument.</p>
				5416
				5417	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	5418	<h4><a id="shear"></a>-shear <em class="arg">Xdegrees</em>[x<em class="arg">Ydegrees</em>]</h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5419	</div>
				5420
				5421	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Shear the image along the x-axis and/or y-axis.</td><td style='text-align:right;'></td></tr></table>
				5422
				5423	<p>The shear angles may be positive, negative, or zero. When <em class="arg">Ydegrees</em> is omitted it defaults to 0. When both angles are given, the horizontal component of the shear is performed before the vertical component.</p>
				5424
				5425	<p>Shearing slides one edge of an image along the x-axis or y-axis (i.e., horizontally or vertically, respectively),creating a parallelogram. The amount of each is controlled by the respective shear angle. For horizontal shears, <em class="arg">Xdegrees</em> is measured clockwise relative to "up" (the negative y-axis), sliding the top edge to the right when 0°<<em class="arg">Xdegrees</em><90° and to the left when 90°<<em class="arg">Xdegrees</em><180°. For vertical shears <em class="arg">Ydegrees</em> is measured clockwise relative to "right" (the positive x-axis), sliding the right edge down when 0°<<em class="arg">Ydegrees</em><90° and up when 90°<<em class="arg">Ydegrees</em><180°.</p>
				5426
				5427	<p>Empty triangles left over from shearing the image are filled with the color defined by the <a href="#fill">-background</a> option. The color is specified using the format described under the <a href="#fill">-fill</a> option.</p>
				5428
				5429	<p>The horizontal shear is performed before the vertical part. This is important to note, since horizontal and vertical shears do not <em>commute</em>, i.e., the order matters in a sequence of shears. For example, the following two commands are not equivalent.</p>
				5430
				5431	<p class='crt'><span class="crtprompt"> $magick> </span><span class='crtin'>convert logo: -shear 20x0 -shear 0x60 logo-sheared.png</span><span class='crtout'></span><span class="crtprompt"> $magick> </span><span class='crtin'>convert logo: -shear 0x60 -shear 20x0 logo-sheared.png</span></p>
				5432	<p>The first of the two commands above is equivalent to the following, except for the amount of empty space created; the command that follows generates a smaller image, and so is a better choice in terms of time and space.</p>
				5433
				5434	<p class='crt'><span class="crtprompt"> $magick> </span><span class='crtin'>convert logo: -shear 20x60 logo-sheared.png</span></p>
				5435	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	5436	<h4><a id="sigmoidal-contrast"></a>-sigmoidal-contrast <em class="arg">contrast</em>x<em class="arg">mid-point</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5437	</div>
				5438
				5439	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>increase the contrast without saturating highlights or shadows.</td><td style='text-align:right;'></td></tr></table>
				5440
				5441	<p>Increase the contrast of the image using a sigmoidal transfer function without saturating highlights or shadows. <em class="arg">Contrast</em> indicates how much to increase the contrast (0 is none; 3 is typical; 20 is a lot); <em class="arg">mid-point</em> indicates where midtones fall in the resultant image (0 is white; 50% is middle-gray; 100% is black). By default the image contrast is increased, use <em class="arg">+sigmoidal-contrast</em> to decrease the contrast.</p>
				5442
				5443	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	5444	<h4><a id="silent"></a>-silent</h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5445	</div>
				5446
				5447	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>operate silently.</td><td style='text-align:right;'></td></tr></table>
				5448
				5449	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	5450	<h4><a id="size"></a>-size <em class="arg">width</em>[x<em class="arg">height</em>][<em class="arg">+offset</em>]</h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5451	</div>
				5452
				5453	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>set the width and height of the image.</td><td style='text-align:right;'></td></tr></table>
				5454
				5455	<p>Use this option to specify the width and height of raw images whose dimensions are unknown such as <kbd>GRAY</kbd>, <kbd>RGB</kbd>, or <kbd>CMYK</kbd>. In addition to width and height, use <a href="#size">-size</a> with an offset to skip any header information in the image or tell the number of colors in a <kbd>MAP</kbd> image file, (e.g. -size 640x512+256).</p>
				5456
				5457	<p>For Photo CD images, choose from these sizes:</p>
				5458
				5459	<pre class="text">
cristy	e9a32c3	2011-04-07 01:11:05 +0000	[diff] [blame]	5460	192x128
				5461	384x256
				5462	768x512
				5463	1536x1024
				5464	3072x2048
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5465	</pre>
				5466
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5467	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	5468	<h4><a id="sketch"></a>-sketch <em class="arg">radius</em><br />-sketch <em class="arg">radius</em>x<em class="arg">sigma</em>+<em class="arg">angle</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5469	</div>
				5470
				5471	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>simulate a pencil sketch.</td><td style='text-align:right;'></td></tr></table>
				5472
				5473	<p>Sketch with the given radius, standard deviation (sigma), and angle. The angle given is the angle toward which the image is sketched. That is the direction people would consider the object is coming from. </p>
				5474
				5475	<div style="margin: auto;">
cristy	2d67ddd	2011-02-13 15:38:23 +0000	[diff] [blame]	5476	<h4><a id="smush"></a>-smush <em class="arg">offset</em></h4>
				5477	</div>
				5478
				5479	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>smush an image sequence together.</td><td style='text-align:right;'></td></tr></table>
				5480
				5481	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	5482	<h4><a id="snaps"></a>-snaps <em class="arg">value</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5483	</div>
				5484
				5485	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Set the number of screen snapshots.</td><td style='text-align:right;'>[<a href="../www/import.html">import</a>]</td></tr></table>
				5486
				5487	<p>Use this option to grab more than one image from the X server screen, to create an animation sequence.</p>
				5488
				5489	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	5490	<h4><a id="solarize"></a>-solarize <em class="arg">threshold</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5491	</div>
				5492
				5493	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>negate all pixels above the threshold level.</td><td style='text-align:right;'></td></tr></table>
				5494
				5495	<p>Specify <em class="arg">factor</em> as the percent threshold of the intensity (0 - 99.9%).</p>
				5496
				5497	<p>This option produces a <em class="arg">solarization</em> effect seen when exposing a photographic film to light during the development process.</p>
				5498
				5499	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	5500	<h4><a id="sparse-color"></a>-sparse-color <em
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5501	class="arg">method</em> '<em class="arg">x</em>,<em class="arg">y</em> <em class="arg">color</em> ...'</h4>
				5502	</div>
				5503
				5504	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'> color the given image using the specified points of color, and filling the other intervening colors using the given methods. </td><td style='text-align:right;'></td></tr></table>
				5505
				5506
				5507	<table class="doc">
				5508	<tbody>
				5509	<tr valign="top">
				5510	<th align="left" style="width: 8%">Method</th>
				5511	<th align="left">Description</th>
				5512	</tr>
				5513
				5514	<tr valign="top">
cristy	acc0488	2011-05-04 23:03:43 +0000	[diff] [blame]	5515	<td valign="top">barycentric</td>
				5516	<td valign="top">three point triangle of color given 3 points.
