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gerrit-public.fairphone.software / platform / external / ImageMagick / 7c0ad764b61525786ae18bdc418a02c2482143e1 / . / www / api / fx.html
blob: df2bf5180e0fae4d05a79a8f07a05514c96dfae9 [file] [log] [blame]
cristy06f63f22012-10-31 00:50:07 +0000[diff] [blame]1<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
2 "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
3<html version="-//W3C//DTD XHTML 1.1//EN"
4 xmlns="http://www.w3.org/1999/xhtml" xml:lang="en"
5 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
6 xsi:schemaLocation="http://www.w3.org/1999/xhtml
7 http://www.w3.org/MarkUp/SCHEMA/xhtml11.xsd">
8<head>
9 <meta http-equiv="content-type" content="text/html; charset=UTF-8"/>
10 <meta name="google-site-verification" content="MxsMq6bdLOx0KSuz1MY6yG9ZTIJ7_7DVRfl5NCAT5Yg"/>
cristyffb69ed2010-12-25 00:06:48 +0000[diff] [blame]11 <title>ImageMagick: MagickCore, C API for ImageMagick: Add a Special Effect</title>
cristy751980d2012-06-03 23:18:35 +0000[diff] [blame]12 <meta http-equiv="content-language" content="en-US"/>
13 <meta http-equiv="content-type" content="text/html; charset=utf-8"/>
14 <meta http-equiv="reply-to" content="magick-users@imagemagick.org"/>
15 <meta name="application-name" content="ImageMagick"/>
16 <meta name="description" content="Use ImageMagick to convert, edit, or compose bitmap images in a variety of formats. In addition resize, rotate, shear, distort and transform images automagically."/>
17 <meta name="application-url" content="http://www.imagemagick.org"/>
18 <meta name="generator" content="PHP"/>
19 <meta name="keywords" content="magickcore, c, api, for, imagemagick:, add, a, special, effect, ImageMagick, PerlMagick, image processing, OpenMP, software development library, image, photo, software, Magick++, MagickWand"/>
20 <meta name="rating" content="GENERAL"/>
21 <meta name="robots" content="INDEX, FOLLOW"/>
22 <meta name="generator" content="ImageMagick Studio LLC"/>
23 <meta name="author" content="ImageMagick Studio LLC"/>
24 <meta name="revisit-after" content="2 DAYS"/>
25 <meta name="resource-type" content="document"/>
26 <meta name="copyright" content="Copyright (c) 1999-2012 ImageMagick Studio LLC"/>
27 <meta name="distribution" content="Global"/>
cristy99084a42012-08-04 16:51:41 +0000[diff] [blame]28 <link rel="icon" href="../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../images/wand.png"/>
29 <link rel="shortcut icon" href="../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../images/wand.ico" type="images/x-icon"/>
cristy06f63f22012-10-31 00:50:07 +0000[diff] [blame]30 <link rel="canonical" href="http://www.imagemagick.org" />
31 <link rel="meta" type="application/rdf+xml" title="ICI" href="http://imagemagick.org/ici.rdf"/>
32 <!-- Add jQuery library -->
33 <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.7/jquery.min.js"></script>
34
35 <!-- Optionaly include easing and/or mousewheel plugins -->
36 <script type="text/javascript" src="http://www.imagemagick.org/fancybox/jquery.easing-1.3.pack.js"></script>
37 <script type="text/javascript" src="http://www.imagemagick.org/fancybox/jquery.mousewheel-3.0.6.pack.js"></script>
38
39 <!-- Add fancyBox -->
40 <link rel="stylesheet" href="http://www.imagemagick.org/fancybox/jquery.fancybox.css?v=2.0.4" type="text/css" media="screen" />
41 <script type="text/javascript" src="http://www.imagemagick.org/fancybox/jquery.fancybox.pack.js?v=2.0.4"></script>
42
43 <!-- Optionaly include button and/or thumbnail helpers -->
44 <link rel="stylesheet" href="http://www.imagemagick.org/fancybox/helpers/jquery.fancybox-buttons.css?v=2.0.4" type="text/css" media="screen" />
45 <script type="text/javascript" src="http://www.imagemagick.org/fancybox/helpers/jquery.fancybox-buttons.js?v=2.0.4"></script>
46
47 <link rel="stylesheet" href="http://www.imagemagick.org/fancybox/helpers/jquery.fancybox-thumbs.css?v=2.0.4" type="text/css" media="screen" />
