2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
6 % EEEEE FFFFF FFFFF EEEEE CCCC TTTTT %
8 % EEE FFF FFF EEE C T %
10 % EEEEE F F EEEEE CCCC T %
13 % MagickCore Image Effects Methods %
20 % Copyright 1999-2010 ImageMagick Studio LLC, a non-profit organization %
21 % dedicated to making software imaging solutions freely available. %
23 % You may not use this file except in compliance with the License. You may %
24 % obtain a copy of the License at %
26 % http://www.imagemagick.org/script/license.php %
28 % Unless required by applicable law or agreed to in writing, software %
29 % distributed under the License is distributed on an "AS IS" BASIS, %
30 % WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. %
31 % See the License for the specific language governing permissions and %
32 % limitations under the License. %
34 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
43 #include "magick/studio.h"
44 #include "magick/accelerate.h"
45 #include "magick/blob.h"
46 #include "magick/cache-view.h"
47 #include "magick/color.h"
48 #include "magick/color-private.h"
49 #include "magick/colorspace.h"
50 #include "magick/constitute.h"
51 #include "magick/decorate.h"
52 #include "magick/draw.h"
53 #include "magick/enhance.h"
54 #include "magick/exception.h"
55 #include "magick/exception-private.h"
56 #include "magick/effect.h"
57 #include "magick/fx.h"
58 #include "magick/gem.h"
59 #include "magick/geometry.h"
60 #include "magick/image-private.h"
61 #include "magick/list.h"
62 #include "magick/log.h"
63 #include "magick/memory_.h"
64 #include "magick/monitor.h"
65 #include "magick/monitor-private.h"
66 #include "magick/montage.h"
67 #include "magick/morphology.h"
68 #include "magick/paint.h"
69 #include "magick/pixel-private.h"
70 #include "magick/property.h"
71 #include "magick/quantize.h"
72 #include "magick/quantum.h"
73 #include "magick/random_.h"
74 #include "magick/random-private.h"
75 #include "magick/resample.h"
76 #include "magick/resample-private.h"
77 #include "magick/resize.h"
78 #include "magick/resource_.h"
79 #include "magick/segment.h"
80 #include "magick/shear.h"
81 #include "magick/signature-private.h"
82 #include "magick/string_.h"
83 #include "magick/thread-private.h"
84 #include "magick/transform.h"
85 #include "magick/threshold.h"
88 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
92 % A d a p t i v e B l u r I m a g e %
96 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
98 % AdaptiveBlurImage() adaptively blurs the image by blurring less
99 % intensely near image edges and more intensely far from edges. We blur the
100 % image with a Gaussian operator of the given radius and standard deviation
101 % (sigma). For reasonable results, radius should be larger than sigma. Use a
102 % radius of 0 and AdaptiveBlurImage() selects a suitable radius for you.
104 % The format of the AdaptiveBlurImage method is:
106 % Image *AdaptiveBlurImage(const Image *image,const double radius,
107 % const double sigma,ExceptionInfo *exception)
108 % Image *AdaptiveBlurImageChannel(const Image *image,
109 % const ChannelType channel,double radius,const double sigma,
110 % ExceptionInfo *exception)
112 % A description of each parameter follows:
114 % o image: the image.
116 % o channel: the channel type.
118 % o radius: the radius of the Gaussian, in pixels, not counting the center
121 % o sigma: the standard deviation of the Laplacian, in pixels.
123 % o exception: return any errors or warnings in this structure.
127 MagickExport Image *AdaptiveBlurImage(const Image *image,const double radius,
128 const double sigma,ExceptionInfo *exception)
133 blur_image=AdaptiveBlurImageChannel(image,DefaultChannels,radius,sigma,
138 MagickExport Image *AdaptiveBlurImageChannel(const Image *image,
139 const ChannelType channel,const double radius,const double sigma,
140 ExceptionInfo *exception)
142 #define AdaptiveBlurImageTag "Convolve/Image"
143 #define MagickSigma (fabs(sigma) <= MagickEpsilon ? 1.0 : sigma)
181 assert(image != (const Image *) NULL);
182 assert(image->signature == MagickSignature);
183 if (image->debug != MagickFalse)
184 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
185 assert(exception != (ExceptionInfo *) NULL);
186 assert(exception->signature == MagickSignature);
187 blur_image=CloneImage(image,image->columns,image->rows,MagickTrue,exception);
188 if (blur_image == (Image *) NULL)
189 return((Image *) NULL);
190 if (fabs(sigma) <= MagickEpsilon)
192 if (SetImageStorageClass(blur_image,DirectClass) == MagickFalse)
194 InheritException(exception,&blur_image->exception);
195 blur_image=DestroyImage(blur_image);
196 return((Image *) NULL);
199 Edge detect the image brighness channel, level, blur, and level again.
201 edge_image=EdgeImage(image,radius,exception);
202 if (edge_image == (Image *) NULL)
204 blur_image=DestroyImage(blur_image);
205 return((Image *) NULL);
207 (void) LevelImage(edge_image,"20%,95%");
208 gaussian_image=GaussianBlurImage(edge_image,radius,sigma,exception);
209 if (gaussian_image != (Image *) NULL)
211 edge_image=DestroyImage(edge_image);
212 edge_image=gaussian_image;
214 (void) LevelImage(edge_image,"10%,95%");
216 Create a set of kernels from maximum (radius,sigma) to minimum.
218 width=GetOptimalKernelWidth2D(radius,sigma);
219 kernel=(double **) AcquireQuantumMemory((size_t) width,sizeof(*kernel));
220 if (kernel == (double **) NULL)
222 edge_image=DestroyImage(edge_image);
223 blur_image=DestroyImage(blur_image);
224 ThrowImageException(ResourceLimitError,"MemoryAllocationFailed");
226 (void) ResetMagickMemory(kernel,0,(size_t) width*sizeof(*kernel));
227 for (i=0; i < (ssize_t) width; i+=2)
229 kernel[i]=(double *) AcquireQuantumMemory((size_t) (width-i),(width-i)*
231 if (kernel[i] == (double *) NULL)
234 j=(ssize_t) (width-i)/2;
236 for (v=(-j); v <= j; v++)
238 for (u=(-j); u <= j; u++)
240 kernel[i][k]=exp(-((double) u*u+v*v)/(2.0*MagickSigma*MagickSigma))/
241 (2.0*MagickPI*MagickSigma*MagickSigma);
242 normalize+=kernel[i][k];
246 if (fabs(normalize) <= MagickEpsilon)
248 normalize=1.0/normalize;
249 for (k=0; k < (j*j); k++)
250 kernel[i][k]=normalize*kernel[i][k];
252 if (i < (ssize_t) width)
254 for (i-=2; i >= 0; i-=2)
255 kernel[i]=(double *) RelinquishMagickMemory(kernel[i]);
256 kernel=(double **) RelinquishMagickMemory(kernel);
257 edge_image=DestroyImage(edge_image);
258 blur_image=DestroyImage(blur_image);
259 ThrowImageException(ResourceLimitError,"MemoryAllocationFailed");
262 Adaptively blur image.
266 GetMagickPixelPacket(image,&bias);
267 SetMagickPixelPacketBias(image,&bias);
268 image_view=AcquireCacheView(image);
269 edge_view=AcquireCacheView(edge_image);
270 blur_view=AcquireCacheView(blur_image);
271 #if defined(MAGICKCORE_OPENMP_SUPPORT)
272 #pragma omp parallel for schedule(dynamic,4) shared(progress,status)
274 for (y=0; y < (ssize_t) blur_image->rows; y++)
276 register const IndexPacket
279 register const PixelPacket
284 *restrict blur_indexes;
292 if (status == MagickFalse)
294 r=GetCacheViewVirtualPixels(edge_view,0,y,edge_image->columns,1,exception);
295 q=QueueCacheViewAuthenticPixels(blur_view,0,y,blur_image->columns,1,
297 if ((r == (const PixelPacket *) NULL) || (q == (PixelPacket *) NULL))
302 blur_indexes=GetCacheViewAuthenticIndexQueue(blur_view);
303 for (x=0; x < (ssize_t) blur_image->columns; x++)
312 register const double
321 i=(ssize_t) ceil((double) width*QuantumScale*PixelIntensity(r)-0.5);
325 if (i > (ssize_t) width)
329 p=GetCacheViewVirtualPixels(image_view,x-((ssize_t) (width-i)/2L),y-
330 (ssize_t) ((width-i)/2L),width-i,width-i,exception);
331 if (p == (const PixelPacket *) NULL)
333 indexes=GetCacheViewVirtualIndexQueue(image_view);
336 for (v=0; v < (ssize_t) (width-i); v++)
338 for (u=0; u < (ssize_t) (width-i); u++)
341 if (((channel & OpacityChannel) != 0) &&
342 (image->matte != MagickFalse))
343 alpha=(MagickRealType) (QuantumScale*GetAlphaPixelComponent(p));
344 if ((channel & RedChannel) != 0)
345 pixel.red+=(*k)*alpha*GetRedPixelComponent(p);
346 if ((channel & GreenChannel) != 0)
347 pixel.green+=(*k)*alpha*GetGreenPixelComponent(p);
348 if ((channel & BlueChannel) != 0)
349 pixel.blue+=(*k)*alpha*GetBluePixelComponent(p);
350 if ((channel & OpacityChannel) != 0)
351 pixel.opacity+=(*k)*GetOpacityPixelComponent(p);
352 if (((channel & IndexChannel) != 0) &&
353 (image->colorspace == CMYKColorspace))
354 pixel.index+=(*k)*alpha*indexes[x+(width-i)*v+u];
360 gamma=1.0/(fabs((double) gamma) <= MagickEpsilon ? 1.0 : gamma);
361 if ((channel & RedChannel) != 0)
362 q->red=ClampToQuantum(gamma*GetRedPixelComponent(&pixel));
363 if ((channel & GreenChannel) != 0)
364 q->green=ClampToQuantum(gamma*GetGreenPixelComponent(&pixel));
365 if ((channel & BlueChannel) != 0)
366 q->blue=ClampToQuantum(gamma*GetBluePixelComponent(&pixel));
367 if ((channel & OpacityChannel) != 0)
368 SetOpacityPixelComponent(q,ClampOpacityPixelComponent(&pixel));
369 if (((channel & IndexChannel) != 0) &&
370 (image->colorspace == CMYKColorspace))
371 blur_indexes[x]=ClampToQuantum(gamma*GetIndexPixelComponent(&pixel));
375 if (SyncCacheViewAuthenticPixels(blur_view,exception) == MagickFalse)
377 if (image->progress_monitor != (MagickProgressMonitor) NULL)
382 #if defined(MAGICKCORE_OPENMP_SUPPORT)
383 #pragma omp critical (MagickCore_AdaptiveBlurImageChannel)
385 proceed=SetImageProgress(image,AdaptiveBlurImageTag,progress++,
387 if (proceed == MagickFalse)
391 blur_image->type=image->type;
392 blur_view=DestroyCacheView(blur_view);
393 edge_view=DestroyCacheView(edge_view);
394 image_view=DestroyCacheView(image_view);
395 edge_image=DestroyImage(edge_image);
396 for (i=0; i < (ssize_t) width; i+=2)
397 kernel[i]=(double *) RelinquishMagickMemory(kernel[i]);
398 kernel=(double **) RelinquishMagickMemory(kernel);
399 if (status == MagickFalse)
400 blur_image=DestroyImage(blur_image);
405 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
409 % A d a p t i v e S h a r p e n I m a g e %
413 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
415 % AdaptiveSharpenImage() adaptively sharpens the image by sharpening more
416 % intensely near image edges and less intensely far from edges. We sharpen the
417 % image with a Gaussian operator of the given radius and standard deviation
418 % (sigma). For reasonable results, radius should be larger than sigma. Use a
419 % radius of 0 and AdaptiveSharpenImage() selects a suitable radius for you.
421 % The format of the AdaptiveSharpenImage method is:
423 % Image *AdaptiveSharpenImage(const Image *image,const double radius,
424 % const double sigma,ExceptionInfo *exception)
425 % Image *AdaptiveSharpenImageChannel(const Image *image,
426 % const ChannelType channel,double radius,const double sigma,
427 % ExceptionInfo *exception)
429 % A description of each parameter follows:
431 % o image: the image.
433 % o channel: the channel type.
435 % o radius: the radius of the Gaussian, in pixels, not counting the center
438 % o sigma: the standard deviation of the Laplacian, in pixels.
440 % o exception: return any errors or warnings in this structure.
444 MagickExport Image *AdaptiveSharpenImage(const Image *image,const double radius,
445 const double sigma,ExceptionInfo *exception)
450 sharp_image=AdaptiveSharpenImageChannel(image,DefaultChannels,radius,sigma,
455 MagickExport Image *AdaptiveSharpenImageChannel(const Image *image,
456 const ChannelType channel,const double radius,const double sigma,
457 ExceptionInfo *exception)
459 #define AdaptiveSharpenImageTag "Convolve/Image"
460 #define MagickSigma (fabs(sigma) <= MagickEpsilon ? 1.0 : sigma)
498 assert(image != (const Image *) NULL);
499 assert(image->signature == MagickSignature);
500 if (image->debug != MagickFalse)
501 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
502 assert(exception != (ExceptionInfo *) NULL);
503 assert(exception->signature == MagickSignature);
504 sharp_image=CloneImage(image,0,0,MagickTrue,exception);
505 if (sharp_image == (Image *) NULL)
506 return((Image *) NULL);
507 if (fabs(sigma) <= MagickEpsilon)
509 if (SetImageStorageClass(sharp_image,DirectClass) == MagickFalse)
511 InheritException(exception,&sharp_image->exception);
512 sharp_image=DestroyImage(sharp_image);
513 return((Image *) NULL);
516 Edge detect the image brighness channel, level, sharp, and level again.
518 edge_image=EdgeImage(image,radius,exception);
519 if (edge_image == (Image *) NULL)
521 sharp_image=DestroyImage(sharp_image);
522 return((Image *) NULL);
524 (void) LevelImage(edge_image,"20%,95%");
525 gaussian_image=GaussianBlurImage(edge_image,radius,sigma,exception);
526 if (gaussian_image != (Image *) NULL)
528 edge_image=DestroyImage(edge_image);
529 edge_image=gaussian_image;
531 (void) LevelImage(edge_image,"10%,95%");
533 Create a set of kernels from maximum (radius,sigma) to minimum.
535 width=GetOptimalKernelWidth2D(radius,sigma);
536 kernel=(double **) AcquireQuantumMemory((size_t) width,sizeof(*kernel));
537 if (kernel == (double **) NULL)
539 edge_image=DestroyImage(edge_image);
540 sharp_image=DestroyImage(sharp_image);
541 ThrowImageException(ResourceLimitError,"MemoryAllocationFailed");
543 (void) ResetMagickMemory(kernel,0,(size_t) width*sizeof(*kernel));
544 for (i=0; i < (ssize_t) width; i+=2)
546 kernel[i]=(double *) AcquireQuantumMemory((size_t) (width-i),(width-i)*
548 if (kernel[i] == (double *) NULL)
551 j=(ssize_t) (width-i)/2;
553 for (v=(-j); v <= j; v++)
555 for (u=(-j); u <= j; u++)
557 kernel[i][k]=(-exp(-((double) u*u+v*v)/(2.0*MagickSigma*MagickSigma))/
558 (2.0*MagickPI*MagickSigma*MagickSigma));
559 normalize+=kernel[i][k];
563 if (fabs(normalize) <= MagickEpsilon)
565 normalize=1.0/normalize;
566 for (k=0; k < (j*j); k++)
567 kernel[i][k]=normalize*kernel[i][k];
569 if (i < (ssize_t) width)
571 for (i-=2; i >= 0; i-=2)
572 kernel[i]=(double *) RelinquishMagickMemory(kernel[i]);
573 kernel=(double **) RelinquishMagickMemory(kernel);
574 edge_image=DestroyImage(edge_image);
575 sharp_image=DestroyImage(sharp_image);