				5517	Giving only 2 points will form a linear gradient between those points.
				5518	The gradient generated extends beyond the triangle created by those
				5519	3 points. </td>
				5520	</tr>
				5521
				5522	<tr valign="top">
				5523	<td valign="top">bilinear</td>
				5524	<td valign="top">Like barycentric but for 4 points. Less than 4 points
				5525	fall back to barycentric. </td>
				5526	</tr>
				5527	<tr valign="top">
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5528	<td valign="top">voronoi</td>
				5529	<td valign="top">Simply map each pixel to the to nearest color point
				5530	given. The result are polygonal 'cells' of solid color. </td>
				5531	</tr>
				5532
				5533	<tr valign="top">
				5534	<td valign="top">shepards</td>
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	5535	<td valign="top">Colors points biased on the ratio of inverse distance
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5536	squared. Generating spots of color in a sea of the average of
				5537	colors. </td>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5538	</tr>
				5539
				5540	<tr valign="top">
cristy	acc0488	2011-05-04 23:03:43 +0000	[diff] [blame]	5541	<td valign="top">inverse</td>
				5542	<td valign="top">Colors points biased on the ratio of inverse distance.
				5543	This generates sharper points of color rather than rounded spots of
				5544	'<kbd>shepards</kbd>' Generating spots of color in a sea of the
				5545	average of colors. </td>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5546	</tr>
				5547
				5548	</tbody>
				5549	</table>
				5550
				5551	<p>The points are placed according to the images location on the virtual
				5552	canvas (<a href="#page" >-page</a> or <a href="#repage" >-repage</a>
				5553	offset), and do not actually have to exist on the given image, but may be
				5554	some point beyond the edge of the image. All points are floating point values.
				5555	</p>
				5556
				5557	<p>Only the color channels defined by the <a href="#channel" >-channel</a> are
cristy	acc0488	2011-05-04 23:03:43 +0000	[diff] [blame]	5558	modified, which means that by default matte/alpha transparency channel is not
				5559	effected. Typically transparency channel is turned off either before or after
				5560	the operation. </P>
				5561
				5562	Of course if some color points are transparent to generate a transparent
				5563	gradient, then the image also requires transparency enabled to store the
				5564	values. </p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5565
				5566	<p>All the above methods when given a single point of color will replace all
				5567	the colors in the image with the color given, regardless of the point. This is
				5568	logical, and provides an alternative technique to recolor a image to some
				5569	default value. </p>
				5570
				5571
				5572	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	5573	<h4><a id="splice"></a>-splice <em class="arg">geometry</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5574	</div>
				5575
				5576	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Splice the current background color into the image.</td><td style='text-align:right;'></td></tr></table>
				5577
cristy	acc0488	2011-05-04 23:03:43 +0000	[diff] [blame]	5578	<p>This will add rows and columns of the current <a
				5579	href="#background">-background</a> color into the given image according to the
				5580	given <a href="#gravity">-gravity</a> effectd geometry setting. >See <a href="../www/command-line-processing.html#geometry">Image Geometry</a> for complete details about the <em class="arg">geometry</em> argument. Essentually <a href="#splice">-splice</a> will divide the
				5581	image into four quadrants, separating them by the inserted rows and columns.
				5582	</P>
				5583
				5584	If a dimension of geometry is zero no rows or columns will be added for that
				5585	dimension. Similarly using a zero offset with the appropriate <a
				5586	href="#gravity">-gravity</a> setting will add rows and columns to the edges of
				5587	the image, padding the image only along that one edge. Edge padding is what <a
				5588	href="#splice">-splice</a> is most commonly used for. </p>
				5589
				5590	<p>If the exact same <em class="arg">geometry</em> and <a
				5591	href="#gravity">-gravity</a> is later used with <a href="#chop">-chop</a> the
				5592	added added all splices removed. </p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5593
				5594	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	5595	<h4><a id="spread"></a>-spread <em class="arg">amount</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5596	</div>
				5597
				5598	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>displace image pixels by a random amount.</td><td style='text-align:right;'></td></tr></table>
				5599
				5600	<p>The argument <em class="arg">amount</em> defines the size of the neighborhood around each pixel from which to choose a candidate pixel to swap.</p>
				5601
				5602	<div style="margin: auto;">
cristy	323f35b	2011-03-24 23:05:13 +0000	[diff] [blame]	5603	<h4><a id="statistic"></a>-statistic <em class="arg">type</em> <em class="arg">geometry</em></h4>
cristy	b52981c	2011-03-19 17:09:31 +0000	[diff] [blame]	5604	</div>
				5605
				5606	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>replace each pixel with corresponding statistic from the neighborhood.</td><td style='text-align:right;'>[<a href="../www/convert.html">convert</a>, <a href="../www/mogrify.html">mogrify</a>]</td></tr></table>
				5607
				5608	<p>Choose from these statistic types:</p>
				5609	<pre class="text">
cristy	e9a32c3	2011-04-07 01:11:05 +0000	[diff] [blame]	5610	Gradient maximum difference in area
				5611	Maximum maximum value per channel in neighborhood
				5612	Minimum minimum value per channel in neighborhood
				5613	Mean average value per channel in neighborhood
				5614	Median median value per channel in neighborhood
				5615	Mode mode (most frequent) value per channel in neighborhood
				5616	Nonpeak value just before or after the median value per channel in neighborhood
cristy	b52981c	2011-03-19 17:09:31 +0000	[diff] [blame]	5617	</pre>
				5618
				5619	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	5620	<h4><a id="stegano"></a>-stegano <em class="arg">offset</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5621	</div>
				5622
				5623	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>hide watermark within an image.</td><td style='text-align:right;'></td></tr></table>
				5624
				5625	<p>Use an offset to start the image hiding some number of pixels from the beginning of the image. Note this offset and the image size. You will need this information to recover the steganographic image (e.g. display -size 320x256+35 stegano:image.png).</p>
