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196
197<div class="main">
198
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]199<h1>Module fx Methods</h1>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]200<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]201
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]202<h2><a href="http://www.imagemagick.org/api/MagickCore/fx_8c.html" id="AddNoiseImage">AddNoiseImage</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]203<div class="doc-section">
204
205<p>AddNoiseImage() adds random noise to the image.</p>
206
207<p>The format of the AddNoiseImage method is:</p>
208
209<pre class="code">
210 Image *AddNoiseImage(const Image *image,const NoiseType noise_type,
211 ExceptionInfo *exception)
212 Image *AddNoiseImageChannel(const Image *image,const ChannelType channel,
213 const NoiseType noise_type,ExceptionInfo *exception)
214</pre>
215
216<p>A description of each parameter follows:</p>
217
218<h5>image</h5>
219<p>the image.</p>
220
221<h5>channel</h5>
222<p>the channel type.</p>
223
224<h5>noise_type</h5>
225<p>The type of noise: Uniform, Gaussian, Multiplicative, Impulse, Laplacian, or Poisson.</p>
226
227<h5>exception</h5>
228<p>return any errors or warnings in this structure.</p>
229
230 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]231<h2><a href="http://www.imagemagick.org/api/MagickCore/fx_8c.html" id="BlueShiftImage">BlueShiftImage</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]232<div class="doc-section">
233
234<p>BlueShiftImage() mutes the colors of the image to simulate a scene at nighttime in the moonlight.</p>
235
236<p>The format of the BlueShiftImage method is:</p>
237
238<pre class="code">
239 Image *BlueShiftImage(const Image *image,const double factor,
240 ExceptionInfo *exception)
241</pre>
242
243<p>A description of each parameter follows:</p>
244
245<h5>image</h5>
246<p>the image.</p>
247
248<h5>factor</h5>
249<p>the shift factor.</p>
250
251<h5>exception</h5>
252<p>return any errors or warnings in this structure.</p>
253
254 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]255<h2><a href="http://www.imagemagick.org/api/MagickCore/fx_8c.html" id="CharcoalImage">CharcoalImage</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]256<div class="doc-section">
257
258<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>
259
260<p>The format of the CharcoalImage method is:</p>
261
262<pre class="code">
263 Image *CharcoalImage(const Image *image,const double radius,
264 const double sigma,ExceptionInfo *exception)
265</pre>
266
267<p>A description of each parameter follows:</p>
268
269<h5>image</h5>
270<p>the image.</p>
271
272<h5>radius</h5>
273<p>the radius of the pixel neighborhood.</p>
274
275<h5>sigma</h5>
276<p>the standard deviation of the Gaussian, in pixels.</p>
277
278<h5>exception</h5>
279<p>return any errors or warnings in this structure.</p>
280
281 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]282<h2><a href="http://www.imagemagick.org/api/MagickCore/fx_8c.html" id="ColorizeImage">ColorizeImage</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]283<div class="doc-section">
284
285<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>
286
287<p>The format of the ColorizeImage method is:</p>
288
289<pre class="code">
290 Image *ColorizeImage(const Image *image,const char *opacity,
291 const PixelPacket colorize,ExceptionInfo *exception)
292</pre>
293
294<p>A description of each parameter follows:</p>
295
296<h5>image</h5>
297<p>the image.</p>
298
299<h5>opacity</h5>
300<p>A character string indicating the level of opacity as a percentage.</p>
301
302<h5>colorize</h5>
303<p>A color value.</p>
304
305<h5>exception</h5>
306<p>return any errors or warnings in this structure.</p>
307
308 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]309<h2><a href="http://www.imagemagick.org/api/MagickCore/fx_8c.html" id="ColorMatrixImage">ColorMatrixImage</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]310<div class="doc-section">
311
312<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>
313
314<p>The format of the ColorMatrixImage method is:</p>
315
316<pre class="code">
317 Image *ColorMatrixImage(const Image *image,
318 const KernelInfo *color_matrix,ExceptionInfo *exception)
319</pre>
320
321<p>A description of each parameter follows:</p>
322
323<h5>image</h5>
324<p>the image.</p>
