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175<div class="main">
176
cristy307ba182010-12-25 01:00:34 +0000[diff] [blame]177<h1>Module fx
178 Methods</h1>
cristy0291e2d2010-04-04 17:50:18 +0000[diff] [blame]179<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]180
181<h2><a href="http://www.imagemagick.org/api/MagickCore/fx
182_8c.html" target="source" name="AddNoiseImage">AddNoiseImage</a></h2>
183<div class="doc-section">
184
185<p>AddNoiseImage() adds random noise to the image.</p></ol>
186
187<p>The format of the AddNoiseImage method is:</p>
188
189<pre class="code">
190 Image *AddNoiseImage(const Image *image,const NoiseType noise_type,
191 ExceptionInfo *exception)
192 Image *AddNoiseImageChannel(const Image *image,const ChannelType channel,
193 const NoiseType noise_type,ExceptionInfo *exception)
194</pre>
195
196<p>A description of each parameter follows:</p></ol>
197
198<h5>image</h5>
199<ol><p>the image.</p></ol>
200
201<h5>channel</h5>
202<ol><p>the channel type.</p></ol>
203
204<h5>noise_type</h5>
205<ol><p>The type of noise: Uniform, Gaussian, Multiplicative, Impulse, Laplacian, or Poisson.</p></ol>
206
207<h5>exception</h5>
208<ol><p>return any errors or warnings in this structure.</p></ol>
209
210 </div>
211<h2><a href="http://www.imagemagick.org/api/MagickCore/fx
212_8c.html" target="source" name="BlueShiftImage">BlueShiftImage</a></h2>
213<div class="doc-section">
214
215<p>BlueShiftImage() mutes the colors of the image to simulate a scene at nighttime in the moonlight.</p></ol>
216
217<p>The format of the BlueShiftImage method is:</p>
218
219<pre class="code">
220 Image *BlueShiftImage(const Image *image,const double factor,
221 ExceptionInfo *exception)
222</pre>
223
224<p>A description of each parameter follows:</p></ol>
225
226<h5>image</h5>
227<ol><p>the image.</p></ol>
228
229<h5>factor</h5>
230<ol><p>the shift factor.</p></ol>
231
232<h5>exception</h5>
233<ol><p>return any errors or warnings in this structure.</p></ol>
234
235 </div>
236<h2><a href="http://www.imagemagick.org/api/MagickCore/fx
237_8c.html" target="source" name="CharcoalImage">CharcoalImage</a></h2>
238<div class="doc-section">
239
240<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>
241
242<p>The format of the CharcoalImage method is:</p>
243
244<pre class="code">
245 Image *CharcoalImage(const Image *image,const double radius,
246 const double sigma,ExceptionInfo *exception)
247</pre>
248
249<p>A description of each parameter follows:</p></ol>
250
251<h5>image</h5>
252<ol><p>the image.</p></ol>
253
254<h5>radius</h5>
255<ol><p>the radius of the pixel neighborhood.</p></ol>
256
257<h5>sigma</h5>
258<ol><p>the standard deviation of the Gaussian, in pixels.</p></ol>
259
260<h5>exception</h5>
261<ol><p>return any errors or warnings in this structure.</p></ol>
262
263 </div>
264<h2><a href="http://www.imagemagick.org/api/MagickCore/fx
265_8c.html" target="source" name="ColorizeImage">ColorizeImage</a></h2>
266<div class="doc-section">
267
268<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>
269
270<p>The format of the ColorizeImage method is:</p>
271
272<pre class="code">
273 Image *ColorizeImage(const Image *image,const char *opacity,
274 const PixelPacket colorize,ExceptionInfo *exception)
275</pre>
276
277<p>A description of each parameter follows:</p></ol>
278
279<h5>image</h5>
280<ol><p>the image.</p></ol>
281
282<h5>opacity</h5>
283<ol><p>A character string indicating the level of opacity as a percentage.</p></ol>
284
285<h5>colorize</h5>
286<ol><p>A color value.</p></ol>
287
288<h5>exception</h5>
289<ol><p>return any errors or warnings in this structure.</p></ol>
290
291 </div>
292<h2><a href="http://www.imagemagick.org/api/MagickCore/fx
cristy0291e2d2010-04-04 17:50:18 +0000[diff] [blame]293_8c.html" target="source" name="ColorMatrixImage">ColorMatrixImage</a></h2>
294<div class="doc-section">
295
296<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>
297
298<p>The format of the ColorMatrixImage method is:</p>
299
300<pre class="code">
301 Image *ColorMatrixImage(const Image *image,
302 const KernelInfo *color_matrix,ExceptionInfo *exception)
303</pre>
304
305<p>A description of each parameter follows:</p></ol>
306
307<h5>image</h5>
308<ol><p>the image.</p></ol>
309
310<h5>color_matrix</h5>
311<ol><p>the color matrix.</p></ol>
312
313<h5>exception</h5>
314<ol><p>return any errors or warnings in this structure.</p></ol>
315