				5626
				5627	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	5628	<h4><a id="stereo"></a>-stereo <em class="arg">+x</em>{<em class="arg">+y</em>}</h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5629	</div>
				5630
				5631	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>composite two images to create a stereo anaglyph.</td><td style='text-align:right;'>[<a href="../www/composite.html">composite</a>]</td></tr></table>
				5632
				5633	<p>The left side of the stereo pair is saved as the red channel of the output image. The right side is saved as the green channel. Red-green stereo glasses are required to properly view the stereo image.</p>
				5634
				5635	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	5636	<h4><a id="storage-type"></a>-storage-type <em class="arg">type</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5637	</div>
				5638
				5639	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>pixel storage type. Here are the valid types:</td><td style='text-align:right;'></td></tr></table>
				5640
				5641	<pre class="text">
cristy	e9a32c3	2011-04-07 01:11:05 +0000	[diff] [blame]	5642	char unsigned characters
				5643	double doubles
				5644	float floats
				5645	integer integers
				5646	long longs
				5647	quantum pixels in the native depth of your ImageMagick distribution
				5648	short unsigned shorts
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5649	</pre>
				5650
				5651	<p>Float and double types are normalized from 0.0 to 1.0 otherwise the pixels
				5652	values range from 0 to the maximum value the storage type can support.</p>
				5653
				5654	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	5655	<h4><a id="stretch"></a>-stretch <em class="arg">fontStretch</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5656	</div>
				5657
				5658	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Set a type of stretch style for fonts.</td><td style='text-align:right;'></td></tr></table>
				5659
				5660	<p>This setting suggests a type of stretch that ImageMagick should try to apply to the currently selected font family. Select <em class="arg">fontStretch</em> from the following.</p>
				5661
				5662	<pre class="text">
cristy	e9a32c3	2011-04-07 01:11:05 +0000	[diff] [blame]	5663	Any
				5664	Condensed
				5665	Expanded
				5666	ExtraCondensed
				5667	ExtraExpanded
				5668	Normal
				5669	SemiCondensed
				5670	SemiExpanded
				5671	UltraCondensed
				5672	UltraExpanded
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5673	</pre>
				5674
				5675	<p>To print a complete list of stretch types, use <a href="#list">-list stretch</a>.</p>
				5676
				5677	<p>For other settings that affect fonts, see the options <a href="#font">-font</a>, <a href="#family">-family</a>, <a href="#style">-style</a>, and <a href="#weight">-weight</a>. </p>
				5678
				5679	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	5680	<h4><a id="strip"></a>-strip</h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5681	</div>
				5682
				5683	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>strip the image of any profiles or comments.</td><td style='text-align:right;'></td></tr></table>
				5684
				5685	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	5686	<h4><a id="stroke"></a>-stroke <em class="arg">color</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5687	</div>
				5688
				5689	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>color to use when stroking a graphic primitive.</td><td style='text-align:right;'></td></tr></table>
				5690
				5691	<p>The color is specified using the format described under the <a href="#fill">-fill</a> option.</p>
				5692
				5693	<p>See <a href="#draw">-draw</a> for further details.</p>
				5694
				5695	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	5696	<h4><a id="strokewidth"></a>-strokewidth <em class="arg">value</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5697	</div>
				5698
				5699	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>set the stroke width.</td><td style='text-align:right;'></td></tr></table>
				5700
				5701	<p>See <a href="#draw">-draw</a> for further details.</p>
				5702
				5703	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	5704	<h4><a id="style"></a>-style <em class="arg">fontStyle</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5705	</div>
				5706
				5707	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Set a font style for text.</td><td style='text-align:right;'></td></tr></table>
				5708
cristy	71a3f60	2010-09-15 12:38:16 +0000	[diff] [blame]	5709	<p>This setting suggests a font style that ImageMagick should try to apply to
				5710	the currently selected font family. Select <em class="arg">fontStyle</em> from
				5711	the following.</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5712
				5713	<pre class="text">
cristy	e9a32c3	2011-04-07 01:11:05 +0000	[diff] [blame]	5714	Any
				5715	Italic
				5716	Normal
				5717	Oblique
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5718	</pre>
				5719
				5720	<p>For other settings that affect fonts, see the options <a href="#font">-font</a>, <a href="#family">-family</a>, <a href="#stretch">-stretch</a>, and <a href="#weight">-weight</a>. </p>
				5721
				5722	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	5723	<h4><a id="subimage-search"></a>-subimage-search</h4>
cristy	ae6203d	2010-08-09 01:12:14 +0000	[diff] [blame]	5724	</div>
				5725
cristy	d4d64ed	2010-08-22 22:19:33 +0000	[diff] [blame]	5726	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>search for subimage.</td><td style='text-align:right;'>[<a href="../www/compare.html">compare</a>]</td></tr></table>
				5727
cristy	71a3f60	2010-09-15 12:38:16 +0000	[diff] [blame]	5728	<p>This option is required to have compare search for the best match location
				5729	of a small image within a larger image. This search will produce two images
cristy	d0bd44a	2010-09-24 12:38:11 +0000	[diff] [blame]	5730	(or two frames). The first is the "difference" image and the second will
cristy	71a3f60	2010-09-15 12:38:16 +0000	[diff] [blame]	5731	be the "match score" image.</p>
				5732
cristy	d0bd44a	2010-09-24 12:38:11 +0000	[diff] [blame]	5733	<p>The "match-score" image is smaller containing a pixel for ever possible
cristy	71a3f60	2010-09-15 12:38:16 +0000	[diff] [blame]	5734	position of the top-left corner of the given sub-image. that is its size will
				5735	be the size of the larger_image - sub_image + 1. The brightest location in
				5736	this image is the location s the locate on the best match that is also
