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     <title>ImageMagick: MagickCore, C API for ImageMagick: Count the Colors in an Image</title>
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 <p class="text-center"><a href="color.html#AcquireColorCache">AcquireColorCache</a> &#8226; <a href="color.html#GetColorInfoList">GetColorInfoList</a> &#8226; <a href="color.html#GetColorList">GetColorList</a> &#8226; <a href="color.html#ListColorInfo">ListColorInfo</a> &#8226; <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>

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	<!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" />
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	<link rel="shortcut icon" href="../images/wand.ico"/>
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	<script async="async" src="http://localhost/pagead/js/adsbygoogle.js"></script> <ins class="adsbygoogle"
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	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>
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	<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>
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	</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>
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	</p>
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	<a href="http://www.imagemagick.org/script/contact.php">Contact Us</a></p>
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