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8    <title>ImageMagick: MagickCore, C API for ImageMagick: Resize an Image</title>
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59<p class="text-center"><a href="resize.html#AdaptiveResizeImage">AdaptiveResizeImage</a> &#8226; <a href="resize.html#InterpolativeResizeImage">InterpolativeResizeImage</a> &#8226; <a href="resize.html#LiquidRescaleImage">LiquidRescaleImage</a> &#8226; <a href="resize.html#MagnifyImage">MagnifyImage</a> &#8226; <a href="resize.html#MinifyImage">MinifyImage</a> &#8226; <a href="resize.html#ResampleImage">ResampleImage</a> &#8226; <a href="resize.html#ResizeImage">ResizeImage</a> &#8226; <a href="resize.html#SampleImage">SampleImage</a> &#8226; <a href="resize.html#ScaleImage">ScaleImage</a> &#8226; <a href="resize.html#ThumbnailImage">ThumbnailImage</a></p>
60
61<h2><a href="http://www.imagemagick.org/api/MagickCore/resize_8c.html" id="AdaptiveResizeImage">AdaptiveResizeImage</a></h2>
62
63<p>AdaptiveResizeImage() adaptively resize image with pixel resampling.</p>
64
65<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>
66
67<p>The format of the AdaptiveResizeImage method is:</p>
68
69<pre class="text">
70Image *AdaptiveResizeImage(const Image *image,const size_t columns,
71  const size_t rows,ExceptionInfo *exception)
72</pre>
73
74<p>A description of each parameter follows:</p>
75
76<dd>
77</dd>
78
79<dd> </dd>
80<dl class="dl-horizontal">
81<dt>image</dt>
82<dd>the image. </dd>
83
84<dd> </dd>
85<dt>columns</dt>
86<dd>the number of columns in the resized image. </dd>
87
88<dd> </dd>
89<dt>rows</dt>
90<dd>the number of rows in the resized image. </dd>
91
92<dd> </dd>
93<dt>exception</dt>
94<dd>return any errors or warnings in this structure. </dd>
95
96<dd>  </dd>
97</dl>
98<h2><a href="http://www.imagemagick.org/api/MagickCore/resize_8c.html" id="InterpolativeResizeImage">InterpolativeResizeImage</a></h2>
99
100<p>InterpolativeResizeImage() resizes an image using the specified interpolation method.</p>
101
102<p>The format of the InterpolativeResizeImage method is:</p>
103
104<pre class="text">
105Image *InterpolativeResizeImage(const Image *image,const size_t columns,
106  const size_t rows,const PixelInterpolateMethod method,
107  ExceptionInfo *exception)
108</pre>
109
110<p>A description of each parameter follows:</p>
111
112<dd>
113</dd>
114
115<dd> </dd>
116<dl class="dl-horizontal">
117<dt>image</dt>
118<dd>the image. </dd>
119
120<dd> </dd>
121<dt>columns</dt>
122<dd>the number of columns in the resized image. </dd>
123
124<dd> </dd>
125<dt>rows</dt>
126<dd>the number of rows in the resized image. </dd>
127
128<dd> </dd>
129<dt>method</dt>
130<dd>the pixel interpolation method. </dd>
131
132<dd> </dd>
133<dt>exception</dt>
134<dd>return any errors or warnings in this structure. </dd>
135
136<dd>  </dd>
137</dl>
138<h2><a href="http://www.imagemagick.org/api/MagickCore/resize_8c.html" id="LiquidRescaleImage">LiquidRescaleImage</a></h2>
139
140<p>LiquidRescaleImage() rescales image with seam carving.</p>
141
142<p>The format of the LiquidRescaleImage method is:</p>
143
144<pre class="text">
145Image *LiquidRescaleImage(const Image *image,const size_t columns,
146  const size_t rows,const double delta_x,const double rigidity,
147  ExceptionInfo *exception)
148</pre>
149
150<p>A description of each parameter follows:</p>
151
