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168<div class="main">
169
cristy307ba182010-12-25 01:00:34 +0000[diff] [blame^]170<h1>Module fx
171 Methods</h1>
cristy0291e2d2010-04-04 17:50:18 +0000[diff] [blame]172<p class="navigation-index">[<a href="#AddNoiseImage">AddNoiseImage</a> &bull; <a href="#BlueShiftImage">BlueShiftImage</a> &bull; <a href="#CharcoalImage">CharcoalImage</a> &bull; <a href="#ColorizeImage">ColorizeImage</a> &bull; <a href="#ColorMatrixImage">ColorMatrixImage</a> &bull; <a href="#FxImage">FxImage</a> &bull; <a href="#ImplodeImage">ImplodeImage</a> &bull; <a href="#The MorphImages">The MorphImages</a> &bull; <a href="#PlasmaImage">PlasmaImage</a> &bull; <a href="#PolaroidImage">PolaroidImage</a> &bull; <a href="#MagickSepiaToneImage">MagickSepiaToneImage</a> &bull; <a href="#ShadowImage">ShadowImage</a> &bull; <a href="#SketchImage">SketchImage</a> &bull; <a href="#SolarizeImage">SolarizeImage</a> &bull; <a href="#SteganoImage">SteganoImage</a> &bull; <a href="#StereoAnaglyphImage">StereoAnaglyphImage</a> &bull; <a href="#SwirlImage">SwirlImage</a> &bull; <a href="#TintImage">TintImage</a> &bull; <a href="#VignetteImage">VignetteImage</a> &bull; <a href="#WaveImage">WaveImage</a>]</p>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]173
174<h2><a href="http://www.imagemagick.org/api/MagickCore/fx
175_8c.html" target="source" name="AddNoiseImage">AddNoiseImage</a></h2>
176<div class="doc-section">
177
178<p>AddNoiseImage() adds random noise to the image.</p></ol>
179
180<p>The format of the AddNoiseImage method is:</p>
181
182<pre class="code">
183 Image *AddNoiseImage(const Image *image,const NoiseType noise_type,
184 ExceptionInfo *exception)
185 Image *AddNoiseImageChannel(const Image *image,const ChannelType channel,
186 const NoiseType noise_type,ExceptionInfo *exception)
187</pre>
188
189<p>A description of each parameter follows:</p></ol>
190
191<h5>image</h5>
192<ol><p>the image.</p></ol>
193
194<h5>channel</h5>
195<ol><p>the channel type.</p></ol>
196
197<h5>noise_type</h5>
198<ol><p>The type of noise: Uniform, Gaussian, Multiplicative, Impulse, Laplacian, or Poisson.</p></ol>
199
200<h5>exception</h5>
201<ol><p>return any errors or warnings in this structure.</p></ol>
202
203 </div>
204<h2><a href="http://www.imagemagick.org/api/MagickCore/fx
205_8c.html" target="source" name="BlueShiftImage">BlueShiftImage</a></h2>
206<div class="doc-section">
207
208<p>BlueShiftImage() mutes the colors of the image to simulate a scene at nighttime in the moonlight.</p></ol>
209
210<p>The format of the BlueShiftImage method is:</p>
211
212<pre class="code">
213 Image *BlueShiftImage(const Image *image,const double factor,
214 ExceptionInfo *exception)
215</pre>
216
217<p>A description of each parameter follows:</p></ol>
218
219<h5>image</h5>
220<ol><p>the image.</p></ol>
221
222<h5>factor</h5>
223<ol><p>the shift factor.</p></ol>
224
225<h5>exception</h5>
226<ol><p>return any errors or warnings in this structure.</p></ol>
227
228 </div>
229<h2><a href="http://www.imagemagick.org/api/MagickCore/fx
230_8c.html" target="source" name="CharcoalImage">CharcoalImage</a></h2>
231<div class="doc-section">
232
233<p>CharcoalImage() creates a new image that is a copy of an existing one with the edge highlighted. It allocates the memory necessary for the new Image structure and returns a pointer to the new image.</p></ol>
234
235<p>The format of the CharcoalImage method is:</p>
236
237<pre class="code">
238 Image *CharcoalImage(const Image *image,const double radius,
239 const double sigma,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>radius</h5>
