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-<h1>Module feature
- Methods</h1>
+<h1>Module feature Methods</h1>
<p class="navigation-index">[<a href="#GetImageChannelFeatures">GetImageChannelFeatures</a>]</p>
-<h2><a href="http://www.imagemagick.org/api/MagickCore/feature
-_8c.html" id="GetImageChannelFeatures">GetImageChannelFeatures</a></h2>
+<h2><a href="http://www.imagemagick.org/api/MagickCore/feature_8c.html" id="GetImageChannelFeatures">GetImageChannelFeatures</a></h2>
<div class="doc-section">
<p>GetImageChannelFeatures() returns features for each channel in the image in each of four directions (horizontal, vertical, left and right diagonals) for the specified distance. The features include the angular second moment, contrast, correlation, sum of squares: variance, inverse difference moment, sum average, sum varience, sum entropy, entropy, difference variance, difference entropy, information measures of correlation 1, information measures of correlation 2, and maximum correlation coefficient. You can access the red channel contrast, for example, like this:</p>
projects / imagemagick / blobdiff