48 <script type="text/javascript" src="http://www.imagemagick.org/fancybox/helpers/jquery.fancybox-thumbs.js?v=2.0.4"></script>
49 <script type="text/javascript">
50 $(document).ready(function() {
51 $(".fancybox").fancybox();
52 });
53 </script>
54 <!-- ImageMagick style -->
55 <link rel="stylesheet" href="http://www.google.com/cse/style/look/default.css" type="text/css" />
56 <style type="text/css" media="all">
57 @import url("../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../www/magick.css");
58 </style>
59</head>
60
61<body id="www-imagemagick-org">
62<div class="titlebar">
63<div style="margin: 17px auto; float: left;">
64 <script type="text/javascript">
65 <!--
66 google_ad_client = "pub-3129977114552745";
67 google_ad_slot = "5439289906";
68 google_ad_width = 728;
69 google_ad_height = 90;
70 //-->
71 </script>
72 <script type="text/javascript"
73 src="http://pagead2.googlesyndication.com/pagead/show_ads.js">
74 </script>
75</div>
76<a href="../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../discourse-server">
77 <img src="../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../images/logo.jpg"
78 alt="ImageMagick Logo"
79 style="width: 123px; height: 118px; border: 0px; float: right;" /></a>
80<a href="../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../index.html">
81 <img src="../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../images/sprite.jpg"
82 alt="ImageMagick Sprite"
83 style="width: 114px; height: 118px; border: 0px; float: right;" /></a>
84</div>
85
86<div class="westbar">
87
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]88<div class="menu">
cristy99084a42012-08-04 16:51:41 +0000[diff] [blame]89 <a title="About ImageMagick" href="../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../index.html">About ImageMagick</a>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]90</div>
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94<div class="sub">
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110<div class="sub">
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113<div class="sub">
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116<div class="sub">
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122<div class="sub">
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125<div class="sub">
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128<div class="sub">
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131<div class="sub">
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138<div class="sub">
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cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]143 </div>
144<div class="menu">
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238
cristy20398432011-08-11 01:31:50 +0000[diff] [blame]239<h1>Module fx Methods</h1>
cristy751980d2012-06-03 23:18:35 +0000[diff] [blame]240<p class="navigation-index">[<a href="fx.html#AddNoiseImage">AddNoiseImage</a> &bull; <a href="fx.html#BlueShiftImage">BlueShiftImage</a> &bull; <a href="fx.html#CharcoalImage">CharcoalImage</a> &bull; <a href="fx.html#ColorizeImage">ColorizeImage</a> &bull; <a href="fx.html#ColorMatrixImage">ColorMatrixImage</a> &bull; <a href="fx.html#FxImage">FxImage</a> &bull; <a href="fx.html#ImplodeImage">ImplodeImage</a> &bull; <a href="fx.html#The MorphImages">The MorphImages</a> &bull; <a href="fx.html#PlasmaImage">PlasmaImage</a> &bull; <a href="fx.html#PolaroidImage">PolaroidImage</a> &bull; <a href="fx.html#MagickSepiaToneImage">MagickSepiaToneImage</a> &bull; <a href="fx.html#ShadowImage">ShadowImage</a> &bull; <a href="fx.html#SketchImage">SketchImage</a> &bull; <a href="fx.html#SolarizeImage">SolarizeImage</a> &bull; <a href="fx.html#SteganoImage">SteganoImage</a> &bull; <a href="fx.html#StereoAnaglyphImage">StereoAnaglyphImage</a> &bull; <a href="fx.html#SwirlImage">SwirlImage</a> &bull; <a href="fx.html#TintImage">TintImage</a> &bull; <a href="fx.html#VignetteImage">VignetteImage</a> &bull; <a href="fx.html#WaveImage">WaveImage</a>]</p>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]241
