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gerrit-public.fairphone.software / platform / external / ImageMagick / d4acac9ad6e83b5b892057bc21de8562f3b7acf5 / . / www / compare.html
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cristy3eaa0ef2010-03-06 20:35:26 +0000[diff] [blame]1
cristydcca3fa2010-12-29 21:50:07 +0000[diff] [blame]2<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
3 "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
cristy2bd2a982011-02-15 00:52:58 +0000[diff] [blame]4<html version="-//W3C//DTD XHTML 1.1//EN"
5 xmlns="http://www.w3.org/1999/xhtml" xml:lang="en"
6 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
7 xsi:schemaLocation="http://www.w3.org/1999/xhtml
8 http://www.w3.org/MarkUp/SCHEMA/xhtml11.xsd">
cristy3eaa0ef2010-03-06 20:35:26 +0000[diff] [blame]9<head>
cristy751980d2012-06-03 23:18:35 +0000[diff] [blame]10 <meta http-equiv="content-type" content="text/html; charset=UTF-8"/>
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cristyffb69ed2010-12-25 00:06:48 +0000[diff] [blame]12 <title>ImageMagick: Command-line Tools: Compare</title>
cristy751980d2012-06-03 23:18:35 +0000[diff] [blame]13 <meta http-equiv="content-language" content="en-US"/>
14 <meta http-equiv="content-type" content="text/html; charset=utf-8"/>
15 <meta http-equiv="reply-to" content="magick-users@imagemagick.org"/>
16 <meta name="application-name" content="ImageMagick"/>
17 <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."/>
18 <meta name="application-url" content="http://www.imagemagick.org"/>
19 <meta name="generator" content="PHP"/>
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23 <meta name="generator" content="ImageMagick Studio LLC"/>
24 <meta name="author" content="ImageMagick Studio LLC"/>
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27 <meta name="copyright" content="Copyright (c) 1999-2012 ImageMagick Studio LLC"/>
28 <meta name="distribution" content="Global"/>
cristydcca3fa2010-12-29 21:50:07 +0000[diff] [blame]29 <link rel="icon" href="../images/wand.png"/>
cristy3c98a4f2010-08-13 20:09:41 +0000[diff] [blame]30 <link rel="shortcut icon" href="../images/wand.ico" type="images/x-icon"/>
cristy29c5c992011-06-25 13:58:49 +0000[diff] [blame]31 <link rel="canonical" href="http://www.imagemagick.org" />
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cristyeed6cb62012-01-28 19:38:34 +0000[diff] [blame]33 <!-- Add jQuery library -->
34 <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.7/jquery.min.js"></script>
35
36 <!-- Optionaly include easing and/or mousewheel plugins -->
37 <script type="text/javascript" src="http://www.imagemagick.org/fancybox/jquery.easing-1.3.pack.js"></script>
38 <script type="text/javascript" src="http://www.imagemagick.org/fancybox/jquery.mousewheel-3.0.6.pack.js"></script>
39
40 <!-- Add fancyBox -->
cristy751980d2012-06-03 23:18:35 +0000[diff] [blame]41 <link rel="stylesheet" href="http://www.imagemagick.org/fancybox/jquery.fancybox.css?v=2.0.4" type="text/css" media="screen" />
42 <script type="text/javascript" src="http://www.imagemagick.org/fancybox/jquery.fancybox.pack.js?v=2.0.4"></script>
cristyeed6cb62012-01-28 19:38:34 +0000[diff] [blame]43
44 <!-- Optionaly include button and/or thumbnail helpers -->
cristy751980d2012-06-03 23:18:35 +0000[diff] [blame]45 <link rel="stylesheet" href="http://www.imagemagick.org/fancybox/helpers/jquery.fancybox-buttons.css?v=2.0.4" type="text/css" media="screen" />
46 <script type="text/javascript" src="http://www.imagemagick.org/fancybox/helpers/jquery.fancybox-buttons.js?v=2.0.4"></script>
cristyeed6cb62012-01-28 19:38:34 +0000[diff] [blame]47
cristy751980d2012-06-03 23:18:35 +0000[diff] [blame]48 <link rel="stylesheet" href="http://www.imagemagick.org/fancybox/helpers/jquery.fancybox-thumbs.css?v=2.0.4" type="text/css" media="screen" />
49 <script type="text/javascript" src="http://www.imagemagick.org/fancybox/helpers/jquery.fancybox-thumbs.js?v=2.0.4"></script>
cristyeed6cb62012-01-28 19:38:34 +0000[diff] [blame]50 <script type="text/javascript">
51 $(document).ready(function() {
52 $(".fancybox").fancybox();
53 });
54 </script>
55 <!-- ImageMagick style -->
cristy7a40ba82011-01-08 20:31:18 +0000[diff] [blame]56 <link rel="stylesheet" href="http://www.google.com/cse/style/look/default.css" type="text/css" />
cristy3c98a4f2010-08-13 20:09:41 +0000[diff] [blame]57 <style type="text/css" media="all">
58 @import url("../www/magick.css");
59 </style>
cristy3eaa0ef2010-03-06 20:35:26 +0000[diff] [blame]60</head>
