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cristy307ba182010-12-25 01:00:34 +0000[diff] [blame^]170<h1>Module signature
171 Methods</h1>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]172<p class="navigation-index">[<a href="#SignatureImage">SignatureImage</a>]</p>
173
174<h2><a href="http://www.imagemagick.org/api/MagickCore/signature
175_8c.html" target="source" name="SignatureImage">SignatureImage</a></h2>
176<div class="doc-section">
177
178<p>SignatureImage() computes a message digest from an image pixel stream with an implementation of the NIST SHA-256 Message Digest algorithm. This signature uniquely identifies the image and is convenient for determining if an image has been modified or whether two images are identical.</p></ol>
179
180<p>The format of the SignatureImage method is:</p>
181
182<pre class="code">
183 MagickBooleanType SignatureImage(Image *image)
184</pre>
185
186<p>A description of each parameter follows:</p></ol>
187
188<h5>image</h5>
189<ol><p>the image.</p></ol>
190
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