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162
163<div class="main">
164
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]165<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> &bull; <a href="#ZoomImage">ZoomImage</a>]</p>
166
167<h2><a href="http://www.imagemagick.org/api/MagickCore/resize
168_8c.html" target="source" name="AdaptiveResizeImage">AdaptiveResizeImage</a></h2>
169<div class="doc-section">
170
171<p>AdaptiveResizeImage() adaptively resize image with pixel resampling.</p></ol>
172
173<p>The format of the AdaptiveResizeImage method is:</p>
174
175<pre class="code">
176 Image *AdaptiveResizeImage(const Image *image,
cristybb503372010-05-27 20:51:26 +0000[diff] [blame]177 const size_t columns,const size_t rows,
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]178 ExceptionInfo *exception)
179</pre>
180
181<p>A description of each parameter follows:</p></ol>
182
183<h5>image</h5>
184<ol><p>the image.</p></ol>
185
186<h5>columns</h5>
187<ol><p>the number of columns in the resized image.</p></ol>
188
189<h5>rows</h5>
190<ol><p>the number of rows in the resized image.</p></ol>
191
192<h5>exception</h5>
193<ol><p>return any errors or warnings in this structure.</p></ol>
194
195 </div>
196<h2><a href="http://www.imagemagick.org/api/MagickCore/resize
197_8c.html" target="source" name="MagnifyImage">MagnifyImage</a></h2>
198<div class="doc-section">
199
200<p>MagnifyImage() is a convenience method that scales an image proportionally to twice its size.</p></ol>
201
202<p>The format of the MagnifyImage method is:</p>
203
204<pre class="code">
205 Image *MagnifyImage(const Image *image,ExceptionInfo *exception)
206</pre>
207
208<p>A description of each parameter follows:</p></ol>
209
210<h5>image</h5>
211<ol><p>the image.</p></ol>
212
213<h5>exception</h5>
214<ol><p>return any errors or warnings in this structure.</p></ol>
215
216 </div>
217<h2><a href="http://www.imagemagick.org/api/MagickCore/resize
218_8c.html" target="source" name="MinifyImage">MinifyImage</a></h2>
219<div class="doc-section">
220
221<p>MinifyImage() is a convenience method that scales an image proportionally to half its size.</p></ol>
222
223<p>The format of the MinifyImage method is:</p>
224
225<pre class="code">
226 Image *MinifyImage(const Image *image,ExceptionInfo *exception)
227</pre>
228
229<p>A description of each parameter follows:</p></ol>
230
231<h5>image</h5>
232<ol><p>the image.</p></ol>
233
234<h5>exception</h5>
235<ol><p>return any errors or warnings in this structure.</p></ol>
236
237 </div>
238<h2><a href="http://www.imagemagick.org/api/MagickCore/resize
239_8c.html" target="source" name="ResampleImage">ResampleImage</a></h2>
240<div class="doc-section">
241
242<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>
243
244<p>The format of the ResampleImage method is:</p>
245
246<pre class="code">
247 Image *ResampleImage(Image *image,const double x_resolution,
248 const double y_resolution,const FilterTypes filter,const double blur,
249 ExceptionInfo *exception)
250</pre>
251
252<p>A description of each parameter follows:</p></ol>
253
254<h5>image</h5>
255<ol><p>the image to be resized to fit the given resolution.</p></ol>
256
257<h5>x_resolution</h5>
258<ol><p>the new image x resolution.</p></ol>
259
260<h5>y_resolution</h5>
261<ol><p>the new image y resolution.</p></ol>
262
263<h5>filter</h5>
264<ol><p>Image filter to use.</p></ol>
265
266<h5>blur</h5>
267<ol><p>the blur factor where > 1 is blurry, < 1 is sharp.</p></ol>
268
269 </div>
270<h2><a href="http://www.imagemagick.org/api/MagickCore/resize
271_8c.html" target="source" name="LiquidRescaleImage">LiquidRescaleImage</a></h2>
272<div class="doc-section">
273
274<p>LiquidRescaleImage() rescales image with seam carving.</p></ol>
275
276<p>The format of the LiquidRescaleImage method is:</p>
277
278<pre class="code">
279 Image *LiquidRescaleImage(const Image *image,
cristybb503372010-05-27 20:51:26 +0000[diff] [blame]280 const size_t columns,const size_t rows,
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]281 const double delta_x,const double rigidity,ExceptionInfo *exception)
282</pre>
283
284<p>A description of each parameter follows:</p></ol>
285
286<h5>image</h5>
287<ol><p>the image.</p></ol>
288
289<h5>columns</h5>
290<ol><p>the number of columns in the rescaled image.</p></ol>
291
292<h5>rows</h5>
293<ol><p>the number of rows in the rescaled image.</p></ol>
294
295<h5>delta_x</h5>
296<ol><p>maximum seam transversal step (0 means straight seams).</p></ol>
297
298<h5>rigidity</h5>
299<ol><p>introduce a bias for non-straight seams (typically 0).</p></ol>
300
301<h5>exception</h5>
302<ol><p>return any errors or warnings in this structure.</p></ol>
303
304 </div>
305<h2><a href="http://www.imagemagick.org/api/MagickCore/resize
306_8c.html" target="source" name="ResizeImage">ResizeImage</a></h2>
307<div class="doc-section">
308
309<p>ResizeImage() scales an image to the desired dimensions, using the given filter (see AcquireFilterInfo() ).</p></ol>
310
311<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>
312
313<p>ResizeImage() was inspired by Paul Heckbert's "zoom" program.</p></ol>
314
315<p>The format of the ResizeImage method is:</p>
316