576 ThrowImageException(ResourceLimitError,"MemoryAllocationFailed");
579 Adaptively sharpen image.
583 GetMagickPixelPacket(image,&bias);
584 SetMagickPixelPacketBias(image,&bias);
585 image_view=AcquireCacheView(image);
586 edge_view=AcquireCacheView(edge_image);
587 sharp_view=AcquireCacheView(sharp_image);
588 #if defined(MAGICKCORE_OPENMP_SUPPORT)
589 #pragma omp parallel for schedule(dynamic,4) shared(progress,status)
591 for (y=0; y < (ssize_t) sharp_image->rows; y++)
593 register const IndexPacket
596 register const PixelPacket
601 *restrict sharp_indexes;
609 if (status == MagickFalse)
611 r=GetCacheViewVirtualPixels(edge_view,0,y,edge_image->columns,1,exception);
612 q=QueueCacheViewAuthenticPixels(sharp_view,0,y,sharp_image->columns,1,
614 if ((r == (const PixelPacket *) NULL) || (q == (PixelPacket *) NULL))
619 sharp_indexes=GetCacheViewAuthenticIndexQueue(sharp_view);
620 for (x=0; x < (ssize_t) sharp_image->columns; x++)
629 register const double
638 i=(ssize_t) ceil((double) width*(QuantumRange-QuantumScale*
639 PixelIntensity(r))-0.5);
643 if (i > (ssize_t) width)
647 p=GetCacheViewVirtualPixels(image_view,x-((ssize_t) (width-i)/2L),y-
648 (ssize_t) ((width-i)/2L),width-i,width-i,exception);
649 if (p == (const PixelPacket *) NULL)
651 indexes=GetCacheViewVirtualIndexQueue(image_view);
654 for (v=0; v < (ssize_t) (width-i); v++)
656 for (u=0; u < (ssize_t) (width-i); u++)
659 if (((channel & OpacityChannel) != 0) &&
660 (image->matte != MagickFalse))
661 alpha=(MagickRealType) (QuantumScale*GetAlphaPixelComponent(p));
662 if ((channel & RedChannel) != 0)
663 pixel.red+=(*k)*alpha*GetRedPixelComponent(p);
664 if ((channel & GreenChannel) != 0)
665 pixel.green+=(*k)*alpha*GetGreenPixelComponent(p);
666 if ((channel & BlueChannel) != 0)
667 pixel.blue+=(*k)*alpha*GetBluePixelComponent(p);
668 if ((channel & OpacityChannel) != 0)
669 pixel.opacity+=(*k)*GetOpacityPixelComponent(p);
670 if (((channel & IndexChannel) != 0) &&
671 (image->colorspace == CMYKColorspace))
672 pixel.index+=(*k)*alpha*indexes[x+(width-i)*v+u];
678 gamma=1.0/(fabs((double) gamma) <= MagickEpsilon ? 1.0 : gamma);
679 if ((channel & RedChannel) != 0)
680 q->red=ClampToQuantum(gamma*GetRedPixelComponent(&pixel));
681 if ((channel & GreenChannel) != 0)
682 q->green=ClampToQuantum(gamma*GetGreenPixelComponent(&pixel));
683 if ((channel & BlueChannel) != 0)
684 q->blue=ClampToQuantum(gamma*GetBluePixelComponent(&pixel));
685 if ((channel & OpacityChannel) != 0)
686 SetOpacityPixelComponent(q,ClampOpacityPixelComponent(&pixel));
687 if (((channel & IndexChannel) != 0) &&
688 (image->colorspace == CMYKColorspace))
689 sharp_indexes[x]=ClampToQuantum(gamma*GetIndexPixelComponent(&pixel));
693 if (SyncCacheViewAuthenticPixels(sharp_view,exception) == MagickFalse)
695 if (image->progress_monitor != (MagickProgressMonitor) NULL)
700 #if defined(MAGICKCORE_OPENMP_SUPPORT)
701 #pragma omp critical (MagickCore_AdaptiveSharpenImageChannel)
703 proceed=SetImageProgress(image,AdaptiveSharpenImageTag,progress++,
705 if (proceed == MagickFalse)
709 sharp_image->type=image->type;
710 sharp_view=DestroyCacheView(sharp_view);
711 edge_view=DestroyCacheView(edge_view);
712 image_view=DestroyCacheView(image_view);
713 edge_image=DestroyImage(edge_image);
714 for (i=0; i < (ssize_t) width; i+=2)
715 kernel[i]=(double *) RelinquishMagickMemory(kernel[i]);
716 kernel=(double **) RelinquishMagickMemory(kernel);
717 if (status == MagickFalse)
718 sharp_image=DestroyImage(sharp_image);
723 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
727 % B l u r I m a g e %
731 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
733 % BlurImage() blurs an image. We convolve the image with a Gaussian operator
734 % of the given radius and standard deviation (sigma). For reasonable results,
735 % the radius should be larger than sigma. Use a radius of 0 and BlurImage()
736 % selects a suitable radius for you.
738 % BlurImage() differs from GaussianBlurImage() in that it uses a separable
739 % kernel which is faster but mathematically equivalent to the non-separable
742 % The format of the BlurImage method is:
744 % Image *BlurImage(const Image *image,const double radius,
745 % const double sigma,ExceptionInfo *exception)
746 % Image *BlurImageChannel(const Image *image,const ChannelType channel,
747 % const double radius,const double sigma,ExceptionInfo *exception)
749 % A description of each parameter follows:
751 % o image: the image.
753 % o channel: the channel type.
755 % o radius: the radius of the Gaussian, in pixels, not counting the center
758 % o sigma: the standard deviation of the Gaussian, in pixels.
760 % o exception: return any errors or warnings in this structure.
764 MagickExport Image *BlurImage(const Image *image,const double radius,
765 const double sigma,ExceptionInfo *exception)
770 blur_image=BlurImageChannel(image,DefaultChannels,radius,sigma,exception);
774 static double *GetBlurKernel(const size_t width,const double sigma)
788 Generate a 1-D convolution kernel.
790 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"...");
791 kernel=(double *) AcquireQuantumMemory((size_t) width,sizeof(*kernel));
792 if (kernel == (double *) NULL)
797 for (k=(-j); k <= j; k++)
799 kernel[i]=exp(-((double) k*k)/(2.0*MagickSigma*MagickSigma))/
800 (MagickSQ2PI*MagickSigma);
801 normalize+=kernel[i];
804 for (i=0; i < (ssize_t) width; i++)
805 kernel[i]/=normalize;
809 MagickExport Image *BlurImageChannel(const Image *image,
810 const ChannelType channel,const double radius,const double sigma,
811 ExceptionInfo *exception)
813 #define BlurImageTag "Blur/Image"
845 Initialize blur image attributes.
847 assert(image != (Image *) NULL);
848 assert(image->signature == MagickSignature);
849 if (image->debug != MagickFalse)
850 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
851 assert(exception != (ExceptionInfo *) NULL);
852 assert(exception->signature == MagickSignature);
853 blur_image=CloneImage(image,0,0,MagickTrue,exception);
854 if (blur_image == (Image *) NULL)
855 return((Image *) NULL);
856 if (fabs(sigma) <= MagickEpsilon)
858 if (SetImageStorageClass(blur_image,DirectClass) == MagickFalse)
860 InheritException(exception,&blur_image->exception);
861 blur_image=DestroyImage(blur_image);
862 return((Image *) NULL);
864 width=GetOptimalKernelWidth1D(radius,sigma);
865 kernel=GetBlurKernel(width,sigma);
866 if (kernel == (double *) NULL)
868 blur_image=DestroyImage(blur_image);
869 ThrowImageException(ResourceLimitError,"MemoryAllocationFailed");
871 if (image->debug != MagickFalse)
874 format[MaxTextExtent],
877 register const double
880 (void) LogMagickEvent(TransformEvent,GetMagickModule(),
881 " BlurImage with %.20g kernel:",(double) width);
882 message=AcquireString("");
884 for (i=0; i < (ssize_t) width; i++)
887 (void) FormatMagickString(format,MaxTextExtent,"%.20g: ",(double) i);
888 (void) ConcatenateString(&message,format);
889 (void) FormatMagickString(format,MaxTextExtent,"%g ",*k++);
890 (void) ConcatenateString(&message,format);
891 (void) LogMagickEvent(TransformEvent,GetMagickModule(),"%s",message);
893 message=DestroyString(message);
900 GetMagickPixelPacket(image,&bias);
901 SetMagickPixelPacketBias(image,&bias);
902 image_view=AcquireCacheView(image);
903 blur_view=AcquireCacheView(blur_image);
904 #if defined(MAGICKCORE_OPENMP_SUPPORT)
905 #pragma omp parallel for schedule(dynamic,4) shared(progress,status)
907 for (y=0; y < (ssize_t) blur_image->rows; y++)
909 register const IndexPacket
912 register const PixelPacket
916 *restrict blur_indexes;
924 if (status == MagickFalse)
926 p=GetCacheViewVirtualPixels(image_view,-((ssize_t) width/2L),y,
927 image->columns+width,1,exception);
928 q=GetCacheViewAuthenticPixels(blur_view,0,y,blur_image->columns,1,
930 if ((p == (const PixelPacket *) NULL) || (q == (PixelPacket *) NULL))
935 indexes=GetCacheViewVirtualIndexQueue(image_view);
936 blur_indexes=GetCacheViewAuthenticIndexQueue(blur_view);
937 for (x=0; x < (ssize_t) blur_image->columns; x++)
942 register const double
945 register const PixelPacket
946 *restrict kernel_pixels;
954 if (((channel & OpacityChannel) == 0) || (image->matte == MagickFalse))
956 for (i=0; i < (ssize_t) width; i++)
958 pixel.red+=(*k)*kernel_pixels->red;
959 pixel.green+=(*k)*kernel_pixels->green;
960 pixel.blue+=(*k)*kernel_pixels->blue;
964 if ((channel & RedChannel) != 0)
965 SetRedPixelComponent(q,ClampRedPixelComponent(&pixel));
966 if ((channel & GreenChannel) != 0)
967 SetGreenPixelComponent(q,ClampGreenPixelComponent(&pixel));
968 if ((channel & BlueChannel) != 0)
969 SetBluePixelComponent(q,ClampBluePixelComponent(&pixel));
970 if ((channel & OpacityChannel) != 0)
974 for (i=0; i < (ssize_t) width; i++)
976 pixel.opacity+=(*k)*kernel_pixels->opacity;
980 SetOpacityPixelComponent(q,ClampOpacityPixelComponent(&pixel));
982 if (((channel & IndexChannel) != 0) &&
983 (image->colorspace == CMYKColorspace))
985 register const IndexPacket
986 *restrict kernel_indexes;
989 kernel_indexes=indexes;
990 for (i=0; i < (ssize_t) width; i++)
992 pixel.index+=(*k)*(*kernel_indexes);
996 blur_indexes[x]=ClampToQuantum(pixel.index);
1006 for (i=0; i < (ssize_t) width; i++)
1008 alpha=(MagickRealType) (QuantumScale*
1009 GetAlphaPixelComponent(kernel_pixels));
1010 pixel.red+=(*k)*alpha*kernel_pixels->red;
1011 pixel.green+=(*k)*alpha*kernel_pixels->green;
1012 pixel.blue+=(*k)*alpha*kernel_pixels->blue;
1017 gamma=1.0/(fabs((double) gamma) <= MagickEpsilon ? 1.0 : gamma);
1018 if ((channel & RedChannel) != 0)
1019 q->red=ClampToQuantum(gamma*GetRedPixelComponent(&pixel));
1020 if ((channel & GreenChannel) != 0)
1021 q->green=ClampToQuantum(gamma*GetGreenPixelComponent(&pixel));
1022 if ((channel & BlueChannel) != 0)
1023 q->blue=ClampToQuantum(gamma*GetBluePixelComponent(&pixel));
1024 if ((channel & OpacityChannel) != 0)
1028 for (i=0; i < (ssize_t) width; i++)
1030 pixel.opacity+=(*k)*kernel_pixels->opacity;
1034 SetOpacityPixelComponent(q,ClampOpacityPixelComponent(&pixel));
1036 if (((channel & IndexChannel) != 0) &&
1037 (image->colorspace == CMYKColorspace))
1039 register const IndexPacket
1040 *restrict kernel_indexes;
1044 kernel_indexes=indexes;
1045 for (i=0; i < (ssize_t) width; i++)
1047 alpha=(MagickRealType) (QuantumScale*
1048 GetAlphaPixelComponent(kernel_pixels));
1049 pixel.index+=(*k)*alpha*(*kernel_indexes);
1054 blur_indexes[x]=ClampToQuantum(gamma*
1055 GetIndexPixelComponent(&pixel));
1061 if (SyncCacheViewAuthenticPixels(blur_view,exception) == MagickFalse)
1063 if (image->progress_monitor != (MagickProgressMonitor) NULL)
1068 #if defined(MAGICKCORE_OPENMP_SUPPORT)
1069 #pragma omp critical (MagickCore_BlurImageChannel)
1071 proceed=SetImageProgress(image,BlurImageTag,progress++,blur_image->rows+
1072 blur_image->columns);
1073 if (proceed == MagickFalse)
1077 blur_view=DestroyCacheView(blur_view);
1078 image_view=DestroyCacheView(image_view);
1082 image_view=AcquireCacheView(blur_image);
1083 blur_view=AcquireCacheView(blur_image);
1084 #if defined(MAGICKCORE_OPENMP_SUPPORT)
1085 #pragma omp parallel for schedule(dynamic,4) shared(progress,status)
1087 for (x=0; x < (ssize_t) blur_image->columns; x++)
1089 register const IndexPacket
1092 register const PixelPacket
1095 register IndexPacket
1096 *restrict blur_indexes;
1098 register PixelPacket
1104 if (status == MagickFalse)
1106 p=GetCacheViewVirtualPixels(image_view,x,-((ssize_t) width/2L),1,
1107 image->rows+width,exception);
1108 q=GetCacheViewAuthenticPixels(blur_view,x,0,1,blur_image->rows,exception);
1109 if ((p == (const PixelPacket *) NULL) || (q == (PixelPacket *) NULL))
1114 indexes=GetCacheViewVirtualIndexQueue(image_view);
1115 blur_indexes=GetCacheViewAuthenticIndexQueue(blur_view);
1116 for (y=0; y < (ssize_t) blur_image->rows; y++)
1121 register const double
1124 register const PixelPacket
1125 *restrict kernel_pixels;
1133 if (((channel & OpacityChannel) == 0) || (image->matte == MagickFalse))
1135 for (i=0; i < (ssize_t) width; i++)
1137 pixel.red+=(*k)*kernel_pixels->red;
1138 pixel.green+=(*k)*kernel_pixels->green;
1139 pixel.blue+=(*k)*kernel_pixels->blue;
1143 if ((channel & RedChannel) != 0)
1144 SetRedPixelComponent(q,ClampRedPixelComponent(&pixel));
1145 if ((channel & GreenChannel) != 0)
1146 SetGreenPixelComponent(q,ClampGreenPixelComponent(&pixel));
1147 if ((channel & BlueChannel) != 0)
1148 SetBluePixelComponent(q,ClampBluePixelComponent(&pixel));
1149 if ((channel & OpacityChannel) != 0)
1153 for (i=0; i < (ssize_t) width; i++)
1155 pixel.opacity+=(*k)*kernel_pixels->opacity;
1159 SetOpacityPixelComponent(q,ClampOpacityPixelComponent(&pixel));
1161 if (((channel & IndexChannel) != 0) &&
1162 (image->colorspace == CMYKColorspace))
1164 register const IndexPacket
1165 *restrict kernel_indexes;
1168 kernel_indexes=indexes;
1169 for (i=0; i < (ssize_t) width; i++)
1171 pixel.index+=(*k)*(*kernel_indexes);
1175 blur_indexes[y]=ClampToQuantum(pixel.index);
1185 for (i=0; i < (ssize_t) width; i++)
1187 alpha=(MagickRealType) (QuantumScale*
1188 GetAlphaPixelComponent(kernel_pixels));
1189 pixel.red+=(*k)*alpha*kernel_pixels->red;
1190 pixel.green+=(*k)*alpha*kernel_pixels->green;
1191 pixel.blue+=(*k)*alpha*kernel_pixels->blue;
1196 gamma=1.0/(fabs((double) gamma) <= MagickEpsilon ? 1.0 : gamma);
1197 if ((channel & RedChannel) != 0)
1198 q->red=ClampToQuantum(gamma*GetRedPixelComponent(&pixel));
1199 if ((channel & GreenChannel) != 0)
1200 q->green=ClampToQuantum(gamma*GetGreenPixelComponent(&pixel));
1201 if ((channel & BlueChannel) != 0)
1202 q->blue=ClampToQuantum(gamma*GetBluePixelComponent(&pixel));
1203 if ((channel & OpacityChannel) != 0)
1207 for (i=0; i < (ssize_t) width; i++)
1209 pixel.opacity+=(*k)*kernel_pixels->opacity;
1213 SetOpacityPixelComponent(q,ClampOpacityPixelComponent(&pixel));
1215 if (((channel & IndexChannel) != 0) &&
1216 (image->colorspace == CMYKColorspace))
1218 register const IndexPacket
1219 *restrict kernel_indexes;
1223 kernel_indexes=indexes;
1224 for (i=0; i < (ssize_t) width; i++)
1226 alpha=(MagickRealType) (QuantumScale*
1227 GetAlphaPixelComponent(kernel_pixels));
1228 pixel.index+=(*k)*alpha*(*kernel_indexes);
1233 blur_indexes[y]=ClampToQuantum(gamma*
1234 GetIndexPixelComponent(&pixel));
1240 if (SyncCacheViewAuthenticPixels(blur_view,exception) == MagickFalse)
1242 if (image->progress_monitor != (MagickProgressMonitor) NULL)
1247 #if defined(MAGICKCORE_OPENMP_SUPPORT)
1248 #pragma omp critical (MagickCore_BlurImageChannel)
1250 proceed=SetImageProgress(image,BlurImageTag,progress++,blur_image->rows+
1251 blur_image->columns);
1252 if (proceed == MagickFalse)
1256 blur_view=DestroyCacheView(blur_view);
1257 image_view=DestroyCacheView(image_view);
1258 kernel=(double *) RelinquishMagickMemory(kernel);
1259 if (status == MagickFalse)
1260 blur_image=DestroyImage(blur_image);
1261 blur_image->type=image->type;
1266 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1270 % C o n v o l v e I m a g e %
1274 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1276 % ConvolveImage() applies a custom convolution kernel to the image.
