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
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
|
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
"http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html version="-//W3C//DTD XHTML 1.1//EN"
xmlns="http://www.w3.org/1999/xhtml" xml:lang="en"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.w3.org/1999/xhtml
http://www.w3.org/MarkUp/SCHEMA/xhtml11.xsd">
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8"/>
<meta name="google-site-verification" content="MxsMq6bdLOx0KSuz1MY6yG9ZTIJ7_7DVRfl5NCAT5Yg"/>
<title>ImageMagick: MagickCore, C API for ImageMagick: Compare an Image to a Reconstructed Image</title>
<meta http-equiv="content-language" content="en-US"/>
<meta http-equiv="content-type" content="text/html; charset=utf-8"/>
<meta http-equiv="reply-to" content="magick-users@imagemagick.org"/>
<meta name="application-name" content="ImageMagick"/>
<meta name="description" content="Use ImageMagick to convert, edit, or compose bitmap images in a variety of formats. In addition resize, rotate, shear, distort and transform images automagically."/>
<meta name="application-url" content="http://www.imagemagick.org"/>
<meta name="generator" content="PHP"/>
<meta name="keywords" content="magickcore, c, api, for, imagemagick:, compare, an, image, to, a, reconstructed, image, ImageMagick, PerlMagick, image processing, OpenMP, software development library, image, photo, software, Magick++, MagickWand"/>
<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) 1999-2012 ImageMagick Studio LLC"/>
<meta name="distribution" content="Global"/>
<link rel="icon" href="../../../../../../../../../../../../../../../../images/wand.png"/>
<link rel="shortcut icon" href="../../../../../../../../../../../../../../../../images/wand.ico" type="images/x-icon"/>
<link rel="canonical" href="http://www.imagemagick.org" />
<link rel="meta" type="application/rdf+xml" title="ICI" href="http://imagemagick.org/ici.rdf"/>
<!-- Add jQuery library -->
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.7/jquery.min.js"></script>
<!-- Optionaly include easing and/or mousewheel plugins -->
<script type="text/javascript" src="http://www.imagemagick.org/fancybox/jquery.easing-1.3.pack.js"></script>
<script type="text/javascript" src="http://www.imagemagick.org/fancybox/jquery.mousewheel-3.0.6.pack.js"></script>
<!-- Add fancyBox -->
<link rel="stylesheet" href="http://www.imagemagick.org/fancybox/jquery.fancybox.css?v=2.0.4" type="text/css" media="screen" />
<script type="text/javascript" src="http://www.imagemagick.org/fancybox/jquery.fancybox.pack.js?v=2.0.4"></script>
<!-- Optionaly include button and/or thumbnail helpers -->
<link rel="stylesheet" href="http://www.imagemagick.org/fancybox/helpers/jquery.fancybox-buttons.css?v=2.0.4" type="text/css" media="screen" />
<script type="text/javascript" src="http://www.imagemagick.org/fancybox/helpers/jquery.fancybox-buttons.js?v=2.0.4"></script>
<link rel="stylesheet" href="http://www.imagemagick.org/fancybox/helpers/jquery.fancybox-thumbs.css?v=2.0.4" type="text/css" media="screen" />
<script type="text/javascript" src="http://www.imagemagick.org/fancybox/helpers/jquery.fancybox-thumbs.js?v=2.0.4"></script>
<script type="text/javascript">
$(document).ready(function() {
$(".fancybox").fancybox();
});
</script>
<!-- ImageMagick style -->
<link rel="stylesheet" href="http://www.google.com/cse/style/look/default.css" type="text/css" />
<style type="text/css" media="all">
@import url("../../../../../../../../../../../../../../../../www/magick.css");
</style>
</head>
<body id="www-imagemagick-org">
<div class="titlebar">
<div style="margin: 17px auto; float: left;">
<script type="text/javascript">
<!--
google_ad_client = "pub-3129977114552745";
google_ad_slot = "5439289906";
google_ad_width = 728;
google_ad_height = 90;
//-->
</script>
<script type="text/javascript"
