<?xml version="1.0" encoding="utf-8" ?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <meta name="generator" content="Docutils 0.13.1: http://docutils.sourceforge.net/" /> <title>average</title> <link rel="stylesheet" href="../docutils-api.css" type="text/css" /> </head> <body> <div class="banner"> <img src="../images/gm-107x76.png" alt="GraphicMagick logo" width="107" height="76" /> <span class="title">GraphicsMagick</span> <form action="http://www.google.com/search"> <input type="hidden" name="domains" value="www.graphicsmagick.org" /> <input type="hidden" name="sitesearch" value="www.graphicsmagick.org" /> <span class="nowrap"><input type="text" name="q" size="25" maxlength="255" /> <input type="submit" name="sa" value="Search" /></span> </form> </div> <div class="navmenu"> <ul> <li><a href="../index.html">Home</a></li> <li><a href="../project.html">Project</a></li> <li><a href="../download.html">Download</a></li> <li><a href="../README.html">Install</a></li> <li><a href="../Hg.html">Source</a></li> <li><a href="../NEWS.html">News</a> </li> <li><a href="../utilities.html">Utilities</a></li> <li><a href="../programming.html">Programming</a></li> <li><a href="../reference.html">Reference</a></li> </ul> </div> <div class="document" id="average"> <h1 class="title">average</h1> <h2 class="subtitle" id="image-averaging-functions">Image averaging functions</h2> <div class="contents topic" id="contents"> <p class="topic-title first">Contents</p> <ul class="simple"> <li><a class="reference internal" href="#averageimages" id="id1">AverageImages</a></li> </ul> </div> <div class="section" id="averageimages"> <h1><a class="toc-backref" href="#id1">AverageImages</a></h1> <div class="section" id="synopsis"> <h2>Synopsis</h2> <pre class="literal-block"> <a class="reference external" href="../api/types.html#image">Image</a> *AverageImages( <a class="reference external" href="../api/types.html#image">Image</a> *image, <a class="reference external" href="../api/types.html#exceptioninfo">ExceptionInfo</a> *exception ); </pre> </div> <div class="section" id="description"> <h2>Description</h2> <p>The Average() method takes a set of images and averages them together. Each image in the set must have the same width and height. Average() returns a single image with each corresponding pixel component of each image averaged. On failure, a NULL image is returned and exception describes the reason for the failure.</p> <p>The format of the AverageImage method is:</p> <pre class="literal-block"> <a class="reference external" href="../api/types.html#image">Image</a> *AverageImages( <a class="reference external" href="../api/types.html#image">Image</a> *image, <a class="reference external" href="../api/types.html#exceptioninfo">ExceptionInfo</a> *exception ); </pre> <p>A description of each parameter follows:</p> <dl class="docutils"> <dt>image:</dt> <dd>The image sequence.</dd> <dt>exception:</dt> <dd>Return any errors or warnings in this structure.</dd> </dl> </div> </div> </div> </body> </html>