1278 % The format of the ConvolveImage method is:
1280 % Image *ConvolveImage(const Image *image,const size_t order,
1281 % const double *kernel,ExceptionInfo *exception)
1282 % Image *ConvolveImageChannel(const Image *image,const ChannelType channel,
1283 % const size_t order,const double *kernel,ExceptionInfo *exception)
1285 % A description of each parameter follows:
1287 % o image: the image.
1289 % o channel: the channel type.
1291 % o order: the number of columns and rows in the filter kernel.
1293 % o kernel: An array of double representing the convolution kernel.
1295 % o exception: return any errors or warnings in this structure.
1299 MagickExport Image *ConvolveImage(const Image *image,const size_t order,
1300 const double *kernel,ExceptionInfo *exception)
1305 convolve_image=ConvolveImageChannel(image,DefaultChannels,order,kernel,
1307 return(convolve_image);
1310 MagickExport Image *ConvolveImageChannel(const Image *image,
1311 const ChannelType channel,const size_t order,const double *kernel,
1312 ExceptionInfo *exception)
1314 #define ConvolveImageTag "Convolve/Image"
1348 Initialize convolve image attributes.
1350 assert(image != (Image *) NULL);
1351 assert(image->signature == MagickSignature);
1352 if (image->debug != MagickFalse)
1353 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
1354 assert(exception != (ExceptionInfo *) NULL);
1355 assert(exception->signature == MagickSignature);
1357 if ((width % 2) == 0)
1358 ThrowImageException(OptionError,"KernelWidthMustBeAnOddNumber");
1359 convolve_image=CloneImage(image,0,0,MagickTrue,exception);
1360 if (convolve_image == (Image *) NULL)
1361 return((Image *) NULL);
1362 if (SetImageStorageClass(convolve_image,DirectClass) == MagickFalse)
1364 InheritException(exception,&convolve_image->exception);
1365 convolve_image=DestroyImage(convolve_image);
1366 return((Image *) NULL);
1368 if (image->debug != MagickFalse)
1371 format[MaxTextExtent],
1374 register const double
1381 (void) LogMagickEvent(TransformEvent,GetMagickModule(),
1382 " ConvolveImage with %.20gx%.20g kernel:",(double) width,(double)
1384 message=AcquireString("");
1386 for (v=0; v < (ssize_t) width; v++)
1389 (void) FormatMagickString(format,MaxTextExtent,"%.20g: ",(double) v);
1390 (void) ConcatenateString(&message,format);
1391 for (u=0; u < (ssize_t) width; u++)
1393 (void) FormatMagickString(format,MaxTextExtent,"%g ",*k++);
1394 (void) ConcatenateString(&message,format);
1396 (void) LogMagickEvent(TransformEvent,GetMagickModule(),"%s",message);
1398 message=DestroyString(message);
1403 normal_kernel=(double *) AcquireQuantumMemory(width*width,
1404 sizeof(*normal_kernel));
1405 if (normal_kernel == (double *) NULL)
1407 convolve_image=DestroyImage(convolve_image);
1408 ThrowImageException(ResourceLimitError,"MemoryAllocationFailed");
1411 for (i=0; i < (ssize_t) (width*width); i++)
1413 gamma=1.0/(fabs((double) gamma) <= MagickEpsilon ? 1.0 : gamma);
1414 for (i=0; i < (ssize_t) (width*width); i++)
1415 normal_kernel[i]=gamma*kernel[i];
1421 GetMagickPixelPacket(image,&bias);
1422 SetMagickPixelPacketBias(image,&bias);
1423 image_view=AcquireCacheView(image);
1424 convolve_view=AcquireCacheView(convolve_image);
1425 #if defined(MAGICKCORE_OPENMP_SUPPORT)
1426 #pragma omp parallel for schedule(dynamic,4) shared(progress,status)
1428 for (y=0; y < (ssize_t) image->rows; y++)
1433 register const IndexPacket
1436 register const PixelPacket
1439 register IndexPacket
1440 *restrict convolve_indexes;
1442 register PixelPacket
1448 if (status == MagickFalse)
1450 p=GetCacheViewVirtualPixels(image_view,-((ssize_t) width/2L),y-(ssize_t)
1451 (width/2L),image->columns+width,width,exception);
1452 q=GetCacheViewAuthenticPixels(convolve_view,0,y,convolve_image->columns,1,
1454 if ((p == (const PixelPacket *) NULL) || (q == (PixelPacket *) NULL))
1459 indexes=GetCacheViewVirtualIndexQueue(image_view);
1460 convolve_indexes=GetCacheViewAuthenticIndexQueue(convolve_view);
1461 for (x=0; x < (ssize_t) image->columns; x++)
1466 register const double
1469 register const PixelPacket
1470 *restrict kernel_pixels;
1481 if (((channel & OpacityChannel) == 0) || (image->matte == MagickFalse))
1483 for (v=0; v < (ssize_t) width; v++)
1485 for (u=0; u < (ssize_t) width; u++)
1487 pixel.red+=(*k)*kernel_pixels[u].red;
1488 pixel.green+=(*k)*kernel_pixels[u].green;
1489 pixel.blue+=(*k)*kernel_pixels[u].blue;
1492 kernel_pixels+=image->columns+width;
1494 if ((channel & RedChannel) != 0)
1495 SetRedPixelComponent(q,ClampRedPixelComponent(&pixel));
1496 if ((channel & GreenChannel) != 0)
1497 SetGreenPixelComponent(q,ClampGreenPixelComponent(&pixel));
1498 if ((channel & BlueChannel) != 0)
1499 SetBluePixelComponent(q,ClampBluePixelComponent(&pixel));
1500 if ((channel & OpacityChannel) != 0)
1504 for (v=0; v < (ssize_t) width; v++)
1506 for (u=0; u < (ssize_t) width; u++)
1508 pixel.opacity+=(*k)*kernel_pixels[u].opacity;
1511 kernel_pixels+=image->columns+width;
1513 SetOpacityPixelComponent(q,ClampOpacityPixelComponent(&pixel));
1515 if (((channel & IndexChannel) != 0) &&
1516 (image->colorspace == CMYKColorspace))
1518 register const IndexPacket
1519 *restrict kernel_indexes;
1522 kernel_indexes=indexes;
1523 for (v=0; v < (ssize_t) width; v++)
1525 for (u=0; u < (ssize_t) width; u++)
1527 pixel.index+=(*k)*kernel_indexes[u];
1530 kernel_indexes+=image->columns+width;
1532 convolve_indexes[x]=ClampToQuantum(pixel.index);
1542 for (v=0; v < (ssize_t) width; v++)
1544 for (u=0; u < (ssize_t) width; u++)
1546 alpha=(MagickRealType) (QuantumScale*(QuantumRange-
1547 kernel_pixels[u].opacity));
1548 pixel.red+=(*k)*alpha*kernel_pixels[u].red;
1549 pixel.green+=(*k)*alpha*kernel_pixels[u].green;
1550 pixel.blue+=(*k)*alpha*kernel_pixels[u].blue;
1554 kernel_pixels+=image->columns+width;
1556 gamma=1.0/(fabs((double) gamma) <= MagickEpsilon ? 1.0 : gamma);
1557 if ((channel & RedChannel) != 0)
1558 q->red=ClampToQuantum(gamma*GetRedPixelComponent(&pixel));
1559 if ((channel & GreenChannel) != 0)
1560 q->green=ClampToQuantum(gamma*GetGreenPixelComponent(&pixel));
1561 if ((channel & BlueChannel) != 0)
1562 q->blue=ClampToQuantum(gamma*GetBluePixelComponent(&pixel));
1563 if ((channel & OpacityChannel) != 0)
1567 for (v=0; v < (ssize_t) width; v++)
1569 for (u=0; u < (ssize_t) width; u++)
1571 pixel.opacity+=(*k)*kernel_pixels[u].opacity;
1574 kernel_pixels+=image->columns+width;
1576 SetOpacityPixelComponent(q,ClampOpacityPixelComponent(&pixel));
1578 if (((channel & IndexChannel) != 0) &&
1579 (image->colorspace == CMYKColorspace))
1581 register const IndexPacket
1582 *restrict kernel_indexes;
1586 kernel_indexes=indexes;
1587 for (v=0; v < (ssize_t) width; v++)
1589 for (u=0; u < (ssize_t) width; u++)
1591 alpha=(MagickRealType) (QuantumScale*(QuantumRange-
1592 kernel_pixels[u].opacity));
1593 pixel.index+=(*k)*alpha*kernel_indexes[u];
1596 kernel_pixels+=image->columns+width;
1597 kernel_indexes+=image->columns+width;
1599 convolve_indexes[x]=ClampToQuantum(gamma*
1600 GetIndexPixelComponent(&pixel));
1606 sync=SyncCacheViewAuthenticPixels(convolve_view,exception);
1607 if (sync == MagickFalse)
1609 if (image->progress_monitor != (MagickProgressMonitor) NULL)
1614 #if defined(MAGICKCORE_OPENMP_SUPPORT)
1615 #pragma omp critical (MagickCore_ConvolveImageChannel)
1617 proceed=SetImageProgress(image,ConvolveImageTag,progress++,image->rows);
1618 if (proceed == MagickFalse)
1622 convolve_image->type=image->type;
1623 convolve_view=DestroyCacheView(convolve_view);
1624 image_view=DestroyCacheView(image_view);
1625 normal_kernel=(double *) RelinquishMagickMemory(normal_kernel);
1626 if (status == MagickFalse)
1627 convolve_image=DestroyImage(convolve_image);
1628 return(convolve_image);
1632 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1636 % D e s p e c k l e I m a g e %
1640 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1642 % DespeckleImage() reduces the speckle noise in an image while perserving the
1643 % edges of the original image.
1645 % The format of the DespeckleImage method is:
1647 % Image *DespeckleImage(const Image *image,ExceptionInfo *exception)
1649 % A description of each parameter follows:
1651 % o image: the image.
1653 % o exception: return any errors or warnings in this structure.
1657 static Quantum **DestroyPixelThreadSet(Quantum **pixels)
1662 assert(pixels != (Quantum **) NULL);
1663 for (i=0; i < (ssize_t) GetOpenMPMaximumThreads(); i++)
1664 if (pixels[i] != (Quantum *) NULL)
1665 pixels[i]=(Quantum *) RelinquishMagickMemory(pixels[i]);
1666 pixels=(Quantum **) RelinquishAlignedMemory(pixels);
1670 static Quantum **AcquirePixelThreadSet(const size_t count)
1681 number_threads=GetOpenMPMaximumThreads();
1682 pixels=(Quantum **) AcquireAlignedMemory(number_threads,sizeof(*pixels));
1683 if (pixels == (Quantum **) NULL)
1684 return((Quantum **) NULL);
1685 (void) ResetMagickMemory(pixels,0,number_threads*sizeof(*pixels));
1686 for (i=0; i < (ssize_t) number_threads; i++)
1688 pixels[i]=(Quantum *) AcquireQuantumMemory(count,sizeof(**pixels));
1689 if (pixels[i] == (Quantum *) NULL)
1690 return(DestroyPixelThreadSet(pixels));
1695 static void Hull(const ssize_t x_offset,const ssize_t y_offset,
1696 const size_t columns,const size_t rows,Quantum *f,Quantum *g,
1714 assert(f != (Quantum *) NULL);
1715 assert(g != (Quantum *) NULL);
1718 r=p+(y_offset*((ssize_t) columns+2)+x_offset);
1719 for (y=0; y < (ssize_t) rows; y++)
1725 for (x=(ssize_t) columns; x != 0; x--)
1727 v=(MagickRealType) (*p);
1728 if ((MagickRealType) *r >= (v+(MagickRealType) ScaleCharToQuantum(2)))
1729 v+=ScaleCharToQuantum(1);
1736 for (x=(ssize_t) columns; x != 0; x--)
1738 v=(MagickRealType) (*p);
1739 if ((MagickRealType) *r <= (v-(MagickRealType) ScaleCharToQuantum(2)))
1740 v-=(ssize_t) ScaleCharToQuantum(1);
1752 r=q+(y_offset*((ssize_t) columns+2)+x_offset);
1753 s=q-(y_offset*((ssize_t) columns+2)+x_offset);
1754 for (y=0; y < (ssize_t) rows; y++)
1761 for (x=(ssize_t) columns; x != 0; x--)
1763 v=(MagickRealType) (*q);
1764 if (((MagickRealType) *s >=
1765 (v+(MagickRealType) ScaleCharToQuantum(2))) &&
1766 ((MagickRealType) *r > v))
1767 v+=ScaleCharToQuantum(1);
1775 for (x=(ssize_t) columns; x != 0; x--)
1777 v=(MagickRealType) (*q);
1778 if (((MagickRealType) *s <=
1779 (v-(MagickRealType) ScaleCharToQuantum(2))) &&
1780 ((MagickRealType) *r < v))
1781 v-=(MagickRealType) ScaleCharToQuantum(1);
1795 MagickExport Image *DespeckleImage(const Image *image,ExceptionInfo *exception)
1797 #define DespeckleImageTag "Despeckle/Image"
1819 static const ssize_t
1820 X[4] = {0, 1, 1,-1},
1821 Y[4] = {1, 0, 1, 1};
1824 Allocate despeckled image.
1826 assert(image != (const Image *) NULL);
1827 assert(image->signature == MagickSignature);
1828 if (image->debug != MagickFalse)
1829 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
1830 assert(exception != (ExceptionInfo *) NULL);
1831 assert(exception->signature == MagickSignature);
1832 despeckle_image=CloneImage(image,image->columns,image->rows,MagickTrue,
1834 if (despeckle_image == (Image *) NULL)
1835 return((Image *) NULL);
1836 if (SetImageStorageClass(despeckle_image,DirectClass) == MagickFalse)
1838 InheritException(exception,&despeckle_image->exception);
1839 despeckle_image=DestroyImage(despeckle_image);
1840 return((Image *) NULL);
1843 Allocate image buffers.
1845 length=(size_t) ((image->columns+2)*(image->rows+2));
1846 pixels=AcquirePixelThreadSet(length);
1847 buffers=AcquirePixelThreadSet(length);
1848 if ((pixels == (Quantum **) NULL) || (buffers == (Quantum **) NULL))
1850 if (buffers != (Quantum **) NULL)
1851 buffers=DestroyPixelThreadSet(buffers);
1852 if (pixels != (Quantum **) NULL)
1853 pixels=DestroyPixelThreadSet(pixels);
1854 despeckle_image=DestroyImage(despeckle_image);