152<dd>
153</dd>
154
155<dd> </dd>
156<dl class="dl-horizontal">
157<dt>image</dt>
158<dd>the image. </dd>
159
160<dd> </dd>
161<dt>columns</dt>
162<dd>the number of columns in the rescaled image. </dd>
163
164<dd> </dd>
165<dt>rows</dt>
166<dd>the number of rows in the rescaled image. </dd>
167
168<dd> </dd>
169<dt>delta_x</dt>
170<dd>maximum seam transversal step (0 means straight seams). </dd>
171
172<dd> </dd>
173<dt>rigidity</dt>
174<dd>introduce a bias for non-straight seams (typically 0). </dd>
175
176<dd> </dd>
177<dt>exception</dt>
178<dd>return any errors or warnings in this structure. </dd>
179
180<dd>  </dd>
181</dl>
182<h2><a href="http://www.imagemagick.org/api/MagickCore/resize_8c.html" id="MagnifyImage">MagnifyImage</a></h2>
183
184<p>MagnifyImage() doubles the size of the image with a pixel art scaling algorithm.</p>
185
186<p>The format of the MagnifyImage method is:</p>
187
188<pre class="text">
189Image *MagnifyImage(const Image *image,ExceptionInfo *exception)
190</pre>
191
192<p>A description of each parameter follows:</p>
193
194<dd>
195</dd>
196
197<dd> </dd>
198<dl class="dl-horizontal">
199<dt>image</dt>
200<dd>the image. </dd>
201
202<dd> </dd>
203<dt>exception</dt>
204<dd>return any errors or warnings in this structure. </dd>
205
206<dd>  </dd>
207</dl>
208<h2><a href="http://www.imagemagick.org/api/MagickCore/resize_8c.html" id="MinifyImage">MinifyImage</a></h2>
209
210<p>MinifyImage() is a convenience method that scales an image proportionally to half its size.</p>
211
212<p>The format of the MinifyImage method is:</p>
213
214<pre class="text">
215Image *MinifyImage(const Image *image,ExceptionInfo *exception)
216</pre>
217
218<p>A description of each parameter follows:</p>
219
220<dd>
221</dd>
222
223<dd> </dd>
224<dl class="dl-horizontal">
225<dt>image</dt>
226<dd>the image. </dd>
227
228<dd> </dd>
229<dt>exception</dt>
230<dd>return any errors or warnings in this structure. </dd>
231
232<dd>  </dd>
233</dl>
234<h2><a href="http://www.imagemagick.org/api/MagickCore/resize_8c.html" id="ResampleImage">ResampleImage</a></h2>
235
236<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>
237
238<p>The format of the ResampleImage method is:</p>
239
240<pre class="text">
241Image *ResampleImage(Image *image,const double x_resolution,
242  const double y_resolution,const FilterType filter,
243  ExceptionInfo *exception)
244</pre>
245
246<p>A description of each parameter follows:</p>
247
248<dd>
249</dd>
250
251<dd> </dd>
252<dl class="dl-horizontal">
253<dt>image</dt>
254<dd>the image to be resized to fit the given resolution. </dd>
255
256<dd> </dd>
257<dt>x_resolution</dt>
258<dd>the new image x resolution. </dd>
259
260<dd> </dd>
261<dt>y_resolution</dt>
262<dd>the new image y resolution. </dd>
263
264<dd> </dd>
265<dt>filter</dt>
266<dd>Image filter to use. </dd>
267
268<dd> </dd>
269<dt>exception</dt>
270<dd>return any errors or warnings in this structure. </dd>
271
272<dd>  </dd>
273</dl>
274<h2><a href="http://www.imagemagick.org/api/MagickCore/resize_8c.html" id="ResizeImage">ResizeImage</a></h2>
275
276<p>ResizeImage() scales an image to the desired dimensions, using the given filter (see AcquireFilterInfo()).</p>
277
278<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>
279
280<p>ResizeImage() was inspired by Paul Heckbert's "zoom" program.</p>
281
282<p>The format of the ResizeImage method is:</p>
