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173
cristy307ba182010-12-25 01:00:34 +0000[diff] [blame]174<h1>Module fx
175 Methods</h1>
cristy0291e2d2010-04-04 17:50:18 +0000[diff] [blame]176<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]177
178<h2><a href="http://www.imagemagick.org/api/MagickCore/fx
179_8c.html" target="source" name="AddNoiseImage">AddNoiseImage</a></h2>
180<div class="doc-section">
181
182<p>AddNoiseImage() adds random noise to the image.</p></ol>
183
184<p>The format of the AddNoiseImage method is:</p>
185
186<pre class="code">
187 Image *AddNoiseImage(const Image *image,const NoiseType noise_type,
188 ExceptionInfo *exception)
189 Image *AddNoiseImageChannel(const Image *image,const ChannelType channel,
190 const NoiseType noise_type,ExceptionInfo *exception)
191</pre>
192
193<p>A description of each parameter follows:</p></ol>
194
195<h5>image</h5>
196<ol><p>the image.</p></ol>
197
198<h5>channel</h5>
199<ol><p>the channel type.</p></ol>
200
201<h5>noise_type</h5>
202<ol><p>The type of noise: Uniform, Gaussian, Multiplicative, Impulse, Laplacian, or Poisson.</p></ol>
203
204<h5>exception</h5>
205<ol><p>return any errors or warnings in this structure.</p></ol>
206
207 </div>
208<h2><a href="http://www.imagemagick.org/api/MagickCore/fx
209_8c.html" target="source" name="BlueShiftImage">BlueShiftImage</a></h2>
210<div class="doc-section">
211
212<p>BlueShiftImage() mutes the colors of the image to simulate a scene at nighttime in the moonlight.</p></ol>
213
214<p>The format of the BlueShiftImage method is:</p>
215
216<pre class="code">
217 Image *BlueShiftImage(const Image *image,const double factor,
218 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>factor</h5>
227<ol><p>the shift factor.</p></ol>
228
229<h5>exception</h5>
230<ol><p>return any errors or warnings in this structure.</p></ol>
231
232 </div>
233<h2><a href="http://www.imagemagick.org/api/MagickCore/fx
234_8c.html" target="source" name="CharcoalImage">CharcoalImage</a></h2>
235<div class="doc-section">
236
237<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>
238
239<p>The format of the CharcoalImage method is:</p>
240
241<pre class="code">
242 Image *CharcoalImage(const Image *image,const double radius,
243 const double sigma,ExceptionInfo *exception)
244</pre>
245
246<p>A description of each parameter follows:</p></ol>
247
248<h5>image</h5>
249<ol><p>the image.</p></ol>
250
251<h5>radius</h5>
252<ol><p>the radius of the pixel neighborhood.</p></ol>
253
254<h5>sigma</h5>
255<ol><p>the standard deviation of the Gaussian, in pixels.</p></ol>
256
257<h5>exception</h5>
258<ol><p>return any errors or warnings in this structure.</p></ol>
259
260 </div>
261<h2><a href="http://www.imagemagick.org/api/MagickCore/fx
262_8c.html" target="source" name="ColorizeImage">ColorizeImage</a></h2>
263<div class="doc-section">
264
265<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>
266
267<p>The format of the ColorizeImage method is:</p>
268
269<pre class="code">
270 Image *ColorizeImage(const Image *image,const char *opacity,
271 const PixelPacket colorize,ExceptionInfo *exception)
272</pre>
273
274<p>A description of each parameter follows:</p></ol>
275
276<h5>image</h5>
277<ol><p>the image.</p></ol>
278
279<h5>opacity</h5>
280<ol><p>A character string indicating the level of opacity as a percentage.</p></ol>
281
282<h5>colorize</h5>
283<ol><p>A color value.</p></ol>
284
285<h5>exception</h5>
286<ol><p>return any errors or warnings in this structure.</p></ol>
287
288 </div>
289<h2><a href="http://www.imagemagick.org/api/MagickCore/fx
cristy0291e2d2010-04-04 17:50:18 +0000[diff] [blame]290_8c.html" target="source" name="ColorMatrixImage">ColorMatrixImage</a></h2>
291<div class="doc-section">
292
293<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>
294
295<p>The format of the ColorMatrixImage method is:</p>
296
297<pre class="code">
298 Image *ColorMatrixImage(const Image *image,
299 const KernelInfo *color_matrix,ExceptionInfo *exception)
300</pre>
301
302<p>A description of each parameter follows:</p></ol>
303
304<h5>image</h5>
305<ol><p>the image.</p></ol>
306
307<h5>color_matrix</h5>
308<ol><p>the color matrix.</p></ol>
309
310<h5>exception</h5>
311<ol><p>return any errors or warnings in this structure.</p></ol>
312
313 </div>
314<h2><a href="http://www.imagemagick.org/api/MagickCore/fx