				5737	reported. Note that this may or may nor be a perfect match, and the actual
				5738	brightness will reflect this. Other bright 'peaks' can be used to locate other
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	5739	possible matching loctions. </p>
cristy	71a3f60	2010-09-15 12:38:16 +0000	[diff] [blame]	5740
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	5741	<p>Note that the search will try to compare teh sub-image at every possible
cristy	71a3f60	2010-09-15 12:38:16 +0000	[diff] [blame]	5742	location in the larger image, as such it can be very slow. The smaller the
cristy	d0bd44a	2010-09-24 12:38:11 +0000	[diff] [blame]	5743	sub-image the faster this search is. </p>
cristy	71a3f60	2010-09-15 12:38:16 +0000	[diff] [blame]	5744
cristy	ae6203d	2010-08-09 01:12:14 +0000	[diff] [blame]	5745
				5746	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	5747	<h4><a id="swap"></a>-swap <em class="arg">index,index</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5748	</div>
				5749
				5750	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Swap the positions of two images in the image sequence.</td><td style='text-align:right;'></td></tr></table>
				5751
cristy	71a3f60	2010-09-15 12:38:16 +0000	[diff] [blame]	5752	<p>For example, <a href="#swap">-swap 0,2</a> swaps the first and the third
				5753	images in the current image sequence. Use <a href="#swap">+swap</a> to switch
				5754	the last two images in the sequence.</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5755
				5756	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	5757	<h4><a id="swirl"></a>-swirl <em class="arg">degrees</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5758	</div>
				5759
				5760	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>swirl image pixels about the center.</td><td style='text-align:right;'></td></tr></table>
				5761
				5762	<p><em class="arg">Degrees</em> defines the tightness of the swirl.</p>
				5763
				5764	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	5765	<h4><a id="synchronize"></a>-synchronize</h4>
cristy	5063d81	2010-10-19 16:28:10 +0000	[diff] [blame]	5766	</div>
				5767
				5768	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>synchronize image to storage device.</td><td style='text-align:right;'></td></tr></table>
				5769
				5770	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	5771	<h4><a id="taint"></a>-taint</h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5772	</div>
				5773
cristy	5063d81	2010-10-19 16:28:10 +0000	[diff] [blame]	5774	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Mark the image as modified.</td><td style='text-align:right;'></td></tr></table>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5775
				5776	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	5777	<h4><a id="text-font"></a>-text-font <em class="arg">name</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5778	</div>
				5779
				5780	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>font for writing fixed-width text.</td><td style='text-align:right;'></td></tr></table>
				5781
				5782	<p>Specifies the name of the preferred font to use in fixed (typewriter style) formatted text. The default is 14 point <em class="arg">Courier</em>.</p>
				5783
				5784	<p>You can tag a font to specify whether it is a PostScript, TrueType, or OPTION1 font. For example, <kbd>Courier.ttf</kbd> is a TrueType font and <kbd>x:fixed</kbd> is OPTION1.</p>
				5785
				5786	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	5787	<h4><a id="texture"></a>-texture <em class="arg">filename</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5788	</div>
				5789
				5790	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>name of texture to tile onto the image background.</td><td style='text-align:right;'></td></tr></table>
				5791
				5792	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	5793	<h4><a id="threshold"></a>-threshold <em class="arg">value</em>{<em class="arg">%</em>}</h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5794	</div>
				5795
				5796	<!-- {<em class="arg">green,blue,opacity</em>}
				5797	<p>If the green or blue value is omitted, these channels use the same value as the first one provided. If all three color values are the same, the result is a bi-level image. If the opacity threshold is omitted, OpaqueOpacity is used and any partially transparent pixel becomes fully transparent.</p>
				5798	-->
				5799
				5800	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Apply simultaneous black/white threshold to the image.</td><td style='text-align:right;'></td></tr></table>
				5801
				5802	<p>Any pixel values (more specifically, those channels set using <a href="../www/command-line-options.html#channel">‑channel</a>) that exceed the specified threshold are reassigned the maximum channel value, while all other values are assigned the minimum.</p>
				5803
				5804	<p> The threshold value can be given as a percentage or as an absolute integer value corresponding to the desired channel value. When given as an integer, the minimum attainable value is 0 (corresponding to black when all channels are affected), but the maximum value (corresponding to white) is that of the <kbd>quantum depth</kbd> of the particular build of ImageMagick, and is therefore dependent on the installation. For that reason, a reasonable recommendation for most applications is to specify the threshold values as a percentage.
				5805	</p>
				5806
				5807	<p> The following would force pixels with red values above 50% to have 100% red values, while those at or below 50% red would be set to 0 in the red channel. The green, blue, and alpha channels (if present) would be unchanged. </p>
				5808
				5809	<p class='crt'><span class="crtprompt"> $magick> </span><span class='crtin'>convert in.png -channel red -threshold 50% out.png</span></p>
				5810	<p>As (possibly) impractical but instructive examples, the following would generate an all-black and an all-white image with the same dimensions as the input image.</p>
				5811
				5812
				5813	<p class='crt'><span class="crtprompt"> $magick> </span><span class='crtin'>convert in.png -threshold 100% black.png</span><span class='crtout'></span><span class="crtprompt"> $magick> </span><span class='crtin'>convert in.png -threshold -1 white.png</span></p>
				5814	<p>Note that the values of the transparency channel is treated as 'matte'
				5815	values (0 is opaque) and not as 'alpha' values (0 is transparent).</p>
				5816
				5817	<p> See also <a href="../www/command-line-options.html#black-threshold">‑black‑threshold</a> and <a href="../www/command-line-options.html#white-threshold">‑white‑threshold</a>.