317<pre class="code">
cristybb503372010-05-27 20:51:26 +0000[diff] [blame]318 Image *ResizeImage(Image *image,const size_t columns,
319 const size_t rows,const FilterTypes filter,const double blur,
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]320 ExceptionInfo *exception)
321</pre>
322
323<p>A description of each parameter follows:</p></ol>
324
325<h5>image</h5>
326<ol><p>the image.</p></ol>
327
328<h5>columns</h5>
329<ol><p>the number of columns in the scaled image.</p></ol>
330
331<h5>rows</h5>
332<ol><p>the number of rows in the scaled image.</p></ol>
333
334<h5>filter</h5>
335<ol><p>Image filter to use.</p></ol>
336
337<h5>blur</h5>
338<ol><p>the blur factor where > 1 is blurry, < 1 is sharp. Typically set this to 1.0.</p></ol>
339
340<h5>exception</h5>
341<ol><p>return any errors or warnings in this structure.</p></ol>
342
343 </div>
344<h2><a href="http://www.imagemagick.org/api/MagickCore/resize
345_8c.html" target="source" name="SampleImage">SampleImage</a></h2>
346<div class="doc-section">
347
348<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>
349
350<p>The format of the SampleImage method is:</p>
351
352<pre class="code">
cristybb503372010-05-27 20:51:26 +0000[diff] [blame]353 Image *SampleImage(const Image *image,const size_t columns,
354 const size_t rows,ExceptionInfo *exception)
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]355</pre>
356
357<p>A description of each parameter follows:</p></ol>
358
359<h5>image</h5>
360<ol><p>the image.</p></ol>
361
362<h5>columns</h5>
363<ol><p>the number of columns in the sampled image.</p></ol>
364
365<h5>rows</h5>
366<ol><p>the number of rows in the sampled image.</p></ol>
367
368<h5>exception</h5>
369<ol><p>return any errors or warnings in this structure.</p></ol>
370
371 </div>
372<h2><a href="http://www.imagemagick.org/api/MagickCore/resize
373_8c.html" target="source" name="ScaleImage">ScaleImage</a></h2>
374<div class="doc-section">
375
376<p>ScaleImage() changes the size of an image to the given dimensions.</p></ol>
377
378<p>The format of the ScaleImage method is:</p>
379
380<pre class="code">
cristybb503372010-05-27 20:51:26 +0000[diff] [blame]381 Image *ScaleImage(const Image *image,const size_t columns,
382 const size_t rows,ExceptionInfo *exception)
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]383</pre>
384
385<p>A description of each parameter follows:</p></ol>
386
387<h5>image</h5>
388<ol><p>the image.</p></ol>
389
390<h5>columns</h5>
391<ol><p>the number of columns in the scaled image.</p></ol>
392
393<h5>rows</h5>
394<ol><p>the number of rows in the scaled image.</p></ol>
395
396<h5>exception</h5>
397<ol><p>return any errors or warnings in this structure.</p></ol>
398
399 </div>
400<h2><a href="http://www.imagemagick.org/api/MagickCore/resize
401_8c.html" target="source" name="ThumbnailImage">ThumbnailImage</a></h2>
402<div class="doc-section">
403
404<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>
405
406<p>The format of the ThumbnailImage method is:</p>
407
408<pre class="code">
cristybb503372010-05-27 20:51:26 +0000[diff] [blame]409 Image *ThumbnailImage(const Image *image,const size_t columns,
410 const size_t rows,ExceptionInfo *exception)
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]411</pre>
412
413<p>A description of each parameter follows:</p></ol>
414
415<h5>image</h5>
416<ol><p>the image.</p></ol>
417
418<h5>columns</h5>
419<ol><p>the number of columns in the scaled image.</p></ol>
420
421<h5>rows</h5>
422<ol><p>the number of rows in the scaled image.</p></ol>
423
424<h5>exception</h5>
425<ol><p>return any errors or warnings in this structure.</p></ol>
426
427 </div>
428<h2><a href="http://www.imagemagick.org/api/MagickCore/resize
429_8c.html" target="source" name="ZoomImage">ZoomImage</a></h2>
430<div class="doc-section">
431
432<p>ZoomImage() creates a new image that is a scaled size of an existing one. It allocates the memory necessary for the new Image structure and returns a pointer to the new image. The Point filter gives fast pixel replication, Triangle is equivalent to bi-linear interpolation, and Mitchel giver slower, very high-quality results. See Graphic Gems III for details on this algorithm.</p></ol>
433
434<p>The filter member of the Image structure specifies which image filter to use. Blur specifies the blur factor where > 1 is blurry, < 1 is sharp.</p></ol>
435
436<p>The format of the ZoomImage method is:</p>
437
438<pre class="code">
cristybb503372010-05-27 20:51:26 +0000[diff] [blame]439 Image *ZoomImage(const Image *image,const size_t columns,
440 const size_t rows,ExceptionInfo *exception)
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]441</pre>
442
443<p>A description of each parameter follows:</p></ol>
444
445<h5>image</h5>
446<ol><p>the image.</p></ol>
447
448<h5>columns</h5>
449<ol><p>An integer that specifies the number of columns in the zoom image.</p></ol>
450
451<h5>rows</h5>
452<ol><p>An integer that specifies the number of rows in the scaled image.</p></ol>
453
454<h5>exception</h5>
455<ol><p>return any errors or warnings in this structure.</p></ol>
456
457 </div>
cristy3eaa0ef2010-03-06 20:35:26 +0000[diff] [blame]458
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