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207
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]208<h1>Module effect Methods</h1>
cristyb52981c2011-03-19 17:09:31 +0000[diff] [blame]209<p class="navigation-index">[<a href="#AdaptiveBlurImage">AdaptiveBlurImage</a> &bull; <a href="#AdaptiveSharpenImage">AdaptiveSharpenImage</a> &bull; <a href="#BlurImage">BlurImage</a> &bull; <a href="#ConvolveImage">ConvolveImage</a> &bull; <a href="#DespeckleImage">DespeckleImage</a> &bull; <a href="#EdgeImage">EdgeImage</a> &bull; <a href="#EmbossImage">EmbossImage</a> &bull; <a href="#FilterImage">FilterImage</a> &bull; <a href="#GaussianBlurImage">GaussianBlurImage</a> &bull; <a href="#MotionBlurImage">MotionBlurImage</a> &bull; <a href="#PreviewImage">PreviewImage</a> &bull; <a href="#RadialBlurImage">RadialBlurImage</a> &bull; <a href="#SelectiveBlurImage">SelectiveBlurImage</a> &bull; <a href="#ShadeImage">ShadeImage</a> &bull; <a href="#SharpenImage">SharpenImage</a> &bull; <a href="#SpreadImage">SpreadImage</a> &bull; <a href="#StatisticImage">StatisticImage</a> &bull; <a href="#UnsharpMaskImage">UnsharpMaskImage</a>]</p>
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]210
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]211<h2><a href="http://www.imagemagick.org/api/MagickCore/effect_8c.html" id="AdaptiveBlurImage">AdaptiveBlurImage</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]212<div class="doc-section">
213
214<p>AdaptiveBlurImage() adaptively blurs the image by blurring less intensely near image edges and more intensely far from edges. We blur 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 AdaptiveBlurImage() selects a suitable radius for you.</p>
215
216<p>The format of the AdaptiveBlurImage method is:</p>
217
218<pre class="code">
219 Image *AdaptiveBlurImage(const Image *image,const double radius,
220 const double sigma,ExceptionInfo *exception)
221 Image *AdaptiveBlurImageChannel(const Image *image,
222 const ChannelType channel,double radius,const double sigma,
223 ExceptionInfo *exception)
224</pre>
225
226<p>A description of each parameter follows:</p>
227
228<h5>image</h5>
229<p>the image.</p>
230
231<h5>channel</h5>
232<p>the channel type.</p>
233
234<h5>radius</h5>
235<p>the radius of the Gaussian, in pixels, not counting the center pixel.</p>
236
237<h5>sigma</h5>
238<p>the standard deviation of the Laplacian, in pixels.</p>
239
240<h5>exception</h5>
241<p>return any errors or warnings in this structure.</p>
242
243 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]244<h2><a href="http://www.imagemagick.org/api/MagickCore/effect_8c.html" id="AdaptiveSharpenImage">AdaptiveSharpenImage</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]245<div class="doc-section">
246
247<p>AdaptiveSharpenImage() adaptively sharpens the image by sharpening more intensely near image edges and less intensely far from edges. We sharpen 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 AdaptiveSharpenImage() selects a suitable radius for you.</p>
248
249<p>The format of the AdaptiveSharpenImage method is:</p>
250
251<pre class="code">
252 Image *AdaptiveSharpenImage(const Image *image,const double radius,
253 const double sigma,ExceptionInfo *exception)
254 Image *AdaptiveSharpenImageChannel(const Image *image,
255 const ChannelType channel,double radius,const double sigma,
256 ExceptionInfo *exception)
257</pre>
258
259<p>A description of each parameter follows:</p>
260
261<h5>image</h5>
262<p>the image.</p>
263
264<h5>channel</h5>
265<p>the channel type.</p>
266
267<h5>radius</h5>
268<p>the radius of the Gaussian, in pixels, not counting the center pixel.</p>
269
270<h5>sigma</h5>
271<p>the standard deviation of the Laplacian, in pixels.</p>
272
273<h5>exception</h5>
274<p>return any errors or warnings in this structure.</p>
275
276 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]277<h2><a href="http://www.imagemagick.org/api/MagickCore/effect_8c.html" id="BlurImage">BlurImage</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]278<div class="doc-section">
279
280<p>BlurImage() blurs an image. We convolve the image with a Gaussian operator of the given radius and standard deviation (sigma). For reasonable results, the radius should be larger than sigma. Use a radius of 0 and BlurImage() selects a suitable radius for you.</p>
281
282<p>BlurImage() differs from GaussianBlurImage() in that it uses a separable kernel which is faster but mathematically equivalent to the non-separable kernel.</p>
