| <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
|
| "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
|
| <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
|
| <head>
|
| <meta http-equiv="Content-Type" value="application/xhtml+xml" />
|
| <meta name="verify-v1" content="g222frIIxcQTrvDR3NBRUSKP3AnMNoqxOkIniCEkV7U=" />
|
| <link rel="meta" type="application/rdf+xml" title="ICI" href="http://imagemagick.org/ici.rdf" />
|
| <style type="text/css" media="screen,projection"><!--
|
| @import url("../../www/magick.css");
|
| --></style>
|
| <link rel="shortcut icon" href="../../images/wand.ico" type="images/vnd.microsoft.icon"/> |
| <title>ImageMagick: MagickCore, C API for ImageMagick: Image Features</title> |
| <meta http-equiv="Content-Language" content="en-US"/> |
| <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/> |
| <meta http-equiv="Reply-to" content="magick-users@imagemagick.org"/> |
| <meta name="Generator" content="PHP"/> |
| <meta name="Keywords" content="magickcore, c, api, for, imagemagick:, image, features, ImageMagick, ImageMagic, MagickCore, MagickWand, PerlMagick, Magick++, RMagick, PythonMagick, JMagick, TclMagick, Image, Magick, Magic, Wand, ImageMagickObject, Swiss, Army, Knife, Image, Processing"/> |
| <meta name="Description" content="ImageMagick® is a software suite to create, edit, and compose bitmap images. It can read, convert and write images in a variety of formats (about 100) including GIF, JPEG, JPEG-2000, PNG, PDF, PhotoCD, TIFF, and DPX. Use ImageMagick to translate, flip, mirror, rotate, scale, shear and transform images, adjust image colors, apply various special effects, or draw text, lines, polygons, ellipses and Bézier curves. ImageMagick is free software delivered as a ready-to-run binary distribution or as source code that you can freely use, copy, modify, and distribute. Its license is compatible with the GPL. It runs on all major operating systems. The functionality of ImageMagick is typically utilized from the command line or you can use the features from programs written in your favorite programming language. Choose from these interfaces: MagickCore (C), MagickWand (C), ChMagick (Ch), Magick++ (C++), JMagick (Java), L-Magick (Lisp), PascalMagick (Pascal), PerlMagick (Perl), MagickWand for PHP (PHP), PythonMagick (Python), RMagick (Ruby), or TclMagick (Tcl/TK). With a language interface, use ImageMagick to modify or create images automagically and dynamically."/> |
| <meta name="Rating" content="GENERAL"/> |
| <meta name="Robots" content="INDEX, FOLLOW"/> |
| <meta name="Generator" content="ImageMagick Studio LLC"/> |
| <meta name="Author" content="ImageMagick Studio LLC"/> |
| <meta name="Revisit-after" content="2 DAYS"/> |
| <meta name="Resource-type" content="document"/> |
| <meta name="Copyright" content="Copyright (c) 1999-2010 ImageMagick Studio LLC"/> |
| <meta name="Distribution" content="Global"/> |
| </head>
|
|
|
| <body id="www-imagemagick-org">
|
| <div class="titlebar">
|
| <a href="../../index.html">
|
| <img src="../../images/script.png" alt="[ImageMagick]"
|
| style="width: 350px; height: 60px; margin: 28px auto; float: left;" /></a>
|
| <a href="http://www.networkredux.com">
|
| <img src="../../images/networkredux.png" alt="[sponsor]"
|
| style="margin: 45px auto; border: 0px; float: left;" /></a>
|
| <a href="http://www.imagemagick.org/discourse-server/">
|
| <img src="../../images/logo.jpg" alt=""
|
| style="width: 114px; height: 118px; border: 0px; float: right;" /></a>
|
| <a href="../../index.html">
|
| <img src="../../images/sprite.jpg" alt=""
|
| style="width: 114px; height: 118px; border: 0px; float: right;" /></a>
|
| </div>
|
|
|
| <div class="eastbar">
|
|
|
| <div class="menu"> |
| <a href="../../index.html">About ImageMagick</a> |
| </div> |
| <div class="sep"></div>
|
| <div class="menu"> |
| <a href="../../www/command-line-tools.html">Command-line Tools</a> |
| </div> |
| <div class="sub"> |
| <a href="../../www/command-line-processing.html">Processing</a> |
| </div> |
| <div class="sub"> |
| <a href="../../www/command-line-options.html">Options</a> |
| </div> |
| <div class="sub"> |
| <a href="http://www.imagemagick.org/Usage/">Usage</a> |
| </div> |
| <div class="menu"> |
| <a href="../../www/api.html">Program Interfaces</a> |
| </div> |
| <div class="sub"> |
| <a href="../../www/magick-wand.html">MagickWand</a> |
| </div> |
| <div class="sub"> |
| <a href="../../www/magick-core.html">MagickCore</a> |
| </div> |
| <div class="sub"> |
| <a href="../../www/perl-magick.html">PerlMagick</a> |
| </div> |
| <div class="sub"> |
| <a href="../../Magick++/">Magick++</a> |
| </div> |
| <div class="menu"> |
| <a href="../../www/architecture.html">Architecture</a> |
| </div> |