1855 ThrowImageException(ResourceLimitError,"MemoryAllocationFailed");
1858 Reduce speckle in the image.
1861 image_view=AcquireCacheView(image);
1862 despeckle_view=AcquireCacheView(despeckle_image);
1863 #if defined(MAGICKCORE_OPENMP_SUPPORT)
1864 #pragma omp parallel for schedule(dynamic,4) shared(status)
1866 for (channel=0; channel <= 3; channel++)
1883 if (status == MagickFalse)
1885 id=GetOpenMPThreadId();
1887 (void) ResetMagickMemory(pixel,0,length*sizeof(*pixel));
1889 j=(ssize_t) image->columns+2;
1890 for (y=0; y < (ssize_t) image->rows; y++)
1892 register const PixelPacket
1895 p=GetCacheViewVirtualPixels(image_view,0,y,image->columns,1,exception);
1896 if (p == (const PixelPacket *) NULL)
1899 for (x=0; x < (ssize_t) image->columns; x++)
1903 case 0: pixel[j]=GetRedPixelComponent(p); break;
1904 case 1: pixel[j]=GetGreenPixelComponent(p); break;
1905 case 2: pixel[j]=GetBluePixelComponent(p); break;
1906 case 3: pixel[j]=GetOpacityPixelComponent(p); break;
1914 (void) ResetMagickMemory(buffer,0,length*sizeof(*buffer));
1915 for (i=0; i < 4; i++)
1917 Hull(X[i],Y[i],image->columns,image->rows,pixel,buffer,1);
1918 Hull(-X[i],-Y[i],image->columns,image->rows,pixel,buffer,1);
1919 Hull(-X[i],-Y[i],image->columns,image->rows,pixel,buffer,-1);
1920 Hull(X[i],Y[i],image->columns,image->rows,pixel,buffer,-1);
1922 j=(ssize_t) image->columns+2;
1923 for (y=0; y < (ssize_t) image->rows; y++)
1928 register PixelPacket
1931 q=GetCacheViewAuthenticPixels(despeckle_view,0,y,despeckle_image->columns,
1933 if (q == (PixelPacket *) NULL)
1936 for (x=0; x < (ssize_t) image->columns; x++)
1940 case 0: q->red=pixel[j]; break;
1941 case 1: q->green=pixel[j]; break;
1942 case 2: q->blue=pixel[j]; break;
1943 case 3: q->opacity=pixel[j]; break;
1949 sync=SyncCacheViewAuthenticPixels(despeckle_view,exception);
1950 if (sync == MagickFalse)
1957 if (image->progress_monitor != (MagickProgressMonitor) NULL)
1962 #if defined(MAGICKCORE_OPENMP_SUPPORT)
1963 #pragma omp critical (MagickCore_DespeckleImage)
1965 proceed=SetImageProgress(image,DespeckleImageTag,(MagickOffsetType)
1967 if (proceed == MagickFalse)
1971 despeckle_view=DestroyCacheView(despeckle_view);
1972 image_view=DestroyCacheView(image_view);
1973 buffers=DestroyPixelThreadSet(buffers);
1974 pixels=DestroyPixelThreadSet(pixels);
1975 despeckle_image->type=image->type;
1976 if (status == MagickFalse)
1977 despeckle_image=DestroyImage(despeckle_image);
1978 return(despeckle_image);
1982 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1986 % E d g e I m a g e %
1990 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1992 % EdgeImage() finds edges in an image. Radius defines the radius of the
1993 % convolution filter. Use a radius of 0 and EdgeImage() selects a suitable
1996 % The format of the EdgeImage method is:
1998 % Image *EdgeImage(const Image *image,const double radius,
1999 % ExceptionInfo *exception)
2001 % A description of each parameter follows:
2003 % o image: the image.
2005 % o radius: the radius of the pixel neighborhood.
2007 % o exception: return any errors or warnings in this structure.
2010 MagickExport Image *EdgeImage(const Image *image,const double radius,
2011 ExceptionInfo *exception)
2025 assert(image != (const Image *) NULL);
2026 assert(image->signature == MagickSignature);
2027 if (image->debug != MagickFalse)
2028 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
2029 assert(exception != (ExceptionInfo *) NULL);
2030 assert(exception->signature == MagickSignature);
2031 width=GetOptimalKernelWidth1D(radius,0.5);
2032 kernel=(double *) AcquireQuantumMemory((size_t) width,width*sizeof(*kernel));
2033 if (kernel == (double *) NULL)
2034 ThrowImageException(ResourceLimitError,"MemoryAllocationFailed");
2035 for (i=0; i < (ssize_t) (width*width); i++)
2037 kernel[i/2]=(double) (width*width-1.0);
2038 edge_image=ConvolveImage(image,width,kernel,exception);
2039 kernel=(double *) RelinquishMagickMemory(kernel);
2044 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
2048 % E m b o s s I m a g e %
2052 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
2054 % EmbossImage() returns a grayscale image with a three-dimensional effect.
2055 % We convolve the image with a Gaussian operator of the given radius and
2056 % standard deviation (sigma). For reasonable results, radius should be
2057 % larger than sigma. Use a radius of 0 and Emboss() selects a suitable
2060 % The format of the EmbossImage method is:
2062 % Image *EmbossImage(const Image *image,const double radius,
2063 % const double sigma,ExceptionInfo *exception)
2065 % A description of each parameter follows:
2067 % o image: the image.
2069 % o radius: the radius of the pixel neighborhood.
2071 % o sigma: the standard deviation of the Gaussian, in pixels.
2073 % o exception: return any errors or warnings in this structure.
2076 MagickExport Image *EmbossImage(const Image *image,const double radius,
2077 const double sigma,ExceptionInfo *exception)
2097 assert(image != (Image *) NULL);
2098 assert(image->signature == MagickSignature);
2099 if (image->debug != MagickFalse)
2100 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
2101 assert(exception != (ExceptionInfo *) NULL);
2102 assert(exception->signature == MagickSignature);
2103 width=GetOptimalKernelWidth2D(radius,sigma);
2104 kernel=(double *) AcquireQuantumMemory((size_t) width,width*sizeof(*kernel));
2105 if (kernel == (double *) NULL)
2106 ThrowImageException(ResourceLimitError,"MemoryAllocationFailed");
2107 j=(ssize_t) width/2;
2110 for (v=(-j); v <= j; v++)
2112 for (u=(-j); u <= j; u++)
2114 kernel[i]=((u < 0) || (v < 0) ? -8.0 : 8.0)*
2115 exp(-((double) u*u+v*v)/(2.0*MagickSigma*MagickSigma))/
2116 (2.0*MagickPI*MagickSigma*MagickSigma);
2123 emboss_image=ConvolveImage(image,width,kernel,exception);
2124 if (emboss_image != (Image *) NULL)
2125 (void) EqualizeImage(emboss_image);
2126 kernel=(double *) RelinquishMagickMemory(kernel);
2127 return(emboss_image);
2131 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
2135 % F i l t e r I m a g e %
2139 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
2141 % FilterImage() applies a custom convolution kernel to the image.
2143 % The format of the FilterImage method is:
2145 % Image *FilterImage(const Image *image,const KernelInfo *kernel,
2146 % ExceptionInfo *exception)
2147 % Image *FilterImageChannel(const Image *image,const ChannelType channel,
2148 % const KernelInfo *kernel,ExceptionInfo *exception)
2150 % A description of each parameter follows:
2152 % o image: the image.
2154 % o channel: the channel type.
2156 % o kernel: the filtering kernel.
2158 % o exception: return any errors or warnings in this structure.
2162 MagickExport Image *FilterImage(const Image *image,const KernelInfo *kernel,
2163 ExceptionInfo *exception)
2168 filter_image=FilterImageChannel(image,DefaultChannels,kernel,exception);
2169 return(filter_image);
2172 MagickExport Image *FilterImageChannel(const Image *image,
2173 const ChannelType channel,const KernelInfo *kernel,ExceptionInfo *exception)
2175 #define FilterImageTag "Filter/Image"
2197 Initialize filter image attributes.
2199 assert(image != (Image *) NULL);
2200 assert(image->signature == MagickSignature);
2201 if (image->debug != MagickFalse)
2202 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
2203 assert(exception != (ExceptionInfo *) NULL);
2204 assert(exception->signature == MagickSignature);
2205 if ((kernel->width % 2) == 0)
2206 ThrowImageException(OptionError,"KernelWidthMustBeAnOddNumber");
2207 filter_image=CloneImage(image,0,0,MagickTrue,exception);
2208 if (filter_image == (Image *) NULL)
2209 return((Image *) NULL);
2210 if (SetImageStorageClass(filter_image,DirectClass) == MagickFalse)
2212 InheritException(exception,&filter_image->exception);
2213 filter_image=DestroyImage(filter_image);
2214 return((Image *) NULL);
2216 if (image->debug != MagickFalse)
2219 format[MaxTextExtent],
2222 register const double
2229 (void) LogMagickEvent(TransformEvent,GetMagickModule(),
2230 " FilterImage with %.20gx%.20g kernel:",(double) kernel->width,(double)
2232 message=AcquireString("");
2234 for (v=0; v < (ssize_t) kernel->height; v++)
2237 (void) FormatMagickString(format,MaxTextExtent,"%.20g: ",(double) v);
2238 (void) ConcatenateString(&message,format);
2239 for (u=0; u < (ssize_t) kernel->width; u++)
2241 (void) FormatMagickString(format,MaxTextExtent,"%g ",*k++);
2242 (void) ConcatenateString(&message,format);
2244 (void) LogMagickEvent(TransformEvent,GetMagickModule(),"%s",message);
2246 message=DestroyString(message);
2248 status=AccelerateConvolveImage(image,kernel,filter_image,exception);
2249 if (status == MagickTrue)
2250 return(filter_image);
2256 GetMagickPixelPacket(image,&bias);
2257 SetMagickPixelPacketBias(image,&bias);
2258 image_view=AcquireCacheView(image);
2259 filter_view=AcquireCacheView(filter_image);
2260 #if defined(MAGICKCORE_OPENMP_SUPPORT)
2261 #pragma omp parallel for schedule(dynamic,4) shared(progress,status)
2263 for (y=0; y < (ssize_t) image->rows; y++)
2268 register const IndexPacket
2271 register const PixelPacket
2274 register IndexPacket
2275 *restrict filter_indexes;
2277 register PixelPacket
2283 if (status == MagickFalse)
2285 p=GetCacheViewVirtualPixels(image_view,-((ssize_t) kernel->width/2L),
2286 y-(ssize_t) (kernel->height/2L),image->columns+kernel->width,
2287 kernel->height,exception);
2288 q=GetCacheViewAuthenticPixels(filter_view,0,y,filter_image->columns,1,
2290 if ((p == (const PixelPacket *) NULL) || (q == (PixelPacket *) NULL))
2295 indexes=GetCacheViewVirtualIndexQueue(image_view);
2296 filter_indexes=GetCacheViewAuthenticIndexQueue(filter_view);
2297 for (x=0; x < (ssize_t) image->columns; x++)
2302 register const double
2305 register const PixelPacket
2306 *restrict kernel_pixels;
2317 if (((channel & OpacityChannel) == 0) || (image->matte == MagickFalse))
2319 for (v=0; v < (ssize_t) kernel->width; v++)
2321 for (u=0; u < (ssize_t) kernel->height; u++)
2323 pixel.red+=(*k)*kernel_pixels[u].red;
2324 pixel.green+=(*k)*kernel_pixels[u].green;
2325 pixel.blue+=(*k)*kernel_pixels[u].blue;
2328 kernel_pixels+=image->columns+kernel->width;
2330 if ((channel & RedChannel) != 0)
2331 SetRedPixelComponent(q,ClampRedPixelComponent(&pixel));
2332 if ((channel & GreenChannel) != 0)
2333 SetGreenPixelComponent(q,ClampGreenPixelComponent(&pixel));
2334 if ((channel & BlueChannel) != 0)
2335 SetBluePixelComponent(q,ClampBluePixelComponent(&pixel));
2336 if ((channel & OpacityChannel) != 0)
2340 for (v=0; v < (ssize_t) kernel->width; v++)
2342 for (u=0; u < (ssize_t) kernel->height; u++)
2344 pixel.opacity+=(*k)*kernel_pixels[u].opacity;
2347 kernel_pixels+=image->columns+kernel->width;
2349 SetOpacityPixelComponent(q,ClampOpacityPixelComponent(&pixel));
2351 if (((channel & IndexChannel) != 0) &&
2352 (image->colorspace == CMYKColorspace))
2354 register const IndexPacket
2355 *restrict kernel_indexes;
2358 kernel_indexes=indexes;
2359 for (v=0; v < (ssize_t) kernel->width; v++)
2361 for (u=0; u < (ssize_t) kernel->height; u++)
2363 pixel.index+=(*k)*kernel_indexes[u];
2366 kernel_indexes+=image->columns+kernel->width;
2368 filter_indexes[x]=ClampToQuantum(pixel.index);
2378 for (v=0; v < (ssize_t) kernel->width; v++)
2380 for (u=0; u < (ssize_t) kernel->height; u++)
2382 alpha=(MagickRealType) (QuantumScale*(QuantumRange-
2383 kernel_pixels[u].opacity));
2384 pixel.red+=(*k)*alpha*kernel_pixels[u].red;
2385 pixel.green+=(*k)*alpha*kernel_pixels[u].green;
2386 pixel.blue+=(*k)*alpha*kernel_pixels[u].blue;
2390 kernel_pixels+=image->columns+kernel->width;
2392 gamma=1.0/(fabs((double) gamma) <= MagickEpsilon ? 1.0 : gamma);
2393 if ((channel & RedChannel) != 0)
2394 q->red=ClampToQuantum(gamma*GetRedPixelComponent(&pixel));
2395 if ((channel & GreenChannel) != 0)
2396 q->green=ClampToQuantum(gamma*GetGreenPixelComponent(&pixel));
2397 if ((channel & BlueChannel) != 0)
2398 q->blue=ClampToQuantum(gamma*GetBluePixelComponent(&pixel));
2399 if ((channel & OpacityChannel) != 0)
2403 for (v=0; v < (ssize_t) kernel->width; v++)
2405 for (u=0; u < (ssize_t) kernel->height; u++)
2407 pixel.opacity+=(*k)*kernel_pixels[u].opacity;
2410 kernel_pixels+=image->columns+kernel->width;
2412 SetOpacityPixelComponent(q,ClampOpacityPixelComponent(&pixel));
2414 if (((channel & IndexChannel) != 0) &&
2415 (image->colorspace == CMYKColorspace))
2417 register const IndexPacket
2418 *restrict kernel_indexes;
2422 kernel_indexes=indexes;
2423 for (v=0; v < (ssize_t) kernel->width; v++)
2425 for (u=0; u < (ssize_t) kernel->height; u++)
2427 alpha=(MagickRealType) (QuantumScale*(QuantumRange-
2428 kernel_pixels[u].opacity));
2429 pixel.index+=(*k)*alpha*kernel_indexes[u];
2432 kernel_pixels+=image->columns+kernel->width;
2433 kernel_indexes+=image->columns+kernel->width;
2435 filter_indexes[x]=ClampToQuantum(gamma*
2436 GetIndexPixelComponent(&pixel));
2442 sync=SyncCacheViewAuthenticPixels(filter_view,exception);
2443 if (sync == MagickFalse)
2445 if (image->progress_monitor != (MagickProgressMonitor) NULL)
2450 #if defined(MAGICKCORE_OPENMP_SUPPORT)
2451 #pragma omp critical (MagickCore_FilterImageChannel)
2453 proceed=SetImageProgress(image,FilterImageTag,progress++,image->rows);
2454 if (proceed == MagickFalse)
2458 filter_image->type=image->type;
2459 filter_view=DestroyCacheView(filter_view);
2460 image_view=DestroyCacheView(image_view);
2461 if (status == MagickFalse)
2462 filter_image=DestroyImage(filter_image);
2463 return(filter_image);
2467 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
2471 % G a u s s i a n B l u r I m a g e %
2475 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
2477 % GaussianBlurImage() blurs an image. We convolve the image with a
2478 % Gaussian operator of the given radius and standard deviation (sigma).
2479 % For reasonable results, the radius should be larger than sigma. Use a
2480 % radius of 0 and GaussianBlurImage() selects a suitable radius for you
2482 % The format of the GaussianBlurImage method is:
2484 % Image *GaussianBlurImage(const Image *image,onst double radius,
2485 % const double sigma,ExceptionInfo *exception)
2486 % Image *GaussianBlurImageChannel(const Image *image,
2487 % const ChannelType channel,const double radius,const double sigma,
2488 % ExceptionInfo *exception)
2490 % A description of each parameter follows:
2492 % o image: the image.
2494 % o channel: the channel type.
2496 % o radius: the radius of the Gaussian, in pixels, not counting the center
2499 % o sigma: the standard deviation of the Gaussian, in pixels.