283
284<p>The format of the BlurImage method is:</p>
285
286<pre class="code">
287 Image *BlurImage(const Image *image,const double radius,
288 const double sigma,ExceptionInfo *exception)
289 Image *BlurImageChannel(const Image *image,const ChannelType channel,
290 const double radius,const double sigma,ExceptionInfo *exception)
291</pre>
292
293<p>A description of each parameter follows:</p>
294
295<h5>image</h5>
296<p>the image.</p>
297
298<h5>channel</h5>
299<p>the channel type.</p>
300
301<h5>radius</h5>
302<p>the radius of the Gaussian, in pixels, not counting the center pixel.</p>
303
304<h5>sigma</h5>
305<p>the standard deviation of the Gaussian, in pixels.</p>
306
307<h5>exception</h5>
308<p>return any errors or warnings in this structure.</p>
309
310 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]311<h2><a href="http://www.imagemagick.org/api/MagickCore/effect_8c.html" id="ConvolveImage">ConvolveImage</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]312<div class="doc-section">
313
314<p>ConvolveImage() applies a custom convolution kernel to the image.</p>
315
316<p>The format of the ConvolveImage method is:</p>
317
318<pre class="code">
319 Image *ConvolveImage(const Image *image,const size_t order,
320 const double *kernel,ExceptionInfo *exception)
321 Image *ConvolveImageChannel(const Image *image,const ChannelType channel,
322 const size_t order,const double *kernel,ExceptionInfo *exception)
323</pre>
324
325<p>A description of each parameter follows:</p>
326
327<h5>image</h5>
328<p>the image.</p>
329
330<h5>channel</h5>
331<p>the channel type.</p>
332
333<h5>order</h5>
334<p>the number of columns and rows in the filter kernel.</p>
335
336<h5>kernel</h5>
337<p>An array of double representing the convolution kernel.</p>
338
339<h5>exception</h5>
340<p>return any errors or warnings in this structure.</p>
341
342 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]343<h2><a href="http://www.imagemagick.org/api/MagickCore/effect_8c.html" id="DespeckleImage">DespeckleImage</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]344<div class="doc-section">
345
346<p>DespeckleImage() reduces the speckle noise in an image while perserving the edges of the original image.</p>
347
348<p>The format of the DespeckleImage method is:</p>
349
350<pre class="code">
351 Image *DespeckleImage(const Image *image,ExceptionInfo *exception)
352</pre>
353
354<p>A description of each parameter follows:</p>
355
356<h5>image</h5>
357<p>the image.</p>
358
359<h5>exception</h5>
360<p>return any errors or warnings in this structure.</p>
361
362 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]363<h2><a href="http://www.imagemagick.org/api/MagickCore/effect_8c.html" id="EdgeImage">EdgeImage</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]364<div class="doc-section">
365
366<p>EdgeImage() finds edges in an image. Radius defines the radius of the convolution filter. Use a radius of 0 and EdgeImage() selects a suitable radius for you.</p>
367
368<p>The format of the EdgeImage method is:</p>
369
370<pre class="code">
371 Image *EdgeImage(const Image *image,const double radius,
372 ExceptionInfo *exception)
373</pre>
374
375<p>A description of each parameter follows:</p>
376
377<h5>image</h5>
378<p>the image.</p>
379
380<h5>radius</h5>
381<p>the radius of the pixel neighborhood.</p>
382
383<h5>exception</h5>
384<p>return any errors or warnings in this structure.</p>
385
386 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]387<h2><a href="http://www.imagemagick.org/api/MagickCore/effect_8c.html" id="EmbossImage">EmbossImage</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]388<div class="doc-section">
389
390<p>EmbossImage() returns a grayscale image with a three-dimensional effect. 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 Emboss() selects a suitable radius for you.</p>
391
392<p>The format of the EmbossImage method is:</p>
393
394<pre class="code">
395 Image *EmbossImage(const Image *image,const double radius,
396 const double sigma,ExceptionInfo *exception)
397</pre>
398
399<p>A description of each parameter follows:</p>
400
401<h5>image</h5>
402<p>the image.</p>
403
404<h5>radius</h5>
405<p>the radius of the pixel neighborhood.</p>
406
407<h5>sigma</h5>
408<p>the standard deviation of the Gaussian, in pixels.</p>
409
410<h5>exception</h5>
411<p>return any errors or warnings in this structure.</p>
412