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]315_8c.html" target="source" name="FxImage">FxImage</a></h2>
316<div class="doc-section">
317
318<p>FxImage() applies a mathematical expression to the specified image.</p></ol>
319
320<p>The format of the FxImage method is:</p>
321
322<pre class="code">
323 Image *FxImage(const Image *image,const char *expression,
324 ExceptionInfo *exception)
325 Image *FxImageChannel(const Image *image,const ChannelType channel,
326 const char *expression,ExceptionInfo *exception)
327</pre>
328
329<p>A description of each parameter follows:</p></ol>
330
331<h5>image</h5>
332<ol><p>the image.</p></ol>
333
334<h5>channel</h5>
335<ol><p>the channel.</p></ol>
336
337<h5>expression</h5>
338<ol><p>A mathematical expression.</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/fx
345_8c.html" target="source" name="ImplodeImage">ImplodeImage</a></h2>
346<div class="doc-section">
347
348<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>
349
350<p>The format of the ImplodeImage method is:</p>
351
352<pre class="code">
353 Image *ImplodeImage(const Image *image,const double amount,
354 ExceptionInfo *exception)
355</pre>
356
357<p>A description of each parameter follows:</p></ol>
358
359<h5>implode_image</h5>
360<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>
361
362<h5>image</h5>
363<ol><p>the image.</p></ol>
364
365<h5>amount</h5>
366<ol><p>Define the extent of the implosion.</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/fx
373_8c.html" target="source" name="The MorphImages">The MorphImages</a></h2>
374<div class="doc-section">
375
376<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>
377
378<p>The format of the MorphImage method is:</p>
379
380<pre class="code">
cristybb503372010-05-27 20:51:26 +0000[diff] [blame]381 Image *MorphImages(const Image *image,const size_t number_frames,
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]382 ExceptionInfo *exception)
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>number_frames</h5>
391<ol><p>Define the number of in-between image to generate. The more in-between frames, the smoother the morph.</p></ol>
392
393<h5>exception</h5>
394<ol><p>return any errors or warnings in this structure.</p></ol>
395
396 </div>
397<h2><a href="http://www.imagemagick.org/api/MagickCore/fx
398_8c.html" target="source" name="PlasmaImage">PlasmaImage</a></h2>
399<div class="doc-section">
400
401<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>
402
403<p>The format of the PlasmaImage method is:</p>
404
405<pre class="code">
406 MagickBooleanType PlasmaImage(Image *image,const SegmentInfo *segment,
cristybb503372010-05-27 20:51:26 +0000[diff] [blame]407 size_t attenuate,size_t depth)
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]408</pre>
409
410<p>A description of each parameter follows:</p></ol>
411
412<h5>image</h5>
413<ol><p>the image.</p></ol>
414
415<h5>segment</h5>
416<ol><p> Define the region to apply plasma fractals values.</p></ol>
417
418<h5>attenuate</h5>
cristy8030a5b2010-09-17 18:31:49 +0000[diff] [blame]419<ol><p>Define the plasma attenuation factor.</p></ol>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]420
421<h5>depth</h5>
422<ol><p>Limit the plasma recursion depth.</p></ol>
423
424 </div>
425<h2><a href="http://www.imagemagick.org/api/MagickCore/fx
426_8c.html" target="source" name="PolaroidImage">PolaroidImage</a></h2>
427<div class="doc-section">
428
429<p>PolaroidImage() simulates a Polaroid picture.</p></ol>
430
431<p>The format of the AnnotateImage method is:</p>
432
433<pre class="code">
434 Image *PolaroidImage(const Image *image,const DrawInfo *draw_info,
435 const double angle,ExceptionInfo exception)
436</pre>
437
438<p>A description of each parameter follows:</p></ol>
439
440<h5>image</h5>
441<ol><p>the image.</p></ol>
442
443<h5>draw_info</h5>
444<ol><p>the draw info.</p></ol>
445
446<h5>angle</h5>
cristyeaedf062010-05-29 22:36:02 +0000[diff] [blame]447<ol><p>Apply the effect along this angle.</p></ol>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]448
449<h5>exception</h5>
450<ol><p>return any errors or warnings in this structure.</p></ol>
451
452 </div>
453<h2><a href="http://www.imagemagick.org/api/MagickCore/fx
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]454_8c.html" target="source" name="MagickSepiaToneImage">MagickSepiaToneImage</a></h2>
455<div class="doc-section">