2501 % o exception: return any errors or warnings in this structure.
2505 MagickExport Image *GaussianBlurImage(const Image *image,const double radius,
2506 const double sigma,ExceptionInfo *exception)
2511 blur_image=GaussianBlurImageChannel(image,DefaultChannels,radius,sigma,
2516 MagickExport Image *GaussianBlurImageChannel(const Image *image,
2517 const ChannelType channel,const double radius,const double sigma,
2518 ExceptionInfo *exception)
2537 assert(image != (const Image *) NULL);
2538 assert(image->signature == MagickSignature);
2539 if (image->debug != MagickFalse)
2540 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
2541 assert(exception != (ExceptionInfo *) NULL);
2542 assert(exception->signature == MagickSignature);
2543 width=GetOptimalKernelWidth2D(radius,sigma);
2544 kernel=(double *) AcquireQuantumMemory((size_t) width,width*sizeof(*kernel));
2545 if (kernel == (double *) NULL)
2546 ThrowImageException(ResourceLimitError,"MemoryAllocationFailed");
2547 j=(ssize_t) width/2;
2549 for (v=(-j); v <= j; v++)
2551 for (u=(-j); u <= j; u++)
2552 kernel[i++]=exp(-((double) u*u+v*v)/(2.0*MagickSigma*MagickSigma))/
2553 (2.0*MagickPI*MagickSigma*MagickSigma);
2555 blur_image=ConvolveImageChannel(image,channel,width,kernel,exception);
2556 kernel=(double *) RelinquishMagickMemory(kernel);
2561 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
2565 % M e d i a n F i l t e r I m a g e %
2569 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
2571 % MedianFilterImage() applies a digital filter that improves the quality
2572 % of a noisy image. Each pixel is replaced by the median in a set of
2573 % neighboring pixels as defined by radius.
2575 % The algorithm was contributed by Mike Edmonds and implements an insertion
2576 % sort for selecting median color-channel values. For more on this algorithm
2577 % see "Skip Lists: A probabilistic Alternative to Balanced Trees" by William
2578 % Pugh in the June 1990 of Communications of the ACM.
2580 % The format of the MedianFilterImage method is:
2582 % Image *MedianFilterImage(const Image *image,const double radius,
2583 % ExceptionInfo *exception)
2585 % A description of each parameter follows:
2587 % o image: the image.
2589 % o radius: the radius of the pixel neighborhood.
2591 % o exception: return any errors or warnings in this structure.
2595 #define MedianListChannels 5
2597 typedef struct _MedianListNode
2605 typedef struct _MedianSkipList
2614 typedef struct _MedianPixelList
2622 lists[MedianListChannels];
2625 static MedianPixelList *DestroyMedianPixelList(MedianPixelList *pixel_list)
2630 if (pixel_list == (MedianPixelList *) NULL)
2631 return((MedianPixelList *) NULL);
2632 for (i=0; i < MedianListChannels; i++)
2633 if (pixel_list->lists[i].nodes != (MedianListNode *) NULL)
2634 pixel_list->lists[i].nodes=(MedianListNode *) RelinquishMagickMemory(
2635 pixel_list->lists[i].nodes);
2636 pixel_list=(MedianPixelList *) RelinquishAlignedMemory(pixel_list);
2640 static MedianPixelList **DestroyMedianPixelListThreadSet(
2641 MedianPixelList **pixel_list)
2646 assert(pixel_list != (MedianPixelList **) NULL);
2647 for (i=0; i < (ssize_t) GetOpenMPMaximumThreads(); i++)
2648 if (pixel_list[i] != (MedianPixelList *) NULL)
2649 pixel_list[i]=DestroyMedianPixelList(pixel_list[i]);
2650 pixel_list=(MedianPixelList **) RelinquishAlignedMemory(pixel_list);
2654 static MedianPixelList *AcquireMedianPixelList(const size_t width)
2662 pixel_list=(MedianPixelList *) AcquireAlignedMemory(1,sizeof(*pixel_list));
2663 if (pixel_list == (MedianPixelList *) NULL)
2665 (void) ResetMagickMemory((void *) pixel_list,0,sizeof(*pixel_list));
2666 pixel_list->center=width*width/2;
2667 for (i=0; i < MedianListChannels; i++)
2669 pixel_list->lists[i].nodes=(MedianListNode *) AcquireQuantumMemory(65537UL,
2670 sizeof(*pixel_list->lists[i].nodes));
2671 if (pixel_list->lists[i].nodes == (MedianListNode *) NULL)
2672 return(DestroyMedianPixelList(pixel_list));
2673 (void) ResetMagickMemory(pixel_list->lists[i].nodes,0,65537UL*
2674 sizeof(*pixel_list->lists[i].nodes));
2676 pixel_list->signature=MagickSignature;
2680 static MedianPixelList **AcquireMedianPixelListThreadSet(const size_t width)
2691 number_threads=GetOpenMPMaximumThreads();
2692 pixel_list=(MedianPixelList **) AcquireAlignedMemory(number_threads,
2693 sizeof(*pixel_list));
2694 if (pixel_list == (MedianPixelList **) NULL)
2695 return((MedianPixelList **) NULL);
2696 (void) ResetMagickMemory(pixel_list,0,number_threads*sizeof(*pixel_list));
2697 for (i=0; i < (ssize_t) number_threads; i++)
2699 pixel_list[i]=AcquireMedianPixelList(width);
2700 if (pixel_list[i] == (MedianPixelList *) NULL)
2701 return(DestroyMedianPixelListThreadSet(pixel_list));
2706 static void AddNodeMedianPixelList(MedianPixelList *pixel_list,
2707 const ssize_t channel,const size_t color)
2709 register MedianSkipList
2720 Initialize the node.
2722 list=pixel_list->lists+channel;
2723 list->nodes[color].signature=pixel_list->signature;
2724 list->nodes[color].count=1;
2726 Determine where it belongs in the list.
2729 for (level=list->level; level >= 0; level--)
2731 while (list->nodes[search].next[level] < color)
2732 search=list->nodes[search].next[level];
2733 update[level]=search;
2736 Generate a pseudo-random level for this node.
2738 for (level=0; ; level++)
2740 pixel_list->seed=(pixel_list->seed*42893621L)+1L;
2741 if ((pixel_list->seed & 0x300) != 0x300)
2746 if (level > (list->level+2))
2747 level=list->level+2;
2749 If we're raising the list's level, link back to the root node.
2751 while (level > list->level)
2754 update[list->level]=65536UL;
2757 Link the node into the skip-list.
2761 list->nodes[color].next[level]=list->nodes[update[level]].next[level];
2762 list->nodes[update[level]].next[level]=color;
2764 while (level-- > 0);
2767 static MagickPixelPacket GetMedianPixelList(MedianPixelList *pixel_list)
2772 register MedianSkipList
2784 channels[MedianListChannels];
2787 Find the median value for each of the color.
2789 center=pixel_list->center;
2790 for (channel=0; channel < 5; channel++)
2792 list=pixel_list->lists+channel;
2797 color=list->nodes[color].next[0];
2798 count+=list->nodes[color].count;
2800 while (count <= center);
2801 channels[channel]=(unsigned short) color;
2803 GetMagickPixelPacket((const Image *) NULL,&pixel);
2804 pixel.red=(MagickRealType) ScaleShortToQuantum(channels[0]);
2805 pixel.green=(MagickRealType) ScaleShortToQuantum(channels[1]);
2806 pixel.blue=(MagickRealType) ScaleShortToQuantum(channels[2]);
2807 pixel.opacity=(MagickRealType) ScaleShortToQuantum(channels[3]);
2808 pixel.index=(MagickRealType) ScaleShortToQuantum(channels[4]);
2812 static inline void InsertMedianPixelList(const Image *image,
2813 const PixelPacket *pixel,const IndexPacket *indexes,
2814 MedianPixelList *pixel_list)
2822 index=ScaleQuantumToShort(pixel->red);
2823 signature=pixel_list->lists[0].nodes[index].signature;
2824 if (signature == pixel_list->signature)
2825 pixel_list->lists[0].nodes[index].count++;
2827 AddNodeMedianPixelList(pixel_list,0,index);
2828 index=ScaleQuantumToShort(pixel->green);
2829 signature=pixel_list->lists[1].nodes[index].signature;
2830 if (signature == pixel_list->signature)
2831 pixel_list->lists[1].nodes[index].count++;
2833 AddNodeMedianPixelList(pixel_list,1,index);
2834 index=ScaleQuantumToShort(pixel->blue);
2835 signature=pixel_list->lists[2].nodes[index].signature;
2836 if (signature == pixel_list->signature)
2837 pixel_list->lists[2].nodes[index].count++;
2839 AddNodeMedianPixelList(pixel_list,2,index);
2840 index=ScaleQuantumToShort(pixel->opacity);
2841 signature=pixel_list->lists[3].nodes[index].signature;
2842 if (signature == pixel_list->signature)
2843 pixel_list->lists[3].nodes[index].count++;
2845 AddNodeMedianPixelList(pixel_list,3,index);
2846 if (image->colorspace == CMYKColorspace)
2847 index=ScaleQuantumToShort(*indexes);
2848 signature=pixel_list->lists[4].nodes[index].signature;
2849 if (signature == pixel_list->signature)
2850 pixel_list->lists[4].nodes[index].count++;
2852 AddNodeMedianPixelList(pixel_list,4,index);
2855 static void ResetMedianPixelList(MedianPixelList *pixel_list)
2860 register MedianListNode
2863 register MedianSkipList
2870 Reset the skip-list.
2872 for (channel=0; channel < 5; channel++)
2874 list=pixel_list->lists+channel;
2875 root=list->nodes+65536UL;
2877 for (level=0; level < 9; level++)
2878 root->next[level]=65536UL;
2880 pixel_list->seed=pixel_list->signature++;
2883 MagickExport Image *MedianFilterImage(const Image *image,const double radius,
2884 ExceptionInfo *exception)
2886 #define MedianFilterImageTag "MedianFilter/Image"
2902 **restrict pixel_list;
2911 Initialize median image attributes.
2913 assert(image != (Image *) NULL);
2914 assert(image->signature == MagickSignature);
2915 if (image->debug != MagickFalse)
2916 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
2917 assert(exception != (ExceptionInfo *) NULL);
2918 assert(exception->signature == MagickSignature);
2919 width=GetOptimalKernelWidth2D(radius,0.5);
2920 if ((image->columns < width) || (image->rows < width))
2921 ThrowImageException(OptionError,"ImageSmallerThanKernelRadius");
2922 median_image=CloneImage(image,image->columns,image->rows,MagickTrue,
2924 if (median_image == (Image *) NULL)
2925 return((Image *) NULL);
2926 if (SetImageStorageClass(median_image,DirectClass) == MagickFalse)
2928 InheritException(exception,&median_image->exception);
2929 median_image=DestroyImage(median_image);
2930 return((Image *) NULL);
2932 pixel_list=AcquireMedianPixelListThreadSet(width);
2933 if (pixel_list == (MedianPixelList **) NULL)
2935 median_image=DestroyImage(median_image);
2936 ThrowImageException(ResourceLimitError,"MemoryAllocationFailed");
2939 Median filter each image row.
2943 image_view=AcquireCacheView(image);
2944 median_view=AcquireCacheView(median_image);
2945 #if defined(MAGICKCORE_OPENMP_SUPPORT)
2946 #pragma omp parallel for schedule(dynamic,4) shared(progress,status)
2948 for (y=0; y < (ssize_t) median_image->rows; y++)
2953 register const IndexPacket
2956 register const PixelPacket
2959 register IndexPacket
2960 *restrict median_indexes;
2962 register PixelPacket
2968 if (status == MagickFalse)
2970 p=GetCacheViewVirtualPixels(image_view,-((ssize_t) width/2L),y-(ssize_t)
2971 (width/2L),image->columns+width,width,exception);
2972 q=QueueCacheViewAuthenticPixels(median_view,0,y,median_image->columns,1,
2974 if ((p == (const PixelPacket *) NULL) || (q == (PixelPacket *) NULL))
2979 indexes=GetCacheViewVirtualIndexQueue(image_view);
2980 median_indexes=GetCacheViewAuthenticIndexQueue(median_view);
2981 id=GetOpenMPThreadId();
2982 for (x=0; x < (ssize_t) median_image->columns; x++)
2987 register const IndexPacket
2990 register const PixelPacket
2999 ResetMedianPixelList(pixel_list[id]);
3000 for (v=0; v < (ssize_t) width; v++)
3002 for (u=0; u < (ssize_t) width; u++)
3003 InsertMedianPixelList(image,r+u,s+u,pixel_list[id]);
3004 r+=image->columns+width;
3005 s+=image->columns+width;
3007 pixel=GetMedianPixelList(pixel_list[id]);
3008 SetPixelPacket(median_image,&pixel,q,median_indexes+x);
3012 if (SyncCacheViewAuthenticPixels(median_view,exception) == MagickFalse)
3014 if (image->progress_monitor != (MagickProgressMonitor) NULL)
3019 #if defined(MAGICKCORE_OPENMP_SUPPORT)
3020 #pragma omp critical (MagickCore_MedianFilterImage)
3022 proceed=SetImageProgress(image,MedianFilterImageTag,progress++,
3024 if (proceed == MagickFalse)
3028 median_view=DestroyCacheView(median_view);
3029 image_view=DestroyCacheView(image_view);
3030 pixel_list=DestroyMedianPixelListThreadSet(pixel_list);
3031 return(median_image);
3035 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3039 % M o t i o n B l u r I m a g e %
3043 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3045 % MotionBlurImage() simulates motion blur. We convolve the image with a
3046 % Gaussian operator of the given radius and standard deviation (sigma).
3047 % For reasonable results, radius should be larger than sigma. Use a
3048 % radius of 0 and MotionBlurImage() selects a suitable radius for you.
3049 % Angle gives the angle of the blurring motion.
3051 % Andrew Protano contributed this effect.
3053 % The format of the MotionBlurImage method is:
3055 % Image *MotionBlurImage(const Image *image,const double radius,
3056 % const double sigma,const double angle,ExceptionInfo *exception)
3057 % Image *MotionBlurImageChannel(const Image *image,const ChannelType channel,
3058 % const double radius,const double sigma,const double angle,
3059 % ExceptionInfo *exception)
3061 % A description of each parameter follows:
3063 % o image: the image.
3065 % o channel: the channel type.
3067 % o radius: the radius of the Gaussian, in pixels, not counting the center
3068 % o radius: the radius of the Gaussian, in pixels, not counting
3071 % o sigma: the standard deviation of the Gaussian, in pixels.
3073 % o angle: Apply the effect along this angle.
3075 % o exception: return any errors or warnings in this structure.