61
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65 <script type="text/javascript">
66 <!--
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cristyaf8d6652011-02-04 21:57:45 +0000[diff] [blame]78 <img src="../images/logo.jpg"
79 alt="ImageMagick Logo"
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cristyaf8d6652011-02-04 21:57:45 +0000[diff] [blame]82 <img src="../images/sprite.jpg"
83 alt="ImageMagick Sprite"
cristy3eaa0ef2010-03-06 20:35:26 +0000[diff] [blame]84 style="width: 114px; height: 118px; border: 0px; float: right;" /></a>
85</div>
86
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238<div class="main">
239
cristydcca3fa2010-12-29 21:50:07 +0000[diff] [blame]240<h1>ImageMagick Compare Command-line Tool</h1>
cristy751980d2012-06-03 23:18:35 +0000[diff] [blame]241<p class="navigation-index">[<a href="compare.html#usage">Example Usage</a> &bull; <a href="compare.html#options">Option Summary</a>]</p>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]242
cristy751980d2012-06-03 23:18:35 +0000[diff] [blame]243<div class="doc-section">
244<p>Use the <kbd>compare</kbd> program to mathematically and visually annotate the difference between an image and its reconstruction. See <a href="command-line-processing.html">Command Line Processing</a> for advice on how to structure your <kbd>compare</kbd> command or see below for example usages of the command.</p>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]245</div>
246
cristy751980d2012-06-03 23:18:35 +0000[diff] [blame]247<h2><a id="usage"></a>Example Usage</h2>
248<div class="doc-section">
249
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]250<p>We list a few examples of the <kbd>compare</kbd> command here to illustrate its usefulness and ease of use. To get started, lets compare an image to one thats been sharpened:</p>
251
cristyeed6cb62012-01-28 19:38:34 +0000[diff] [blame]252<p class='crt'><span class="crtprompt"> $ </span><span class='crtin'>convert rose.jpg -sharpen 0x1 reconstruct.jpg</span><span class='crtout'></span><span class="crtprompt"> $ </span><span class='crtin'>compare rose.jpg reconstruct.jpg difference.png</span><span class='crtout'></span><span class="crtprompt"> $ </span><span class='crtin'>compare -compose src rose.jpg reconstruct.jpg difference.png</span></p>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]253<div class="image">
254<p>
255 <a href="../images/rose.jpg"><img src="../images/rose.jpg" width="70" height="46" alt="rose" /></a>
256 <a href="../images/reconstruct.jpg"><img src="../images/reconstruct.jpg" width="70" height="46" alt="rose" /></a>
257 <img style="margin:13px 0;" src="../images/right.gif" width="20" height="20" alt="==>" />
258 <a href="../images/difference.png"><img src="../images/difference.png" width="70" height="46" alt="rose" /></a>
259</p>
260</div>
261
262<p>The red areas of the difference image emphasizes (highlight) pixels that are affected by the image sharpening, whereas white de-emphasizes (lowlight) pixels that are untouched by the sharpening process.</p>
263
264<p>In addition to the visual interpretation of the difference in an image and its reconstruction, we report a mathematical measure of the difference:</p>
265
cristyeed6cb62012-01-28 19:38:34 +0000[diff] [blame]266<p class='crt'><span class="crtprompt"> $ </span><span class='crtin'>compare -verbose -metric mae rose.jpg reconstruct.jpg difference.png</span><span class='crtout'>Image: rose.jpg <br/>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]267 Channel distortion: MAE <br/>
268 red: 2282.91 (0.034835) <br/>
269 green: 1853.99 (0.0282901) <br/>
270 blue: 2008.67 (0.0306503) <br/>
271 all: 1536.39 (0.0234439) <br/></span></p><p>Or, if you just want the red channel distortion, use this command:</p>
272
cristyeed6cb62012-01-28 19:38:34 +0000[diff] [blame]273<p class='crt'><span class="crtprompt"> $ </span><span class='crtin'>compare -channel red -metric PSNR rose.jpg reconstruct.jpg difference.png</span><span class='crtout'>19.63</span></p>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]274<p>Or, if you just want the overall image distortion, use this command:</p>
275
cristyeed6cb62012-01-28 19:38:34 +0000[diff] [blame]276<p class='crt'><span class="crtprompt"> $ </span><span class='crtin'>compare -metric PSNR rose.jpg reconstruct.jpg difference.png</span><span class='crtout'>28.31</span></p>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]277<p>If the reconstructed image is a subimage of the image, the compare program returns the best match offset. In addition, it returns a similarity image such that an exact match location is completely white and if none of the pixels match, black, otherwise some gray level in-between:</p>