316 </div>
317<h2><a href="http://www.imagemagick.org/api/MagickCore/fx
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]318_8c.html" target="source" name="FxImage">FxImage</a></h2>
319<div class="doc-section">
320
321<p>FxImage() applies a mathematical expression to the specified image.</p></ol>
322
323<p>The format of the FxImage method is:</p>
324
325<pre class="code">
326 Image *FxImage(const Image *image,const char *expression,
327 ExceptionInfo *exception)
328 Image *FxImageChannel(const Image *image,const ChannelType channel,
329 const char *expression,ExceptionInfo *exception)
330</pre>
331
332<p>A description of each parameter follows:</p></ol>
333
334<h5>image</h5>
335<ol><p>the image.</p></ol>
336
337<h5>channel</h5>
338<ol><p>the channel.</p></ol>
339
340<h5>expression</h5>
341<ol><p>A mathematical expression.</p></ol>
342
343<h5>exception</h5>
344<ol><p>return any errors or warnings in this structure.</p></ol>
345
346 </div>
347<h2><a href="http://www.imagemagick.org/api/MagickCore/fx
348_8c.html" target="source" name="ImplodeImage">ImplodeImage</a></h2>
349<div class="doc-section">
350
351<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>
352
353<p>The format of the ImplodeImage method is:</p>
354
355<pre class="code">
356 Image *ImplodeImage(const Image *image,const double amount,
357 ExceptionInfo *exception)
358</pre>
359
360<p>A description of each parameter follows:</p></ol>
361
362<h5>implode_image</h5>
363<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>
364
365<h5>image</h5>
366<ol><p>the image.</p></ol>
367
368<h5>amount</h5>
369<ol><p>Define the extent of the implosion.</p></ol>
370
371<h5>exception</h5>
372<ol><p>return any errors or warnings in this structure.</p></ol>
373
374 </div>
375<h2><a href="http://www.imagemagick.org/api/MagickCore/fx
376_8c.html" target="source" name="The MorphImages">The MorphImages</a></h2>
377<div class="doc-section">
378
379<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>
380
381<p>The format of the MorphImage method is:</p>
382
383<pre class="code">
cristybb503372010-05-27 20:51:26 +0000[diff] [blame]384 Image *MorphImages(const Image *image,const size_t number_frames,
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]385 ExceptionInfo *exception)
386</pre>
387
388<p>A description of each parameter follows:</p></ol>
389
390<h5>image</h5>
391<ol><p>the image.</p></ol>
392
393<h5>number_frames</h5>
394<ol><p>Define the number of in-between image to generate. The more in-between frames, the smoother the morph.</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/fx
401_8c.html" target="source" name="PlasmaImage">PlasmaImage</a></h2>
402<div class="doc-section">
403
404<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>
405
406<p>The format of the PlasmaImage method is:</p>
407
408<pre class="code">
409 MagickBooleanType PlasmaImage(Image *image,const SegmentInfo *segment,
cristybb503372010-05-27 20:51:26 +0000[diff] [blame]410 size_t attenuate,size_t depth)
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>segment</h5>
419<ol><p> Define the region to apply plasma fractals values.</p></ol>
420
421<h5>attenuate</h5>
cristy8030a5b2010-09-17 18:31:49 +0000[diff] [blame]422<ol><p>Define the plasma attenuation factor.</p></ol>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]423
424<h5>depth</h5>
425<ol><p>Limit the plasma recursion depth.</p></ol>
426
427 </div>
428<h2><a href="http://www.imagemagick.org/api/MagickCore/fx
429_8c.html" target="source" name="PolaroidImage">PolaroidImage</a></h2>
430<div class="doc-section">
431
432<p>PolaroidImage() simulates a Polaroid picture.</p></ol>
433
434<p>The format of the AnnotateImage method is:</p>
435
436<pre class="code">
437 Image *PolaroidImage(const Image *image,const DrawInfo *draw_info,
438 const double angle,ExceptionInfo exception)
439</pre>
440
441<p>A description of each parameter follows:</p></ol>
442
443<h5>image</h5>
444<ol><p>the image.</p></ol>
445
446<h5>draw_info</h5>
447<ol><p>the draw info.</p></ol>
448
449<h5>angle</h5>
cristyeaedf062010-05-29 22:36:02 +0000[diff] [blame]450<ol><p>Apply the effect along this angle.</p></ol>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]451
452<h5>exception</h5>
453<ol><p>return any errors or warnings in this structure.</p></ol>
454
455 </div>
456<h2><a href="http://www.imagemagick.org/api/MagickCore/fx