				5818	</p>
				5819
				5820	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	5821	<h4><a id="thumbnail"></a>-thumbnail <em class="arg">geometry</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5822	</div>
				5823
				5824	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Create a thumbnail of the image.</td><td style='text-align:right;'></td></tr></table>
				5825
				5826	<p>This is similar to <a href="#resize">-resize</a>, except it is optimized for speed and any image profile, other than a color profile, is removed to reduce the thumbnail size. To strip the color profiles as well, add <a href="#strip">-strip</a> just before of after this option.</p>
				5827
				5828	<p>See <a href="../www/command-line-processing.html#geometry">Image Geometry</a> for complete details about the <em class="arg">geometry</em> argument.</p>
				5829
				5830	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	5831	<h4><a id="tile"></a>-tile <em class="arg">filename</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5832	</div>
				5833
				5834	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Set the tile image used for filling a subsequent graphic primitive.</td><td style='text-align:right;'></td></tr></table>
				5835
				5836	<div style="margin: auto;">
				5837	<h4>-tile <em class="arg">geometry</em></h4>
				5838	</div>
				5839
				5840	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Specify the layout of images .</td><td style='text-align:right;'>[<a href="../www/montage.html">montage</a>]</td></tr></table>
				5841
				5842	<p>See <a href="../www/command-line-processing.html#geometry">Image Geometry</a> for complete details about the <em class="arg">geometry</em> argument.</p>
				5843
				5844	<div style="margin: auto;">
				5845	<h4>-tile</h4>
				5846	</div>
				5847
				5848	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Specifies that a subsequent composite operation is repeated across and down image.</td><td style='text-align:right;'>[<a href="../www/composite.html">composite</a>]</td></tr></table>
				5849
				5850	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	5851	<h4><a id="tile-offset"></a>-tile-offset {<em class="arg">+-</em>}<em class="arg">x</em>{<em class="arg">+-</em>}<em class="arg">y</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5852	</div>
				5853
				5854	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Specify the offset for tile images, relative to the background image it is tiled on.</td><td style='text-align:right;'></td></tr></table>
				5855
				5856	<p>This should be set before the tiling image is set by <a href="#tile" >-tile</a> or <a href="#texture" >-texture</a>, or directly applied for creating a tiled canvas using <kbd>TILE:</kbd> or <kbd>PATTERN:</kbd> input formats. </p>
				5857
				5858	<p>Internally ImageMagick does a <a href="#roll" >-roll</a> of the tile image by the arguments given when the tile image is set. </p>
				5859
				5860	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	5861	<h4><a id="tint"></a>-tint <em class="arg">value</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5862	</div>
				5863
				5864	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Tint the image with the fill color.</td><td style='text-align:right;'></td></tr></table>
				5865
				5866	<p>Tint the image with the fill color.</p>
				5867
				5868	<p>Specify the amount of tinting as a percentage. Pure colors like black, white red, yellow, will not be affected by -tint. Only mid-range colors such as the various shades of grey.</p>
				5869
				5870	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	5871	<h4><a id="title"></a>-title <em class="arg">string</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5872	</div>
				5873
				5874	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Assign a title to displayed image.</td><td style='text-align:right;'>[<a href="../www/animate.html">animate</a>, <a href="../www/display.html">display</a>, <a href="../www/montage.html">montage</a>]</td></tr></table>
				5875
				5876	<p>Use this option to assign a specific title to the image. This assigned to the image window and is typically displayed in the window title bar. Optionally you can include the image filename, type, width, height, Exif data, or other image attribute by embedding special format characters described under the <a href="#format">-format</a> option.</p>
				5877
				5878	<p>For example,</p>
				5879
				5880	<p class="crtsnip">
				5881	-title "%m:%f %wx%h"
				5882	</p>
				5883
				5884	<p>produces an image title of <kbd>MIFF:bird.miff 512x480</kbd> for an image titled <kbd>bird.miff</kbd> and whose width is 512 and height is 480.</p>
				5885
				5886
				5887	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	5888	<h4><a id="transform"></a>-transform</h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5889	</div>
				5890
				5891	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>transform the image.</td><td style='text-align:right;'></td></tr></table>
				5892
				5893	<p>This option applies the transformation matrix from a previous <a href="#affine">-affine</a> option.</p>
				5894
				5895	<p class='crt'><span class="crtprompt"> $magick> </span><span class='crtin'>convert -affine 2,2,-2,2,0,0 -transform bird.ppm bird.jpg</span></p>
cristy	83a272e	2010-05-07 20:40:35 +0000	[diff] [blame]	5896
				5897	<p>This operator has been now been superseded by the <a
				5898	href="#distort">-distort</a> '<kbd>AffineProjection</kbd>' method. </p>
				5899
				5900
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5901	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	5902	<h4><a id="transparent"></a>-transparent <em class="arg">color</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5903	</div>
				5904
				5905	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Make this color transparent within the image.</td><td style='text-align:right;'></td></tr></table>
				5906
				5907	<p>The <em class="arg">color</em> argument is defined using the format
				5908	described under the <a href="#fill">-fill</a> option. The <a href="#fuzz"
				5909	>-fuzz</a> setting can be used to match and replace colors similar to the one
				5910	given. </p>
				5911
cristy	b36feb2	2010-03-26 16:54:37 +0000	[diff] [blame]	5912	<p>Use <a href="#transparent" >+transparent</a> to invert the pixels matched.
				5913	that is make all non-matching colors transparent. </p>
				5914
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5915	<p>The <a href="#opaque">-opaque</a> operator is exactly the same as <a
cristy	b36feb2	2010-03-26 16:54:37 +0000	[diff] [blame]	5916	href="#transparent" >-transparent</a> but replaces the matching color with the
				5917	current <a href="#fill">-fill</a> color setting, rather than transparent.
				5918	However the <a href="#transparent" >-transparent</a> operator also ensures
				5919	that the image has an alpha channel enabled, as per "<kbd><a href="#alpha"
				5920	>-alpha</a> set</kbd>", and does not require you to modify the <a
				5921	href="#channel">-channel</a> to enable alpha channel handling. </p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5922
cristy	b36feb2	2010-03-26 16:54:37 +0000	[diff] [blame]	5923	<p>Note that this does not define the color as being the 'transparency color'
				5924	used for color-mapped image formats, such as GIF. For that use <a
				5925	href="#transparent-color" >-transparent-color</a> </p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5926
				5927
				5928	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	5929	<h4><a id="transparent-color"></a>-transparent-color <em class="arg">color</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5930	</div>
				5931
				5932	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Set the transparent color.</td><td style='text-align:right;'></td></tr></table>
				5933
				5934	<p>Sometimes this is used for saving to image formats such as
				5935	GIF and PNG8 which uses this color to represent boolean transparency. This
				5936	does not make a color transparent, it only defines what color the transparent
				5937	color is in the color palette of the saved image. Use <a
				5938	href="#transparent">-transparent</a> to make an opaque color transparent.</p>
				5939
				5940	<p>This option allows you to have both an opaque visible color, as well as a
				5941	transparent color of the same color value without conflict. That is, you can
				5942	use the same color for both the transparent and opaque color areas within an
				5943	image. This, in turn, frees to you to select a transparent color that is
				5944	appropriate when an image is displayed by an application that does not handle a
				5945	transparent color index, while allowing ImageMagick to correctly handle images of this
				5946	type. </p>
				5947
				5948	<p>The default transparent color is <kbd>#00000000</kbd>, which is fully transparent black.</p>
				5949
				5950	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	5951	<h4><a id="transpose"></a>-transpose</h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5952	</div>
				5953
				5954	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Mirror the image along the top-left to bottom-right diagonal.</td><td style='text-align:right;'></td></tr></table>
				5955
				5956	<p> This option mathematically transposes the pixel array. It is equivalent to the sequence <kbd>-flip -rotate 90</kbd>.