278
cristyeed6cb62012-01-28 19:38:34 +0000[diff] [blame]279<p class='crt'><span class="crtprompt"> $ </span><span class='crtin'>compare -metric RMSE -subimage-search logo.png wizard.jpg similarity.gif</span><span class='crtout'>85.05 (0.00129778) @ 353,157</span></p>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]280<p>You can find additional examples of using <kbd>compare</kbd> in <a href="http://www-106.ibm.com/developerworks/library/l-graf/?ca=dnt-428">Graphics from the Command Line</a>. Further discussion is available in <a href="http://www-106.ibm.com/developerworks/library/l-graf2/?ca=dgr-lnxw15GraphicsLine">More Graphics from the Command Line</a> and <a href="http://www.imagemagick.org/Usage/">Examples of ImageMagick Usage</a>.</p>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]281</div>
282
cristy751980d2012-06-03 23:18:35 +0000[diff] [blame]283<h2><a id="options"></a>Option Summary</h2>
284<div class="doc-section">
285
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]286<p>The <kbd>compare</kbd> command recognizes these options. Click on an option to get more details about how that option works.</p>
287
288<table class="doc">
289 <tbody>
290 <tr>
291 <th align="left">Option</th>
292 <th align="left">Description</th>
293 </tr>
294
295 <tr>
cristy751980d2012-06-03 23:18:35 +0000[diff] [blame]296 <td valign="top"><a href="command-line-options.html#alpha">-alpha</a></td>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]297 <td valign="top">on, activate, off, deactivate, set, opaque, copy",
298transparent, extract, background, or shape the alpha channel</td>
299 </tr>
300
301 <tr>
cristy751980d2012-06-03 23:18:35 +0000[diff] [blame]302 <td valign="top"><a href="command-line-options.html#authenticate">-authenticate <em class="option">value</em></a></td>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]303 <td valign="top">decrypt image with this password</td>
304 </tr>
305
306 <tr>
cristy751980d2012-06-03 23:18:35 +0000[diff] [blame]307 <td valign="top"><a href="command-line-options.html#channel">-channel <em class="option">type</em></a></td>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]308 <td valign="top">apply option to select image channels</td>
309 </tr>
310
311 <tr>
cristy751980d2012-06-03 23:18:35 +0000[diff] [blame]312 <td valign="top"><a href="command-line-options.html#colorspace">-colorspace <em class="option">type</em></a></td>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]313 <td valign="top">set image colorspace</td>
314 </tr>
315
316 <tr>
cristy751980d2012-06-03 23:18:35 +0000[diff] [blame]317 <td valign="top"><a href="command-line-options.html#compose">-compose <em class="option">operator</em></a></td>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]318 <td valign="top">set image composite operator</td>
319 </tr>
320
321 <tr>
cristy751980d2012-06-03 23:18:35 +0000[diff] [blame]322 <td valign="top"><a href="command-line-options.html#decipher">-decipher <em class="option">filename</em></a></td>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]323 <td valign="top">convert cipher pixels to plain</td>
324 </tr>
325
326 <tr>
cristy751980d2012-06-03 23:18:35 +0000[diff] [blame]327 <td valign="top"><a href="command-line-options.html#debug">-debug <em class="option">events</em></a></td>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]328 <td valign="top">display copious debugging information</td>
329 </tr>
330
331 <tr>
cristy751980d2012-06-03 23:18:35 +0000[diff] [blame]332 <td valign="top"><a href="command-line-options.html#define">-define <em class="option">format:option</em></a></td>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]333 <td valign="top">define one or more image format options</td>
334 </tr>
335
336 <tr>
cristy751980d2012-06-03 23:18:35 +0000[diff] [blame]337 <td valign="top"><a href="command-line-options.html#density">-density <em class="option">geometry</em></a></td>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]338 <td valign="top">horizontal and vertical density of the image</td>
339 </tr>
340
341 <tr>
cristy751980d2012-06-03 23:18:35 +0000[diff] [blame]342 <td valign="top"><a href="command-line-options.html#depth">-depth <em class="option">value</em></a></td>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]343 <td valign="top">image depth</td>
