1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
|
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no" />
<title>ImageMagick - MagickCore, C API: Compute a Message Digest for an Image</title>
<meta name="application-name" content="ImageMagick" />
<meta name="description" content="Use ImageMagick® to create, edit, compose, and convert bitmap images. Resize an image, crop it, change its shades and colors, add captions, and more." />
<meta name="application-url" content="https://imagemagick.org" />
<meta name="generator" content="PHP" />
<meta name="keywords" content="magickcore, c, api:, compute, a, message, digest, for, an, image, image converter, image resizer, image editor, photo editor, jpg converter, png converter, tiff converter, vector images, online, free, swiss army" />
<meta name="rating" content="GENERAL" />
<meta name="robots" content="INDEX, FOLLOW" />
<meta name="generator" content="ImageMagick Studio LLC" />
<meta name="author" content="ImageMagick Studio LLC" />
<meta name="revisit-after" content="2 DAYS" />
<meta name="resource-type" content="document" />
<meta name="copyright" content="Copyright (c) 1999-2020 ImageMagick Studio LLC" />
<meta name="distribution" content="Global" />
<meta name="magick-serial" content="P131-S030410-R485315270133-P82224-A6668-G1245-1" />
<meta property='og:url' content='../../' />
<meta property='og:title' content='ImageMagick' />
<meta property='og:image' content='../../../images/logo.png' />
<meta property='og:type' content='website' />
<meta property='og:site_name' content='ImageMagick' />
<meta property='og:description' content="Create, Edit, Compose, or Convert Bitmap Images" />
<meta name="google-site-verification" content="_bMOCDpkx9ZAzBwb2kF3PRHbfUUdFj2uO8Jd1AXArz4" />
<link href="signature.html" rel="canonical" />
<link href="../../images/wand.png" rel="icon" />
<link href="../../images/wand.ico" rel="shortcut icon" />
<link href="../assets/magick.css" rel="stylesheet" />
</head>
<body>
<nav class="navbar navbar-expand-md navbar-dark fixed-top bg-dark">
<a class="navbar-brand" href="../index.html"><img class="d-block" id="icon" alt="ImageMagick" width="32" height="32" src="../../images/wand.ico"/></a>
<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarsMagick" aria-controls="navbarsMagick" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<div class="navbar-collapse collapse" id="navbarsMagick" style="">
<ul class="navbar-nav mr-auto">
<li class="nav-item ">
<a class="nav-link" href="../index.html">Home <span class="sr-only">(current)</span></a>
</li>
<li class="nav-item ">
<a class="nav-link" href="../www/download.html">Download</a>
</li>
<li class="nav-item ">
<a class="nav-link" href="../www/command-line-tools.html">Tools</a>
</li>
<li class="nav-item ">
<a class="nav-link" href="../www/command-line-processing.html">Command-line</a>
</li>
<li class="nav-item ">
<a class="nav-link" href="../www/develop.html">Develop</a>
</li>
<li class="nav-item">
<a class="nav-link" target="_blank" href="https://github.com/ImageMagick/ImageMagick/discussions">Community</a>
</li>
<li class="nav-item">
</li>
<li class="nav-item">
<iframe src="https://github.com/sponsors/ImageMagick/button" title="Sponsor ImageMagick" height="35" width="107" style="border: 0;"></iframe>
</li>
</ul>
</div>
<form class="form-inline my-2 my-md-0" action="https://imagemagick.org/script/search.php">
<input class="form-control mr-sm-2" type="text" name="q" placeholder="Search" aria-label="Search">
<button class="btn btn-outline-success my-2 my-sm-0" type="submit" name="sa">Search</button>
</form>
</nav>
<div class="container">
<script async="async" src="https://localhost/pagead/js/adsbygoogle.js"></script> <ins class="adsbygoogle"
style="display:block"
data-ad-client="ca-pub-3129977114552745"
data-ad-slot="6345125851"