| <div class="sep"></div>
|
| <div class="menu"> |
| <a href="../../www/install-source.html">Install from Source</a> |
| </div> |
| <div class="sub"> |
| <a href="../../www/install-source.html#unix">Unix</a> |
| </div> |
| <div class="sub"> |
| <a href="../../www/install-source.html#windows">Windows</a> |
| </div> |
| <div class="menu"> |
| <a href="../../www/binary-releases.html">Binary Releases</a> |
| </div> |
| <div class="sub"> |
| <a href="../../www/binary-releases.html#unix">Unix</a> |
| </div> |
| <div class="sub"> |
| <a href="../../www/binary-releases.html#macosx">Mac OS X</a> |
| </div> |
| <div class="sub"> |
| <a href="../../www/binary-releases.html#windows">Windows</a> |
| </div> |
| <div class="menu"> |
| <a href="../../www/resources.html">Resources</a> |
| </div> |
| <div class="sep"></div>
|
| <div class="menu"> |
| <a href="../../www/download.html">Download</a> |
| </div> |
| <div class="sep"></div>
|
| <div class="menu"> |
| <a href="../http://www.imagemagick.org/script/search.php">Search</a> |
| </div> |
| <div class="sep"></div>
|
| <div class="menu"> |
| <a href="../../www/sitemap.html">Site Map</a> |
| </div> |
| <div class="sub"> |
| <a href="../../www/links.html">Links</a> |
| </div> |
| <div class="sep"></div>
|
| <div class="menu"> |
| <a href="../../www/sponsors.html">Sponsors:</a> |
| |
| <div class="sponsbox"> |
| <div class="sponsor"> |
| <a href="http://www.abi-stoff.de/abizeitung/" title="Abibuch">Abizeitung</a><!-- 20101101000200 --> |
| </div> |
| <div class="sponsor"> |
| <a href="http://www.deko.net">Deko.net</a><!-- 201101010600 Peterssen--> |
| </div> |
| <div class="sponsor"> |
| <a href="http://www.tomsgutscheine.de">Tom's Gutscheine</a><!-- 201005010360 invendio.de--> |
| </div> |
| <div class="sponsor"> |
| <a href="http://www.online-kredit-index.de">Kredit</a><!-- 201007010120 Buchhorn --> |
| </div> |
| <div class="sponsor"> |
| <a href="http://www.blumenversender.com">Blumenversand</a><!-- 201005010120 --> |
| </div> |
| <div class="sponsor"> |
| <a href="http://www.print24.de/">Druckerei</a><!-- 201009010720 --> |
| </div> |
| <div class="sponsor"> |
| <a href="http://www.goyax.de">Börse</a><!-- 201004010240 Gewiese digital-finance.de --> |
| </div> |
| <div class="sponsor"> |
| <a href="http://www.allesdruck.de">Druckerei Online</a><!-- 201012011200 allesdruck.de--> |
| </div> |
| </div> |
| </div> |
|
|
|
|
| </div>
|
|
|
| <div class="main">
|
|
|
| <p class="navigation-index">[<a href="#GetImageChannelFeatures">GetImageChannelFeatures</a>]</p> |
| |
| <h2><a href="http://www.imagemagick.org/api/MagickCore/feature |
| _8c.html" target="source" name="GetImageChannelFeatures">GetImageChannelFeatures</a></h2> |
| <div class="doc-section"> |
| |
| <p>GetImageChannelFeatures() returns features for each channel in the image in each of four directions (horizontal, vertical, left and right diagonals) for the specified distance. The features include the angular second moment, contrast, correlation, sum of squares: variance, inverse difference moment, sum average, sum varience, sum entropy, entropy, difference variance, difference entropy, information measures of correlation 1, information measures of correlation 2, and maximum correlation coefficient. You can access the red channel contrast, for example, like this:</p> |
| |
| <pre class="text"> |
| channel_features=GetImageChannelFeatures(image,1,excepton); |
| contrast=channel_features[RedChannel].contrast[0]; |
| </pre> |
| |
| <p>Use MagickRelinquishMemory() to free the features buffer.</p></ol> |
| |
| <p>The format of the GetImageChannelFeatures method is:</p> |
| |
| <pre class="code"> |
| ChannelFeatures *GetImageChannelFeatures(const Image *image, |
| const unsigned long distance,ExceptionInfo *exception) |
| </pre> |
| |
| <p>A description of each parameter follows:</p></ol> |
| |
| <h5>image</h5> |
| <ol><p>the image.</p></ol> |
| |
| <h5>distance</h5> |
| <ol><p>the distance.</p></ol> |
| |
| <h5>exception</h5> |
| <ol><p>return any errors or warnings in this structure.</p></ol> |
| |
| </div> |
|
|
| </div>
|
|
|
| <div id="linkbar">
|
| <!-- <span id="linkbar-west"> </span> -->
|
| <span id="linkbar-center">
|
| <a href="http://www.imagemagick.org/discourse-server/">Discourse Server</a> •
|
| <a href="http://studio.webbyland.com/ImageMagick/MagickStudio/scripts/MagickStudio.cgi">Studio</a>
|
| </span>
|
| <span id="linkbar-east"> </span>
|
| </div>
|
| <div class="footer">
|
| <span id="footer-west">© 1999-2010 ImageMagick Studio LLC</span>
|
| <span id="footer-east"> <a href="../http://www.imagemagick.org/script/contact.php">Contact the Wizards</a></span>
|
| </div>
|
| <div style="clear: both; margin: 0; width: 100%; "></div>
|
| </body>
|
| </html>
|