344 </tr>
345
346 <tr>
cristy751980d2012-06-03 23:18:35 +0000[diff] [blame]347 <td valign="top"><a href="command-line-options.html#disimilarity-threshold">-disimilarity-threshold <em class="option">value</em></a></td>
cristy771f7a72010-11-27 21:42:59 +0000[diff] [blame]348 <td valign="top">maximum distortion for (sub)image match (default 0.2)</td>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]349 </tr>
350
351 <tr>
cristy751980d2012-06-03 23:18:35 +0000[diff] [blame]352 <td valign="top"><a href="command-line-options.html#encipher">-encipher <em class="option">filename</em></a></td>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]353 <td valign="top">convert plain pixels to cipher pixels</td>
354 </tr>
355
356 <tr>
cristy751980d2012-06-03 23:18:35 +0000[diff] [blame]357 <td valign="top"><a href="command-line-options.html#extract">-extract <em class="option">geometry</em></a></td>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]358 <td valign="top">extract area from image</td>
359 </tr>
360
361 <tr>
cristy751980d2012-06-03 23:18:35 +0000[diff] [blame]362 <td valign="top"><a href="command-line-options.html#fuzz">-fuzz <em class="option">distance</em></a></td>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]363 <td valign="top">colors within this distance are considered equal</td>
364 </tr>
365
366 <tr>
cristy751980d2012-06-03 23:18:35 +0000[diff] [blame]367 <td valign="top"><a href="command-line-options.html#help">-help</a></td>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]368 <td valign="top">print program options</td>
369 </tr>
370
371 <tr>
cristy751980d2012-06-03 23:18:35 +0000[diff] [blame]372 <td valign="top"><a href="command-line-options.html#highlight-color">-highlight-color <em class="option">color</em></a></td>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]373 <td valign="top">emphasize pixel differences with this color</td>
374 </tr>
375
376 <tr>
cristy751980d2012-06-03 23:18:35 +0000[diff] [blame]377 <td valign="top"><a href="command-line-options.html#identify">-identify</a></td>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]378 <td valign="top">identify the format and characteristics of the image</td>
379 </tr>
380
381 <tr>
cristy751980d2012-06-03 23:18:35 +0000[diff] [blame]382 <td valign="top"><a href="command-line-options.html#interlace">-interlace <em class="option">type</em></a></td>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]383 <td valign="top">type of image interlacing scheme</td>
384 </tr>
385
386 <tr>
cristy751980d2012-06-03 23:18:35 +0000[diff] [blame]387 <td valign="top"><a href="command-line-options.html#limit">-limit <em class="option">type value</em></a></td>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]388 <td valign="top">pixel cache resource limit</td>
389 </tr>
390
391 <tr>
cristy751980d2012-06-03 23:18:35 +0000[diff] [blame]392 <td valign="top"><a href="command-line-options.html#log">-log <em class="option">format</em></a></td>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]393 <td valign="top">format of debugging information</td>
394 </tr>
395
396 <tr>
cristy751980d2012-06-03 23:18:35 +0000[diff] [blame]397 <td valign="top"><a href="command-line-options.html#lowlight-color">-lowlight-color <em class="option">color</em></a></td>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]398 <td valign="top">de-emphasize pixel differences with this color</td>
399 </tr>
400
401 <tr>
cristy751980d2012-06-03 23:18:35 +0000[diff] [blame]402 <td valign="top"><a href="command-line-options.html#metric">-metric <em class="option">type</em></a></td>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]403 <td valign="top">measure differences between images with this metric</td>
404 </tr>
405
406 <tr>
cristy751980d2012-06-03 23:18:35 +0000[diff] [blame]407 <td valign="top"><a href="command-line-options.html#profile">-profile <em class="option">filename</em></a></td>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]408 <td valign="top">add, delete, or apply an image profile</td>
409 </tr>
410
411 <tr>
cristy751980d2012-06-03 23:18:35 +0000[diff] [blame]412 <td valign="top"><a href="command-line-options.html#quality">-quality <em class="option">value</em></a></td>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]413 <td valign="top">JPEG/MIFF/PNG compression level</td>
414 </tr>
415
416 <tr>