cristy20398432011-08-11 01:31:50 +0000[diff] [blame]242<h2><a href="http://www.imagemagick.org/api/MagickCore/fx_8c.html" id="AddNoiseImage">AddNoiseImage</a></h2>
243<div class="doc-section">
244
245<p>AddNoiseImage() adds random noise to the image.</p>
246
247<p>The format of the AddNoiseImage method is:</p>
248
249<pre class="code">
250 Image *AddNoiseImage(const Image *image,const NoiseType noise_type,
251 ExceptionInfo *exception)
252 Image *AddNoiseImageChannel(const Image *image,const ChannelType channel,
253 const NoiseType noise_type,ExceptionInfo *exception)
254</pre>
255
256<p>A description of each parameter follows:</p>
257
258<h5>image</h5>
259<p>the image.</p>
260
261<h5>channel</h5>
262<p>the channel type.</p>
263
264<h5>noise_type</h5>
265<p>The type of noise: Uniform, Gaussian, Multiplicative, Impulse, Laplacian, or Poisson.</p>
266
267<h5>exception</h5>
268<p>return any errors or warnings in this structure.</p>
269
270 </div>
271<h2><a href="http://www.imagemagick.org/api/MagickCore/fx_8c.html" id="BlueShiftImage">BlueShiftImage</a></h2>
272<div class="doc-section">
273
274<p>BlueShiftImage() mutes the colors of the image to simulate a scene at nighttime in the moonlight.</p>
275
276<p>The format of the BlueShiftImage method is:</p>
277
278<pre class="code">
279 Image *BlueShiftImage(const Image *image,const double factor,
280 ExceptionInfo *exception)
281</pre>
282
283<p>A description of each parameter follows:</p>
284
285<h5>image</h5>
286<p>the image.</p>
287
288<h5>factor</h5>
289<p>the shift factor.</p>
290
291<h5>exception</h5>
292<p>return any errors or warnings in this structure.</p>
293
294 </div>
295<h2><a href="http://www.imagemagick.org/api/MagickCore/fx_8c.html" id="CharcoalImage">CharcoalImage</a></h2>
296<div class="doc-section">
297
298<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>
299
300<p>The format of the CharcoalImage method is:</p>
301
302<pre class="code">
303 Image *CharcoalImage(const Image *image,const double radius,
304 const double sigma,ExceptionInfo *exception)
305</pre>
306
307<p>A description of each parameter follows:</p>
308
309<h5>image</h5>
310<p>the image.</p>
311
312<h5>radius</h5>
313<p>the radius of the pixel neighborhood.</p>
314
315<h5>sigma</h5>
316<p>the standard deviation of the Gaussian, in pixels.</p>
317
318<h5>exception</h5>
319<p>return any errors or warnings in this structure.</p>
320
321 </div>
322<h2><a href="http://www.imagemagick.org/api/MagickCore/fx_8c.html" id="ColorizeImage">ColorizeImage</a></h2>
323<div class="doc-section">
324
325<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>
326
327<p>The format of the ColorizeImage method is:</p>
328
329<pre class="code">
330 Image *ColorizeImage(const Image *image,const char *opacity,
331 const PixelPacket colorize,ExceptionInfo *exception)
332</pre>
333
334<p>A description of each parameter follows:</p>
335
336<h5>image</h5>
337<p>the image.</p>
338
339<h5>opacity</h5>
340<p>A character string indicating the level of opacity as a percentage.</p>
341
342<h5>colorize</h5>
343<p>A color value.</p>
344
345<h5>exception</h5>
346<p>return any errors or warnings in this structure.</p>
347
348 </div>
349<h2><a href="http://www.imagemagick.org/api/MagickCore/fx_8c.html" id="ColorMatrixImage">ColorMatrixImage</a></h2>
350<div class="doc-section">
351
352<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>
353
354<p>The format of the ColorMatrixImage method is:</p>
355
356<pre class="code">
357 Image *ColorMatrixImage(const Image *image,
358 const KernelInfo *color_matrix,ExceptionInfo *exception)
359</pre>
360
361<p>A description of each parameter follows:</p>
362
363<h5>image</h5>
364<p>the image.</p>
365
