1 2 3 4 5 <!DOCTYPE html> 6 <html lang="en"> 7 <head> 8 <title>ImageMagick: MagickCore, C API for ImageMagick: Count the Colors in an Image</title> 9 <meta charset="utf-8" /> 10 <meta http-equiv="X-UA-Compatible" content="IE=edge" /> 11 <meta name="viewport" content="width=device-width, initial-scale=1" /> 12 <meta http-equiv="content-type" content="text/html; charset=utf-8"/> 13 <meta name="application-name" content="ImageMagick"/> 14 <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 Bzier curves."/> 15 <meta name="application-url" content="http://www.imagemagick.org"/> 16 <meta name="generator" content="PHP"/> 17 <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"/> 18 <meta name="rating" content="GENERAL"/> 19 <meta name="robots" content="INDEX, FOLLOW"/> 20 <meta name="generator" content="ImageMagick Studio LLC"/> 21 <meta name="author" content="ImageMagick Studio LLC"/> 22 <meta name="revisit-after" content="2 DAYS"/> 23 <meta name="resource-type" content="document"/> 24 <meta name="copyright" content="Copyright (c) 1999-2016 ImageMagick Studio LLC"/> 25 <meta name="distribution" content="Global"/> 26 <meta name="magick-serial" content="P131-S030410-R485315270133-P82224-A6668-G1245-1"/> 27 <meta name="google-site-verification" content="_bMOCDpkx9ZAzBwb2kF3PRHbfUUdFj2uO8Jd1AXArz4" /> 28 <link rel="icon" href="../images/wand.png"/> 29 <link rel="shortcut icon" href="../images/wand.ico"/> 30 <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"> 31 <link rel="stylesheet" href="../css/magick.html"/> 32 </head> 33 <body> 34 <div class="main"> 35 <div class="magick-masthead"> 36 <div class="container"> 37 <script async="async" src="http://localhost/pagead/js/adsbygoogle.js"></script> <ins class="adsbygoogle" 38 style="display:block" 39 data-ad-client="ca-pub-3129977114552745" 40 data-ad-slot="6345125851" 41 data-ad-format="auto"></ins> 42 <script> 43 (adsbygoogle = window.adsbygoogle || []).push({}); 44 </script> 45 <nav class="magick-nav"> 46 <a class="magick-nav-item " href="../index.html">Home</a> 47 <a class="magick-nav-item " href="../binary-releases.html">Download</a> 48 <a class="magick-nav-item " href="../command-line-tools.html">Tools</a> 49 <a class="magick-nav-item " href="../command-line-processing.html">Command-line</a> 50 <a class="magick-nav-item " href="../resources.html">Resources</a> 51 <a class="magick-nav-item " href="api.html">Develop</a> 52 <a class="magick-nav-item " href="http://www.imagemagick.org/script/search.php">Search</a> 53 <a class="magick-nav-item pull-right" href="https://www.imagemagick.org/discourse-server/">Community</a> 54 </nav> 55 </div> 56 </div> 57 <div class="container"> 58 <div class="magick-header"> 59 <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> 60 61 <h2><a href="http://www.imagemagick.org/api/MagickCore/color_8c.html" id="AcquireColorCache">AcquireColorCache</a></h2> 62 63 <p>AcquireColorCache() caches one or more color configurations which provides a mapping between color attributes and a color name.</p> 64 65 <p>The format of the AcquireColorCache method is:</p> 66 67 <pre class="text"> 68 LinkedListInfo *AcquireColorCache(const char *filename, 69 ExceptionInfo *exception) 70 </pre> 71 72 <p>A description of each parameter follows:</p> 73 74 <dd> 75 </dd> 76 77 <dd> </dd> 78 <dl class="dl-horizontal"> 79 <dt>filename</dt> 80 <dd>the font file name. </dd> 81 82 <dd> </dd> 83 <dt>exception</dt> 84 <dd>return any errors or warnings in this structure. </dd> 85 86 <dd> </dd> 87 </dl> 88 <h2><a href="http://www.imagemagick.org/api/MagickCore/color_8c.html" id="GetColorInfoList">GetColorInfoList</a></h2> 89 90 <p>GetColorInfoList() returns any colors that match the specified pattern.