<!DOCTYPE html>
<html lang="en">
<head>
<title>ImageMagick: MagickCore, C API for ImageMagick: Count the Colors in an Image</title>
<meta charset="utf-8" />
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
<meta name="viewport" content="width=device-width, initial-scale=1" />
<meta http-equiv="content-type" content="text/html; charset=utf-8"/>
<meta name="application-name" content="ImageMagick"/>
<meta name="description" content="ImageMagick® is a software suite to create, edit, compose, or convert bitmap images. It can read and write images in a variety of formats (over 200) including PNG, JPEG, JPEG-2000, GIF, WebP, Postscript, PDF, and SVG. Use ImageMagick to resize, flip, mirror, rotate, distort, shear and transform images, adjust image colors, apply various special effects, or draw text, lines, polygons, ellipses and Bézier curves."/>
<meta name="application-url" content="http://www.imagemagick.org"/>
<meta name="generator" content="PHP"/>
<meta name="keywords" content="magickcore, c, api, for, imagemagick:, count, the, colors, in, an, image, ImageMagick, PerlMagick, image processing, image, photo, software, Magick++, OpenMP, convert"/>
<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) 1999-2016 ImageMagick Studio LLC"/>
<meta name="distribution" content="Global"/>
<meta name="magick-serial" content="P131-S030410-R485315270133-P82224-A6668-G1245-1"/>
<meta name="google-site-verification" content="_bMOCDpkx9ZAzBwb2kF3PRHbfUUdFj2uO8Jd1AXArz4" />
<link rel="icon" href="../images/wand.png"/>
<link rel="shortcut icon" href="../images/wand.ico"/>
<link rel="stylesheet" type="text/css" href="http://fonts.googleapis.com/css?family=Roboto:900,400,400italic,700,700italic,300,300italic|Open+Sans:300italic,400italic,700italic,300,400,600,700">
<link rel="stylesheet" href="../css/magick.html"/>
</head>
<body>
<div class="main">
<div class="magick-masthead">
<div class="container">
<script async="async" src="http://localhost/pagead/js/adsbygoogle.js"></script> <ins class="adsbygoogle"
style="display:block"
data-ad-client="ca-pub-3129977114552745"
data-ad-slot="6345125851"
data-ad-format="auto"></ins>
<script>
(adsbygoogle = window.adsbygoogle || []).push({});
</script>
<nav class="magick-nav">
<a class="magick-nav-item " href="../index.html">Home</a>
<a class="magick-nav-item " href="../binary-releases.html">Download</a>
<a class="magick-nav-item " href="../command-line-tools.html">Tools</a>
<a class="magick-nav-item " href="../command-line-processing.html">Command-line</a>
<a class="magick-nav-item " href="../resources.html">Resources</a>
<a class="magick-nav-item " href="api.html">Develop</a>
<a class="magick-nav-item " href="http://www.imagemagick.org/script/search.php">Search</a>
<a class="magick-nav-item pull-right" href="https://www.imagemagick.org/discourse-server/">Community</a>
</nav>
</div>
</div>
<div class="container">
<div class="magick-header">
<p class="text-center"><a href="color.html#AcquireColorCache">AcquireColorCache</a> • <a href="color.html#GetColorInfoList">GetColorInfoList</a> • <a href="color.html#GetColorList">GetColorList</a> • <a href="color.html#ListColorInfo">ListColorInfo</a> • <a href="color.html#QueryColorname">QueryColorname</a></p>
<h2><a href="http://www.imagemagick.org/api/MagickCore/color_8c.html" id="AcquireColorCache">AcquireColorCache</a></h2>
<p>AcquireColorCache() caches one or more color configurations which provides a mapping between color attributes and a color name.</p>
<p>The format of the AcquireColorCache method is:</p>
<pre class="text">
LinkedListInfo *AcquireColorCache(const char *filename,
ExceptionInfo *exception)
</pre>
<p>A description of each parameter follows:</p>
<dd>
</dd>
<dd> </dd>
<dl class="dl-horizontal">
<dt>filename</dt>
<dd>the font file name. </dd>
<dd> </dd>
<dt>exception</dt>
<dd>return any errors or warnings in this structure. </dd>
<dd> </dd>
</dl>