248<ol><p>the radius of the pixel neighborhood.</p></ol>
249
250<h5>sigma</h5>
251<ol><p>the standard deviation of the Gaussian, in pixels.</p></ol>
252
253<h5>exception</h5>
254<ol><p>return any errors or warnings in this structure.</p></ol>
255
256 </div>
257<h2><a href="http://www.imagemagick.org/api/MagickCore/fx
258_8c.html" target="source" name="ColorizeImage">ColorizeImage</a></h2>
259<div class="doc-section">
260
261<p>ColorizeImage() blends the fill color with each pixel in the image. A percentage blend is specified with opacity. Control the application of different color components by specifying a different percentage for each component (e.g. 90/100/10 is 90 red, 100 green, and 10 blue).</p></ol>
262
263<p>The format of the ColorizeImage method is:</p>
264
265<pre class="code">
266 Image *ColorizeImage(const Image *image,const char *opacity,
267 const PixelPacket colorize,ExceptionInfo *exception)
268</pre>
269
270<p>A description of each parameter follows:</p></ol>
271
272<h5>image</h5>
273<ol><p>the image.</p></ol>
274
275<h5>opacity</h5>
276<ol><p>A character string indicating the level of opacity as a percentage.</p></ol>
277
278<h5>colorize</h5>
279<ol><p>A color value.</p></ol>
280
281<h5>exception</h5>
282<ol><p>return any errors or warnings in this structure.</p></ol>
283
284 </div>
285<h2><a href="http://www.imagemagick.org/api/MagickCore/fx
cristy0291e2d2010-04-04 17:50:18 +0000[diff] [blame]286_8c.html" target="source" name="ColorMatrixImage">ColorMatrixImage</a></h2>
287<div class="doc-section">
288
289<p>ColorMatrixImage() applies color transformation to an image. This method permits saturation changes, hue rotation, luminance to alpha, and various other effects. Although variable-sized transformation matrices can be used, typically one uses a 5x5 matrix for an RGBA image and a 6x6 for CMYKA (or RGBA with offsets). The matrix is similar to those used by Adobe Flash except offsets are in column 6 rather than 5 (in support of CMYKA images) and offsets are normalized (divide Flash offset by 255).</p></ol>
290
291<p>The format of the ColorMatrixImage method is:</p>
292
293<pre class="code">
294 Image *ColorMatrixImage(const Image *image,
295 const KernelInfo *color_matrix,ExceptionInfo *exception)
296</pre>
297
298<p>A description of each parameter follows:</p></ol>
299
300<h5>image</h5>
301<ol><p>the image.</p></ol>
302
303<h5>color_matrix</h5>
304<ol><p>the color matrix.</p></ol>
305
306<h5>exception</h5>
307<ol><p>return any errors or warnings in this structure.</p></ol>
308
309 </div>
310<h2><a href="http://www.imagemagick.org/api/MagickCore/fx
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]311_8c.html" target="source" name="FxImage">FxImage</a></h2>
312<div class="doc-section">
313
314<p>FxImage() applies a mathematical expression to the specified image.</p></ol>
315
316<p>The format of the FxImage method is:</p>
317
318<pre class="code">
319 Image *FxImage(const Image *image,const char *expression,
320 ExceptionInfo *exception)
321 Image *FxImageChannel(const Image *image,const ChannelType channel,
322 const char *expression,ExceptionInfo *exception)
323</pre>
324
325<p>A description of each parameter follows:</p></ol>
326
327<h5>image</h5>
328<ol><p>the image.</p></ol>
329
330<h5>channel</h5>
331<ol><p>the channel.</p></ol>
332
333<h5>expression</h5>
334<ol><p>A mathematical expression.</p></ol>
335
336<h5>exception</h5>
337<ol><p>return any errors or warnings in this structure.</p></ol>
338
339 </div>
340<h2><a href="http://www.imagemagick.org/api/MagickCore/fx
341_8c.html" target="source" name="ImplodeImage">ImplodeImage</a></h2>
342<div class="doc-section">