				5957	</p>
				5958
				5959	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	5960	<h4><a id="transverse"></a>-transverse</h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5961	</div>
				5962
				5963	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Mirror the image along the images bottom-left top-right diagonal. Equivalent to the operations <kbd>-flop -rotate 90</kbd>.</td><td style='text-align:right;'></td></tr></table>
				5964
				5965
				5966	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	5967	<h4><a id="treedepth"></a>-treedepth <em class="arg">value</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5968	</div>
				5969
				5970	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>tree depth for the color reduction algorithm.</td><td style='text-align:right;'></td></tr></table>
				5971
				5972	<p>Normally, this integer value is zero or one. A value of zero or one causes the use of an optimal tree depth for the color reduction algorithm.</p>
				5973
				5974	<p>An optimal depth generally allows the best representation of the source image with the fastest computational speed and the least amount of memory. However, the default depth is inappropriate for some images. To assure the best representation, try values between 2 and 8 for this parameter. Refer to the <a href="../www/quantize.html">color reduction algorithm</a> for more details.</p>
				5975
				5976	<p>The <a href="#colors">-colors</a> or <a href="#monochrome">-monochrome</a> option, or writing to an image format which requires color reduction, is required for this option to take effect.</p>
				5977
				5978	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	5979	<h4><a id="trim"></a>-trim</h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5980	</div>
				5981
				5982	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>trim an image.</td><td style='text-align:right;'></td></tr></table>
				5983
				5984	<p>This option removes any edges that are exactly the same color as the corner pixels. Use <a href="#fuzz">-fuzz</a> to make <a href="#trim">-trim</a> remove edges that are nearly the same color as the corner pixels.</p>
				5985
				5986	<p>The page or virtual canvas information of the image is preserved allowing
				5987	you to extract the result of the <a href="#trim">-trim</a> operation from the
				5988	image. Use a <a href="#repage">+repage</a> to remove the virtual canvas page
				5989	information if it is unwanted.</p>
				5990
				5991	<p>If the trimmed image 'disappears' an warning is produced, and a special
				5992	single pixel transparent 'missed' image is returned, in the same way as when a
				5993	<a href="#crop">-crop</a> operation 'misses' the image proper. </p>
				5994
				5995
				5996	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	5997	<h4><a id="type"></a>-type <em class="arg">type</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	5998	</div>
				5999
				6000	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>the image type.</td><td style='text-align:right;'></td></tr></table>
cristy	efb2bdb	2010-11-20 19:35:22 +0000	[diff] [blame]	6001	<p>Choose from: <kbd>Bilevel</kbd>, <kbd>Grayscale</kbd>, <kbd>GrayscaleMatte</kbd>, <kbd>Palette</kbd>, <kbd>PaletteMatte</kbd>, <kbd>TrueColor</kbd>, <kbd>TrueColorMatte</kbd>, <kbd>ColorSeparation</kbd>, or <kbd>ColorSeparationMatte</kbd>.</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	6002
				6003	<p>Normally, when a format supports different subformats such as grayscale and truecolor, the encoder will try to choose an efficient subformat. The <a href="#type">-type</a> option can be used to overrride this behavior. For example, to prevent a JPEG from being written in grayscale format even though only gray pixels are present, use.</p>
				6004
				6005	<p class='crt'><span class="crtprompt"> $magick> </span><span class='crtin'>convert bird.png -type TrueColor bird.jpg</span></p>
				6006	<p>Similarly, use <a href="#type">-type TrueColorMatte</a> to force the encoder to write an alpha channel even though the image is opaque, if the output format supports transparency.</p>
				6007
				6008	<p>Use <a href="#type">-type optimize</a> to ensure the image is written in the smallest possible file size.</p>
				6009
				6010	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	6011	<h4><a id="undercolor"></a>-undercolor <em class="arg">color</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	6012	</div>
				6013
				6014	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>set the color of the annotation bounding box.</td><td style='text-align:right;'></td></tr></table>
				6015
				6016	<p>The color is specified using the format described under the <a href="#fill">-fill</a> option.</p>
				6017
				6018	<p>See <a href="#draw">-draw</a> for further details.</p>
				6019
				6020
				6021	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	6022	<h4><a id="update"></a>-update <em class="arg">seconds</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	6023	</div>
				6024
				6025	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>detect when image file is modified and redisplay.</td><td style='text-align:right;'></td></tr></table>
				6026
				6027	<p>Suppose that while you are displaying an image the file that is currently displayed is over-written. <kbd>display</kbd> will automagically detect that the input file has been changed and update the displayed image accordingly.</p>
				6028
				6029
				6030	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	6031	<h4><a id="unique-colors"></a>-unique-colors</h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	6032	</div>
				6033
				6034	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>discard all but one of any pixel color.</td><td style='text-align:right;'></td></tr></table>
				6035
				6036
				6037	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	6038	<h4><a id="units"></a>-units <em class="arg">type</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	6039	</div>
				6040
				6041	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>the units of image resolution.</td><td style='text-align:right;'></td></tr></table>
				6042
				6043	<p>Choose from: <kbd>Undefined</kbd>, <kbd>PixelsPerInch</kbd>, or <kbd>PixelsPerCentimeter</kbd>. This option is normally used in conjunction with the <a href="#density">-density</a> option.</p>
				6044
				6045
				6046	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	6047	<h4><a id="unsharp"></a>-unsharp <em class="arg">radius</em><br />-unsharp <em class="arg">radius</em>x<em class="arg">sigma</em>{<em class="arg">+amount</em>}{<em class="arg">+threshold</em>}</h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	6048	</div>
				6049
				6050	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>sharpen the image with an unsharp mask operator.</td><td style='text-align:right;'></td></tr></table>
				6051
				6052	<p>The <a href="#unsharp">-unsharp</a> option sharpens an image. The image is convolved with a Gaussian operator of the given radius and standard deviation (sigma). For reasonable results, radius should be larger than sigma. Use a radius of 0 to have the method select a suitable radius.</p>
				6053
				6054	<p>The parameters are:</p>
				6055
				6056	<pre class="text">
cristy	e9a32c3	2011-04-07 01:11:05 +0000	[diff] [blame]	6057	radius The radius of the Gaussian, in pixels, not counting the center
				6058	pixel (default 0).