data-full-width-responsive="true"
data-ad-format="horizontal"></ins>
<script>
(adsbygoogle = window.adsbygoogle || []).push({});
</script>
</div>
<main role="main" class="container">
<div class="magick-template">
<div class="magick-header">
<p class="text-center"><a href="signature.html#SignatureImage">SignatureImage</a></p>
<h2><a href="../../api/MagickCore/signature_8c.html" id="SignatureImage">SignatureImage</a></h2>
<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>
<p>The format of the SignatureImage method is:</p>
<pre class="text">
MagickBooleanType SignatureImage(Image *image,ExceptionInfo *exception)
</pre>
<p>A description of each parameter follows:</p>
<dd>
</dd>
<dd> </dd>
<dl class="dl-horizontal">
<dt>image</dt>
<dd>the image. </dd>
<dd> </dd>
<dt>exception</dt>
<dd>return any errors or warnings in this structure. </dd>
<dd> </dd>
</dl>
</div>
</div>
</main><!-- /.container -->
<footer class="magick-footer">
<div class="container">
<p><a href="../www/security-policy.html">Security</a> •
<a href="../www/news.html">News</a>
<a href="signature.html#"><img class="d-inline" id="wand" alt="And Now a Touch of Magick" width="16" height="16" src="../../images/wand.ico"/></a>
<a href="../www/links.html">Related</a> •
<a href="../www/sitemap.html">Sitemap</a>
<br/>
<a href="../www/support.html">Sponsor</a> •
<a href="../www/cite.html">Cite</a> •
<a href="http://pgp.mit.edu/pks/lookup?op=get&search=0x89AB63D48277377A">Public Key</a> •
<a href="../www/contact.html">Contact Us</a>
<br/>
<a href="https://github.com/imagemagick/imagemagick" target="_blank" rel="noopener" aria-label="GitHub"><svg xmlns="http://www.w3.org/2000/svg" class="navbar-nav-svg" viewBox="0 0 512 499.36" width="2%" height="2%" role="img" focusable="false"><title>GitHub</title><path fill="currentColor" fill-rule="evenodd" d="M256 0C114.64 0 0 114.61 0 256c0 113.09 73.34 209 175.08 242.9 12.8 2.35 17.47-5.56 17.47-12.34 0-6.08-.22-22.18-.35-43.54-71.2 15.49-86.2-34.34-86.2-34.34-11.64-29.57-28.42-37.45-28.42-37.45-23.27-15.84 1.73-15.55 1.73-15.55 25.69 1.81 39.21 26.38 39.21 26.38 22.84 39.12 59.92 27.82 74.5 21.27 2.33-16.54 8.94-27.82 16.25-34.22-56.84-6.43-116.6-28.43-116.6-126.49 0-27.95 10-50.8 26.35-68.69-2.63-6.48-11.42-32.5 2.51-67.75 0 0 21.49-6.88 70.4 26.24a242.65 242.65 0 0 1 128.18 0c48.87-33.13 70.33-26.24 70.33-26.24 14 35.25 5.18 61.27 2.55 67.75 16.41 17.9 26.31 40.75 26.31 68.69 0 98.35-59.85 120-116.88 126.32 9.19 7.9 17.38 23.53 17.38 47.41 0 34.22-.31 61.83-.31 70.23 0 6.85 4.61 14.81 17.6 12.31C438.72 464.97 512 369.08 512 256.02 512 114.62 397.37 0 256 0z"/></svg></a> •
<a href="https://twitter.com/imagemagick" target="_blank" rel="noopener" aria-label="Twitter"><svg xmlns="http://www.w3.org/2000/svg" class="navbar-nav-svg" viewBox="0 0 512 416.32" width="2%" height="2%" role="img" focusable="false"><title>Twitter</title><path fill="currentColor" d="M160.83 416.32c193.2 0 298.92-160.22 298.92-298.92 0-4.51 0-9-.2-13.52A214 214 0 0 0 512 49.38a212.93 212.93 0 0 1-60.44 16.6 105.7 105.7 0 0 0 46.3-58.19 209 209 0 0 1-66.79 25.37 105.09 105.09 0 0 0-181.73 71.91 116.12 116.12 0 0 0 2.66 24c-87.28-4.3-164.73-46.3-216.56-109.82A105.48 105.48 0 0 0 68 159.6a106.27 106.27 0 0 1-47.53-13.11v1.43a105.28 105.28 0 0 0 84.21 103.06 105.67 105.67 0 0 1-47.33 1.84 105.06 105.06 0 0 0 98.14 72.94A210.72 210.72 0 0 1 25 370.84a202.17 202.17 0 0 1-25-1.43 298.85 298.85 0 0 0 160.83 46.92"/></svg></a>
<br/>
<small>© 1999-2021 ImageMagick Studio LLC</small></p>
<div>
</footer>
<!-- Javascript assets -->
<script>window.jQuery || document.write('<script src="../assets/jquery.slim.min.js"><\/script>')</script><script src="../assets/bootstrap.bundle.min.js" integrity="sha384-LtrjvnR4Twt/qOuYxE721u19sVFLVSA4hf/rRt6PrZTmiPltdZcI7q7PXQBYTKyf" crossorigin="anonymous">
</body>
</html>
|