343
344<p>ImplodeImage() creates a new image that is a copy of an existing one with the image pixels "implode" by the specified percentage. It allocates the memory necessary for the new Image structure and returns a pointer to the new image.</p></ol>
345
346<p>The format of the ImplodeImage method is:</p>
347
348<pre class="code">
349 Image *ImplodeImage(const Image *image,const double amount,
350 ExceptionInfo *exception)
351</pre>
352
353<p>A description of each parameter follows:</p></ol>
354
355<h5>implode_image</h5>
356<ol><p>Method ImplodeImage returns a pointer to the image after it is implode. A null image is returned if there is a memory shortage.</p></ol>
357
358<h5>image</h5>
359<ol><p>the image.</p></ol>
360
361<h5>amount</h5>
362<ol><p>Define the extent of the implosion.</p></ol>
363
364<h5>exception</h5>
365<ol><p>return any errors or warnings in this structure.</p></ol>
366
367 </div>
368<h2><a href="http://www.imagemagick.org/api/MagickCore/fx
369_8c.html" target="source" name="The MorphImages">The MorphImages</a></h2>
370<div class="doc-section">
371
372<p>The MorphImages() method requires a minimum of two images. The first image is transformed into the second by a number of intervening images as specified by frames.</p></ol>
373
374<p>The format of the MorphImage method is:</p>
375
376<pre class="code">
cristybb503372010-05-27 20:51:26 +0000[diff] [blame]377 Image *MorphImages(const Image *image,const size_t number_frames,
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]378 ExceptionInfo *exception)
379</pre>
380
381<p>A description of each parameter follows:</p></ol>
382
383<h5>image</h5>
384<ol><p>the image.</p></ol>
385
386<h5>number_frames</h5>
387<ol><p>Define the number of in-between image to generate. The more in-between frames, the smoother the morph.</p></ol>
388
389<h5>exception</h5>
390<ol><p>return any errors or warnings in this structure.</p></ol>
391
392 </div>
393<h2><a href="http://www.imagemagick.org/api/MagickCore/fx
394_8c.html" target="source" name="PlasmaImage">PlasmaImage</a></h2>
395<div class="doc-section">
396
397<p>PlasmaImage() initializes an image with plasma fractal values. The image must be initialized with a base color and the random number generator seeded before this method is called.</p></ol>
398
399<p>The format of the PlasmaImage method is:</p>
400
401<pre class="code">
402 MagickBooleanType PlasmaImage(Image *image,const SegmentInfo *segment,
cristybb503372010-05-27 20:51:26 +0000[diff] [blame]403 size_t attenuate,size_t depth)
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]404</pre>
405
406<p>A description of each parameter follows:</p></ol>
407
408<h5>image</h5>
409<ol><p>the image.</p></ol>
410
411<h5>segment</h5>
412<ol><p> Define the region to apply plasma fractals values.</p></ol>
413
414<h5>attenuate</h5>
cristy8030a5b2010-09-17 18:31:49 +0000[diff] [blame]415<ol><p>Define the plasma attenuation factor.</p></ol>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]416
417<h5>depth</h5>
418<ol><p>Limit the plasma recursion depth.</p></ol>
419
420 </div>
421<h2><a href="http://www.imagemagick.org/api/MagickCore/fx
422_8c.html" target="source" name="PolaroidImage">PolaroidImage</a></h2>
423<div class="doc-section">
424
425<p>PolaroidImage() simulates a Polaroid picture.</p></ol>
426
427<p>The format of the AnnotateImage method is:</p>
428
429<pre class="code">
430 Image *PolaroidImage(const Image *image,const DrawInfo *draw_info,
431 const double angle,ExceptionInfo exception)
432</pre>
433
434<p>A description of each parameter follows:</p></ol>
435
436<h5>image</h5>
437<ol><p>the image.</p></ol>
438
439<h5>draw_info</h5>