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]457_8c.html" target="source" name="MagickSepiaToneImage">MagickSepiaToneImage</a></h2>
458<div class="doc-section">
459
460<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>
461
462<p>The format of the SepiaToneImage method is:</p>
463
464<pre class="code">
465 Image *SepiaToneImage(const Image *image,const double threshold,
466 ExceptionInfo *exception)
467</pre>
468
469<p>A description of each parameter follows:</p></ol>
470
471<h5>image</h5>
472<ol><p>the image.</p></ol>
473
474<h5>threshold</h5>
475<ol><p>the tone threshold.</p></ol>
476
477<h5>exception</h5>
478<ol><p>return any errors or warnings in this structure.</p></ol>
479
480 </div>
481<h2><a href="http://www.imagemagick.org/api/MagickCore/fx
482_8c.html" target="source" name="ShadowImage">ShadowImage</a></h2>
483<div class="doc-section">
484
485<p>ShadowImage() simulates a shadow from the specified image and returns it.</p></ol>
486
487<p>The format of the ShadowImage method is:</p>
488
489<pre class="code">
490 Image *ShadowImage(const Image *image,const double opacity,
cristybb503372010-05-27 20:51:26 +0000[diff] [blame]491 const double sigma,const ssize_t x_offset,const ssize_t y_offset,
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]492 ExceptionInfo *exception)
493</pre>
494
495<p>A description of each parameter follows:</p></ol>
496
497<h5>image</h5>
498<ol><p>the image.</p></ol>
499
500<h5>opacity</h5>
501<ol><p>percentage transparency.</p></ol>
502
503<h5>sigma</h5>
504<ol><p>the standard deviation of the Gaussian, in pixels.</p></ol>
505
506<h5>x_offset</h5>
507<ol><p>the shadow x-offset.</p></ol>
508
509<h5>y_offset</h5>
510<ol><p>the shadow y-offset.</p></ol>
511
512<h5>exception</h5>
513<ol><p>return any errors or warnings in this structure.</p></ol>
514
515 </div>
516<h2><a href="http://www.imagemagick.org/api/MagickCore/fx
517_8c.html" target="source" name="SketchImage">SketchImage</a></h2>
518<div class="doc-section">
519
520<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>
521
522<p>The format of the SketchImage method is:</p>
523
524<pre class="code">
525 Image *SketchImage(const Image *image,const double radius,
526 const double sigma,const double angle,ExceptionInfo *exception)
527</pre>
528
529<p>A description of each parameter follows:</p></ol>
530
531<h5>image</h5>
532<ol><p>the image.</p></ol>
533
534<h5>radius</h5>
535<ol><p>the radius of the Gaussian, in pixels, not counting the center pixel.</p></ol>
536
537<h5>sigma</h5>
538<ol><p>the standard deviation of the Gaussian, in pixels.</p></ol>
539
540<h5>angle</h5>
cristyeaedf062010-05-29 22:36:02 +0000[diff] [blame]541<ol><p>Apply the effect along this angle.</p></ol>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]542
543<h5>exception</h5>
544<ol><p>return any errors or warnings in this structure.</p></ol>
545
546 </div>
547<h2><a href="http://www.imagemagick.org/api/MagickCore/fx
548_8c.html" target="source" name="SolarizeImage">SolarizeImage</a></h2>
549<div class="doc-section">
550
551<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>
552
553<p>The format of the SolarizeImage method is:</p>
554
555<pre class="code">
556 MagickBooleanType SolarizeImage(Image *image,const double threshold)
557</pre>
558
559<p>A description of each parameter follows:</p></ol>
560
561<h5>image</h5>
562<ol><p>the image.</p></ol>
563
564<h5>threshold</h5>
565<ol><p>Define the extent of the solarization.</p></ol>
566
567 </div>
568<h2><a href="http://www.imagemagick.org/api/MagickCore/fx
569_8c.html" target="source" name="SteganoImage">SteganoImage</a></h2>
570<div class="doc-section">
571
572<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>
573
574<p>The format of the SteganoImage method is:</p>
575
576<pre class="code">
577 Image *SteganoImage(const Image *image,Image *watermark,
578 ExceptionInfo *exception)
579</pre>
580
581<p>A description of each parameter follows:</p></ol>
582
583<h5>image</h5>
584<ol><p>the image.</p></ol>
585
586<h5>watermark</h5>
587<ol><p>the watermark image.</p></ol>
588
589<h5>exception</h5>
590<ol><p>return any errors or warnings in this structure.</p></ol>
591
592 </div>
593<h2><a href="http://www.imagemagick.org/api/MagickCore/fx
594_8c.html" target="source" name="StereoAnaglyphImage">StereoAnaglyphImage</a></h2>
595<div class="doc-section">
596
597<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>
598
599<p>The format of the StereoAnaglyphImage method is:</p>
600