366<h5>color_matrix</h5>
367<p>the color matrix.</p>
368
369<h5>exception</h5>
370<p>return any errors or warnings in this structure.</p>
371
372 </div>
373<h2><a href="http://www.imagemagick.org/api/MagickCore/fx_8c.html" id="FxImage">FxImage</a></h2>
374<div class="doc-section">
375
376<p>FxImage() applies a mathematical expression to the specified image.</p>
377
378<p>The format of the FxImage method is:</p>
379
380<pre class="code">
381 Image *FxImage(const Image *image,const char *expression,
382 ExceptionInfo *exception)
383 Image *FxImageChannel(const Image *image,const ChannelType channel,
384 const char *expression,ExceptionInfo *exception)
385</pre>
386
387<p>A description of each parameter follows:</p>
388
389<h5>image</h5>
390<p>the image.</p>
391
392<h5>channel</h5>
393<p>the channel.</p>
394
395<h5>expression</h5>
396<p>A mathematical expression.</p>
397
398<h5>exception</h5>
399<p>return any errors or warnings in this structure.</p>
400
401 </div>
402<h2><a href="http://www.imagemagick.org/api/MagickCore/fx_8c.html" id="ImplodeImage">ImplodeImage</a></h2>
403<div class="doc-section">
404
405<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>
406
407<p>The format of the ImplodeImage method is:</p>
408
409<pre class="code">
410 Image *ImplodeImage(const Image *image,const double amount,
411 ExceptionInfo *exception)
412</pre>
413
414<p>A description of each parameter follows:</p>
415
416<h5>implode_image</h5>
417<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>
418
419<h5>image</h5>
420<p>the image.</p>
421
422<h5>amount</h5>
423<p>Define the extent of the implosion.</p>
424
425<h5>exception</h5>
426<p>return any errors or warnings in this structure.</p>
427
428 </div>
429<h2><a href="http://www.imagemagick.org/api/MagickCore/fx_8c.html" id="The_MorphImages">The MorphImages</a></h2>
430<div class="doc-section">
431
432<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>
433
434<p>The format of the MorphImage method is:</p>
435
436<pre class="code">
437 Image *MorphImages(const Image *image,const size_t number_frames,
438 ExceptionInfo *exception)
439</pre>
440
441<p>A description of each parameter follows:</p>
442
443<h5>image</h5>
444<p>the image.</p>
445
446<h5>number_frames</h5>
447<p>Define the number of in-between image to generate. The more in-between frames, the smoother the morph.</p>
448
449<h5>exception</h5>
450<p>return any errors or warnings in this structure.</p>
451
452 </div>
453<h2><a href="http://www.imagemagick.org/api/MagickCore/fx_8c.html" id="PlasmaImage">PlasmaImage</a></h2>
454<div class="doc-section">
455
456<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>
457
458<p>The format of the PlasmaImage method is:</p>
459
460<pre class="code">
461 MagickBooleanType PlasmaImage(Image *image,const SegmentInfo *segment,
462 size_t attenuate,size_t depth)
463</pre>
464
465<p>A description of each parameter follows:</p>
466
467<h5>image</h5>
468<p>the image.</p>
469
470<h5>segment</h5>
471<p> Define the region to apply plasma fractals values.</p>
472
473<h5>attenuate</h5>
474<p>Define the plasma attenuation factor.</p>
475
476<h5>depth</h5>
477<p>Limit the plasma recursion depth.</p>
478
479 </div>
480<h2><a href="http://www.imagemagick.org/api/MagickCore/fx_8c.html" id="PolaroidImage">PolaroidImage</a></h2>
481<div class="doc-section">
482
483<p>PolaroidImage() simulates a Polaroid picture.</p>
484
485<p>The format of the AnnotateImage method is:</p>
486
487<pre class="code">
488 Image *PolaroidImage(const Image *image,const DrawInfo *draw_info,
489 const double angle,ExceptionInfo exception)
490</pre>
491
492<p>A description of each parameter follows:</p>
493
494<h5>image</h5>
495<p>the image.</p>
496
497<h5>draw_info</h5>
498<p>the draw info.</p>
499
500<h5>angle</h5>
501<p>Apply the effect along this angle.</p>
502
503<h5>exception</h5>
504<p>return any errors or warnings in this structure.</p>
505