440<ol><p>the draw info.</p></ol>
441
442<h5>angle</h5>
cristyeaedf062010-05-29 22:36:02 +0000[diff] [blame]443<ol><p>Apply the effect along this angle.</p></ol>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]444
445<h5>exception</h5>
446<ol><p>return any errors or warnings in this structure.</p></ol>
447
448 </div>
449<h2><a href="http://www.imagemagick.org/api/MagickCore/fx
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]450_8c.html" target="source" name="MagickSepiaToneImage">MagickSepiaToneImage</a></h2>
451<div class="doc-section">
452
453<p>MagickSepiaToneImage() applies a special effect to the image, similar to the effect achieved in a photo darkroom by sepia toning. Threshold ranges from 0 to QuantumRange and is a measure of the extent of the sepia toning. A threshold of 80 is a good starting point for a reasonable tone.</p></ol>
454
455<p>The format of the SepiaToneImage method is:</p>
456
457<pre class="code">
458 Image *SepiaToneImage(const Image *image,const double threshold,
459 ExceptionInfo *exception)
460</pre>
461
462<p>A description of each parameter follows:</p></ol>
463
464<h5>image</h5>
465<ol><p>the image.</p></ol>
466
467<h5>threshold</h5>
468<ol><p>the tone threshold.</p></ol>
469
470<h5>exception</h5>
471<ol><p>return any errors or warnings in this structure.</p></ol>
472
473 </div>
474<h2><a href="http://www.imagemagick.org/api/MagickCore/fx
475_8c.html" target="source" name="ShadowImage">ShadowImage</a></h2>
476<div class="doc-section">
477
478<p>ShadowImage() simulates a shadow from the specified image and returns it.</p></ol>
479
480<p>The format of the ShadowImage method is:</p>
481
482<pre class="code">
483 Image *ShadowImage(const Image *image,const double opacity,
cristybb503372010-05-27 20:51:26 +0000[diff] [blame]484 const double sigma,const ssize_t x_offset,const ssize_t y_offset,
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]485 ExceptionInfo *exception)
486</pre>
487
488<p>A description of each parameter follows:</p></ol>
489
490<h5>image</h5>
491<ol><p>the image.</p></ol>
492
493<h5>opacity</h5>
494<ol><p>percentage transparency.</p></ol>
495
496<h5>sigma</h5>
497<ol><p>the standard deviation of the Gaussian, in pixels.</p></ol>
498
499<h5>x_offset</h5>
500<ol><p>the shadow x-offset.</p></ol>
501
502<h5>y_offset</h5>
503<ol><p>the shadow y-offset.</p></ol>
504
505<h5>exception</h5>
506<ol><p>return any errors or warnings in this structure.</p></ol>
507
508 </div>
509<h2><a href="http://www.imagemagick.org/api/MagickCore/fx
510_8c.html" target="source" name="SketchImage">SketchImage</a></h2>
511<div class="doc-section">
512
513<p>SketchImage() simulates a pencil sketch. We convolve the image with a Gaussian operator of the given radius and standard deviation (sigma). For reasonable results, radius should be larger than sigma. Use a radius of 0 and SketchImage() selects a suitable radius for you. Angle gives the angle of the sketch.</p></ol>
514
515<p>The format of the SketchImage method is:</p>
516
517<pre class="code">
518 Image *SketchImage(const Image *image,const double radius,
519 const double sigma,const double angle,ExceptionInfo *exception)
520</pre>
521
522<p>A description of each parameter follows:</p></ol>
523
524<h5>image</h5>
525<ol><p>the image.</p></ol>
526
527<h5>radius</h5>
528<ol><p>the radius of the Gaussian, in pixels, not counting the center pixel.</p></ol>
529
530<h5>sigma</h5>
531<ol><p>the standard deviation of the Gaussian, in pixels.</p></ol>
532
533<h5>angle</h5>
cristyeaedf062010-05-29 22:36:02 +0000[diff] [blame]534<ol><p>Apply the effect along this angle.</p></ol>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]535