src="http://pagead2.googlesyndication.com/pagead/show_ads.js">
</script>
</div>
<a href="../../../../../../../../../../../../../../../../discourse-server">
<img src="../../../../../../../../../../../../../../../../images/logo.jpg"
alt="ImageMagick Logo"
style="width: 123px; height: 118px; border: 0px; float: right;" /></a>
<a href="../../../../../../../../../../../../../../../../index.html">
<img src="../../../../../../../../../../../../../../../../images/sprite.jpg"
alt="ImageMagick Sprite"
style="width: 114px; height: 118px; border: 0px; float: right;" /></a>
</div>
<div class="westbar">
<div class="menu">
<a title="About ImageMagick" href="../../../../../../../../../../../../../../../../index.html">About ImageMagick</a>
</div>
<div class="menu">
<a title="Binary Releases" href="../../../../../../../../../../../../../../../../www/binary-releases.html">Binary Releases</a>
</div>
<div class="sub">
<a title="Binary Release: Unix" href="../../../../../../../../../../../../../../../../www/binary-releases.html#unix">Unix</a>
</div>
<div class="sub">
<a title="Binary Release: MacOS X" href="../../../../../../../../../../../../../../../../www/binary-releases.html#macosx">Mac OS X</a>
</div>
<div class="sub">
<a title="Binary Release: iOS" href="../../../../../../../../../../../../../../../../www/binary-releases.html#iOS">iOS</a>
</div>
<div class="sub">
<a title="Binary Release: Windows" href="../../../../../../../../../../../../../../../../www/binary-releases.html#windows">Windows</a>
</div>
<div class="sep"></div>
<div class="menu">
<a title="Command-line Tools" href="../../../../../../../../../../../../../../../../www/command-line-tools.html">Command-line Tools</a>
</div>
<div class="sub">
<a title="Command-line Tools: Processing" href="../../../../../../../../../../../../../../../../www/command-line-processing.html">Processing</a>
</div>
<div class="sub">
<a title="Command-line Tools: Options" href="../../../../../../../../../../../../../../../../www/command-line-options.html">Options</a>
</div>
<div class="sub">
<a title="Command-line Tools: Usage" href="http://www.imagemagick.org/Usage/">Usage</a>
</div>
<div class="menu">
<a title="Program Interfaces" href="../../../../../../../../../../../../../../../../www/api.html">Program Interfaces</a>
</div>
<div class="sub">
<a title="Program Interface: MagickWand" href="../../../../../../../../../../../../../../../../www/magick-wand.html">MagickWand</a>
</div>
<div class="sub">
<a title="Program Interface: MagickCore" href="../../../../../../../../../../../../../../../../www/magick-core.html">MagickCore</a>
</div>
<div class="sub">
<a title="Program Interface: PerlMagick" href="../../../../../../../../../../../../../../../../www/perl-magick.html">PerlMagick</a>
</div>
<div class="sub">
<a title="Program Interface: Magick++" href="../../../../../../../../../../../../../../../../www/magick++.html">Magick++</a>
</div>
<div class="sep"></div>
<div class="menu">
<a title="Install from Source" href="../../../../../../../../../../../../../../../../www/install-source.html">Install from Source</a>
</div>
<div class="sub">
<a title="Install from Source: Unix" href="../../../../../../../../../../../../../../../../www/install-source.html#unix">Unix</a>
</div>
<div class="sub">
<a title="Install from Source: Windows" href="../../../../../../../../../../../../../../../../www/install-source.html#windows">Windows</a>
</div>
<div class="menu">
<a title="Resources" href="../../../../../../../../../../../../../../../../www/resources.html">Resources</a>
</div>
<div class="menu">
<a title="Architecture" href="../../../../../../../../../../../../../../../../www/architecture.html">Architecture</a>
</div>
<div class="menu">
<a title="Download" href="../../../../../../../../../../../../../../../../www/download.html">Download</a>
</div>
<div class="sep"></div>
<div class="menu">