506 </div>
507<h2><a href="http://www.imagemagick.org/api/MagickCore/fx_8c.html" id="MagickSepiaToneImage">MagickSepiaToneImage</a></h2>
508<div class="doc-section">
509
510<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>
511
512<p>The format of the SepiaToneImage method is:</p>
513
514<pre class="code">
515 Image *SepiaToneImage(const Image *image,const double threshold,
516 ExceptionInfo *exception)
517</pre>
518
519<p>A description of each parameter follows:</p>
520
521<h5>image</h5>
522<p>the image.</p>
523
524<h5>threshold</h5>
525<p>the tone threshold.</p>
526
527<h5>exception</h5>
528<p>return any errors or warnings in this structure.</p>
529
530 </div>
531<h2><a href="http://www.imagemagick.org/api/MagickCore/fx_8c.html" id="ShadowImage">ShadowImage</a></h2>
532<div class="doc-section">
533
534<p>ShadowImage() simulates a shadow from the specified image and returns it.</p>
535
536<p>The format of the ShadowImage method is:</p>
537
538<pre class="code">
539 Image *ShadowImage(const Image *image,const double opacity,
540 const double sigma,const ssize_t x_offset,const ssize_t y_offset,
541 ExceptionInfo *exception)
542</pre>
543
544<p>A description of each parameter follows:</p>
545
546<h5>image</h5>
547<p>the image.</p>
548
549<h5>opacity</h5>
550<p>percentage transparency.</p>
551
552<h5>sigma</h5>
553<p>the standard deviation of the Gaussian, in pixels.</p>
554
555<h5>x_offset</h5>
556<p>the shadow x-offset.</p>
557
558<h5>y_offset</h5>
559<p>the shadow y-offset.</p>
560
561<h5>exception</h5>
562<p>return any errors or warnings in this structure.</p>
563
564 </div>
565<h2><a href="http://www.imagemagick.org/api/MagickCore/fx_8c.html" id="SketchImage">SketchImage</a></h2>
566<div class="doc-section">
567
568<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>
569
570<p>The format of the SketchImage method is:</p>
571
572<pre class="code">
573 Image *SketchImage(const Image *image,const double radius,
574 const double sigma,const double angle,ExceptionInfo *exception)
575</pre>
576
577<p>A description of each parameter follows:</p>
578
579<h5>image</h5>
580<p>the image.</p>
581
582<h5>radius</h5>
583<p>the radius of the Gaussian, in pixels, not counting the center pixel.</p>
584
585<h5>sigma</h5>
586<p>the standard deviation of the Gaussian, in pixels.</p>
587
588<h5>angle</h5>
589<p>Apply the effect along this angle.</p>
590
591<h5>exception</h5>
592<p>return any errors or warnings in this structure.</p>
593
594 </div>
595<h2><a href="http://www.imagemagick.org/api/MagickCore/fx_8c.html" id="SolarizeImage">SolarizeImage</a></h2>
596<div class="doc-section">
597
598<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>
599
600<p>The format of the SolarizeImage method is:</p>
601
602<pre class="code">
603 MagickBooleanType SolarizeImage(Image *image,const double threshold)
604</pre>
605
606<p>A description of each parameter follows:</p>
607
608<h5>image</h5>
609<p>the image.</p>
610
611<h5>threshold</h5>
612<p>Define the extent of the solarization.</p>
613
614 </div>
615<h2><a href="http://www.imagemagick.org/api/MagickCore/fx_8c.html" id="SteganoImage">SteganoImage</a></h2>
616<div class="doc-section">
617
618<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>
619
620<p>The format of the SteganoImage method is:</p>
621
622<pre class="code">
623 Image *SteganoImage(const Image *image,Image *watermark,
624 ExceptionInfo *exception)
625</pre>
626
627<p>A description of each parameter follows:</p>
628
629<h5>image</h5>
630<p>the image.</p>
631
632<h5>watermark</h5>
633<p>the watermark image.</p>
634
635<h5>exception</h5>
636<p>return any errors or warnings in this structure.</p>
637
638 </div>
639<h2><a href="http://www.imagemagick.org/api/MagickCore/fx_8c.html" id="StereoAnaglyphImage">StereoAnaglyphImage</a></h2>
640<div class="doc-section">
641
642<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>
643