3079 static double *GetMotionBlurKernel(const size_t width,const double sigma)
3089 Generate a 1-D convolution kernel.
3091 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"...");
3092 kernel=(double *) AcquireQuantumMemory((size_t) width,sizeof(*kernel));
3093 if (kernel == (double *) NULL)
3096 for (i=0; i < (ssize_t) width; i++)
3098 kernel[i]=exp((-((double) i*i)/(double) (2.0*MagickSigma*MagickSigma)))/
3099 (MagickSQ2PI*MagickSigma);
3100 normalize+=kernel[i];
3102 for (i=0; i < (ssize_t) width; i++)
3103 kernel[i]/=normalize;
3107 MagickExport Image *MotionBlurImage(const Image *image,const double radius,
3108 const double sigma,const double angle,ExceptionInfo *exception)
3113 motion_blur=MotionBlurImageChannel(image,DefaultChannels,radius,sigma,angle,
3115 return(motion_blur);
3118 MagickExport Image *MotionBlurImageChannel(const Image *image,
3119 const ChannelType channel,const double radius,const double sigma,
3120 const double angle,ExceptionInfo *exception)
3156 assert(image != (Image *) NULL);
3157 assert(image->signature == MagickSignature);
3158 if (image->debug != MagickFalse)
3159 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
3160 assert(exception != (ExceptionInfo *) NULL);
3161 width=GetOptimalKernelWidth1D(radius,sigma);
3162 kernel=GetMotionBlurKernel(width,sigma);
3163 if (kernel == (double *) NULL)
3164 ThrowImageException(ResourceLimitError,"MemoryAllocationFailed");
3165 offset=(OffsetInfo *) AcquireQuantumMemory(width,sizeof(*offset));
3166 if (offset == (OffsetInfo *) NULL)
3168 kernel=(double *) RelinquishMagickMemory(kernel);
3169 ThrowImageException(ResourceLimitError,"MemoryAllocationFailed");
3171 blur_image=CloneImage(image,0,0,MagickTrue,exception);
3172 if (blur_image == (Image *) NULL)
3174 kernel=(double *) RelinquishMagickMemory(kernel);
3175 offset=(OffsetInfo *) RelinquishMagickMemory(offset);
3176 return((Image *) NULL);
3178 if (SetImageStorageClass(blur_image,DirectClass) == MagickFalse)
3180 kernel=(double *) RelinquishMagickMemory(kernel);
3181 offset=(OffsetInfo *) RelinquishMagickMemory(offset);
3182 InheritException(exception,&blur_image->exception);
3183 blur_image=DestroyImage(blur_image);
3184 return((Image *) NULL);
3186 point.x=(double) width*sin(DegreesToRadians(angle));
3187 point.y=(double) width*cos(DegreesToRadians(angle));
3188 for (i=0; i < (ssize_t) width; i++)
3190 offset[i].x=(ssize_t) ceil((double) (i*point.y)/hypot(point.x,point.y)-0.5);
3191 offset[i].y=(ssize_t) ceil((double) (i*point.x)/hypot(point.x,point.y)-0.5);
3198 GetMagickPixelPacket(image,&bias);
3199 image_view=AcquireCacheView(image);
3200 blur_view=AcquireCacheView(blur_image);
3201 #if defined(MAGICKCORE_OPENMP_SUPPORT)
3202 #pragma omp parallel for schedule(dynamic,4) shared(progress,status)
3204 for (y=0; y < (ssize_t) image->rows; y++)
3206 register IndexPacket
3207 *restrict blur_indexes;
3209 register PixelPacket
3215 if (status == MagickFalse)
3217 q=GetCacheViewAuthenticPixels(blur_view,0,y,blur_image->columns,1,
3219 if (q == (PixelPacket *) NULL)
3224 blur_indexes=GetCacheViewAuthenticIndexQueue(blur_view);
3225 for (x=0; x < (ssize_t) image->columns; x++)
3233 register const IndexPacket
3244 if (((channel & OpacityChannel) == 0) || (image->matte == MagickFalse))
3246 for (i=0; i < (ssize_t) width; i++)
3248 (void) GetOneCacheViewVirtualPixel(image_view,x+offset[i].x,y+
3249 offset[i].y,&pixel,exception);
3250 qixel.red+=(*k)*pixel.red;
3251 qixel.green+=(*k)*pixel.green;
3252 qixel.blue+=(*k)*pixel.blue;
3253 qixel.opacity+=(*k)*pixel.opacity;
3254 if (image->colorspace == CMYKColorspace)
3256 indexes=GetCacheViewVirtualIndexQueue(image_view);
3257 qixel.index+=(*k)*(*indexes);
3261 if ((channel & RedChannel) != 0)
3262 q->red=ClampToQuantum(qixel.red);
3263 if ((channel & GreenChannel) != 0)
3264 q->green=ClampToQuantum(qixel.green);
3265 if ((channel & BlueChannel) != 0)
3266 q->blue=ClampToQuantum(qixel.blue);
3267 if ((channel & OpacityChannel) != 0)
3268 q->opacity=ClampToQuantum(qixel.opacity);
3269 if (((channel & IndexChannel) != 0) &&
3270 (image->colorspace == CMYKColorspace))
3271 blur_indexes[x]=(IndexPacket) ClampToQuantum(qixel.index);
3281 for (i=0; i < (ssize_t) width; i++)
3283 (void) GetOneCacheViewVirtualPixel(image_view,x+offset[i].x,y+
3284 offset[i].y,&pixel,exception);
3285 alpha=(MagickRealType) (QuantumScale*
3286 GetAlphaPixelComponent(&pixel));
3287 qixel.red+=(*k)*alpha*pixel.red;
3288 qixel.green+=(*k)*alpha*pixel.green;
3289 qixel.blue+=(*k)*alpha*pixel.blue;
3290 qixel.opacity+=(*k)*pixel.opacity;
3291 if (image->colorspace == CMYKColorspace)
3293 indexes=GetCacheViewVirtualIndexQueue(image_view);
3294 qixel.index+=(*k)*alpha*(*indexes);
3299 gamma=1.0/(fabs((double) gamma) <= MagickEpsilon ? 1.0 : gamma);
3300 if ((channel & RedChannel) != 0)
3301 q->red=ClampToQuantum(gamma*qixel.red);
3302 if ((channel & GreenChannel) != 0)
3303 q->green=ClampToQuantum(gamma*qixel.green);
3304 if ((channel & BlueChannel) != 0)
3305 q->blue=ClampToQuantum(gamma*qixel.blue);
3306 if ((channel & OpacityChannel) != 0)
3307 q->opacity=ClampToQuantum(qixel.opacity);
3308 if (((channel & IndexChannel) != 0) &&
3309 (image->colorspace == CMYKColorspace))
3310 blur_indexes[x]=(IndexPacket) ClampToQuantum(gamma*qixel.index);
3314 if (SyncCacheViewAuthenticPixels(blur_view,exception) == MagickFalse)
3316 if (image->progress_monitor != (MagickProgressMonitor) NULL)
3321 #if defined(MAGICKCORE_OPENMP_SUPPORT)
3322 #pragma omp critical (MagickCore_MotionBlurImageChannel)
3324 proceed=SetImageProgress(image,BlurImageTag,progress++,image->rows);
3325 if (proceed == MagickFalse)
3329 blur_view=DestroyCacheView(blur_view);
3330 image_view=DestroyCacheView(image_view);
3331 kernel=(double *) RelinquishMagickMemory(kernel);
3332 offset=(OffsetInfo *) RelinquishMagickMemory(offset);
3333 if (status == MagickFalse)
3334 blur_image=DestroyImage(blur_image);
3339 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3343 % P r e v i e w I m a g e %
3347 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3349 % PreviewImage() tiles 9 thumbnails of the specified image with an image
3350 % processing operation applied with varying parameters. This may be helpful
3351 % pin-pointing an appropriate parameter for a particular image processing
3354 % The format of the PreviewImages method is:
3356 % Image *PreviewImages(const Image *image,const PreviewType preview,
3357 % ExceptionInfo *exception)
3359 % A description of each parameter follows:
3361 % o image: the image.
3363 % o preview: the image processing operation.
3365 % o exception: return any errors or warnings in this structure.
3368 MagickExport Image *PreviewImage(const Image *image,const PreviewType preview,
3369 ExceptionInfo *exception)
3371 #define NumberTiles 9
3372 #define PreviewImageTag "Preview/Image"
3373 #define DefaultPreviewGeometry "204x204+10+10"
3376 factor[MaxTextExtent],
3377 label[MaxTextExtent];
3419 Open output image file.
3421 assert(image != (Image *) NULL);
3422 assert(image->signature == MagickSignature);
3423 if (image->debug != MagickFalse)
3424 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
3428 preview_info=AcquireImageInfo();
3429 SetGeometry(image,&geometry);
3430 (void) ParseMetaGeometry(DefaultPreviewGeometry,&geometry.x,&geometry.y,
3431 &geometry.width,&geometry.height);
3432 images=NewImageList();
3434 GetQuantizeInfo(&quantize_info);
3440 for (i=0; i < NumberTiles; i++)
3442 thumbnail=ThumbnailImage(image,geometry.width,geometry.height,exception);
3443 if (thumbnail == (Image *) NULL)
3445 (void) SetImageProgressMonitor(thumbnail,(MagickProgressMonitor) NULL,
3447 (void) SetImageProperty(thumbnail,"label",DefaultTileLabel);
3448 if (i == (NumberTiles/2))
3450 (void) QueryColorDatabase("#dfdfdf",&thumbnail->matte_color,exception);
3451 AppendImageToList(&images,thumbnail);
3459 preview_image=RotateImage(thumbnail,degrees,exception);
3460 (void) FormatMagickString(label,MaxTextExtent,"rotate %g",degrees);
3466 preview_image=ShearImage(thumbnail,degrees,degrees,exception);
3467 (void) FormatMagickString(label,MaxTextExtent,"shear %gx%g",
3468 degrees,2.0*degrees);
3473 x=(ssize_t) ((i+1)*thumbnail->columns)/NumberTiles;
3474 y=(ssize_t) ((i+1)*thumbnail->rows)/NumberTiles;
3475 preview_image=RollImage(thumbnail,x,y,exception);
3476 (void) FormatMagickString(label,MaxTextExtent,"roll %+.20gx%+.20g",
3477 (double) x,(double) y);
3482 preview_image=CloneImage(thumbnail,0,0,MagickTrue,exception);
3483 if (preview_image == (Image *) NULL)
3485 (void) FormatMagickString(factor,MaxTextExtent,"100,100,%g",
3487 (void) ModulateImage(preview_image,factor);
3488 (void) FormatMagickString(label,MaxTextExtent,"modulate %s",factor);
3491 case SaturationPreview:
3493 preview_image=CloneImage(thumbnail,0,0,MagickTrue,exception);
3494 if (preview_image == (Image *) NULL)
3496 (void) FormatMagickString(factor,MaxTextExtent,"100,%g",
3498 (void) ModulateImage(preview_image,factor);
3499 (void) FormatMagickString(label,MaxTextExtent,"modulate %s",factor);
3502 case BrightnessPreview:
3504 preview_image=CloneImage(thumbnail,0,0,MagickTrue,exception);
3505 if (preview_image == (Image *) NULL)
3507 (void) FormatMagickString(factor,MaxTextExtent,"%g",2.0*percentage);
3508 (void) ModulateImage(preview_image,factor);
3509 (void) FormatMagickString(label,MaxTextExtent,"modulate %s",factor);
3515 preview_image=CloneImage(thumbnail,0,0,MagickTrue,exception);
3516 if (preview_image == (Image *) NULL)
3519 (void) GammaImageChannel(preview_image,DefaultChannels,gamma);
3520 (void) FormatMagickString(label,MaxTextExtent,"gamma %g",gamma);
3525 preview_image=CloneImage(thumbnail,0,0,MagickTrue,exception);
3526 if (preview_image != (Image *) NULL)
3527 for (x=0; x < i; x++)
3528 (void) ContrastImage(preview_image,MagickTrue);
3529 (void) FormatMagickString(label,MaxTextExtent,"contrast (%.20g)",
3535 preview_image=CloneImage(thumbnail,0,0,MagickTrue,exception);
3536 if (preview_image == (Image *) NULL)
3538 for (x=0; x < i; x++)
3539 (void) ContrastImage(preview_image,MagickFalse);
3540 (void) FormatMagickString(label,MaxTextExtent,"+contrast (%.20g)",
3544 case GrayscalePreview:
3546 preview_image=CloneImage(thumbnail,0,0,MagickTrue,exception);
3547 if (preview_image == (Image *) NULL)
3550 quantize_info.number_colors=colors;
3551 quantize_info.colorspace=GRAYColorspace;
3552 (void) QuantizeImage(&quantize_info,preview_image);
3553 (void) FormatMagickString(label,MaxTextExtent,
3554 "-colorspace gray -colors %.20g",(double) colors);
3557 case QuantizePreview:
3559 preview_image=CloneImage(thumbnail,0,0,MagickTrue,exception);
3560 if (preview_image == (Image *) NULL)
3563 quantize_info.number_colors=colors;
3564 (void) QuantizeImage(&quantize_info,preview_image);
3565 (void) FormatMagickString(label,MaxTextExtent,"colors %.20g",(double)
3569 case DespecklePreview:
3571 for (x=0; x < (i-1); x++)
3573 preview_image=DespeckleImage(thumbnail,exception);
3574 if (preview_image == (Image *) NULL)
3576 thumbnail=DestroyImage(thumbnail);
3577 thumbnail=preview_image;
3579 preview_image=DespeckleImage(thumbnail,exception);
3580 if (preview_image == (Image *) NULL)
3582 (void) FormatMagickString(label,MaxTextExtent,"despeckle (%.20g)",
3586 case ReduceNoisePreview:
3588 preview_image=ReduceNoiseImage(thumbnail,radius,exception);
3589 (void) FormatMagickString(label,MaxTextExtent,"noise %g",radius);
3592 case AddNoisePreview:
3598 (void) CopyMagickString(factor,"uniform",MaxTextExtent);
3603 (void) CopyMagickString(factor,"gaussian",MaxTextExtent);
3608 (void) CopyMagickString(factor,"multiplicative",MaxTextExtent);
3613 (void) CopyMagickString(factor,"impulse",MaxTextExtent);
3618 (void) CopyMagickString(factor,"laplacian",MaxTextExtent);
3623 (void) CopyMagickString(factor,"Poisson",MaxTextExtent);
3628 (void) CopyMagickString(thumbnail->magick,"NULL",MaxTextExtent);
3632 preview_image=ReduceNoiseImage(thumbnail,(double) i,exception);
3633 (void) FormatMagickString(label,MaxTextExtent,"+noise %s",factor);
3636 case SharpenPreview:
3638 preview_image=SharpenImage(thumbnail,radius,sigma,exception);
3639 (void) FormatMagickString(label,MaxTextExtent,"sharpen %gx%g",
3645 preview_image=BlurImage(thumbnail,radius,sigma,exception);
3646 (void) FormatMagickString(label,MaxTextExtent,"blur %gx%g",radius,
3650 case ThresholdPreview:
3652 preview_image=CloneImage(thumbnail,0,0,MagickTrue,exception);
3653 if (preview_image == (Image *) NULL)
3655 (void) BilevelImage(thumbnail,
3656 (double) (percentage*((MagickRealType) QuantumRange+1.0))/100.0);
3657 (void) FormatMagickString(label,MaxTextExtent,"threshold %g",
3658 (double) (percentage*((MagickRealType) QuantumRange+1.0))/100.0);
3661 case EdgeDetectPreview:
3663 preview_image=EdgeImage(thumbnail,radius,exception);
3664 (void) FormatMagickString(label,MaxTextExtent,"edge %g",radius);
3669 preview_image=SpreadImage(thumbnail,radius,exception);
3670 (void) FormatMagickString(label,MaxTextExtent,"spread %g",
3674 case SolarizePreview:
3676 preview_image=CloneImage(thumbnail,0,0,MagickTrue,exception);
3677 if (preview_image == (Image *) NULL)
3679 (void) SolarizeImage(preview_image,(double) QuantumRange*
3681 (void) FormatMagickString(label,MaxTextExtent,"solarize %g",
3682 (QuantumRange*percentage)/100.0);
3688 preview_image=ShadeImage(thumbnail,MagickTrue,degrees,degrees,
3690 (void) FormatMagickString(label,MaxTextExtent,"shade %gx%g",
3696 preview_image=CloneImage(thumbnail,0,0,MagickTrue,exception);
3697 if (preview_image == (Image *) NULL)
3699 geometry.width=(size_t) (2*i+2);
3700 geometry.height=(size_t) (2*i+2);
3703 (void) RaiseImage(preview_image,&geometry,MagickTrue);
3704 (void) FormatMagickString(label,MaxTextExtent,
3705 "raise %.20gx%.20g%+.20g%+.20g",(double) geometry.width,(double)
3706 geometry.height,(double) geometry.x,(double) geometry.y);
3709 case SegmentPreview:
3711 preview_image=CloneImage(thumbnail,0,0,MagickTrue,exception);
3712 if (preview_image == (Image *) NULL)
3715 (void) SegmentImage(preview_image,RGBColorspace,MagickFalse,threshold,
3717 (void) FormatMagickString(label,MaxTextExtent,"segment %gx%g",
3718 threshold,threshold);
3723 preview_image=SwirlImage(thumbnail,degrees,exception);
3724 (void) FormatMagickString(label,MaxTextExtent,"swirl %g",degrees);
3728 case ImplodePreview:
3731 preview_image=ImplodeImage(thumbnail,degrees,exception);
3732 (void) FormatMagickString(label,MaxTextExtent,"implode %g",degrees);
3738 preview_image=WaveImage(thumbnail,0.5*degrees,2.0*degrees,exception);
3739 (void) FormatMagickString(label,MaxTextExtent,"wave %gx%g",
3740 0.5*degrees,2.0*degrees);
3743 case OilPaintPreview:
3745 preview_image=OilPaintImage(thumbnail,(double) radius,exception);
3746 (void) FormatMagickString(label,MaxTextExtent,"paint %g",radius);
3749 case CharcoalDrawingPreview:
3751 preview_image=CharcoalImage(thumbnail,(double) radius,(double) sigma,
3753 (void) FormatMagickString(label,MaxTextExtent,"charcoal %gx%g",
3760 filename[MaxTextExtent];
3768 preview_image=CloneImage(thumbnail,0,0,MagickTrue,exception);
3769 if (preview_image == (Image *) NULL)
3771 preview_info->quality=(size_t) percentage;
3772 (void) FormatMagickString(factor,MaxTextExtent,"%.20g",(double)
3773 preview_info->quality);
3774 file=AcquireUniqueFileResource(filename);
3777 (void) FormatMagickString(preview_image->filename,MaxTextExtent,
3778 "jpeg:%s",filename);
3779 status=WriteImage(preview_info,preview_image);
3780 if (status != MagickFalse)
3785 (void) CopyMagickString(preview_info->filename,
3786 preview_image->filename,MaxTextExtent);
3787 quality_image=ReadImage(preview_info,exception);
3788 if (quality_image != (Image *) NULL)
3790 preview_image=DestroyImage(preview_image);
3791 preview_image=quality_image;
3794 (void) RelinquishUniqueFileResource(preview_image->filename);
3795 if ((GetBlobSize(preview_image)/1024) >= 1024)
3796 (void) FormatMagickString(label,MaxTextExtent,"quality %s\n%gmb ",
3797 factor,(double) ((MagickOffsetType) GetBlobSize(preview_image))/
3800 if (GetBlobSize(preview_image) >= 1024)
3801 (void) FormatMagickString(label,MaxTextExtent,
3802 "quality %s\n%gkb ",factor,(double) ((MagickOffsetType)
3803 GetBlobSize(preview_image))/1024.0);
3805 (void) FormatMagickString(label,MaxTextExtent,"quality %s\n%.20gb ",
3806 factor,(double) GetBlobSize(thumbnail));
3810 thumbnail=DestroyImage(thumbnail);
3814 if (preview_image == (Image *) NULL)
3816 (void) DeleteImageProperty(preview_image,"label");
3817 (void) SetImageProperty(preview_image,"label",label);
3818 AppendImageToList(&images,preview_image);
3819 proceed=SetImageProgress(image,PreviewImageTag,(MagickOffsetType) i,
3821 if (proceed == MagickFalse)
3824 if (images == (Image *) NULL)
3826 preview_info=DestroyImageInfo(preview_info);
3827 return((Image *) NULL);
3832 montage_info=CloneMontageInfo(preview_info,(MontageInfo *) NULL);
3833 (void) CopyMagickString(montage_info->filename,image->filename,MaxTextExtent);
3834 montage_info->shadow=MagickTrue;
3835 (void) CloneString(&montage_info->tile,"3x3");
3836 (void) CloneString(&montage_info->geometry,DefaultPreviewGeometry);
3837 (void) CloneString(&montage_info->frame,DefaultTileFrame);
3838 montage_image=MontageImages(images,montage_info,exception);
3839 montage_info=DestroyMontageInfo(montage_info);
3840 images=DestroyImageList(images);
3841 if (montage_image == (Image *) NULL)
3842 ThrowImageException(ResourceLimitError,"MemoryAllocationFailed");
3843 if (montage_image->montage != (char *) NULL)
