<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <title>Returns the difference in one or more images</title> </head> <body><div class="manualnavbar" style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="imagick.commentimage.html">Imagick::commentImage</a></div> <div class="next" style="text-align: right; float: right;"><a href="imagick.compareimagelayers.html">Imagick::compareImageLayers</a></div> <div class="up"><a href="class.imagick.html">Imagick</a></div> <div class="home"><a href="index.html">PHP Manual</a></div> </div><hr /><div id="imagick.compareimagechannels" class="refentry"> <div class="refnamediv"> <h1 class="refname">Imagick::compareImageChannels</h1> <p class="verinfo">(PECL imagick 2.0.0)</p><p class="refpurpose"><span class="refname">Imagick::compareImageChannels</span> — <span class="dc-title">Returns the difference in one or more images</span></p> </div> <div class="refsect1 description" id="refsect1-imagick.compareimagechannels-description"> <h3 class="title">Description</h3> <div class="methodsynopsis dc-description"> <span class="type">array</span> <span class="methodname"><strong>Imagick::compareImageChannels</strong></span> ( <span class="methodparam"><span class="type"><a href="class.imagick.html" class="type Imagick">Imagick</a></span> <code class="parameter">$image</code></span> , <span class="methodparam"><span class="type">int</span> <code class="parameter">$channelType</code></span> , <span class="methodparam"><span class="type">int</span> <code class="parameter">$metricType</code></span> )</div> <p class="para rdfs-comment"> Compares one or more images and returns the difference image. </p> </div> <div class="refsect1 parameters" id="refsect1-imagick.compareimagechannels-parameters"> <h3 class="title">Parameters</h3> <p class="para"> <dl> <dt> <span class="term"><em><code class="parameter">image</code></em></span> <dd> <p class="para"> Imagick object containing the image to compare. </p> </dd> </dt> <dt> <span class="term"><em><code class="parameter">channelType</code></em></span> <dd> <p class="para"> Provide any channel constant that is valid for your channel mode. To apply to more than one channel, combine channeltype constants using bitwise operators. Refer to this list of <a href="imagick.constants.html#imagick.constants.channel" class="link">channel constants</a>. </p> </dd> </dt> <dt> <span class="term"><em><code class="parameter">metricType</code></em></span> <dd> <p class="para"> One of the <a href="imagick.constants.html#imagick.constants.metric" class="link">metric type constants</a>. </p> </dd> </dt> </dl> </p> </div> <div class="refsect1 returnvalues" id="refsect1-imagick.compareimagechannels-returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> Array consisting of <em>new_wand</em> and <em>distortion</em>. </p> </div> <div class="refsect1 errors" id="refsect1-imagick.compareimagechannels-errors"> <h3 class="title">Errors/Exceptions</h3> <p class="para"> Throws ImagickException on error. </p> </div> </div><hr /><div class="manualnavbar" style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="imagick.commentimage.html">Imagick::commentImage</a></div> <div class="next" style="text-align: right; float: right;"><a href="imagick.compareimagelayers.html">Imagick::compareImageLayers</a></div> <div class="up"><a href="class.imagick.html">Imagick</a></div> <div class="home"><a href="index.html">PHP Manual</a></div> </div></body></html>