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176
cristy307ba182010-12-25 01:00:34 +0000[diff] [blame]177<h1>Module resize
178 Methods</h1>
cristy73fd1cd2010-09-12 19:14:25 +0000[diff] [blame]179<p class="navigation-index">[<a href="#AdaptiveResizeImage">AdaptiveResizeImage</a> &bull; <a href="#MagnifyImage">MagnifyImage</a> &bull; <a href="#MinifyImage">MinifyImage</a> &bull; <a href="#ResampleImage">ResampleImage</a> &bull; <a href="#LiquidRescaleImage">LiquidRescaleImage</a> &bull; <a href="#ResizeImage">ResizeImage</a> &bull; <a href="#SampleImage">SampleImage</a> &bull; <a href="#ScaleImage">ScaleImage</a> &bull; <a href="#ThumbnailImage">ThumbnailImage</a>]</p>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]180
181<h2><a href="http://www.imagemagick.org/api/MagickCore/resize
182_8c.html" target="source" name="AdaptiveResizeImage">AdaptiveResizeImage</a></h2>
183<div class="doc-section">
184
185<p>AdaptiveResizeImage() adaptively resize image with pixel resampling.</p></ol>
186
187<p>The format of the AdaptiveResizeImage method is:</p>
188
189<pre class="code">
cristybc9539a2010-08-16 18:06:20 +0000[diff] [blame]190 Image *AdaptiveResizeImage(const Image *image,const size_t columns,
191 const size_t rows,ExceptionInfo *exception)
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]192</pre>
193
194<p>A description of each parameter follows:</p></ol>
195
196<h5>image</h5>
197<ol><p>the image.</p></ol>
198
199<h5>columns</h5>
200<ol><p>the number of columns in the resized image.</p></ol>
201
202<h5>rows</h5>
203<ol><p>the number of rows in the resized image.</p></ol>
204
205<h5>exception</h5>
206<ol><p>return any errors or warnings in this structure.</p></ol>
207
208 </div>
209<h2><a href="http://www.imagemagick.org/api/MagickCore/resize
210_8c.html" target="source" name="MagnifyImage">MagnifyImage</a></h2>
211<div class="doc-section">
212
213<p>MagnifyImage() is a convenience method that scales an image proportionally to twice its size.</p></ol>
214
215<p>The format of the MagnifyImage method is:</p>
216
217<pre class="code">
218 Image *MagnifyImage(const Image *image,ExceptionInfo *exception)
219</pre>
220
221<p>A description of each parameter follows:</p></ol>
222
223<h5>image</h5>
224<ol><p>the image.</p></ol>
225
226<h5>exception</h5>
227<ol><p>return any errors or warnings in this structure.</p></ol>
228
229 </div>
230<h2><a href="http://www.imagemagick.org/api/MagickCore/resize
231_8c.html" target="source" name="MinifyImage">MinifyImage</a></h2>
232<div class="doc-section">
233
234<p>MinifyImage() is a convenience method that scales an image proportionally to half its size.</p></ol>
235
236<p>The format of the MinifyImage method is:</p>
237
238<pre class="code">
239 Image *MinifyImage(const Image *image,ExceptionInfo *exception)
240</pre>
241
242<p>A description of each parameter follows:</p></ol>
243
244<h5>image</h5>
245<ol><p>the image.</p></ol>
246
247<h5>exception</h5>
248<ol><p>return any errors or warnings in this structure.</p></ol>
249
250 </div>
251<h2><a href="http://www.imagemagick.org/api/MagickCore/resize
252_8c.html" target="source" name="ResampleImage">ResampleImage</a></h2>
253<div class="doc-section">
254
255<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></ol>
256
257<p>The format of the ResampleImage method is:</p>
258
259<pre class="code">
260 Image *ResampleImage(Image *image,const double x_resolution,
261 const double y_resolution,const FilterTypes filter,const double blur,
262 ExceptionInfo *exception)
263</pre>
264
265<p>A description of each parameter follows:</p></ol>
266
267<h5>image</h5>
268<ol><p>the image to be resized to fit the given resolution.</p></ol>
269
270<h5>x_resolution</h5>
271<ol><p>the new image x resolution.</p></ol>
272
273<h5>y_resolution</h5>
274<ol><p>the new image y resolution.</p></ol>
275
276<h5>filter</h5>
277<ol><p>Image filter to use.</p></ol>
278
279<h5>blur</h5>
280<ol><p>the blur factor where > 1 is blurry, < 1 is sharp.</p></ol>
281
282 </div>
283<h2><a href="http://www.imagemagick.org/api/MagickCore/resize
284_8c.html" target="source" name="LiquidRescaleImage">LiquidRescaleImage</a></h2>
285<div class="doc-section">
286
287<p>LiquidRescaleImage() rescales image with seam carving.</p></ol>
288
289<p>The format of the LiquidRescaleImage method is:</p>
290
291<pre class="code">
292 Image *LiquidRescaleImage(const Image *image,
cristybb503372010-05-27 20:51:26 +0000[diff] [blame]293 const size_t columns,const size_t rows,
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]294 const double delta_x,const double rigidity,ExceptionInfo *exception)
295</pre>
296
297<p>A description of each parameter follows:</p></ol>
298
299<h5>image</h5>
300<ol><p>the image.</p></ol>
301
302<h5>columns</h5>
303<ol><p>the number of columns in the rescaled image.</p></ol>
304
305<h5>rows</h5>