3846 Free image directory.
3848 montage_image->montage=(char *) RelinquishMagickMemory(
3849 montage_image->montage);
3850 if (image->directory != (char *) NULL)
3851 montage_image->directory=(char *) RelinquishMagickMemory(
3852 montage_image->directory);
3854 preview_info=DestroyImageInfo(preview_info);
3855 return(montage_image);
3859 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3863 % R a d i a l B l u r I m a g e %
3867 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3869 % RadialBlurImage() applies a radial blur to the image.
3871 % Andrew Protano contributed this effect.
3873 % The format of the RadialBlurImage method is:
3875 % Image *RadialBlurImage(const Image *image,const double angle,
3876 % ExceptionInfo *exception)
3877 % Image *RadialBlurImageChannel(const Image *image,const ChannelType channel,
3878 % const double angle,ExceptionInfo *exception)
3880 % A description of each parameter follows:
3882 % o image: the image.
3884 % o channel: the channel type.
3886 % o angle: the angle of the radial blur.
3888 % o exception: return any errors or warnings in this structure.
3892 MagickExport Image *RadialBlurImage(const Image *image,const double angle,
3893 ExceptionInfo *exception)
3898 blur_image=RadialBlurImageChannel(image,DefaultChannels,angle,exception);
3902 MagickExport Image *RadialBlurImageChannel(const Image *image,
3903 const ChannelType channel,const double angle,ExceptionInfo *exception)
3941 Allocate blur image.
3943 assert(image != (Image *) NULL);
3944 assert(image->signature == MagickSignature);
3945 if (image->debug != MagickFalse)
3946 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
3947 assert(exception != (ExceptionInfo *) NULL);
3948 assert(exception->signature == MagickSignature);
3949 blur_image=CloneImage(image,0,0,MagickTrue,exception);
3950 if (blur_image == (Image *) NULL)
3951 return((Image *) NULL);
3952 if (SetImageStorageClass(blur_image,DirectClass) == MagickFalse)
3954 InheritException(exception,&blur_image->exception);
3955 blur_image=DestroyImage(blur_image);
3956 return((Image *) NULL);
3958 blur_center.x=(double) image->columns/2.0;
3959 blur_center.y=(double) image->rows/2.0;
3960 blur_radius=hypot(blur_center.x,blur_center.y);
3961 n=(size_t) fabs(4.0*DegreesToRadians(angle)*sqrt((double) blur_radius)+2UL);
3962 theta=DegreesToRadians(angle)/(MagickRealType) (n-1);
3963 cos_theta=(MagickRealType *) AcquireQuantumMemory((size_t) n,
3964 sizeof(*cos_theta));
3965 sin_theta=(MagickRealType *) AcquireQuantumMemory((size_t) n,
3966 sizeof(*sin_theta));
3967 if ((cos_theta == (MagickRealType *) NULL) ||
3968 (sin_theta == (MagickRealType *) NULL))
3970 blur_image=DestroyImage(blur_image);
3971 ThrowImageException(ResourceLimitError,"MemoryAllocationFailed");
3973 offset=theta*(MagickRealType) (n-1)/2.0;
3974 for (i=0; i < (ssize_t) n; i++)
3976 cos_theta[i]=cos((double) (theta*i-offset));
3977 sin_theta[i]=sin((double) (theta*i-offset));
3984 GetMagickPixelPacket(image,&bias);
3985 image_view=AcquireCacheView(image);
3986 blur_view=AcquireCacheView(blur_image);
3987 #if defined(MAGICKCORE_OPENMP_SUPPORT)
3988 #pragma omp parallel for schedule(dynamic,4) shared(progress,status)
3990 for (y=0; y < (ssize_t) blur_image->rows; y++)
3992 register const IndexPacket
3995 register IndexPacket
3996 *restrict blur_indexes;
3998 register PixelPacket
4004 if (status == MagickFalse)
4006 q=GetCacheViewAuthenticPixels(blur_view,0,y,blur_image->columns,1,
4008 if (q == (PixelPacket *) NULL)
4013 blur_indexes=GetCacheViewAuthenticIndexQueue(blur_view);
4014 for (x=0; x < (ssize_t) blur_image->columns; x++)
4035 center.x=(double) x-blur_center.x;
4036 center.y=(double) y-blur_center.y;
4037 radius=hypot((double) center.x,center.y);
4042 step=(size_t) (blur_radius/radius);
4051 if (((channel & OpacityChannel) == 0) || (image->matte == MagickFalse))
4053 for (i=0; i < (ssize_t) n; i+=(ssize_t) step)
4055 (void) GetOneCacheViewVirtualPixel(image_view,(ssize_t)
4056 (blur_center.x+center.x*cos_theta[i]-center.y*sin_theta[i]+0.5),
4057 (ssize_t) (blur_center.y+center.x*sin_theta[i]+center.y*
4058 cos_theta[i]+0.5),&pixel,exception);
4059 qixel.red+=pixel.red;
4060 qixel.green+=pixel.green;
4061 qixel.blue+=pixel.blue;
4062 qixel.opacity+=pixel.opacity;
4063 if (image->colorspace == CMYKColorspace)
4065 indexes=GetCacheViewVirtualIndexQueue(image_view);
4066 qixel.index+=(*indexes);
4070 normalize=1.0/(fabs((double) normalize) <= MagickEpsilon ? 1.0 :
4072 if ((channel & RedChannel) != 0)
4073 q->red=ClampToQuantum(normalize*qixel.red);
4074 if ((channel & GreenChannel) != 0)
4075 q->green=ClampToQuantum(normalize*qixel.green);
4076 if ((channel & BlueChannel) != 0)
4077 q->blue=ClampToQuantum(normalize*qixel.blue);
4078 if ((channel & OpacityChannel) != 0)
4079 q->opacity=ClampToQuantum(normalize*qixel.opacity);
4080 if (((channel & IndexChannel) != 0) &&
4081 (image->colorspace == CMYKColorspace))
4082 blur_indexes[x]=(IndexPacket) ClampToQuantum(normalize*qixel.index);
4092 for (i=0; i < (ssize_t) n; i+=(ssize_t) step)
4094 (void) GetOneCacheViewVirtualPixel(image_view,(ssize_t)
4095 (blur_center.x+center.x*cos_theta[i]-center.y*sin_theta[i]+0.5),
4096 (ssize_t) (blur_center.y+center.x*sin_theta[i]+center.y*
4097 cos_theta[i]+0.5),&pixel,exception);
4098 alpha=(MagickRealType) (QuantumScale*
4099 GetAlphaPixelComponent(&pixel));
4100 qixel.red+=alpha*pixel.red;
4101 qixel.green+=alpha*pixel.green;
4102 qixel.blue+=alpha*pixel.blue;
4103 qixel.opacity+=pixel.opacity;
4104 if (image->colorspace == CMYKColorspace)
4106 indexes=GetCacheViewVirtualIndexQueue(image_view);
4107 qixel.index+=alpha*(*indexes);
4112 gamma=1.0/(fabs((double) gamma) <= MagickEpsilon ? 1.0 : gamma);
4113 normalize=1.0/(fabs((double) normalize) <= MagickEpsilon ? 1.0 :
4115 if ((channel & RedChannel) != 0)
4116 q->red=ClampToQuantum(gamma*qixel.red);
4117 if ((channel & GreenChannel) != 0)
4118 q->green=ClampToQuantum(gamma*qixel.green);
4119 if ((channel & BlueChannel) != 0)
4120 q->blue=ClampToQuantum(gamma*qixel.blue);
4121 if ((channel & OpacityChannel) != 0)
4122 q->opacity=ClampToQuantum(normalize*qixel.opacity);
4123 if (((channel & IndexChannel) != 0) &&
4124 (image->colorspace == CMYKColorspace))
4125 blur_indexes[x]=(IndexPacket) ClampToQuantum(gamma*qixel.index);
4129 if (SyncCacheViewAuthenticPixels(blur_view,exception) == MagickFalse)
4131 if (image->progress_monitor != (MagickProgressMonitor) NULL)
4136 #if defined(MAGICKCORE_OPENMP_SUPPORT)
4137 #pragma omp critical (MagickCore_RadialBlurImageChannel)
4139 proceed=SetImageProgress(image,BlurImageTag,progress++,image->rows);
4140 if (proceed == MagickFalse)
4144 blur_view=DestroyCacheView(blur_view);
4145 image_view=DestroyCacheView(image_view);
4146 cos_theta=(MagickRealType *) RelinquishMagickMemory(cos_theta);
4147 sin_theta=(MagickRealType *) RelinquishMagickMemory(sin_theta);
4148 if (status == MagickFalse)
4149 blur_image=DestroyImage(blur_image);
4154 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4158 % R e d u c e N o i s e I m a g e %
4162 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4164 % ReduceNoiseImage() smooths the contours of an image while still preserving
4165 % edge information. The algorithm works by replacing each pixel with its
4166 % neighbor closest in value. A neighbor is defined by radius. Use a radius
4167 % of 0 and ReduceNoise() selects a suitable radius for you.
4169 % The format of the ReduceNoiseImage method is:
4171 % Image *ReduceNoiseImage(const Image *image,const double radius,
4172 % ExceptionInfo *exception)
4174 % A description of each parameter follows:
4176 % o image: the image.
4178 % o radius: the radius of the pixel neighborhood.
4180 % o exception: return any errors or warnings in this structure.
4184 static MagickPixelPacket GetNonpeakMedianPixelList(MedianPixelList *pixel_list)
4189 register MedianSkipList
4206 Finds the median value for each of the color.
4208 center=pixel_list->center;
4209 for (channel=0; channel < 5; channel++)
4211 list=pixel_list->lists+channel;
4213 next=list->nodes[color].next[0];
4219 next=list->nodes[color].next[0];
4220 count+=list->nodes[color].count;
4222 while (count <= center);
4223 if ((previous == 65536UL) && (next != 65536UL))
4226 if ((previous != 65536UL) && (next == 65536UL))
4228 channels[channel]=(unsigned short) color;
4230 GetMagickPixelPacket((const Image *) NULL,&pixel);
4231 pixel.red=(MagickRealType) ScaleShortToQuantum(channels[0]);
4232 pixel.green=(MagickRealType) ScaleShortToQuantum(channels[1]);
4233 pixel.blue=(MagickRealType) ScaleShortToQuantum(channels[2]);
4234 pixel.opacity=(MagickRealType) ScaleShortToQuantum(channels[3]);
4235 pixel.index=(MagickRealType) ScaleShortToQuantum(channels[4]);
4239 MagickExport Image *ReduceNoiseImage(const Image *image,const double radius,
4240 ExceptionInfo *exception)
4242 #define ReduceNoiseImageTag "ReduceNoise/Image"
4258 **restrict pixel_list;
4267 Initialize noise image attributes.
4269 assert(image != (Image *) NULL);
4270 assert(image->signature == MagickSignature);
4271 if (image->debug != MagickFalse)
4272 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
4273 assert(exception != (ExceptionInfo *) NULL);
4274 assert(exception->signature == MagickSignature);
4275 width=GetOptimalKernelWidth2D(radius,0.5);
4276 if ((image->columns < width) || (image->rows < width))
4277 ThrowImageException(OptionError,"ImageSmallerThanKernelRadius");
4278 noise_image=CloneImage(image,image->columns,image->rows,MagickTrue,
4280 if (noise_image == (Image *) NULL)
4281 return((Image *) NULL);
4282 if (SetImageStorageClass(noise_image,DirectClass) == MagickFalse)
4284 InheritException(exception,&noise_image->exception);
4285 noise_image=DestroyImage(noise_image);
4286 return((Image *) NULL);
4288 pixel_list=AcquireMedianPixelListThreadSet(width);
4289 if (pixel_list == (MedianPixelList **) NULL)
4291 noise_image=DestroyImage(noise_image);
4292 ThrowImageException(ResourceLimitError,"MemoryAllocationFailed");
4299 image_view=AcquireCacheView(image);
4300 noise_view=AcquireCacheView(noise_image);
4301 #if defined(MAGICKCORE_OPENMP_SUPPORT)
4302 #pragma omp parallel for schedule(dynamic,4) shared(progress,status)
4304 for (y=0; y < (ssize_t) noise_image->rows; y++)
4309 register const IndexPacket
4312 register const PixelPacket
4315 register IndexPacket
4316 *restrict noise_indexes;
4318 register PixelPacket
4324 if (status == MagickFalse)
4326 p=GetCacheViewVirtualPixels(image_view,-((ssize_t) width/2L),y-(ssize_t)
4327 (width/2L),image->columns+width,width,exception);
4328 q=QueueCacheViewAuthenticPixels(noise_view,0,y,noise_image->columns,1,
4330 if ((p == (const PixelPacket *) NULL) || (q == (PixelPacket *) NULL))
4335 indexes=GetCacheViewVirtualIndexQueue(image_view);
4336 noise_indexes=GetCacheViewAuthenticIndexQueue(noise_view);
4337 id=GetOpenMPThreadId();
4338 for (x=0; x < (ssize_t) noise_image->columns; x++)
4343 register const PixelPacket
4346 register const IndexPacket
4355 ResetMedianPixelList(pixel_list[id]);
4356 for (v=0; v < (ssize_t) width; v++)
4358 for (u=0; u < (ssize_t) width; u++)
4359 InsertMedianPixelList(image,r+u,s+u,pixel_list[id]);
4360 r+=image->columns+width;
4361 s+=image->columns+width;
4363 pixel=GetNonpeakMedianPixelList(pixel_list[id]);
4364 SetPixelPacket(noise_image,&pixel,q,noise_indexes+x);
4368 if (SyncCacheViewAuthenticPixels(noise_view,exception) == MagickFalse)
4370 if (image->progress_monitor != (MagickProgressMonitor) NULL)
4375 #if defined(MAGICKCORE_OPENMP_SUPPORT)
4376 #pragma omp critical (MagickCore_ReduceNoiseImage)
4378 proceed=SetImageProgress(image,ReduceNoiseImageTag,progress++,
4380 if (proceed == MagickFalse)
4384 noise_view=DestroyCacheView(noise_view);
4385 image_view=DestroyCacheView(image_view);
4386 pixel_list=DestroyMedianPixelListThreadSet(pixel_list);
4387 return(noise_image);
4391 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4395 % S e l e c t i v e B l u r I m a g e %
4399 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4401 % SelectiveBlurImage() selectively blur pixels within a contrast threshold.