456
457<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>
458
459<p>The format of the SepiaToneImage method is:</p>
460
461<pre class="code">
462 Image *SepiaToneImage(const Image *image,const double threshold,
463 ExceptionInfo *exception)
464</pre>
465
466<p>A description of each parameter follows:</p></ol>
467
468<h5>image</h5>
469<ol><p>the image.</p></ol>
470
471<h5>threshold</h5>
472<ol><p>the tone threshold.</p></ol>
473
474<h5>exception</h5>
475<ol><p>return any errors or warnings in this structure.</p></ol>
476
477 </div>
478<h2><a href="http://www.imagemagick.org/api/MagickCore/fx
479_8c.html" target="source" name="ShadowImage">ShadowImage</a></h2>
480<div class="doc-section">
481
482<p>ShadowImage() simulates a shadow from the specified image and returns it.</p></ol>
483
484<p>The format of the ShadowImage method is:</p>
485
486<pre class="code">
487 Image *ShadowImage(const Image *image,const double opacity,
cristybb503372010-05-27 20:51:26 +0000[diff] [blame]488 const double sigma,const ssize_t x_offset,const ssize_t y_offset,
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]489 ExceptionInfo *exception)
490</pre>
491
492<p>A description of each parameter follows:</p></ol>
493
494<h5>image</h5>
495<ol><p>the image.</p></ol>
496
497<h5>opacity</h5>
498<ol><p>percentage transparency.</p></ol>
499
500<h5>sigma</h5>
501<ol><p>the standard deviation of the Gaussian, in pixels.</p></ol>
502
503<h5>x_offset</h5>
504<ol><p>the shadow x-offset.</p></ol>
505
506<h5>y_offset</h5>
507<ol><p>the shadow y-offset.</p></ol>
508
509<h5>exception</h5>
510<ol><p>return any errors or warnings in this structure.</p></ol>
511
512 </div>
513<h2><a href="http://www.imagemagick.org/api/MagickCore/fx
514_8c.html" target="source" name="SketchImage">SketchImage</a></h2>
515<div class="doc-section">
516
517<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>
518
519<p>The format of the SketchImage method is:</p>
520
521<pre class="code">
522 Image *SketchImage(const Image *image,const double radius,
523 const double sigma,const double angle,ExceptionInfo *exception)
524</pre>
525
526<p>A description of each parameter follows:</p></ol>
527
528<h5>image</h5>
529<ol><p>the image.</p></ol>
530
531<h5>radius</h5>
532<ol><p>the radius of the Gaussian, in pixels, not counting the center pixel.</p></ol>
533
534<h5>sigma</h5>
535<ol><p>the standard deviation of the Gaussian, in pixels.</p></ol>
536
537<h5>angle</h5>
cristyeaedf062010-05-29 22:36:02 +0000[diff] [blame]538<ol><p>Apply the effect along this angle.</p></ol>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]539
540<h5>exception</h5>
541<ol><p>return any errors or warnings in this structure.</p></ol>
542
543 </div>
544<h2><a href="http://www.imagemagick.org/api/MagickCore/fx
545_8c.html" target="source" name="SolarizeImage">SolarizeImage</a></h2>
546<div class="doc-section">
547
548<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>
549
550<p>The format of the SolarizeImage method is:</p>
551
552<pre class="code">
553 MagickBooleanType SolarizeImage(Image *image,const double threshold)
554</pre>
555
556<p>A description of each parameter follows:</p></ol>
557
558<h5>image</h5>
559<ol><p>the image.</p></ol>
560
561<h5>threshold</h5>
562<ol><p>Define the extent of the solarization.</p></ol>
563
564 </div>
565<h2><a href="http://www.imagemagick.org/api/MagickCore/fx
566_8c.html" target="source" name="SteganoImage">SteganoImage</a></h2>
567<div class="doc-section">
568
569<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>
570
571<p>The format of the SteganoImage method is:</p>
572
573<pre class="code">
574 Image *SteganoImage(const Image *image,Image *watermark,
575 ExceptionInfo *exception)
576</pre>
577
578<p>A description of each parameter follows:</p></ol>
579
580<h5>image</h5>
581<ol><p>the image.</p></ol>
582
583<h5>watermark</h5>
584<ol><p>the watermark image.</p></ol>
585
586<h5>exception</h5>
587<ol><p>return any errors or warnings in this structure.</p></ol>
588
589 </div>
590<h2><a href="http://www.imagemagick.org/api/MagickCore/fx
591_8c.html" target="source" name="StereoAnaglyphImage">StereoAnaglyphImage</a></h2>
592<div class="doc-section">
593
594<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>
595
596<p>The format of the StereoAnaglyphImage method is:</p>
597
598<pre class="code">
