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
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
|
<!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: Resize 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:, resize, 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="resize.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="resize.html#AdaptiveResizeImage">AdaptiveResizeImage</a> • <a href="resize.html#InterpolativeResizeImage">InterpolativeResizeImage</a> • <a href="resize.html#LiquidRescaleImage">LiquidRescaleImage</a> • <a href="resize.html#MagnifyImage">MagnifyImage</a> • <a href="resize.html#MinifyImage">MinifyImage</a> • <a href="resize.html#ResampleImage">ResampleImage</a> • <a href="resize.html#ResizeImage">ResizeImage</a> • <a href="resize.html#SampleImage">SampleImage</a> • <a href="resize.html#ScaleImage">ScaleImage</a> • <a href="resize.html#ThumbnailImage">ThumbnailImage</a></p>
<h2><a href="../../api/MagickCore/resize_8c.html" id="AdaptiveResizeImage">AdaptiveResizeImage</a></h2>
<p>AdaptiveResizeImage() adaptively resize image with pixel resampling.</p>
<p>This is shortcut function for a fast interpolative resize using mesh interpolation. It works well for small resizes of less than +/- 50 of the original image size. For larger resizing on images a full filtered and slower resize function should be used instead.</p>
<p>The format of the AdaptiveResizeImage method is:</p>
<pre class="text">
Image *AdaptiveResizeImage(const Image *image,const size_t columns,
const size_t rows,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>columns</dt>
<dd>the number of columns in the resized image. </dd>
<dd> </dd>
<dt>rows</dt>
<dd>the number of rows in the resized image. </dd>
<dd> </dd>
<dt>exception</dt>
<dd>return any errors or warnings in this structure. </dd>
<dd> </dd>
</dl>
<h2><a href="../../api/MagickCore/resize_8c.html" id="InterpolativeResizeImage">InterpolativeResizeImage</a></h2>
<p>InterpolativeResizeImage() resizes an image using the specified interpolation method.</p>
<p>The format of the InterpolativeResizeImage method is:</p>
<pre class="text">
Image *InterpolativeResizeImage(const Image *image,const size_t columns,
const size_t rows,const PixelInterpolateMethod method,
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>columns</dt>
<dd>the number of columns in the resized image. </dd>
<dd> </dd>
<dt>rows</dt>
<dd>the number of rows in the resized image. </dd>
<dd> </dd>
<dt>method</dt>
<dd>the pixel interpolation method. </dd>
<dd> </dd>
<dt>exception</dt>
<dd>return any errors or warnings in this structure. </dd>
<dd> </dd>
</dl>
<h2><a href="../../api/MagickCore/resize_8c.html" id="LiquidRescaleImage">LiquidRescaleImage</a></h2>
<p>LiquidRescaleImage() rescales image with seam carving.</p>
<p>The format of the LiquidRescaleImage method is:</p>
<pre class="text">
Image *LiquidRescaleImage(const Image *image,const size_t columns,
const size_t rows,const double delta_x,const double rigidity,
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>columns</dt>
<dd>the number of columns in the rescaled image. </dd>
<dd> </dd>
<dt>rows</dt>
<dd>the number of rows in the rescaled image. </dd>
<dd> </dd>
<dt>delta_x</dt>
<dd>maximum seam transversal step (0 means straight seams). </dd>
<dd> </dd>
<dt>rigidity</dt>
<dd>introduce a bias for non-straight seams (typically 0). </dd>
<dd> </dd>
<dt>exception</dt>
<dd>return any errors or warnings in this structure. </dd>
<dd> </dd>
</dl>
<h2><a href="../../api/MagickCore/resize_8c.html" id="MagnifyImage">MagnifyImage</a></h2>
<p>MagnifyImage() doubles the size of the image with a pixel art scaling algorithm.</p>
<p>The format of the MagnifyImage method is:</p>
<pre class="text">
Image *MagnifyImage(const 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>
<h2><a href="../../api/MagickCore/resize_8c.html" id="MinifyImage">MinifyImage</a></h2>
<p>MinifyImage() is a convenience method that scales an image proportionally to half its size.</p>
<p>The format of the MinifyImage method is:</p>