325
326<h5>color_matrix</h5>
327<p>the color matrix.</p>
328
329<h5>exception</h5>
330<p>return any errors or warnings in this structure.</p>
331
332 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]333<h2><a href="http://www.imagemagick.org/api/MagickCore/fx_8c.html" id="FxImage">FxImage</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]334<div class="doc-section">
335
336<p>FxImage() applies a mathematical expression to the specified image.</p>
337
338<p>The format of the FxImage method is:</p>
339
340<pre class="code">
341 Image *FxImage(const Image *image,const char *expression,
342 ExceptionInfo *exception)
343 Image *FxImageChannel(const Image *image,const ChannelType channel,
344 const char *expression,ExceptionInfo *exception)
345</pre>
346
347<p>A description of each parameter follows:</p>
348
349<h5>image</h5>
350<p>the image.</p>
351
352<h5>channel</h5>
353<p>the channel.</p>
354
355<h5>expression</h5>
356<p>A mathematical expression.</p>
357
358<h5>exception</h5>
359<p>return any errors or warnings in this structure.</p>
360
361 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]362<h2><a href="http://www.imagemagick.org/api/MagickCore/fx_8c.html" id="ImplodeImage">ImplodeImage</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]363<div class="doc-section">
364
365<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>
366
367<p>The format of the ImplodeImage method is:</p>
368
369<pre class="code">
370 Image *ImplodeImage(const Image *image,const double amount,
371 ExceptionInfo *exception)
372</pre>
373
374<p>A description of each parameter follows:</p>
375
376<h5>implode_image</h5>
377<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>
378
379<h5>image</h5>
380<p>the image.</p>
381
382<h5>amount</h5>
383<p>Define the extent of the implosion.</p>
384
385<h5>exception</h5>
386<p>return any errors or warnings in this structure.</p>
387
388 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]389<h2><a href="http://www.imagemagick.org/api/MagickCore/fx_8c.html" id="The_MorphImages">The MorphImages</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]390<div class="doc-section">
391
392<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>
393
394<p>The format of the MorphImage method is:</p>
395
396<pre class="code">
397 Image *MorphImages(const Image *image,const size_t number_frames,
398 ExceptionInfo *exception)
399</pre>
400
401<p>A description of each parameter follows:</p>
402
403<h5>image</h5>
404<p>the image.</p>
405
406<h5>number_frames</h5>
407<p>Define the number of in-between image to generate. The more in-between frames, the smoother the morph.</p>
408
409<h5>exception</h5>
410<p>return any errors or warnings in this structure.</p>
411
412 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]413<h2><a href="http://www.imagemagick.org/api/MagickCore/fx_8c.html" id="PlasmaImage">PlasmaImage</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]414<div class="doc-section">
415
416<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>
417
418<p>The format of the PlasmaImage method is:</p>
419
420<pre class="code">
421 MagickBooleanType PlasmaImage(Image *image,const SegmentInfo *segment,
422 size_t attenuate,size_t depth)
423</pre>
424
425<p>A description of each parameter follows:</p>
426
427<h5>image</h5>
428<p>the image.</p>
429
430<h5>segment</h5>
431<p> Define the region to apply plasma fractals values.</p>
432
433<h5>attenuate</h5>
434<p>Define the plasma attenuation factor.</p>
435
436<h5>depth</h5>
437<p>Limit the plasma recursion depth.</p>
438
439 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]440<h2><a href="http://www.imagemagick.org/api/MagickCore/fx_8c.html" id="PolaroidImage">PolaroidImage</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]441<div class="doc-section">
442
443<p>PolaroidImage() simulates a Polaroid picture.</p>
444
445<p>The format of the AnnotateImage method is:</p>
446
447<pre class="code">
448 Image *PolaroidImage(const Image *image,const DrawInfo *draw_info,
449 const double angle,ExceptionInfo exception)
450</pre>
451
452<p>A description of each parameter follows:</p>
453
454<h5>image</h5>
455<p>the image.</p>
456
457<h5>draw_info</h5>
458<p>the draw info.</p>
459
460<h5>angle</h5>
461<p>Apply the effect along this angle.</p>
462
463<h5>exception</h5>
464<p>return any errors or warnings in this structure.</p>