413 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]414<h2><a href="http://www.imagemagick.org/api/MagickCore/effect_8c.html" id="FilterImage">FilterImage</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]415<div class="doc-section">
416
417<p>FilterImage() applies a custom convolution kernel to the image.</p>
418
419<p>The format of the FilterImage method is:</p>
420
421<pre class="code">
422 Image *FilterImage(const Image *image,const KernelInfo *kernel,
423 ExceptionInfo *exception)
424 Image *FilterImageChannel(const Image *image,const ChannelType channel,
425 const KernelInfo *kernel,ExceptionInfo *exception)
426</pre>
427
428<p>A description of each parameter follows:</p>
429
430<h5>image</h5>
431<p>the image.</p>
432
433<h5>channel</h5>
434<p>the channel type.</p>
435
436<h5>kernel</h5>
437<p>the filtering kernel.</p>
438
439<h5>exception</h5>
440<p>return any errors or warnings in this structure.</p>
441
442 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]443<h2><a href="http://www.imagemagick.org/api/MagickCore/effect_8c.html" id="GaussianBlurImage">GaussianBlurImage</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]444<div class="doc-section">
445
446<p>GaussianBlurImage() blurs an image. We convolve the image with a Gaussian operator of the given radius and standard deviation (sigma). For reasonable results, the radius should be larger than sigma. Use a radius of 0 and GaussianBlurImage() selects a suitable radius for you</p>
447
448<p>The format of the GaussianBlurImage method is:</p>
449
450<pre class="code">
451 Image *GaussianBlurImage(const Image *image,onst double radius,
452 const double sigma,ExceptionInfo *exception)
453 Image *GaussianBlurImageChannel(const Image *image,
454 const ChannelType channel,const double radius,const double sigma,
455 ExceptionInfo *exception)
456</pre>
457
458<p>A description of each parameter follows:</p>
459
460<h5>image</h5>
461<p>the image.</p>
462
463<h5>channel</h5>
464<p>the channel type.</p>
465
466<h5>radius</h5>
467<p>the radius of the Gaussian, in pixels, not counting the center pixel.</p>
468
469<h5>sigma</h5>
470<p>the standard deviation of the Gaussian, in pixels.</p>
471
472<h5>exception</h5>
473<p>return any errors or warnings in this structure.</p>
474
475 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]476<h2><a href="http://www.imagemagick.org/api/MagickCore/effect_8c.html" id="MotionBlurImage">MotionBlurImage</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]477<div class="doc-section">
478
479<p>MotionBlurImage() simulates motion blur. 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 MotionBlurImage() selects a suitable radius for you. Angle gives the angle of the blurring motion.</p>
480
481<p>Andrew Protano contributed this effect.</p>
482
483<p>The format of the MotionBlurImage method is:</p>
484
485<pre class="code">
486 Image *MotionBlurImage(const Image *image,const double radius,
487 const double sigma,const double angle,ExceptionInfo *exception)
488 Image *MotionBlurImageChannel(const Image *image,const ChannelType channel,
489 const double radius,const double sigma,const double angle,
490 ExceptionInfo *exception)
491</pre>
492
493<p>A description of each parameter follows:</p>
494
495<h5>image</h5>
496<p>the image.</p>
497
498<h5>channel</h5>
499<p>the channel type.</p>
500
501<h5>radius</h5>
502<p>the radius of the Gaussian, in pixels, not counting the center</p>
503<h5>radius</h5>
504<p>the radius of the Gaussian, in pixels, not counting the center pixel.</p>
505
506<h5>sigma</h5>
507<p>the standard deviation of the Gaussian, in pixels.</p>
508
509<h5>angle</h5>
510<p>Apply the effect along this angle.</p>
511
512<h5>exception</h5>
513<p>return any errors or warnings in this structure.</p>
514
515 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]516<h2><a href="http://www.imagemagick.org/api/MagickCore/effect_8c.html" id="PreviewImage">PreviewImage</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]517<div class="doc-section">
518
519<p>PreviewImage() tiles 9 thumbnails of the specified image with an image processing operation applied with varying parameters. This may be helpful pin-pointing an appropriate parameter for a particular image processing operation.</p>
520
521<p>The format of the PreviewImages method is:</p>
522
523<pre class="code">
524 Image *PreviewImages(const Image *image,const PreviewType preview,
525 ExceptionInfo *exception)
526</pre>
527