<h2><a href="http://www.imagemagick.org/api/MagickCore/color_8c.html" id="GetColorInfoList">GetColorInfoList</a></h2>
<p>GetColorInfoList() returns any colors that match the specified pattern.</p>
<p>The format of the GetColorInfoList function is:</p>
<pre class="text">
const ColorInfo **GetColorInfoList(const char *pattern,
size_t *number_colors,ExceptionInfo *exception)
</pre>
<p>A description of each parameter follows:</p>
<dd>
</dd>
<dd> </dd>
<dl class="dl-horizontal">
<dt>pattern</dt>
<dd>Specifies a pointer to a text string containing a pattern. </dd>
<dd> </dd>
<dt>number_colors</dt>
<dd> This integer returns the number of colors in the list. </dd>
<dd> </dd>
<dt>exception</dt>
<dd>return any errors or warnings in this structure. </dd>
<dd> </dd>
</dl>
<h2><a href="http://www.imagemagick.org/api/MagickCore/color_8c.html" id="GetColorList">GetColorList</a></h2>
<p>GetColorList() returns any colors that match the specified pattern.</p>
<p>The format of the GetColorList function is:</p>
<pre class="text">
char **GetColorList(const char *pattern,size_t *number_colors,
ExceptionInfo *exception)
</pre>
<p>A description of each parameter follows:</p>
<dd>
</dd>
<dd> </dd>
<dl class="dl-horizontal">
<dt>pattern</dt>
<dd>Specifies a pointer to a text string containing a pattern. </dd>
<dd> </dd>
<dt>number_colors</dt>
<dd> This integer returns the number of colors in the list. </dd>
<dd> </dd>
<dt>exception</dt>
<dd>return any errors or warnings in this structure. </dd>
<dd> </dd>
</dl>
<h2><a href="http://www.imagemagick.org/api/MagickCore/color_8c.html" id="ListColorInfo">ListColorInfo</a></h2>
<p>ListColorInfo() lists color names to the specified file. Color names are a convenience. Rather than defining a color by its red, green, and blue intensities just use a color name such as white, blue, or yellow.</p>
<p>The format of the ListColorInfo method is:</p>
<pre class="text">
MagickBooleanType ListColorInfo(FILE *file,ExceptionInfo *exception)
</pre>
<p>A description of each parameter follows.</p>
<dt>file</dt>
<p>List color names to this file handle.</p>
<dt>exception</dt>
<p>return any errors or warnings in this structure.</p>
<h2><a href="http://www.imagemagick.org/api/MagickCore/color_8c.html" id="QueryColorname">QueryColorname</a></h2>
<p>QueryColorname() returns a named color for the given color intensity. If an exact match is not found, a hex value is returned instead. For example an intensity of rgb:(0,0,0) returns black whereas rgb:(223,223,223) returns #dfdfdf.</p>
<p>UPDATE: the 'image' argument is no longer needed as all information should have been preset using GetPixelInfo().</p>
<p>The format of the QueryColorname method is:</p>
<pre class="text">
MagickBooleanType QueryColorname(const Image *image,
const PixelInfo *color,const ComplianceType compliance,char *name,
ExceptionInfo *exception)
</pre>
<p>A description of each parameter follows.</p>
<dt>image</dt>
<p>the image. (not used! - color gets settings from GetPixelInfo()</p>
<dt>color</dt>
<p>the color intensities.</p>
<dt>Compliance</dt>
<p>Adhere to this color standard: SVG, X11, or XPM.</p>
<dt>name</dt>
<p>Return the color name or hex value.</p>
<dt>exception</dt>
<p>return any errors or warnings in this structure.</p>
</div>
<footer class="magick-footer">
<p><a href="../support.html">Donate</a> •
<a href="../sitemap.html">Sitemap</a> •
<a href="../links.html">Related</a> •
<a href="../architecture.html">Architecture</a>
</p>
<p><a href="color.html#">Back to top</a> •
<a href="http://pgp.mit.edu:11371/pks/lookup?op=get&search=0x89AB63D48277377A">Public Key</a> •
<a href="http://www.imagemagick.org/script/contact.php">Contact Us</a></p>
<p><small>© 1999-2016 ImageMagick Studio LLC</small></p>
</footer>
</div><!-- /.container -->
<script src="https://localhost/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
<script src="../js/magick.html"></script>
</div>
</body>
</html>