<pre class="text">
Image *MinifyImage(const 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>
<h2><a href="../../api/MagickCore/resize_8c.html" id="ResampleImage">ResampleImage</a></h2>
<p>ResampleImage() resize image in terms of its pixel size, so that when displayed at the given resolution it will be the same size in terms of real world units as the original image at the original resolution.</p>
<p>The format of the ResampleImage method is:</p>
<pre class="text">
Image *ResampleImage(Image *image,const double x_resolution,
const double y_resolution,const FilterType filter,
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 to be resized to fit the given resolution. </dd>
<dd> </dd>
<dt>x_resolution</dt>
<dd>the new image x resolution. </dd>
<dd> </dd>
<dt>y_resolution</dt>
<dd>the new image y resolution. </dd>
<dd> </dd>
<dt>filter</dt>
<dd>Image filter to use. </dd>
<dd> </dd>
<dt>exception</dt>
<dd>return any errors or warnings in this structure. </dd>
<dd> </dd>
</dl>
<h2><a href="../../api/MagickCore/resize_8c.html" id="ResizeImage">ResizeImage</a></h2>
<p>ResizeImage() scales an image to the desired dimensions, using the given filter (see AcquireFilterInfo()).</p>
<p>If an undefined filter is given the filter defaults to Mitchell for a colormapped image, a image with a matte channel, or if the image is enlarged. Otherwise the filter defaults to a Lanczos.</p>
<p>ResizeImage() was inspired by Paul Heckbert's "zoom" program.</p>
<p>The format of the ResizeImage method is:</p>
<pre class="text">
Image *ResizeImage(Image *image,const size_t columns,const size_t rows,
const FilterType filter,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>columns</dt>
<dd>the number of columns in the scaled image. </dd>
<dd> </dd>
<dt>rows</dt>
<dd>the number of rows in the scaled image. </dd>
<dd> </dd>
<dt>filter</dt>
<dd>Image filter to use. </dd>
<dd> </dd>
<dt>exception</dt>
<dd>return any errors or warnings in this structure. </dd>
<dd> </dd>
</dl>
<h2><a href="../../api/MagickCore/resize_8c.html" id="SampleImage">SampleImage</a></h2>
<p>SampleImage() scales an image to the desired dimensions with pixel sampling. Unlike other scaling methods, this method does not introduce any additional color into the scaled image.</p>
<p>The format of the SampleImage method is:</p>
<pre class="text">
Image *SampleImage(const Image *image,const size_t columns,
const size_t rows,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>columns</dt>
<dd>the number of columns in the sampled image. </dd>
<dd> </dd>
<dt>rows</dt>
<dd>the number of rows in the sampled image. </dd>
<dd> </dd>
<dt>exception</dt>
<dd>return any errors or warnings in this structure. </dd>
<dd> </dd>
</dl>
<h2><a href="../../api/MagickCore/resize_8c.html" id="ScaleImage">ScaleImage</a></h2>
<p>ScaleImage() changes the size of an image to the given dimensions.</p>
<p>The format of the ScaleImage method is:</p>
<pre class="text">
Image *ScaleImage(const Image *image,const size_t columns,
const size_t rows,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>columns</dt>
<dd>the number of columns in the scaled image. </dd>
<dd> </dd>
<dt>rows</dt>
<dd>the number of rows in the scaled image. </dd>
<dd> </dd>
<dt>exception</dt>
<dd>return any errors or warnings in this structure. </dd>
<dd> </dd>
</dl>
<h2><a href="../../api/MagickCore/resize_8c.html" id="ThumbnailImage">ThumbnailImage</a></h2>
<p>ThumbnailImage() changes the size of an image to the given dimensions and removes any associated profiles. The goal is to produce small low cost thumbnail images suited for display on the Web.</p>
<p>The format of the ThumbnailImage method is:</p>
<pre class="text">
Image *ThumbnailImage(const Image *image,const size_t columns,
const size_t rows,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>columns</dt>
<dd>the number of columns in the scaled image. </dd>
<dd> </dd>
<dt>rows</dt>
<dd>the number of rows in the scaled 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="resize.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>
|