536<h5>exception</h5>
537<ol><p>return any errors or warnings in this structure.</p></ol>
538
539 </div>
540<h2><a href="http://www.imagemagick.org/api/MagickCore/fx
541_8c.html" target="source" name="SolarizeImage">SolarizeImage</a></h2>
542<div class="doc-section">
543
544<p>SolarizeImage() applies a special effect to the image, similar to the effect achieved in a photo darkroom by selectively exposing areas of photo sensitive paper to light. Threshold ranges from 0 to QuantumRange and is a measure of the extent of the solarization.</p></ol>
545
546<p>The format of the SolarizeImage method is:</p>
547
548<pre class="code">
549 MagickBooleanType SolarizeImage(Image *image,const double threshold)
550</pre>
551
552<p>A description of each parameter follows:</p></ol>
553
554<h5>image</h5>
555<ol><p>the image.</p></ol>
556
557<h5>threshold</h5>
558<ol><p>Define the extent of the solarization.</p></ol>
559
560 </div>
561<h2><a href="http://www.imagemagick.org/api/MagickCore/fx
562_8c.html" target="source" name="SteganoImage">SteganoImage</a></h2>
563<div class="doc-section">
564
565<p>SteganoImage() hides a digital watermark within the image. Recover the hidden watermark later to prove that the authenticity of an image. Offset defines the start position within the image to hide the watermark.</p></ol>
566
567<p>The format of the SteganoImage method is:</p>
568
569<pre class="code">
570 Image *SteganoImage(const Image *image,Image *watermark,
571 ExceptionInfo *exception)
572</pre>
573
574<p>A description of each parameter follows:</p></ol>
575
576<h5>image</h5>
577<ol><p>the image.</p></ol>
578
579<h5>watermark</h5>
580<ol><p>the watermark image.</p></ol>
581
582<h5>exception</h5>
583<ol><p>return any errors or warnings in this structure.</p></ol>
584
585 </div>
586<h2><a href="http://www.imagemagick.org/api/MagickCore/fx
587_8c.html" target="source" name="StereoAnaglyphImage">StereoAnaglyphImage</a></h2>
588<div class="doc-section">
589
590<p>StereoAnaglyphImage() combines two images and produces a single image that is the composite of a left and right image of a stereo pair. Special red-green stereo glasses are required to view this effect.</p></ol>
591
592<p>The format of the StereoAnaglyphImage method is:</p>
593
594<pre class="code">
595 Image *StereoImage(const Image *left_image,const Image *right_image,
596 ExceptionInfo *exception)
597 Image *StereoAnaglyphImage(const Image *left_image,
cristybb503372010-05-27 20:51:26 +0000[diff] [blame]598 const Image *right_image,const ssize_t x_offset,const ssize_t y_offset,
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]599 ExceptionInfo *exception)
600</pre>
601
602<p>A description of each parameter follows:</p></ol>
603
604<h5>left_image</h5>
605<ol><p>the left image.</p></ol>
606
607<h5>right_image</h5>
608<ol><p>the right image.</p></ol>
609
610<h5>exception</h5>
611<ol><p>return any errors or warnings in this structure.</p></ol>
612
613<h5>x_offset</h5>
614<ol><p>amount, in pixels, by which the left image is offset to the right of the right image.</p></ol>
615
616<h5>y_offset</h5>
617<ol><p>amount, in pixels, by which the left image is offset to the bottom of the right image.</p></ol>
618
619
620 </div>
621<h2><a href="http://www.imagemagick.org/api/MagickCore/fx
622_8c.html" target="source" name="SwirlImage">SwirlImage</a></h2>
623<div class="doc-section">
624
625<p>SwirlImage() swirls the pixels about the center of the image, where degrees indicates the sweep of the arc through which each pixel is moved. You get a more dramatic effect as the degrees move from 1 to 360.</p></ol>
626