528<p>A description of each parameter follows:</p>
529
530<h5>image</h5>
531<p>the image.</p>
532
533<h5>preview</h5>
534<p>the image processing operation.</p>
535
536<h5>exception</h5>
537<p>return any errors or warnings in this structure.</p>
538
539 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]540<h2><a href="http://www.imagemagick.org/api/MagickCore/effect_8c.html" id="RadialBlurImage">RadialBlurImage</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]541<div class="doc-section">
542
543<p>RadialBlurImage() applies a radial blur to the image.</p>
544
545<p>Andrew Protano contributed this effect.</p>
546
547<p>The format of the RadialBlurImage method is:</p>
548
549<pre class="code">
550 Image *RadialBlurImage(const Image *image,const double angle,
551 ExceptionInfo *exception)
552 Image *RadialBlurImageChannel(const Image *image,const ChannelType channel,
553 const double angle,ExceptionInfo *exception)
554</pre>
555
556<p>A description of each parameter follows:</p>
557
558<h5>image</h5>
559<p>the image.</p>
560
561<h5>channel</h5>
562<p>the channel type.</p>
563
564<h5>angle</h5>
565<p>the angle of the radial blur.</p>
566
567<h5>exception</h5>
568<p>return any errors or warnings in this structure.</p>
569
570 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]571<h2><a href="http://www.imagemagick.org/api/MagickCore/effect_8c.html" id="SelectiveBlurImage">SelectiveBlurImage</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]572<div class="doc-section">
573
574<p>SelectiveBlurImage() selectively blur pixels within a contrast threshold. It is similar to the unsharpen mask that sharpens everything with contrast above a certain threshold.</p>
575
576<p>The format of the SelectiveBlurImage method is:</p>
577
578<pre class="code">
579 Image *SelectiveBlurImage(const Image *image,const double radius,
580 const double sigma,const double threshold,ExceptionInfo *exception)
581 Image *SelectiveBlurImageChannel(const Image *image,
582 const ChannelType channel,const double radius,const double sigma,
583 const double threshold,ExceptionInfo *exception)
584</pre>
585
586<p>A description of each parameter follows:</p>
587
588<h5>image</h5>
589<p>the image.</p>
590
591<h5>channel</h5>
592<p>the channel type.</p>
593
594<h5>radius</h5>
595<p>the radius of the Gaussian, in pixels, not counting the center pixel.</p>
596
597<h5>sigma</h5>
598<p>the standard deviation of the Gaussian, in pixels.</p>
599
600<h5>threshold</h5>
601<p>only pixels within this contrast threshold are included in the blur operation.</p>
602
603<h5>exception</h5>
604<p>return any errors or warnings in this structure.</p>
605
606 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]607<h2><a href="http://www.imagemagick.org/api/MagickCore/effect_8c.html" id="ShadeImage">ShadeImage</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]608<div class="doc-section">
609
610<p>ShadeImage() shines a distant light on an image to create a three-dimensional effect. You control the positioning of the light with azimuth and elevation; azimuth is measured in degrees off the x axis and elevation is measured in pixels above the Z axis.</p>
611
612<p>The format of the ShadeImage method is:</p>
613
614<pre class="code">
615 Image *ShadeImage(const Image *image,const MagickBooleanType gray,
616 const double azimuth,const double elevation,ExceptionInfo *exception)
617</pre>
618
619<p>A description of each parameter follows:</p>
620
621<h5>image</h5>
622<p>the image.</p>
623
624<h5>gray</h5>
625<p>A value other than zero shades the intensity of each pixel.</p>
626
627<h5>azimuth, elevation</h5>
628<p>Define the light source direction.</p>
629
630<h5>exception</h5>
631<p>return any errors or warnings in this structure.</p>
632
633 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]634<h2><a href="http://www.imagemagick.org/api/MagickCore/effect_8c.html" id="SharpenImage">SharpenImage</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]635<div class="doc-section">
636
637<p>SharpenImage() sharpens the image. 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 SharpenImage() selects a suitable radius for you.</p>
638
639<p>Using a separable kernel would be faster, but the negative weights cancel out on the corners of the kernel producing often undesirable ringing in the filtered result; this can be avoided by using a 2D gaussian shaped image sharpening kernel instead.</p>
640
641<p>The format of the SharpenImage method is:</p>