306<ol><p>the number of rows in the rescaled image.</p></ol>
307
308<h5>delta_x</h5>
309<ol><p>maximum seam transversal step (0 means straight seams).</p></ol>
310
311<h5>rigidity</h5>
312<ol><p>introduce a bias for non-straight seams (typically 0).</p></ol>
313
314<h5>exception</h5>
315<ol><p>return any errors or warnings in this structure.</p></ol>
316
317 </div>
318<h2><a href="http://www.imagemagick.org/api/MagickCore/resize
319_8c.html" target="source" name="ResizeImage">ResizeImage</a></h2>
320<div class="doc-section">
321
cristy73fd1cd2010-09-12 19:14:25 +0000[diff] [blame]322<p>ResizeImage() scales an image to the desired dimensions, using the given filter (see AcquireFilterInfo()).</p></ol>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]323
324<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></ol>
325
326<p>ResizeImage() was inspired by Paul Heckbert's "zoom" program.</p></ol>
327
328<p>The format of the ResizeImage method is:</p>
329
330<pre class="code">
cristybb503372010-05-27 20:51:26 +0000[diff] [blame]331 Image *ResizeImage(Image *image,const size_t columns,
332 const size_t rows,const FilterTypes filter,const double blur,
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]333 ExceptionInfo *exception)
334</pre>
335
336<p>A description of each parameter follows:</p></ol>
337
338<h5>image</h5>
339<ol><p>the image.</p></ol>
340
341<h5>columns</h5>
342<ol><p>the number of columns in the scaled image.</p></ol>
343
344<h5>rows</h5>
345<ol><p>the number of rows in the scaled image.</p></ol>
346
347<h5>filter</h5>
348<ol><p>Image filter to use.</p></ol>
349
350<h5>blur</h5>
cristybc9539a2010-08-16 18:06:20 +0000[diff] [blame]351<ol><p>the blur factor where > 1 is blurry, < 1 is sharp. Typically set this to 1.0.</p></ol>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]352
353<h5>exception</h5>
354<ol><p>return any errors or warnings in this structure.</p></ol>
355
356 </div>
357<h2><a href="http://www.imagemagick.org/api/MagickCore/resize
358_8c.html" target="source" name="SampleImage">SampleImage</a></h2>
359<div class="doc-section">
360
361<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></ol>
362
363<p>The format of the SampleImage method is:</p>
364
365<pre class="code">
cristybb503372010-05-27 20:51:26 +0000[diff] [blame]366 Image *SampleImage(const Image *image,const size_t columns,
367 const size_t rows,ExceptionInfo *exception)
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]368</pre>
369
370<p>A description of each parameter follows:</p></ol>
371
372<h5>image</h5>
373<ol><p>the image.</p></ol>
374
375<h5>columns</h5>
376<ol><p>the number of columns in the sampled image.</p></ol>
377
378<h5>rows</h5>
379<ol><p>the number of rows in the sampled image.</p></ol>
380
381<h5>exception</h5>
382<ol><p>return any errors or warnings in this structure.</p></ol>
383
384 </div>
385<h2><a href="http://www.imagemagick.org/api/MagickCore/resize
386_8c.html" target="source" name="ScaleImage">ScaleImage</a></h2>
387<div class="doc-section">
388
389<p>ScaleImage() changes the size of an image to the given dimensions.</p></ol>
390
391<p>The format of the ScaleImage method is:</p>
392
393<pre class="code">
cristybb503372010-05-27 20:51:26 +0000[diff] [blame]394 Image *ScaleImage(const Image *image,const size_t columns,
395 const size_t rows,ExceptionInfo *exception)
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]396</pre>
397
398<p>A description of each parameter follows:</p></ol>
399
400<h5>image</h5>
401<ol><p>the image.</p></ol>
402
403<h5>columns</h5>
404<ol><p>the number of columns in the scaled image.</p></ol>
405
406<h5>rows</h5>
407<ol><p>the number of rows in the scaled image.</p></ol>
408
409<h5>exception</h5>
410<ol><p>return any errors or warnings in this structure.</p></ol>
411
412 </div>
413<h2><a href="http://www.imagemagick.org/api/MagickCore/resize
414_8c.html" target="source" name="ThumbnailImage">ThumbnailImage</a></h2>
415<div class="doc-section">
416
417<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></ol>
418
419<p>The format of the ThumbnailImage method is:</p>
420
421<pre class="code">
cristybb503372010-05-27 20:51:26 +0000[diff] [blame]422 Image *ThumbnailImage(const Image *image,const size_t columns,
423 const size_t rows,ExceptionInfo *exception)
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]424</pre>
425
426<p>A description of each parameter follows:</p></ol>
427
428<h5>image</h5>
429<ol><p>the image.</p></ol>
430
431<h5>columns</h5>
432<ol><p>the number of columns in the scaled image.</p></ol>
433
434<h5>rows</h5>
435<ol><p>the number of rows in the scaled image.</p></ol>
436
437<h5>exception</h5>
438<ol><p>return any errors or warnings in this structure.</p></ol>
439
440 </div>
cristy3eaa0ef2010-03-06 20:35:26 +0000[diff] [blame]441
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