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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html> <head> <title>Selects a threshold for each pixel based on a range of intensity</title> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> </head> <body><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.imagick-adaptivesharpenimage.html">Imagick::adaptiveSharpenImage</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.imagick-addimage.html">Imagick::addImage</a></div> <div class="up"><a href="class.imagick.html">The Imagick class</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div><hr /><div id="function.imagick-adaptivethresholdimage" class="refentry"> <div class="refnamediv"> <h1 class="refname">Imagick::adaptiveThresholdImage</h1> <p class="verinfo">(No version information available, might be only in CVS)</p><p class="refpurpose"><span class="refname">Imagick::adaptiveThresholdImage</span> — <span class="dc-title">Selects a threshold for each pixel based on a range of intensity</span></p> </div> <div class="refsect1 description"> <h3 class="title">Description</h3> <div class="methodsynopsis dc-description"> <span class="type">bool</span> <span class="methodname"><b><b>Imagick::adaptiveThresholdImage</b></b></span> ( <span class="methodparam"><span class="type">int</span> <tt class="parameter">$width</tt></span> , <span class="methodparam"><span class="type">int</span> <tt class="parameter">$height</tt></span> , <span class="methodparam"><span class="type">int</span> <tt class="parameter">$offset</tt></span> )</div> <p class="para rdfs-comment"> Selects an individual threshold for each pixel based on the range of intensity values in its local neighborhood. This allows for thresholding of an image whose global intensity histogram doesn't contain distinctive peaks. </p> </div> <div class="refsect1 parameters"> <h3 class="title">Parameters</h3> <p class="para"> <dl> <dt> <span class="term"><i><tt class="parameter">width</tt></i></span> <dd> <p class="para"> Width of the local neighborhood. </p> </dd> </dt> <dt> <span class="term"><i><tt class="parameter">height</tt></i></span> <dd> <p class="para"> Height of the local neighborhood. </p> </dd> </dt> <dt> <span class="term"><i><tt class="parameter">offset</tt></i></span> <dd> <p class="para"> The mean offset </p> </dd> </dt> </dl> </p> </div> <div class="refsect1 returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> Returns <b><tt>TRUE</tt></b> on success. </p> </div></div><hr /><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.imagick-adaptivesharpenimage.html">Imagick::adaptiveSharpenImage</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.imagick-addimage.html">Imagick::addImage</a></div> <div class="up"><a href="class.imagick.html">The Imagick class</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div></body></html>⌨️ 快捷键说明
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