642
643<pre class="code">
644 Image *SharpenImage(const Image *image,const double radius,
645 const double sigma,ExceptionInfo *exception)
646 Image *SharpenImageChannel(const Image *image,const ChannelType channel,
647 const double radius,const double sigma,ExceptionInfo *exception)
648</pre>
649
650<p>A description of each parameter follows:</p>
651
652<h5>image</h5>
653<p>the image.</p>
654
655<h5>channel</h5>
656<p>the channel type.</p>
657
658<h5>radius</h5>
659<p>the radius of the Gaussian, in pixels, not counting the center pixel.</p>
660
661<h5>sigma</h5>
662<p>the standard deviation of the Laplacian, in pixels.</p>
663
664<h5>exception</h5>
665<p>return any errors or warnings in this structure.</p>
666
667 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]668<h2><a href="http://www.imagemagick.org/api/MagickCore/effect_8c.html" id="SpreadImage">SpreadImage</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]669<div class="doc-section">
670
671<p>SpreadImage() is a special effects method that randomly displaces each pixel in a block defined by the radius parameter.</p>
672
673<p>The format of the SpreadImage method is:</p>
674
675<pre class="code">
676 Image *SpreadImage(const Image *image,const double radius,
677 ExceptionInfo *exception)
678</pre>
679
680<p>A description of each parameter follows:</p>
681
682<h5>image</h5>
683<p>the image.</p>
684
685<h5>radius</h5>
686<p>Choose a random pixel in a neighborhood of this extent.</p>
687
688<h5>exception</h5>
689<p>return any errors or warnings in this structure.</p>
690
691 </div>
cristyb52981c2011-03-19 17:09:31 +0000[diff] [blame]692<h2><a href="http://www.imagemagick.org/api/MagickCore/effect_8c.html" id="StatisticImage">StatisticImage</a></h2>
693<div class="doc-section">
694
695<p>StatisticImage() makes each pixel the min / max / median / mode / etc. of the neighborhood of the specified width and height.</p>
696
697<p>The format of the StatisticImage method is:</p>
698
699<pre class="code">
700 Image *StatisticImage(const Image *image,const StatisticType type,
701 const size_t width,const size_t height,ExceptionInfo *exception)
702 Image *StatisticImageChannel(const Image *image,
703 const ChannelType channel,const StatisticType type,
704 const size_t width,const size_t height,ExceptionInfo *exception)
705</pre>
706
707<p>A description of each parameter follows:</p>
708
709<h5>image</h5>
710<p>the image.</p>
711
712<h5>channel</h5>
713<p>the image channel.</p>
714
715<h5>type</h5>
716<p>the statistic type (median, mode, etc.).</p>
717
718<h5>width</h5>
719<p>the width of the pixel neighborhood.</p>
720
721<h5>height</h5>
722<p>the height of the pixel neighborhood.</p>
723
724<h5>exception</h5>
725<p>return any errors or warnings in this structure.</p>
726
727 </div>
cristy350dea42011-02-15 17:31:04 +0000[diff] [blame]728<h2><a href="http://www.imagemagick.org/api/MagickCore/effect_8c.html" id="UnsharpMaskImage">UnsharpMaskImage</a></h2>
cristy6f77f692011-02-15 15:31:39 +0000[diff] [blame]729<div class="doc-section">
730
731<p>UnsharpMaskImage() sharpens one or more image channels. 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 UnsharpMaskImage() selects a suitable radius for you.</p>
732
733<p>The format of the UnsharpMaskImage method is:</p>
734
735<pre class="code">
736 Image *UnsharpMaskImage(const Image *image,const double radius,
737 const double sigma,const double amount,const double threshold,
738 ExceptionInfo *exception)
739 Image *UnsharpMaskImageChannel(const Image *image,
740 const ChannelType channel,const double radius,const double sigma,
741 const double amount,const double threshold,ExceptionInfo *exception)
742</pre>
743
744<p>A description of each parameter follows:</p>
745
746<h5>image</h5>
747<p>the image.</p>
748
749<h5>channel</h5>
750<p>the channel type.</p>
751
752<h5>radius</h5>
753<p>the radius of the Gaussian, in pixels, not counting the center pixel.</p>
754
755<h5>sigma</h5>
756<p>the standard deviation of the Gaussian, in pixels.</p>
757
758<h5>amount</h5>
759<p>the percentage of the difference between the original and the blur image that is added back into the original.</p>
760
761<h5>threshold</h5>
762<p>the threshold in pixels needed to apply the diffence amount.</p>
763
764<h5>exception</h5>
765<p>return any errors or warnings in this structure.</p>
766
767 </div>
cristy3eaa0ef2010-03-06 20:35:26 +0000[diff] [blame]768
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