283
284<pre class="text">
285Image *ResizeImage(Image *image,const size_t columns,const size_t rows,
286  const FilterType filter,ExceptionInfo *exception)
287</pre>
288
289<p>A description of each parameter follows:</p>
290
291<dd>
292</dd>
293
294<dd> </dd>
295<dl class="dl-horizontal">
296<dt>image</dt>
297<dd>the image. </dd>
298
299<dd> </dd>
300<dt>columns</dt>
301<dd>the number of columns in the scaled image. </dd>
302
303<dd> </dd>
304<dt>rows</dt>
305<dd>the number of rows in the scaled image. </dd>
306
307<dd> </dd>
308<dt>filter</dt>
309<dd>Image filter to use. </dd>
310
311<dd> </dd>
312<dt>exception</dt>
313<dd>return any errors or warnings in this structure. </dd>
314
315<dd>  </dd>
316</dl>
317<h2><a href="http://www.imagemagick.org/api/MagickCore/resize_8c.html" id="SampleImage">SampleImage</a></h2>
318
319<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>
320
321<p>The format of the SampleImage method is:</p>
322
323<pre class="text">
324Image *SampleImage(const Image *image,const size_t columns,
325  const size_t rows,ExceptionInfo *exception)
326</pre>
327
328<p>A description of each parameter follows:</p>
329
330<dd>
331</dd>
332
333<dd> </dd>
334<dl class="dl-horizontal">
335<dt>image</dt>
336<dd>the image. </dd>
337
338<dd> </dd>
339<dt>columns</dt>
340<dd>the number of columns in the sampled image. </dd>
341
342<dd> </dd>
343<dt>rows</dt>
344<dd>the number of rows in the sampled image. </dd>
345
346<dd> </dd>
347<dt>exception</dt>
348<dd>return any errors or warnings in this structure. </dd>
349
350<dd>  </dd>
351</dl>
352<h2><a href="http://www.imagemagick.org/api/MagickCore/resize_8c.html" id="ScaleImage">ScaleImage</a></h2>
353
354<p>ScaleImage() changes the size of an image to the given dimensions.</p>
355
356<p>The format of the ScaleImage method is:</p>
357
358<pre class="text">
359Image *ScaleImage(const Image *image,const size_t columns,
360  const size_t rows,ExceptionInfo *exception)
361</pre>
362
363<p>A description of each parameter follows:</p>
364
365<dd>
366</dd>
367
368<dd> </dd>
369<dl class="dl-horizontal">
370<dt>image</dt>
371<dd>the image. </dd>
372
373<dd> </dd>
374<dt>columns</dt>
375<dd>the number of columns in the scaled image. </dd>
376
377<dd> </dd>
378<dt>rows</dt>
379<dd>the number of rows in the scaled image. </dd>
380
381<dd> </dd>
382<dt>exception</dt>
383<dd>return any errors or warnings in this structure. </dd>
384
385<dd>  </dd>
386</dl>
387<h2><a href="http://www.imagemagick.org/api/MagickCore/resize_8c.html" id="ThumbnailImage">ThumbnailImage</a></h2>
388
389<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>
390
391<p>The format of the ThumbnailImage method is:</p>
392
393<pre class="text">
394Image *ThumbnailImage(const Image *image,const size_t columns,
395  const size_t rows,ExceptionInfo *exception)
396</pre>
397
398<p>A description of each parameter follows:</p>
399
400<dd>
401</dd>
402
403<dd> </dd>
404<dl class="dl-horizontal">
405<dt>image</dt>
406<dd>the image. </dd>
407
408<dd> </dd>
409<dt>columns</dt>
410<dd>the number of columns in the scaled image. </dd>
411
412<dd> </dd>
413<dt>rows</dt>
414<dd>the number of rows in the scaled image. </dd>
415
416<dd> </dd>
417<dt>exception</dt>
418<dd>return any errors or warnings in this structure. </dd>
419
420<dd>  </dd>
421</dl>
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