				6059	sigma The standard deviation of the Gaussian, in pixels (default 1.0).
				6060	amount The fraction of the difference between the original and the blur
				6061	image that is added back into the original (default 1.0).
				6062	threshold The threshold, as a fraction of <em class="QR">QuantumRange</em>, needed to apply the
				6063	difference amount (default 0.05).
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	6064	</pre>
				6065
				6066
				6067	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	6068	<h4><a id="verbose"></a>-verbose</h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	6069	</div>
				6070
cristy	d0bda5e	2010-09-21 16:22:45 +0000	[diff] [blame]	6071	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>print detailed information about the image when this option precedes the <a href="#identify">-identify</a> option or <kbd>info:</kbd>.</td><td style='text-align:right;'></td></tr></table>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	6072
				6073
				6074	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	6075	<h4><a id="version"></a>-version</h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	6076	</div>
				6077
				6078	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>print ImageMagick version string and exit.</td><td style='text-align:right;'></td></tr></table>
				6079
				6080
				6081	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	6082	<h4><a id="view"></a>-view <em class="arg">string</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	6083	</div>
				6084
				6085	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>FlashPix viewing parameters.</td><td style='text-align:right;'></td></tr></table>
				6086
				6087
				6088	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	6089	<h4><a id="vignette"></a>-vignette <em class="arg">radius</em>{x<em class="arg">sigma</em>}{<em class="arg">+-</em>}<em class="arg">x</em>{<em class="arg">+-</em>}<em class="arg">y</em>{<em class="arg">%</em>}</h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	6090	</div>
				6091
				6092	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>soften the edges of the image in vignette style.</td><td style='text-align:right;'></td></tr></table>
				6093
				6094
				6095	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	6096	<h4><a id="virtual-pixel"></a>-virtual-pixel <em class="arg">method</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	6097	</div>
				6098
				6099	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Specify contents of <em>virtual pixels</em>.</td><td style='text-align:right;'></td></tr></table>
				6100
				6101	<p>This option defines what color source should be used if and when a color
				6102	lookup completely 'misses' the source image. The color(s) that appear to
				6103	surround the source image. Generally this color is derived from the source
				6104	image, but could also be set to a specify background color. </p>
				6105
				6106	<p>Choose from these methods:</p>
				6107
				6108	<pre class="text">
cristy	e9a32c3	2011-04-07 01:11:05 +0000	[diff] [blame]	6109	background the area surrounding the image is the background color
				6110	black the area surrounding the image is black
				6111	checker-tile alternate squares with image and background color
				6112	dither non-random 32x32 dithered pattern
				6113	edge extend the edge pixel toward infinity
				6114	gray the area surrounding the image is gray
				6115	horizontal-tile horizontally tile the image, background color above/below
				6116	horizontal-tile-edge horizontally tile the image and replicate the side edge pixels
				6117	mirror mirror tile the image
				6118	random choose a random pixel from the image
				6119	tile tile the image (default)
				6120	transparent the area surrounding the image is transparent blackness
				6121	vertical-tile vertically tile the image, sides are background color
				6122	vertical-tile-edge vertically tile the image and replicate the side edge pixels
				6123	white the area surrounding the image is white
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	6124	</pre>
				6125
				6126	<p>The default value is "edge".</p>
				6127
				6128	<p>This most important for distortion operators such as <a href="#distort"
				6129	>-distort</a>, <a href="#implode" >-implode</a>, and <a href="#fx" >-fx</a>.
				6130	However it also effects operations that may access pixels just outside the
				6131	image proper, such as <a href="#convolve">-convolve</a>, <a
				6132	href="#blur">-blur</a>, and <a href="#sharpen">-sharpen</a>. </p>
				6133
				6134	<p>To print a complete list of virtual pixel types, use the <a href="#list">-list virtual-pixel</a> option.</p>
				6135
				6136
				6137	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	6138	<h4><a id="visual"></a>-visual <em class="arg">type</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	6139	</div>
				6140
				6141	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Animate images using this X visual type.</td><td style='text-align:right;'>[<a href="../www/animate.html">animate</a>, <a href="../www/display.html">display</a>]</td></tr></table>
				6142
				6143	<p>Choose from these visual classes:</p>
				6144
				6145	<pre class="text">
cristy	e9a32c3	2011-04-07 01:11:05 +0000	[diff] [blame]	6146	StaticGray
				6147	GrayScale
				6148	StaticColor
				6149	PseudoColor
				6150	TrueColor
				6151	DirectColor
				6152	default
				6153	visual id
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	6154	</pre>
				6155
				6156	<p>The X server must support the visual you choose, otherwise an error occurs. If a visual is not specified, the visual class that can display the most simultaneous colors on the default screen is chosen.</p>
				6157
				6158
				6159	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	6160	<h4><a id="watermark"></a>-watermark <em
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	6161	class="arg">brightness</em>x<em class="arg">saturation</em></h4>
				6162	</div>
				6163
				6164	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Watermark an image using the given percentages of brightness and
				6165	saturation.</td><td style='text-align:right;'>[<a href="../www/composite.html">composite</a>]</td></tr></table>
				6166
				6167	<p>Take a grayscale image (with alpha mask) and modify the destination image's
				6168	brightness according to watermark image's grayscale value and the <em
				6169	class="arg">brightness</em> percentage. The destinations color saturation
				6170	attribute is just direct modified by the <em class="arg">saturation</em>
				6171	percentage, which defaults to 100 percent (no color change). </p>
				6172
				6173
				6174	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	6175	<h4><a id="wave"></a>-wave <em class="arg">amplitude</em><br />-wave <em class="arg">amplitude</em>x<em class="arg">wavelength</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	6176	</div>
				6177
				6178	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Shear the columns of an image into a sine wave.</td><td style='text-align:right;'></td></tr></table>
