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55<p class="text-center"><a href="signature.php#SignatureImage">SignatureImage</a></p>
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57<h2><a href="http://nextgen.imagemagick.org/api/MagickCore/signature_8c.html" id="SignatureImage">SignatureImage</a></h2>
58
59<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>
60
61<p>The format of the SignatureImage method is:</p>
62
63<pre class="text">
64MagickBooleanType SignatureImage(Image *image,ExceptionInfo *exception)
65</pre>
66
67<p>A description of each parameter follows:</p>
68
69<dd>
70</dd>
71
72<dd> </dd>
73<dl class="dl-horizontal">
74<dt>image</dt>
75<dd>the image. </dd>
76
77<dd> </dd>
78<dt>exception</dt>
79<dd>return any errors or warnings in this structure. </dd>
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