601<pre class="code">
602 Image *StereoImage(const Image *left_image,const Image *right_image,
603 ExceptionInfo *exception)
604 Image *StereoAnaglyphImage(const Image *left_image,
cristybb503372010-05-27 20:51:26 +0000[diff] [blame]605 const Image *right_image,const ssize_t x_offset,const ssize_t y_offset,
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]606 ExceptionInfo *exception)
607</pre>
608
609<p>A description of each parameter follows:</p></ol>
610
611<h5>left_image</h5>
612<ol><p>the left image.</p></ol>
613
614<h5>right_image</h5>
615<ol><p>the right image.</p></ol>
616
617<h5>exception</h5>
618<ol><p>return any errors or warnings in this structure.</p></ol>
619
620<h5>x_offset</h5>
621<ol><p>amount, in pixels, by which the left image is offset to the right of the right image.</p></ol>
622
623<h5>y_offset</h5>
624<ol><p>amount, in pixels, by which the left image is offset to the bottom of the right image.</p></ol>
625
626
627 </div>
628<h2><a href="http://www.imagemagick.org/api/MagickCore/fx
629_8c.html" target="source" name="SwirlImage">SwirlImage</a></h2>
630<div class="doc-section">
631
632<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>
633
634<p>The format of the SwirlImage method is:</p>
635
636<pre class="code">
637 Image *SwirlImage(const Image *image,double degrees,
638 ExceptionInfo *exception)
639</pre>
640
641<p>A description of each parameter follows:</p></ol>
642
643<h5>image</h5>
644<ol><p>the image.</p></ol>
645
646<h5>degrees</h5>
647<ol><p>Define the tightness of the swirling effect.</p></ol>
648
649<h5>exception</h5>
650<ol><p>return any errors or warnings in this structure.</p></ol>
651
652 </div>
653<h2><a href="http://www.imagemagick.org/api/MagickCore/fx
654_8c.html" target="source" name="TintImage">TintImage</a></h2>
655<div class="doc-section">
656
657<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>
658
659<p>The format of the TintImage method is:</p>
660
661<pre class="code">
662 Image *TintImage(const Image *image,const char *opacity,
663 const PixelPacket tint,ExceptionInfo *exception)
664</pre>
665
666<p>A description of each parameter follows:</p></ol>
667
668<h5>image</h5>
669<ol><p>the image.</p></ol>
670
671<h5>opacity</h5>
672<ol><p>A color value used for tinting.</p></ol>
673
674<h5>tint</h5>
675<ol><p>A color value used for tinting.</p></ol>
676
677<h5>exception</h5>
678<ol><p>return any errors or warnings in this structure.</p></ol>
679
680 </div>
681<h2><a href="http://www.imagemagick.org/api/MagickCore/fx
682_8c.html" target="source" name="VignetteImage">VignetteImage</a></h2>
683<div class="doc-section">
684
685<p>VignetteImage() softens the edges of the image in vignette style.</p></ol>
686
687<p>The format of the VignetteImage method is:</p>
688
689<pre class="code">
690 Image *VignetteImage(const Image *image,const double radius,
cristybb503372010-05-27 20:51:26 +0000[diff] [blame]691 const double sigma,const ssize_t x,const ssize_t y,ExceptionInfo *exception)
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]692</pre>
693
694<p>A description of each parameter follows:</p></ol>
695
696<h5>image</h5>
697<ol><p>the image.</p></ol>
698
699<h5>radius</h5>
700<ol><p>the radius of the pixel neighborhood.</p></ol>
701
702<h5>sigma</h5>
703<ol><p>the standard deviation of the Gaussian, in pixels.</p></ol>
704
705<h5>x, y</h5>
706<ol><p>Define the x and y ellipse offset.</p></ol>
707
708<h5>exception</h5>
709<ol><p>return any errors or warnings in this structure.</p></ol>
710
711 </div>
712<h2><a href="http://www.imagemagick.org/api/MagickCore/fx
713_8c.html" target="source" name="WaveImage">WaveImage</a></h2>
714<div class="doc-section">
715
cristyeaedf062010-05-29 22:36:02 +0000[diff] [blame]716<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]717
718<p>The format of the WaveImage method is:</p>
719
720<pre class="code">
721 Image *WaveImage(const Image *image,const double amplitude,
722 const double wave_length,ExceptionInfo *exception)
723</pre>
724
725<p>A description of each parameter follows:</p></ol>
726
727<h5>image</h5>
728<ol><p>the image.</p></ol>
729
730<h5>amplitude, wave_length</h5>
731<ol><p>Define the amplitude and wave length of the sine wave.</p></ol>
732
733<h5>exception</h5>
734<ol><p>return any errors or warnings in this structure.</p></ol>
735
736 </div>
cristy3eaa0ef2010-03-06 20:35:26 +0000[diff] [blame]737
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