				6179
				6180	<p>Specify <em class="arg">amplitude</em> and <em class="arg">wavelength</em> of the wave.</p>
				6181
				6182	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	6183	<h4><a id="weight"></a>-weight <em class="arg">fontWeight</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	6184	</div>
				6185
				6186	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Set a font weight for text.</td><td style='text-align:right;'></td></tr></table>
				6187
				6188	<p>This setting suggests a font weight that ImageMagick should try to apply to the currently selected font family. Use a positive integer for <em class="arg">fontWeight</em> or select from the following.</p>
				6189
				6190	<table class="doc">
				6191	<col width="25%" />
				6192	<col width="75%" />
				6193	<thead>
				6194	<tr>
				6195	<th><em class="arg">fontWeight</em></th>
				6196	<th>Description</th>
				6197	</tr>
				6198	</thead>
				6199	<tbody>
				6200	<tr><td>All </td> <td>No effect. </td></tr>
				6201	<tr><td>Bold </td> <td>Same as <em class="arg">fontWeight</em> = 700.</td></tr>
				6202	<tr><td>Bolder </td> <td>Add 100 to font weight if currently ≤ 800.</td></tr>
				6203	<tr><td>Lighter </td> <td>Subtract 100 to font weight if currently ≤ 100.</td></tr>
				6204	<tr><td>Normal </td> <td>Same as <em class="arg">fontWeight</em> = 400.</td></tr>
				6205	</tbody>
				6206	</table>
				6207
				6208	<p>To print a complete list of weight types, use <a href="#list">-list weight</a>.</p>
				6209
				6210	<p>For other settings that affect fonts, see the options <a href="#font">-font</a>, <a href="#family">-family</a>, <a href="#stretch">-stretch</a>, and <a href="#style">-style</a>. </p>
				6211
				6212	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	6213	<h4><a id="white-point"></a>-white-point <em class="arg">x,y</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	6214	</div>
				6215
				6216	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>chromaticity white point.</td><td style='text-align:right;'></td></tr></table>
				6217
				6218	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	6219	<h4><a id="white-threshold"></a>-white-threshold <em class="arg">value</em>{<em class="arg">%</em>}</h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	6220	</div>
				6221
cristy	5cadd61	2009-09-21 19:33:41 +0000	[diff] [blame]	6222	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Force to white all pixels above the threshold while leaving all pixels at or below the threshold unchanged.</td><td style='text-align:right;'></td></tr></table>
				6223
				6224	<p> The threshold value can be given as a percentage or as an absolute integer value within [0, <em class="QR">QuantumRange</em>] corresponding to the desired <a href="../www/command-line-options.html#channel">‑channel</a> value. See <a href="../www/command-line-options.html#threshold">‑threshold</a> for more details on thresholds and resulting values.
				6225	</p>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	6226
				6227	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	6228	<h4><a id="window"></a>-window <em class="arg">id</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	6229	</div>
				6230
				6231	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>Make the image the background of a window.</td><td style='text-align:right;'>[<a href="../www/animate.html">animate</a>, <a href="../www/display.html">display</a>]</td></tr></table>
				6232
				6233	<p><em class="arg">id</em> can be a window id or name. Specify <kbd>root</kbd> to select X's root window as the target window.</p>
				6234
				6235	<p>By default the image is tiled onto the background of the target window. If <kbd>backdrop</kbd> or <a href="#geometry">-resize</a> are specified, the image is surrounded by the background color. Refer to <kbd>X RESOURCES</kbd> for details.</p>
				6236
				6237	<p>The image will not display on the root window if the image has more unique colors than the target window colormap allows. Use <a href="#colors">-colors</a> to reduce the number of colors.</p>
				6238
				6239	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	6240	<h4><a id="window-group"></a>-window-group</h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	6241	</div>
				6242
				6243	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>specify the window group.</td><td style='text-align:right;'></td></tr></table>
				6244
				6245	<div style="margin: auto;">
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	6246	<h4><a id="write"></a>-write <em class="arg">filename</em></h4>
cristy	3ed852e	2009-09-05 21:47:34 +0000	[diff] [blame]	6247	</div>
				6248
				6249	<table style='background-color:#FFFFE0; margin-left:40px; margin-right:40px; width:88%'><tr><td style='width:75%'>write an image sequence.</td><td style='text-align:right;'></td></tr></table>
				6250	<p>The image sequence preceding the <a href="#write">-write</a> <em class="arg">filename</em> option is written out, and processing continues with the same image in its current state if there are additional options. To restore the image to its original state after writing it, use the <a href="#write">+write</a> <em class="arg">filename</em> option.</p>
				6251
				6252	<p>Use <a href="#compress">-compress</a> to specify the type of image compression.</p>
cristy	dcca3fa	2010-12-29 21:50:07 +0000	[diff] [blame]	6253	</div>
				6254	</div>
cristy	3eaa0ef	2010-03-06 20:35:26 +0000	[diff] [blame]	6255
				6256	</div>
				6257
				6258	<div id="linkbar">
cristy	ce69bb0	2010-07-27 19:49:46 +0000	[diff] [blame]	6259	<span id="linkbar-west"> </span>
cristy	3eaa0ef	2010-03-06 20:35:26 +0000	[diff] [blame]	6260	<span id="linkbar-center">
				6261	<a href="http://www.imagemagick.org/discourse-server/">Discourse Server</a> •
cristy	a890294	2010-07-30 00:49:52 +0000	[diff] [blame]	6262	<a href="http://www.imagemagick.org/MagickStudio/scripts/MagickStudio.cgi">Studio</a>
cristy	3eaa0ef	2010-03-06 20:35:26 +0000	[diff] [blame]	6263	</span>
				6264	<span id="linkbar-east"> </span>
				6265	</div>
				6266	<div class="footer">
cristy	1454be7	2011-12-19 01:52:48 +0000	[diff] [blame]	6267	<span id="footer-west">© 1999-2012 ImageMagick Studio LLC</span>
cristy	3eaa0ef	2010-03-06 20:35:26 +0000	[diff] [blame]	6268	<span id="footer-east"> <a href="http://www.imagemagick.org/script/contact.php">Contact the Wizards</a></span>
				6269	</div>
				6270	<div style="clear: both; margin: 0; width: 100%; "></div>
cristy	a890294	2010-07-30 00:49:52 +0000	[diff] [blame]	6271	<script type="text/javascript">
				6272	var _gaq = _gaq \|\| [];
				6273	_gaq.push(['_setAccount', 'UA-17690367-1']);
				6274	_gaq.push(['_trackPageview']);
				6275
				6276	(function() {
				6277	var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;
				6278	ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';
				6279	var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);
				6280	})();
				6281	</script>
cristy	3eaa0ef	2010-03-06 20:35:26 +0000	[diff] [blame]	6282	</body>
				6283	</html>