<a title="Search" href="../../../../../../../../../../../../../../../../www/search.html">Search</a>
</div>
<div class="sep"></div>
<div class="menu">
<a title="Site Map" href="../../../../../../../../../../../../../../../../www/sitemap.html">Site Map</a>
</div>
<div class="sub">
<a title="Site Map: Links" href="../../../../../../../../../../../../../../../../www/links.html">Links</a>
</div>
<div class="sep"></div>
<div class="menu">
<a rel="follow" title="Sponsors" href="../../../../../../../../../../../../../../../../www/sponsors.html">Sponsors:</a>
<a href="http://www.networkredux.com"> <img src="../../../../../../../../../../../../../../../../images/networkredux.png" width="140" height="31" alt="[sponsor]" style="margin-top: 4px; margin-left: 4px; border: 0px; float: left;" /></a>
<a href="http://www.dinodirect.com/ipads-tablets/"> <img src="../../../../../../../../../../../../../../../../images/dino-direct.jpg" width="140" height="90" alt="[sponsor]" style="margin-top: 4px; margin-left: 4px; border: 0px; float: left;" /></a><!-- 201208010120 mickey@163... -->
<div class="sponsbox">
<div class="sponsor">
<a rel="follow" title="Sponsor: The Fastest & Easiest Way to Find Images" href="http://www.graphicsfactory.com">The Fastest & Easiest Way to Find Images</a><!-- 201210010270 graphicsfac... -->
</div>
<div class="sponsor">
<a rel="follow" title="Sponsor: VPS" href="http://www.interdominios.com/vps">VPS</a><!-- 201209010090 barsh@inter... -->
</div>
<div class="sponsor">
<a rel="follow" title="Werbebanner Werbeplane" href="http://www.allesbanner.de">Werbebanner Werbeplane</a><!-- 201212010450 info@druck... -->
</div>
<div class="sponsor">
<a rel="follow" title="Entertainment News & Photos" href="http://www.zimbio.com">Entertainment News & Photos</a><!-- 201211010540 bd@zimb... -->
</div>
<div class="sponsor">
<a rel="follow" title="Sponsor: LED24" href="http://led24.de/">LED24</a><!-- 201207010270 info@led24... -->
</div>
<div class="sponsor">
<a rel="follow" title="Sponsor: Best Website Hosting" href="http://www.top-cheap-web-hosting.com">Best Website Hosting</a><!-- 201304010090 eunge.liu-->
</div>
<div class="sponsor">
<a rel="follow" title="Android Tablet" href="http://www.dinodirect.com/ipads-tablets/">Android Tablet</a><!-- 201208010120 mickey@163... -->
</div>
<div class="sponsor">
<a rel="follow" title="Sponsor: Web Site Hosting" href="http://webhostinggeeks.com">Web Site Hosting</a><!-- 201302010900 funds@enmob... -->
</div>
<div class="sponsor">
<a rel="follow" title="Sponsor: Premium Quality Stock Photos" href="http://www.f1online.pro/en/">Premium Quality Stock Photos</a><!-- 2012080100540 ... -->
</div>
<div class="sponsor">
<a rel="follow" title="Sponsor: Druckerei" href="http://print24.com/de/">Druckerei</a><!-- 2012070100250 ... -->
</div>
<div class="sponsor">
<a rel="follow" title="Sponsor: Managed Server" href="http://www.robhost.de">Managed Server</a><!-- 201210010720 klikics... -->
</div>
<div class="sponsor">
<a rel="follow" title="Sponsor: Druckerei" href="http://www.allesdruck.de">Druckerei</a><!-- 201303011500 r.leo -->
</div>
<div class="sponsor">
<a rel="follow" title="Sponsor: Got Stripes" href="http://www.stripeslawncare.org">Got Stripes?</a><!-- 2012090100150 brooks@stripes...-->
</div>
<div class="sponsor">
<a rel="follow" title="Sponsor: Fototapete - Tapetendruck" href="http://www.druck-expert.com/Fototapete-Tapetendruck,category,8830.html">Fototapete - Tapetendruck</a><!-- 2012100100155 info@druck-->
</div>
</div>
</div>
</div>
<div class="eastbar">
<div class="g-plusone" id="gplusone"></div>
<script type="text/javascript">
window.___gcfg = {
lang: 'en-US'
};
(function() {
var po = document.createElement('script');
po.type = 'text/javascript'; po.async = true;
po.src = 'https://apis.google.com/js/plusone.js';
var script = document.getElementsByTagName('script')[0];
script.parentNode.insertBefore(po, script);
})();