644<p>The format of the StereoAnaglyphImage method is:</p>
645
646<pre class="code">
647 Image *StereoImage(const Image *left_image,const Image *right_image,
648 ExceptionInfo *exception)
649 Image *StereoAnaglyphImage(const Image *left_image,
650 const Image *right_image,const ssize_t x_offset,const ssize_t y_offset,
651 ExceptionInfo *exception)
652</pre>
653
654<p>A description of each parameter follows:</p>
655
656<h5>left_image</h5>
657<p>the left image.</p>
658
659<h5>right_image</h5>
660<p>the right image.</p>
661
662<h5>exception</h5>
663<p>return any errors or warnings in this structure.</p>
664
665<h5>x_offset</h5>
666<p>amount, in pixels, by which the left image is offset to the right of the right image.</p>
667
668<h5>y_offset</h5>
669<p>amount, in pixels, by which the left image is offset to the bottom of the right image.</p>
670
671
672 </div>
673<h2><a href="http://www.imagemagick.org/api/MagickCore/fx_8c.html" id="SwirlImage">SwirlImage</a></h2>
674<div class="doc-section">
675
676<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>
677
678<p>The format of the SwirlImage method is:</p>
679
680<pre class="code">
681 Image *SwirlImage(const Image *image,double degrees,
682 ExceptionInfo *exception)
683</pre>
684
685<p>A description of each parameter follows:</p>
686
687<h5>image</h5>
688<p>the image.</p>
689
690<h5>degrees</h5>
691<p>Define the tightness of the swirling effect.</p>
692
693<h5>exception</h5>
694<p>return any errors or warnings in this structure.</p>
695
696 </div>
697<h2><a href="http://www.imagemagick.org/api/MagickCore/fx_8c.html" id="TintImage">TintImage</a></h2>
698<div class="doc-section">
699
700<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>
701
702<p>The format of the TintImage method is:</p>
703
704<pre class="code">
705 Image *TintImage(const Image *image,const char *opacity,
706 const PixelPacket tint,ExceptionInfo *exception)
707</pre>
708
709<p>A description of each parameter follows:</p>
710
711<h5>image</h5>
712<p>the image.</p>
713
714<h5>opacity</h5>
715<p>A color value used for tinting.</p>
716
717<h5>tint</h5>
718<p>A color value used for tinting.</p>
719
720<h5>exception</h5>
721<p>return any errors or warnings in this structure.</p>
722
723 </div>
724<h2><a href="http://www.imagemagick.org/api/MagickCore/fx_8c.html" id="VignetteImage">VignetteImage</a></h2>
725<div class="doc-section">
726
727<p>VignetteImage() softens the edges of the image in vignette style.</p>
728
729<p>The format of the VignetteImage method is:</p>
730
731<pre class="code">
732 Image *VignetteImage(const Image *image,const double radius,
733 const double sigma,const ssize_t x,const ssize_t y,ExceptionInfo *exception)
734</pre>
735
736<p>A description of each parameter follows:</p>
737
738<h5>image</h5>
739<p>the image.</p>
740
741<h5>radius</h5>
742<p>the radius of the pixel neighborhood.</p>
743
744<h5>sigma</h5>
745<p>the standard deviation of the Gaussian, in pixels.</p>
746
747<h5>x, y</h5>
748<p>Define the x and y ellipse offset.</p>
749
750<h5>exception</h5>
751<p>return any errors or warnings in this structure.</p>
752
753 </div>
754<h2><a href="http://www.imagemagick.org/api/MagickCore/fx_8c.html" id="WaveImage">WaveImage</a></h2>
755<div class="doc-section">
756
757<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>
758
759<p>The format of the WaveImage method is:</p>
760
761<pre class="code">
762 Image *WaveImage(const Image *image,const double amplitude,
763 const double wave_length,ExceptionInfo *exception)
764</pre>
765
766<p>A description of each parameter follows:</p>
767
768<h5>image</h5>
769<p>the image.</p>
770
771<h5>amplitude, wave_length</h5>
772<p>Define the amplitude and wave length of the sine wave.</p>
773
774<h5>exception</h5>
775<p>return any errors or warnings in this structure.</p>
776
777 </div>
cristy06f63f22012-10-31 00:50:07 +0000[diff] [blame]778
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