627<p>The format of the SwirlImage method is:</p>
628
629<pre class="code">
630 Image *SwirlImage(const Image *image,double degrees,
631 ExceptionInfo *exception)
632</pre>
633
634<p>A description of each parameter follows:</p></ol>
635
636<h5>image</h5>
637<ol><p>the image.</p></ol>
638
639<h5>degrees</h5>
640<ol><p>Define the tightness of the swirling effect.</p></ol>
641
642<h5>exception</h5>
643<ol><p>return any errors or warnings in this structure.</p></ol>
644
645 </div>
646<h2><a href="http://www.imagemagick.org/api/MagickCore/fx
647_8c.html" target="source" name="TintImage">TintImage</a></h2>
648<div class="doc-section">
649
650<p>TintImage() applies a color vector to each pixel in the image. The length of the vector is 0 for black and white and at its maximum for the midtones. The vector weighting function is f(x)=(1-(4.0*((x-0.5)*(x-0.5))))</p></ol>
651
652<p>The format of the TintImage method is:</p>
653
654<pre class="code">
655 Image *TintImage(const Image *image,const char *opacity,
656 const PixelPacket tint,ExceptionInfo *exception)
657</pre>
658
659<p>A description of each parameter follows:</p></ol>
660
661<h5>image</h5>
662<ol><p>the image.</p></ol>
663
664<h5>opacity</h5>
665<ol><p>A color value used for tinting.</p></ol>
666
667<h5>tint</h5>
668<ol><p>A color value used for tinting.</p></ol>
669
670<h5>exception</h5>
671<ol><p>return any errors or warnings in this structure.</p></ol>
672
673 </div>
674<h2><a href="http://www.imagemagick.org/api/MagickCore/fx
675_8c.html" target="source" name="VignetteImage">VignetteImage</a></h2>
676<div class="doc-section">
677
678<p>VignetteImage() softens the edges of the image in vignette style.</p></ol>
679
680<p>The format of the VignetteImage method is:</p>
681
682<pre class="code">
683 Image *VignetteImage(const Image *image,const double radius,
cristybb503372010-05-27 20:51:26 +0000[diff] [blame]684 const double sigma,const ssize_t x,const ssize_t y,ExceptionInfo *exception)
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]685</pre>
686
687<p>A description of each parameter follows:</p></ol>
688
689<h5>image</h5>
690<ol><p>the image.</p></ol>
691
692<h5>radius</h5>
693<ol><p>the radius of the pixel neighborhood.</p></ol>
694
695<h5>sigma</h5>
696<ol><p>the standard deviation of the Gaussian, in pixels.</p></ol>
697
698<h5>x, y</h5>
699<ol><p>Define the x and y ellipse offset.</p></ol>
700
701<h5>exception</h5>
702<ol><p>return any errors or warnings in this structure.</p></ol>
703
704 </div>
705<h2><a href="http://www.imagemagick.org/api/MagickCore/fx
706_8c.html" target="source" name="WaveImage">WaveImage</a></h2>
707<div class="doc-section">
708
cristyeaedf062010-05-29 22:36:02 +0000[diff] [blame]709<p>WaveImage() creates a "ripple" effect in the image by shifting the pixels vertically along a sine wave whose amplitude and wavelength is specified by the given parameters.</p></ol>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]710
711<p>The format of the WaveImage method is:</p>
712
713<pre class="code">
714 Image *WaveImage(const Image *image,const double amplitude,
715 const double wave_length,ExceptionInfo *exception)
716</pre>
717
718<p>A description of each parameter follows:</p></ol>
719
720<h5>image</h5>
721<ol><p>the image.</p></ol>
722
723<h5>amplitude, wave_length</h5>
724<ol><p>Define the amplitude and wave length of the sine wave.</p></ol>
725
726<h5>exception</h5>
727<ol><p>return any errors or warnings in this structure.</p></ol>
728
729 </div>
cristy3eaa0ef2010-03-06 20:35:26 +0000[diff] [blame]730
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732
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