cristy751980d2012-06-03 23:18:35 +0000[diff] [blame]417 <td valign="top"><a href="command-line-options.html#quantize">-quantize <em class="option">colorspace</em></a></td>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]418 <td valign="top">reduce image colors in this colorspace</td>
419 </tr>
420
421 <tr>
cristy751980d2012-06-03 23:18:35 +0000[diff] [blame]422 <td valign="top"><a href="command-line-options.html#quiet">-quiet</a></td>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]423 <td valign="top">suppress all warning messages</td>
424 </tr>
425
426 <tr>
cristy751980d2012-06-03 23:18:35 +0000[diff] [blame]427 <td valign="top"><a href="command-line-options.html#regard-warnings">-regard-warnings</a></td>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]428 <td valign="top">pay attention to warning messages.</td>
429 </tr>
430
431 <tr>
cristy751980d2012-06-03 23:18:35 +0000[diff] [blame]432 <td valign="top"><a href="command-line-options.html#respect-parentheses">-respect-parentheses</a></td>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]433 <td valign="top">settings remain in effect until parenthesis boundary.</td>
434 </tr>
435
436 <tr>
cristy751980d2012-06-03 23:18:35 +0000[diff] [blame]437 <td valign="top"><a href="command-line-options.html#sampling-factor">-sampling-factor <em class="option">geometry</em></a></td>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]438 <td valign="top">horizontal and vertical sampling factor</td>
439 </tr>
440
441 <tr>
cristy751980d2012-06-03 23:18:35 +0000[diff] [blame]442 <td valign="top"><a href="command-line-options.html#seed">-seed <em class="option">value</em></a></td>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]443 <td valign="top">seed a new sequence of pseudo-random numbers</td>
444 </tr>
445
446 <tr>
cristy751980d2012-06-03 23:18:35 +0000[diff] [blame]447 <td valign="top"><a href="command-line-options.html#set">-set <em class="option">attribute value</em></a></td>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]448 <td valign="top">set an image attribute</td>
449 </tr>
450
451 <tr>
cristy751980d2012-06-03 23:18:35 +0000[diff] [blame]452 <td valign="top"><a href="command-line-options.html#size">-size <em class="option">geometry</em></a></td>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]453 <td valign="top">width and height of image</td>
454 </tr>
455
456 <tr>
cristy751980d2012-06-03 23:18:35 +0000[diff] [blame]457 <td valign="top"><a href="command-line-options.html#subimage-search">-subimage-search</a></td>
cristyae6203d2010-08-09 01:12:14 +0000[diff] [blame]458 <td valign="top">search for subimage</td>
459 </tr>
460
461 <tr>
cristy751980d2012-06-03 23:18:35 +0000[diff] [blame]462 <td valign="top"><a href="command-line-options.html#synchronize">-synchronize</a></td>
cristy5063d812010-10-19 16:28:10 +0000[diff] [blame]463 <td valign="top">synchronize image to storage device</td>
464 </tr>
465
466 <tr>
cristy751980d2012-06-03 23:18:35 +0000[diff] [blame]467 <td valign="top"><a href="command-line-options.html#taint">-taint</a></td>
cristy5063d812010-10-19 16:28:10 +0000[diff] [blame]468 <td valign="top">mark the image as modified</td>
469 </tr>
470
471 <tr>
cristy751980d2012-06-03 23:18:35 +0000[diff] [blame]472 <td valign="top"><a href="command-line-options.html#transparent-color">-transparent-color <em class="option">color</em></a></td>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]473 <td valign="top">transparent color</td>
474 </tr>
475
476 <tr>
cristy751980d2012-06-03 23:18:35 +0000[diff] [blame]477 <td valign="top"><a href="command-line-options.html#verbose">-verbose</a></td>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]478 <td valign="top">print detailed information about the image</td>
479 </tr>
480
481 <tr>
cristy751980d2012-06-03 23:18:35 +0000[diff] [blame]482 <td valign="top"><a href="command-line-options.html#version">-version</a></td>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]483 <td valign="top">print version information</td>
484 </tr>
485
486 <tr>
cristy751980d2012-06-03 23:18:35 +0000[diff] [blame]487 <td valign="top"><a href="command-line-options.html#virtual-pixel">-virtual-pixel <em class="option">method</em></a></td>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]488 <td valign="top">access method for pixels outside the boundaries of the image</td>
489 </tr>
490
491 </tbody>
492</table>
cristy751980d2012-06-03 23:18:35 +0000[diff] [blame]493</div>
cristy3eaa0ef2010-03-06 20:35:26 +0000[diff] [blame]494
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