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216<div class="main">
217
cristy20398432011-08-11 01:31:50 +0000[diff] [blame]218<h1>Module resize Methods</h1>
219<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>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]220
cristy20398432011-08-11 01:31:50 +0000[diff] [blame]221<h2><a href="http://www.imagemagick.org/api/MagickCore/resize_8c.html" id="AdaptiveResizeImage">AdaptiveResizeImage</a></h2>
222<div class="doc-section">
223
224<p>AdaptiveResizeImage() adaptively resize image with pixel resampling.</p>
225
226<p>The format of the AdaptiveResizeImage method is:</p>
227
228<pre class="code">
229 Image *AdaptiveResizeImage(const Image *image,const size_t columns,
230 const size_t rows,ExceptionInfo *exception)
231</pre>
232
233<p>A description of each parameter follows:</p>
234
235<h5>image</h5>
236<p>the image.</p>
237
238<h5>columns</h5>
239<p>the number of columns in the resized image.</p>
240
241<h5>rows</h5>
242<p>the number of rows in the resized image.</p>
243
244<h5>exception</h5>
245<p>return any errors or warnings in this structure.</p>
246
247 </div>
248<h2><a href="http://www.imagemagick.org/api/MagickCore/resize_8c.html" id="MagnifyImage">MagnifyImage</a></h2>
249<div class="doc-section">
250
251<p>MagnifyImage() is a convenience method that scales an image proportionally to twice its size.</p>
252
253<p>The format of the MagnifyImage method is:</p>
254
255<pre class="code">
256 Image *MagnifyImage(const Image *image,ExceptionInfo *exception)
257</pre>
258
259<p>A description of each parameter follows:</p>
260
261<h5>image</h5>
262<p>the image.</p>
263
264<h5>exception</h5>
265<p>return any errors or warnings in this structure.</p>
266
267 </div>
268<h2><a href="http://www.imagemagick.org/api/MagickCore/resize_8c.html" id="MinifyImage">MinifyImage</a></h2>
269<div class="doc-section">
270
271<p>MinifyImage() is a convenience method that scales an image proportionally to half its size.</p>
272
273<p>The format of the MinifyImage method is:</p>
274
275<pre class="code">
276 Image *MinifyImage(const Image *image,ExceptionInfo *exception)
277</pre>
278
279<p>A description of each parameter follows:</p>
280
281<h5>image</h5>
282<p>the image.</p>
283
284<h5>exception</h5>
285<p>return any errors or warnings in this structure.</p>
286
287 </div>
288<h2><a href="http://www.imagemagick.org/api/MagickCore/resize_8c.html" id="ResampleImage">ResampleImage</a></h2>
289<div class="doc-section">
290
291<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>
292
293<p>The format of the ResampleImage method is:</p>
294
295<pre class="code">
296 Image *ResampleImage(Image *image,const double x_resolution,
297 const double y_resolution,const FilterTypes filter,const double blur,
298 ExceptionInfo *exception)
299</pre>
300
301<p>A description of each parameter follows:</p>
302
303<h5>image</h5>
304<p>the image to be resized to fit the given resolution.</p>
305
306<h5>x_resolution</h5>
307<p>the new image x resolution.</p>
308
309<h5>y_resolution</h5>
310<p>the new image y resolution.</p>
311
312<h5>filter</h5>
313<p>Image filter to use.</p>
314
315<h5>blur</h5>
316<p>the blur factor where > 1 is blurry, < 1 is sharp.</p>
317
318 </div>
319<h2><a href="http://www.imagemagick.org/api/MagickCore/resize_8c.html" id="LiquidRescaleImage">LiquidRescaleImage</a></h2>
320<div class="doc-section">
321
322<p>LiquidRescaleImage() rescales image with seam carving.</p>
323
324<p>The format of the LiquidRescaleImage method is:</p>
325
326<pre class="code">
327 Image *LiquidRescaleImage(const Image *image,
328 const size_t columns,const size_t rows,
329 const double delta_x,const double rigidity,ExceptionInfo *exception)
330</pre>
331
332<p>A description of each parameter follows:</p>
333
334<h5>image</h5>
335<p>the image.</p>
336
337<h5>columns</h5>