465
466 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]467<h2><a href="http://www.imagemagick.org/api/MagickCore/fx_8c.html" id="MagickSepiaToneImage">MagickSepiaToneImage</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]468<div class="doc-section">
469
470<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>
471
472<p>The format of the SepiaToneImage method is:</p>
473
474<pre class="code">
475 Image *SepiaToneImage(const Image *image,const double threshold,
476 ExceptionInfo *exception)
477</pre>
478
479<p>A description of each parameter follows:</p>
480
481<h5>image</h5>
482<p>the image.</p>
483
484<h5>threshold</h5>
485<p>the tone threshold.</p>
486
487<h5>exception</h5>
488<p>return any errors or warnings in this structure.</p>
489
490 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]491<h2><a href="http://www.imagemagick.org/api/MagickCore/fx_8c.html" id="ShadowImage">ShadowImage</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]492<div class="doc-section">
493
494<p>ShadowImage() simulates a shadow from the specified image and returns it.</p>
495
496<p>The format of the ShadowImage method is:</p>
497
498<pre class="code">
499 Image *ShadowImage(const Image *image,const double opacity,
500 const double sigma,const ssize_t x_offset,const ssize_t y_offset,
501 ExceptionInfo *exception)
502</pre>
503
504<p>A description of each parameter follows:</p>
505
506<h5>image</h5>
507<p>the image.</p>
508
509<h5>opacity</h5>
510<p>percentage transparency.</p>
511
512<h5>sigma</h5>
513<p>the standard deviation of the Gaussian, in pixels.</p>
514
515<h5>x_offset</h5>
516<p>the shadow x-offset.</p>
517
518<h5>y_offset</h5>
519<p>the shadow y-offset.</p>
520
521<h5>exception</h5>
522<p>return any errors or warnings in this structure.</p>
523
524 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]525<h2><a href="http://www.imagemagick.org/api/MagickCore/fx_8c.html" id="SketchImage">SketchImage</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]526<div class="doc-section">
527
528<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>
529
530<p>The format of the SketchImage method is:</p>
531
532<pre class="code">
533 Image *SketchImage(const Image *image,const double radius,
534 const double sigma,const double angle,ExceptionInfo *exception)
535</pre>
536
537<p>A description of each parameter follows:</p>
538
539<h5>image</h5>
540<p>the image.</p>
541
542<h5>radius</h5>
543<p>the radius of the Gaussian, in pixels, not counting the center pixel.</p>
544
545<h5>sigma</h5>
546<p>the standard deviation of the Gaussian, in pixels.</p>
547
548<h5>angle</h5>
549<p>Apply the effect along this angle.</p>
550
551<h5>exception</h5>
552<p>return any errors or warnings in this structure.</p>
553
554 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]555<h2><a href="http://www.imagemagick.org/api/MagickCore/fx_8c.html" id="SolarizeImage">SolarizeImage</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]556<div class="doc-section">
557
558<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>
559
560<p>The format of the SolarizeImage method is:</p>
561
562<pre class="code">
563 MagickBooleanType SolarizeImage(Image *image,const double threshold)
564</pre>
565
566<p>A description of each parameter follows:</p>
567
568<h5>image</h5>
569<p>the image.</p>
570
571<h5>threshold</h5>
572<p>Define the extent of the solarization.</p>
573
574 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]575<h2><a href="http://www.imagemagick.org/api/MagickCore/fx_8c.html" id="SteganoImage">SteganoImage</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]576<div class="doc-section">
577
578<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>
579
580<p>The format of the SteganoImage method is:</p>
581
582<pre class="code">
583 Image *SteganoImage(const Image *image,Image *watermark,
584 ExceptionInfo *exception)
585</pre>
586
587<p>A description of each parameter follows:</p>
588
589<h5>image</h5>
590<p>the image.</p>
591
592<h5>watermark</h5>
593<p>the watermark image.</p>
594
595<h5>exception</h5>
596<p>return any errors or warnings in this structure.</p>
597
598 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]599<h2><a href="http://www.imagemagick.org/api/MagickCore/fx_8c.html" id="StereoAnaglyphImage">StereoAnaglyphImage</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]600<div class="doc-section">