599 Image *StereoImage(const Image *left_image,const Image *right_image,
600 ExceptionInfo *exception)
601 Image *StereoAnaglyphImage(const Image *left_image,
cristybb503372010-05-27 20:51:26 +0000[diff] [blame]602 const Image *right_image,const ssize_t x_offset,const ssize_t y_offset,
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]603 ExceptionInfo *exception)
604</pre>
605
606<p>A description of each parameter follows:</p></ol>
607
608<h5>left_image</h5>
609<ol><p>the left image.</p></ol>
610
611<h5>right_image</h5>
612<ol><p>the right image.</p></ol>
613
614<h5>exception</h5>
615<ol><p>return any errors or warnings in this structure.</p></ol>
616
617<h5>x_offset</h5>
618<ol><p>amount, in pixels, by which the left image is offset to the right of the right image.</p></ol>
619
620<h5>y_offset</h5>
621<ol><p>amount, in pixels, by which the left image is offset to the bottom of the right image.</p></ol>
622
623
624 </div>
625<h2><a href="http://www.imagemagick.org/api/MagickCore/fx
626_8c.html" target="source" name="SwirlImage">SwirlImage</a></h2>
627<div class="doc-section">
628
629<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>
630
631<p>The format of the SwirlImage method is:</p>
632
633<pre class="code">
634 Image *SwirlImage(const Image *image,double degrees,
635 ExceptionInfo *exception)
636</pre>
637
638<p>A description of each parameter follows:</p></ol>
639
640<h5>image</h5>
641<ol><p>the image.</p></ol>
642
643<h5>degrees</h5>
644<ol><p>Define the tightness of the swirling effect.</p></ol>
645
646<h5>exception</h5>
647<ol><p>return any errors or warnings in this structure.</p></ol>
648
649 </div>
650<h2><a href="http://www.imagemagick.org/api/MagickCore/fx
651_8c.html" target="source" name="TintImage">TintImage</a></h2>
652<div class="doc-section">
653
654<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>
655
656<p>The format of the TintImage method is:</p>
657
658<pre class="code">
659 Image *TintImage(const Image *image,const char *opacity,
660 const PixelPacket tint,ExceptionInfo *exception)
661</pre>
662
663<p>A description of each parameter follows:</p></ol>
664
665<h5>image</h5>
666<ol><p>the image.</p></ol>
667
668<h5>opacity</h5>
669<ol><p>A color value used for tinting.</p></ol>
670
671<h5>tint</h5>
672<ol><p>A color value used for tinting.</p></ol>
673
674<h5>exception</h5>
675<ol><p>return any errors or warnings in this structure.</p></ol>
676
677 </div>
678<h2><a href="http://www.imagemagick.org/api/MagickCore/fx
679_8c.html" target="source" name="VignetteImage">VignetteImage</a></h2>
680<div class="doc-section">
681
682<p>VignetteImage() softens the edges of the image in vignette style.</p></ol>
683
684<p>The format of the VignetteImage method is:</p>
685
686<pre class="code">
687 Image *VignetteImage(const Image *image,const double radius,
cristybb503372010-05-27 20:51:26 +0000[diff] [blame]688 const double sigma,const ssize_t x,const ssize_t y,ExceptionInfo *exception)
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]689</pre>
690
691<p>A description of each parameter follows:</p></ol>
692
693<h5>image</h5>
694<ol><p>the image.</p></ol>
695
696<h5>radius</h5>
697<ol><p>the radius of the pixel neighborhood.</p></ol>
698
699<h5>sigma</h5>
700<ol><p>the standard deviation of the Gaussian, in pixels.</p></ol>
701
702<h5>x, y</h5>
703<ol><p>Define the x and y ellipse offset.</p></ol>
704
705<h5>exception</h5>
706<ol><p>return any errors or warnings in this structure.</p></ol>
707
708 </div>
709<h2><a href="http://www.imagemagick.org/api/MagickCore/fx
710_8c.html" target="source" name="WaveImage">WaveImage</a></h2>
711<div class="doc-section">
712
cristyeaedf062010-05-29 22:36:02 +0000[diff] [blame]713<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]714
715<p>The format of the WaveImage method is:</p>
716
717<pre class="code">
718 Image *WaveImage(const Image *image,const double amplitude,
719 const double wave_length,ExceptionInfo *exception)
720</pre>
721
722<p>A description of each parameter follows:</p></ol>
723
724<h5>image</h5>
725<ol><p>the image.</p></ol>
726
727<h5>amplitude, wave_length</h5>
728<ol><p>Define the amplitude and wave length of the sine wave.</p></ol>
729
730<h5>exception</h5>
731<ol><p>return any errors or warnings in this structure.</p></ol>
732
733 </div>
cristy3eaa0ef2010-03-06 20:35:26 +0000[diff] [blame]734
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