338<p>the number of columns in the rescaled image.</p>
339
340<h5>rows</h5>
341<p>the number of rows in the rescaled image.</p>
342
343<h5>delta_x</h5>
344<p>maximum seam transversal step (0 means straight seams).</p>
345
346<h5>rigidity</h5>
347<p>introduce a bias for non-straight seams (typically 0).</p>
348
349<h5>exception</h5>
350<p>return any errors or warnings in this structure.</p>
351
352 </div>
353<h2><a href="http://www.imagemagick.org/api/MagickCore/resize_8c.html" id="ResizeImage">ResizeImage</a></h2>
354<div class="doc-section">
355
356<p>ResizeImage() scales an image to the desired dimensions, using the given filter (see AcquireFilterInfo()).</p>
357
358<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>
359
360<p>ResizeImage() was inspired by Paul Heckbert's "zoom" program.</p>
361
362<p>The format of the ResizeImage method is:</p>
363
364<pre class="code">
365 Image *ResizeImage(Image *image,const size_t columns,
366 const size_t rows,const FilterTypes filter,const double blur,
367 ExceptionInfo *exception)
368</pre>
369
370<p>A description of each parameter follows:</p>
371
372<h5>image</h5>
373<p>the image.</p>
374
375<h5>columns</h5>
376<p>the number of columns in the scaled image.</p>
377
378<h5>rows</h5>
379<p>the number of rows in the scaled image.</p>
380
381<h5>filter</h5>
382<p>Image filter to use.</p>
383
384<h5>blur</h5>
385<p>the blur factor where > 1 is blurry, < 1 is sharp. Typically set this to 1.0.</p>
386
387<h5>exception</h5>
388<p>return any errors or warnings in this structure.</p>
389
390 </div>
391<h2><a href="http://www.imagemagick.org/api/MagickCore/resize_8c.html" id="SampleImage">SampleImage</a></h2>
392<div class="doc-section">
393
394<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>
395
396<p>The format of the SampleImage method is:</p>
397
398<pre class="code">
399 Image *SampleImage(const Image *image,const size_t columns,
400 const size_t rows,ExceptionInfo *exception)
401</pre>
402
403<p>A description of each parameter follows:</p>
404
405<h5>image</h5>
406<p>the image.</p>
407
408<h5>columns</h5>
409<p>the number of columns in the sampled image.</p>
410
411<h5>rows</h5>
412<p>the number of rows in the sampled image.</p>
413
414<h5>exception</h5>
415<p>return any errors or warnings in this structure.</p>
416
417 </div>
418<h2><a href="http://www.imagemagick.org/api/MagickCore/resize_8c.html" id="ScaleImage">ScaleImage</a></h2>
419<div class="doc-section">
420
421<p>ScaleImage() changes the size of an image to the given dimensions.</p>
422
423<p>The format of the ScaleImage method is:</p>
424
425<pre class="code">
426 Image *ScaleImage(const Image *image,const size_t columns,
427 const size_t rows,ExceptionInfo *exception)
428</pre>
429
430<p>A description of each parameter follows:</p>
431
432<h5>image</h5>
433<p>the image.</p>
434
435<h5>columns</h5>
436<p>the number of columns in the scaled image.</p>
437
438<h5>rows</h5>
439<p>the number of rows in the scaled image.</p>
440
441<h5>exception</h5>
442<p>return any errors or warnings in this structure.</p>
443
444 </div>
445<h2><a href="http://www.imagemagick.org/api/MagickCore/resize_8c.html" id="ThumbnailImage">ThumbnailImage</a></h2>
446<div class="doc-section">
447
448<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>
449
450<p>The format of the ThumbnailImage method is:</p>
451
452<pre class="code">
453 Image *ThumbnailImage(const Image *image,const size_t columns,
454 const size_t rows,ExceptionInfo *exception)
455</pre>
456
457<p>A description of each parameter follows:</p>
458
459<h5>image</h5>
460<p>the image.</p>
461
462<h5>columns</h5>
463<p>the number of columns in the scaled image.</p>
464
465<h5>rows</h5>
466<p>the number of rows in the scaled image.</p>
467
468<h5>exception</h5>
469<p>return any errors or warnings in this structure.</p>
470
471 </div>
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