</p> 91 92 <p>The format of the GetColorInfoList function is:</p> 93 94 <pre class="text"> 95 const ColorInfo **GetColorInfoList(const char *pattern, 96 size_t *number_colors,ExceptionInfo *exception) 97 </pre> 98 99 <p>A description of each parameter follows:</p> 100 101 <dd> 102 </dd> 103 104 <dd> </dd> 105 <dl class="dl-horizontal"> 106 <dt>pattern</dt> 107 <dd>Specifies a pointer to a text string containing a pattern. </dd> 108 109 <dd> </dd> 110 <dt>number_colors</dt> 111 <dd> This integer returns the number of colors in the list. </dd> 112 113 <dd> </dd> 114 <dt>exception</dt> 115 <dd>return any errors or warnings in this structure. </dd> 116 117 <dd> </dd> 118 </dl> 119 <h2><a href="http://www.imagemagick.org/api/MagickCore/color_8c.html" id="GetColorList">GetColorList</a></h2> 120 121 <p>GetColorList() returns any colors that match the specified pattern.</p> 122 123 <p>The format of the GetColorList function is:</p> 124 125 <pre class="text"> 126 char **GetColorList(const char *pattern,size_t *number_colors, 127 ExceptionInfo *exception) 128 </pre> 129 130 <p>A description of each parameter follows:</p> 131 132 <dd> 133 </dd> 134 135 <dd> </dd> 136 <dl class="dl-horizontal"> 137 <dt>pattern</dt> 138 <dd>Specifies a pointer to a text string containing a pattern. </dd> 139 140 <dd> </dd> 141 <dt>number_colors</dt> 142 <dd> This integer returns the number of colors in the list. </dd> 143 144 <dd> </dd> 145 <dt>exception</dt> 146 <dd>return any errors or warnings in this structure. </dd> 147 148 <dd> </dd> 149 </dl> 150 <h2><a href="http://www.imagemagick.org/api/MagickCore/color_8c.html" id="ListColorInfo">ListColorInfo</a></h2> 151 152 <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> 153 154 <p>The format of the ListColorInfo method is:</p> 155 156 <pre class="text"> 157 MagickBooleanType ListColorInfo(FILE *file,ExceptionInfo *exception) 158 </pre> 159 160 <p>A description of each parameter follows.</p> 161 162 <dt>file</dt> 163 <p>List color names to this file handle.</p> 164 165 <dt>exception</dt> 166 <p>return any errors or warnings in this structure.</p> 167 168 <h2><a href="http://www.imagemagick.org/api/MagickCore/color_8c.html" id="QueryColorname">QueryColorname</a></h2> 169 170 <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> 171 172 <p>UPDATE: the 'image' argument is no longer needed as all information should have been preset using GetPixelInfo().</p> 173 174 <p>The format of the QueryColorname method is:</p> 175 176 <pre class="text"> 177 MagickBooleanType QueryColorname(const Image *image, 178 const PixelInfo *color,const ComplianceType compliance,char *name, 179 ExceptionInfo *exception) 180 </pre> 181 182 <p>A description of each parameter follows.</p> 183 184 <dt>image</dt> 185 <p>the image. (not used! - color gets settings from GetPixelInfo()</p> 186 187 <dt>color</dt> 188 <p>the color intensities.</p> 189 190 <dt>Compliance</dt> 191 <p>Adhere to this color standard: SVG, X11, or XPM.</p> 192 193 <dt>name</dt> 194 <p>Return the color name or hex value.</p> 195 196 <dt>exception</dt> 197 <p>return any errors or warnings in this structure.</p> 198 199 </div> 200 <footer class="magick-footer"> 201 <p><a href="../support.html">Donate</a> 202 <a href="../sitemap.html">Sitemap</a> 203 <a href="../links.html">Related</a> 204 <a href="../architecture.html">Architecture</a> 205 </p> 206 <p><a href="color.html#">Back to top</a> 207 <a href="http://pgp.mit.edu:11371/pks/lookup?op=get&search=0x89AB63D48277377A">Public Key</a> 208 <a href="http://www.imagemagick.org/script/contact.php">Contact Us</a></p> 209 <p><small> 1999-2016 ImageMagick Studio LLC</small></p> 210 </footer> 211 </div><!-- /.container --> 212 213 <script src="https://localhost/ajax/libs/jquery/1.11.3/jquery.min.js"></script> 214 <script src="../js/magick.html"></script> 215 </div> 216 </body> 217 </html> 218