var gplusone = document.getElementById("gplusone");
gplusone.setAttribute("data-size","medium");
gplusone.setAttribute("data-count","false");
</script>
</div>
<div class="main">
<h1>Module compare Methods</h1>
<p class="navigation-index">[<a href="compare.html#CompareImageChannels">CompareImageChannels</a> • <a href="compare.html#GetImageChannelDistortion">GetImageChannelDistortion</a> • <a href="compare.html#GetImageChannelDistrortion">GetImageChannelDistrortion</a> • <a href="compare.html#IsImagesEqual">IsImagesEqual</a> • <a href="compare.html#SimilarityImage">SimilarityImage</a>]</p>
<h2><a href="http://www.imagemagick.org/api/MagickCore/compare_8c.html" id="CompareImageChannels">CompareImageChannels</a></h2>
<div class="doc-section">
<p>CompareImageChannels() compares one or more image channels of an image to a reconstructed image and returns the difference image.</p>
<p>The format of the CompareImageChannels method is:</p>
<pre class="code">
Image *CompareImageChannels(const Image *image,
const Image *reconstruct_image,const ChannelType channel,
const MetricType metric,double *distortion,ExceptionInfo *exception)
</pre>
<p>A description of each parameter follows:</p>
<h5>image</h5>
<p>the image.</p>
<h5>reconstruct_image</h5>
<p>the reconstruct image.</p>
<h5>channel</h5>
<p>the channel.</p>
<h5>metric</h5>
<p>the metric.</p>
<h5>distortion</h5>
<p>the computed distortion between the images.</p>
<h5>exception</h5>
<p>return any errors or warnings in this structure.</p>
</div>
<h2><a href="http://www.imagemagick.org/api/MagickCore/compare_8c.html" id="GetImageChannelDistortion">GetImageChannelDistortion</a></h2>
<div class="doc-section">
<p>GetImageChannelDistortion() compares one or more image channels of an image to a reconstructed image and returns the specified distortion metric.</p>
<p>The format of the CompareImageChannels method is:</p>
<pre class="code">
MagickBooleanType GetImageChannelDistortion(const Image *image,
const Image *reconstruct_image,const ChannelType channel,
const MetricType metric,double *distortion,ExceptionInfo *exception)
</pre>
<p>A description of each parameter follows:</p>
<h5>image</h5>
<p>the image.</p>
<h5>reconstruct_image</h5>
<p>the reconstruct image.</p>
<h5>channel</h5>
<p>the channel.</p>
<h5>metric</h5>
<p>the metric.</p>
<h5>distortion</h5>
<p>the computed distortion between the images.</p>
<h5>exception</h5>
<p>return any errors or warnings in this structure.</p>
</div>
<h2><a href="http://www.imagemagick.org/api/MagickCore/compare_8c.html" id="GetImageChannelDistrortion">GetImageChannelDistrortion</a></h2>
<div class="doc-section">
<p>GetImageChannelDistrortion() compares the image channels of an image to a reconstructed image and returns the specified distortion metric for each channel.</p>
<p>The format of the CompareImageChannels method is:</p>
<pre class="code">
double *GetImageChannelDistortions(const Image *image,
const Image *reconstruct_image,const MetricType metric,
ExceptionInfo *exception)
</pre>
<p>A description of each parameter follows:</p>
<h5>image</h5>
<p>the image.</p>
<h5>reconstruct_image</h5>
<p>the reconstruct image.</p>
<h5>metric</h5>
<p>the metric.</p>
<h5>exception</h5>
<p>return any errors or warnings in this structure.</p>
</div>
<h2><a href="http://www.imagemagick.org/api/MagickCore/compare_8c.html" id="IsImagesEqual">IsImagesEqual</a></h2>
<div class="doc-section">
<p>IsImagesEqual() measures the difference between colors at each pixel location of two images. A value other than 0 means the colors match exactly. Otherwise an error measure is computed by summing over all pixels in an image the distance squared in RGB space between each image pixel and its corresponding pixel in the reconstruct image. The error measure is assigned to these image members:</p>
<pre class="text">
o mean_error_per_pixel: The mean error for any single pixel in
the image.