601
602<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>
603
604<p>The format of the StereoAnaglyphImage method is:</p>
605
606<pre class="code">
607 Image *StereoImage(const Image *left_image,const Image *right_image,
608 ExceptionInfo *exception)
609 Image *StereoAnaglyphImage(const Image *left_image,
610 const Image *right_image,const ssize_t x_offset,const ssize_t y_offset,
611 ExceptionInfo *exception)
612</pre>
613
614<p>A description of each parameter follows:</p>
615
616<h5>left_image</h5>
617<p>the left image.</p>
618
619<h5>right_image</h5>
620<p>the right image.</p>
621
622<h5>exception</h5>
623<p>return any errors or warnings in this structure.</p>
624
625<h5>x_offset</h5>
626<p>amount, in pixels, by which the left image is offset to the right of the right image.</p>
627
628<h5>y_offset</h5>
629<p>amount, in pixels, by which the left image is offset to the bottom of the right image.</p>
630
631
632 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]633<h2><a href="http://www.imagemagick.org/api/MagickCore/fx_8c.html" id="SwirlImage">SwirlImage</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]634<div class="doc-section">
635
636<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>
637
638<p>The format of the SwirlImage method is:</p>
639
640<pre class="code">
641 Image *SwirlImage(const Image *image,double degrees,
642 ExceptionInfo *exception)
643</pre>
644
645<p>A description of each parameter follows:</p>
646
647<h5>image</h5>
648<p>the image.</p>
649
650<h5>degrees</h5>
651<p>Define the tightness of the swirling effect.</p>
652
653<h5>exception</h5>
654<p>return any errors or warnings in this structure.</p>
655
656 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]657<h2><a href="http://www.imagemagick.org/api/MagickCore/fx_8c.html" id="TintImage">TintImage</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]658<div class="doc-section">
659
660<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>
661
662<p>The format of the TintImage method is:</p>
663
664<pre class="code">
665 Image *TintImage(const Image *image,const char *opacity,
666 const PixelPacket tint,ExceptionInfo *exception)
667</pre>
668
669<p>A description of each parameter follows:</p>
670
671<h5>image</h5>
672<p>the image.</p>
673
674<h5>opacity</h5>
675<p>A color value used for tinting.</p>
676
677<h5>tint</h5>
678<p>A color value used for tinting.</p>
679
680<h5>exception</h5>
681<p>return any errors or warnings in this structure.</p>
682
683 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]684<h2><a href="http://www.imagemagick.org/api/MagickCore/fx_8c.html" id="VignetteImage">VignetteImage</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]685<div class="doc-section">
686
687<p>VignetteImage() softens the edges of the image in vignette style.</p>
688
689<p>The format of the VignetteImage method is:</p>
690
691<pre class="code">
692 Image *VignetteImage(const Image *image,const double radius,
693 const double sigma,const ssize_t x,const ssize_t y,ExceptionInfo *exception)
694</pre>
695
696<p>A description of each parameter follows:</p>
697
698<h5>image</h5>
699<p>the image.</p>
700
701<h5>radius</h5>
702<p>the radius of the pixel neighborhood.</p>
703
704<h5>sigma</h5>
705<p>the standard deviation of the Gaussian, in pixels.</p>
706
707<h5>x, y</h5>
708<p>Define the x and y ellipse offset.</p>
709
710<h5>exception</h5>
711<p>return any errors or warnings in this structure.</p>
712
713 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]714<h2><a href="http://www.imagemagick.org/api/MagickCore/fx_8c.html" id="WaveImage">WaveImage</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]715<div class="doc-section">
716
717<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>
718
719<p>The format of the WaveImage method is:</p>
720
721<pre class="code">
722 Image *WaveImage(const Image *image,const double amplitude,
723 const double wave_length,ExceptionInfo *exception)
724</pre>
725
726<p>A description of each parameter follows:</p>
727
728<h5>image</h5>
729<p>the image.</p>
730
731<h5>amplitude, wave_length</h5>
732<p>Define the amplitude and wave length of the sine wave.</p>
733
734<h5>exception</h5>
735<p>return any errors or warnings in this structure.</p>
736
737 </div>
cristy3eaa0ef2010-03-06 20:35:26 +0000[diff] [blame]738
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