</pre>
<h5>normalized_mean_error</h5>
<p>The normalized mean quantization error for any single pixel in the image. This distance measure is normalized to a range between 0 and 1. It is independent of the range of red, green, and blue values in the image.</p>
<h5>normalized_maximum_error</h5>
<p>The normalized maximum quantization error for any single pixel in the image. This distance measure is normalized to a range between 0 and 1. It is independent of the range of red, green, and blue values in your image.</p>
<p>A small normalized mean square error, accessed as image->normalized_mean_error, suggests the images are very similar in spatial layout and color.</p>
<p>The format of the IsImagesEqual method is:</p>
<pre class="code">
MagickBooleanType IsImagesEqual(Image *image,
const Image *reconstruct_image)
</pre>
<p>A description of each parameter follows.</p>
<h5>image</h5>
<p>the image.</p>
<h5>reconstruct_image</h5>
<p>the reconstruct image.</p>
</div>
<h2><a href="http://www.imagemagick.org/api/MagickCore/compare_8c.html" id="SimilarityImage">SimilarityImage</a></h2>
<div class="doc-section">
<p>SimilarityImage() compares the reference image of the image and returns the best match offset. In addition, it returns a similarity image such that an exact match location is completely white and if none of the pixels match, black, otherwise some gray level in-between.</p>
<p>The format of the SimilarityImageImage method is:</p>
<pre class="code">
Image *SimilarityImage(const Image *image,const Image *reference,
RectangleInfo *offset,double *similarity,ExceptionInfo *exception)
</pre>
<p>A description of each parameter follows:</p>
<h5>image</h5>
<p>the image.</p>
<h5>reference</h5>
<p>find an area of the image that closely resembles this image.</p>
<p>o the best match offset of the reference image within the image.</p>
<h5>similarity</h5>
<p>the computed similarity between the images.</p>
<h5>exception</h5>
<p>return any errors or warnings in this structure.</p>
</div>
</div>
<div id="linkbar">
<span id="linkbar-west"> </span>
<span id="linkbar-center">
<a href="../../../../../../../../../../../../../../../../discourse-server">Discourse Server</a> •
<a href="http://www.imagemagick.org/MagickStudio/scripts/MagickStudio.cgi">Studio</a>
</span>
<span id="linkbar-east"> </span>
</div>
<div class="footer">
<span id="footer-west">© 1999-2012 ImageMagick Studio LLC</span>
<span id="footer-east"> <a href="http://www.imagemagick.org/script/contact.php">Contact the Wizards</a></span>
</div>
<div style="clear: both; margin: 0; width: 100%; "></div>
<script type="text/javascript">
var _gaq = _gaq || [];
_gaq.push(['_setAccount', 'UA-17690367-1']);
_gaq.push(['_trackPageview']);
(function() {
var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;
ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';
var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);
})();
</script>
</body>
</html>
|