4402 % It is similar to the unsharpen mask that sharpens everything with contrast
4403 % above a certain threshold.
4405 % The format of the SelectiveBlurImage method is:
4407 % Image *SelectiveBlurImage(const Image *image,const double radius,
4408 % const double sigma,const double threshold,ExceptionInfo *exception)
4409 % Image *SelectiveBlurImageChannel(const Image *image,
4410 % const ChannelType channel,const double radius,const double sigma,
4411 % const double threshold,ExceptionInfo *exception)
4413 % A description of each parameter follows:
4415 % o image: the image.
4417 % o channel: the channel type.
4419 % o radius: the radius of the Gaussian, in pixels, not counting the center
4422 % o sigma: the standard deviation of the Gaussian, in pixels.
4424 % o threshold: only pixels within this contrast threshold are included
4425 % in the blur operation.
4427 % o exception: return any errors or warnings in this structure.
4431 static inline MagickBooleanType SelectiveContrast(const PixelPacket *p,
4432 const PixelPacket *q,const double threshold)
4434 if (fabs(PixelIntensity(p)-PixelIntensity(q)) < threshold)
4436 return(MagickFalse);
4439 MagickExport Image *SelectiveBlurImage(const Image *image,const double radius,
4440 const double sigma,const double threshold,ExceptionInfo *exception)
4445 blur_image=SelectiveBlurImageChannel(image,DefaultChannels,radius,sigma,
4446 threshold,exception);
4450 MagickExport Image *SelectiveBlurImageChannel(const Image *image,
4451 const ChannelType channel,const double radius,const double sigma,
4452 const double threshold,ExceptionInfo *exception)
4454 #define SelectiveBlurImageTag "SelectiveBlur/Image"
4488 Initialize blur image attributes.
4490 assert(image != (Image *) NULL);
4491 assert(image->signature == MagickSignature);
4492 if (image->debug != MagickFalse)
4493 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
4494 assert(exception != (ExceptionInfo *) NULL);
4495 assert(exception->signature == MagickSignature);
4496 width=GetOptimalKernelWidth1D(radius,sigma);
4497 kernel=(double *) AcquireQuantumMemory((size_t) width,width*sizeof(*kernel));
4498 if (kernel == (double *) NULL)
4499 ThrowImageException(ResourceLimitError,"MemoryAllocationFailed");
4500 j=(ssize_t) width/2;
4502 for (v=(-j); v <= j; v++)
4504 for (u=(-j); u <= j; u++)
4505 kernel[i++]=exp(-((double) u*u+v*v)/(2.0*MagickSigma*MagickSigma))/
4506 (2.0*MagickPI*MagickSigma*MagickSigma);
4508 if (image->debug != MagickFalse)
4511 format[MaxTextExtent],
4514 register const double
4521 (void) LogMagickEvent(TransformEvent,GetMagickModule(),
4522 " SelectiveBlurImage with %.20gx%.20g kernel:",(double) width,(double)
4524 message=AcquireString("");
4526 for (v=0; v < (ssize_t) width; v++)
4529 (void) FormatMagickString(format,MaxTextExtent,"%.20g: ",(double) v);
4530 (void) ConcatenateString(&message,format);
4531 for (u=0; u < (ssize_t) width; u++)
4533 (void) FormatMagickString(format,MaxTextExtent,"%+f ",*k++);
4534 (void) ConcatenateString(&message,format);
4536 (void) LogMagickEvent(TransformEvent,GetMagickModule(),"%s",message);
4538 message=DestroyString(message);
4540 blur_image=CloneImage(image,0,0,MagickTrue,exception);
4541 if (blur_image == (Image *) NULL)
4542 return((Image *) NULL);
4543 if (SetImageStorageClass(blur_image,DirectClass) == MagickFalse)
4545 InheritException(exception,&blur_image->exception);
4546 blur_image=DestroyImage(blur_image);
4547 return((Image *) NULL);
4550 Threshold blur image.
4554 GetMagickPixelPacket(image,&bias);
4555 SetMagickPixelPacketBias(image,&bias);
4556 image_view=AcquireCacheView(image);
4557 blur_view=AcquireCacheView(blur_image);
4558 #if defined(MAGICKCORE_OPENMP_SUPPORT)
4559 #pragma omp parallel for schedule(dynamic,4) shared(progress,status)
4561 for (y=0; y < (ssize_t) image->rows; y++)
4569 register const IndexPacket
4572 register const PixelPacket
4575 register IndexPacket
4576 *restrict blur_indexes;
4578 register PixelPacket
4584 if (status == MagickFalse)
4586 p=GetCacheViewVirtualPixels(image_view,-((ssize_t) width/2L),y-(ssize_t)
4587 (width/2L),image->columns+width,width,exception);
4588 q=GetCacheViewAuthenticPixels(blur_view,0,y,blur_image->columns,1,
4590 if ((p == (const PixelPacket *) NULL) || (q == (PixelPacket *) NULL))
4595 indexes=GetCacheViewVirtualIndexQueue(image_view);
4596 blur_indexes=GetCacheViewAuthenticIndexQueue(blur_view);
4597 for (x=0; x < (ssize_t) image->columns; x++)
4602 register const double
4616 if (((channel & OpacityChannel) == 0) || (image->matte == MagickFalse))
4618 for (v=0; v < (ssize_t) width; v++)
4620 for (u=0; u < (ssize_t) width; u++)
4622 if (SelectiveContrast(p+u+j,q,threshold) != MagickFalse)
4624 pixel.red+=(*k)*(p+u+j)->red;
4625 pixel.green+=(*k)*(p+u+j)->green;
4626 pixel.blue+=(*k)*(p+u+j)->blue;
4631 j+=(ssize_t) (image->columns+width);
4635 gamma=1.0/(fabs((double) gamma) <= MagickEpsilon ? 1.0 : gamma);
4636 if ((channel & RedChannel) != 0)
4637 q->red=ClampToQuantum(gamma*GetRedPixelComponent(&pixel));
4638 if ((channel & GreenChannel) != 0)
4639 q->green=ClampToQuantum(gamma*GetGreenPixelComponent(&pixel));
4640 if ((channel & BlueChannel) != 0)
4641 q->blue=ClampToQuantum(gamma*GetBluePixelComponent(&pixel));
4643 if ((channel & OpacityChannel) != 0)
4647 for (v=0; v < (ssize_t) width; v++)
4649 for (u=0; u < (ssize_t) width; u++)
4651 if (SelectiveContrast(p+u+j,q,threshold) != MagickFalse)
4653 pixel.opacity+=(*k)*(p+u+j)->opacity;
4658 j+=(ssize_t) (image->columns+width);
4662 gamma=1.0/(fabs((double) gamma) <= MagickEpsilon ? 1.0 :
4664 SetOpacityPixelComponent(q,ClampToQuantum(gamma*
4665 GetOpacityPixelComponent(&pixel)));
4668 if (((channel & IndexChannel) != 0) &&
4669 (image->colorspace == CMYKColorspace))
4673 for (v=0; v < (ssize_t) width; v++)
4675 for (u=0; u < (ssize_t) width; u++)
4677 if (SelectiveContrast(p+u+j,q,threshold) != MagickFalse)
4679 pixel.index+=(*k)*indexes[x+u+j];
4684 j+=(ssize_t) (image->columns+width);
4688 gamma=1.0/(fabs((double) gamma) <= MagickEpsilon ? 1.0 :
4690 blur_indexes[x]=ClampToQuantum(gamma*
4691 GetIndexPixelComponent(&pixel));
4700 for (v=0; v < (ssize_t) width; v++)
4702 for (u=0; u < (ssize_t) width; u++)
4704 if (SelectiveContrast(p+u+j,q,threshold) != MagickFalse)
4706 alpha=(MagickRealType) (QuantumScale*
4707 GetAlphaPixelComponent(p+u+j));
4708 pixel.red+=(*k)*alpha*(p+u+j)->red;
4709 pixel.green+=(*k)*alpha*(p+u+j)->green;
4710 pixel.blue+=(*k)*alpha*(p+u+j)->blue;
4711 pixel.opacity+=(*k)*(p+u+j)->opacity;
4716 j+=(ssize_t) (image->columns+width);
4720 gamma=1.0/(fabs((double) gamma) <= MagickEpsilon ? 1.0 : gamma);
4721 if ((channel & RedChannel) != 0)
4722 q->red=ClampToQuantum(gamma*GetRedPixelComponent(&pixel));
4723 if ((channel & GreenChannel) != 0)
4724 q->green=ClampToQuantum(gamma*GetGreenPixelComponent(&pixel));
4725 if ((channel & BlueChannel) != 0)
4726 q->blue=ClampToQuantum(gamma*GetBluePixelComponent(&pixel));
4728 if ((channel & OpacityChannel) != 0)
4732 for (v=0; v < (ssize_t) width; v++)
4734 for (u=0; u < (ssize_t) width; u++)
4736 if (SelectiveContrast(p+u+j,q,threshold) != MagickFalse)
4738 pixel.opacity+=(*k)*(p+u+j)->opacity;
4743 j+=(ssize_t) (image->columns+width);
4747 gamma=1.0/(fabs((double) gamma) <= MagickEpsilon ? 1.0 :
4749 SetOpacityPixelComponent(q,
4750 ClampOpacityPixelComponent(&pixel));
4753 if (((channel & IndexChannel) != 0) &&
4754 (image->colorspace == CMYKColorspace))
4758 for (v=0; v < (ssize_t) width; v++)
4760 for (u=0; u < (ssize_t) width; u++)
4762 if (SelectiveContrast(p+u+j,q,threshold) != MagickFalse)
4764 alpha=(MagickRealType) (QuantumScale*
4765 GetAlphaPixelComponent(p+u+j));
4766 pixel.index+=(*k)*alpha*indexes[x+u+j];
4771 j+=(ssize_t) (image->columns+width);
4775 gamma=1.0/(fabs((double) gamma) <= MagickEpsilon ? 1.0 :
4777 blur_indexes[x]=ClampToQuantum(gamma*
4778 GetIndexPixelComponent(&pixel));
4785 sync=SyncCacheViewAuthenticPixels(blur_view,exception);
4786 if (sync == MagickFalse)
4788 if (image->progress_monitor != (MagickProgressMonitor) NULL)
4793 #if defined(MAGICKCORE_OPENMP_SUPPORT)
4794 #pragma omp critical (MagickCore_SelectiveBlurImageChannel)
4796 proceed=SetImageProgress(image,SelectiveBlurImageTag,progress++,
4798 if (proceed == MagickFalse)
4802 blur_image->type=image->type;
4803 blur_view=DestroyCacheView(blur_view);
4804 image_view=DestroyCacheView(image_view);
4805 kernel=(double *) RelinquishMagickMemory(kernel);
4806 if (status == MagickFalse)
4807 blur_image=DestroyImage(blur_image);
4812 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4816 % S h a d e I m a g e %
4820 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4822 % ShadeImage() shines a distant light on an image to create a
4823 % three-dimensional effect. You control the positioning of the light with
4824 % azimuth and elevation; azimuth is measured in degrees off the x axis
4825 % and elevation is measured in pixels above the Z axis.
4827 % The format of the ShadeImage method is:
4829 % Image *ShadeImage(const Image *image,const MagickBooleanType gray,
4830 % const double azimuth,const double elevation,ExceptionInfo *exception)
4832 % A description of each parameter follows:
4834 % o image: the image.
4836 % o gray: A value other than zero shades the intensity of each pixel.
4838 % o azimuth, elevation: Define the light source direction.
4840 % o exception: return any errors or warnings in this structure.
4843 MagickExport Image *ShadeImage(const Image *image,const MagickBooleanType gray,
4844 const double azimuth,const double elevation,ExceptionInfo *exception)
4846 #define ShadeImageTag "Shade/Image"
4868 Initialize shaded image attributes.
4870 assert(image != (const Image *) NULL);
4871 assert(image->signature == MagickSignature);
4872 if (image->debug != MagickFalse)
4873 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
4874 assert(exception != (ExceptionInfo *) NULL);
4875 assert(exception->signature == MagickSignature);
4876 shade_image=CloneImage(image,image->columns,image->rows,MagickTrue,exception);
4877 if (shade_image == (Image *) NULL)
4878 return((Image *) NULL);
4879 if (SetImageStorageClass(shade_image,DirectClass) == MagickFalse)
4881 InheritException(exception,&shade_image->exception);
4882 shade_image=DestroyImage(shade_image);
4883 return((Image *) NULL);
4886 Compute the light vector.
4888 light.x=(double) QuantumRange*cos(DegreesToRadians(azimuth))*
4889 cos(DegreesToRadians(elevation));
4890 light.y=(double) QuantumRange*sin(DegreesToRadians(azimuth))*
4891 cos(DegreesToRadians(elevation));
4892 light.z=(double) QuantumRange*sin(DegreesToRadians(elevation));
4898 image_view=AcquireCacheView(image);
4899 shade_view=AcquireCacheView(shade_image);
4900 #if defined(MAGICKCORE_OPENMP_SUPPORT)
4901 #pragma omp parallel for schedule(dynamic,4) shared(progress,status)
4903 for (y=0; y < (ssize_t) image->rows; y++)
4913 register const PixelPacket
4919 register PixelPacket
4925 if (status == MagickFalse)
4927 p=GetCacheViewVirtualPixels(image_view,-1,y-1,image->columns+2,3,exception);
4928 q=QueueCacheViewAuthenticPixels(shade_view,0,y,shade_image->columns,1,
4930 if ((p == (PixelPacket *) NULL) || (q == (PixelPacket *) NULL))
4936 Shade this row of pixels.
4938 normal.z=2.0*(double) QuantumRange; /* constant Z of surface normal */
4940 s1=s0+image->columns+2;
4941 s2=s1+image->columns+2;
4942 for (x=0; x < (ssize_t) image->columns; x++)
4945 Determine the surface normal and compute shading.
4947 normal.x=(double) (PixelIntensity(s0-1)+PixelIntensity(s1-1)+
4948 PixelIntensity(s2-1)-PixelIntensity(s0+1)-PixelIntensity(s1+1)-
4949 PixelIntensity(s2+1));
4950 normal.y=(double) (PixelIntensity(s2-1)+PixelIntensity(s2)+
4951 PixelIntensity(s2+1)-PixelIntensity(s0-1)-PixelIntensity(s0)-
4952 PixelIntensity(s0+1));
4953 if ((normal.x == 0.0) && (normal.y == 0.0))
4958 distance=normal.x*light.x+normal.y*light.y+normal.z*light.z;
4959 if (distance > MagickEpsilon)
4962 normal.x*normal.x+normal.y*normal.y+normal.z*normal.z;
4963 if (normal_distance > (MagickEpsilon*MagickEpsilon))
4964 shade=distance/sqrt((double) normal_distance);
4967 if (gray != MagickFalse)
4969 q->red=(Quantum) shade;
4970 q->green=(Quantum) shade;
4971 q->blue=(Quantum) shade;
4975 q->red=ClampToQuantum(QuantumScale*shade*s1->red);
4976 q->green=ClampToQuantum(QuantumScale*shade*s1->green);
4977 q->blue=ClampToQuantum(QuantumScale*shade*s1->blue);
4979 q->opacity=s1->opacity;
4985 if (SyncCacheViewAuthenticPixels(shade_view,exception) == MagickFalse)
4987 if (image->progress_monitor != (MagickProgressMonitor) NULL)
4992 #if defined(MAGICKCORE_OPENMP_SUPPORT)
4993 #pragma omp critical (MagickCore_ShadeImage)
4995 proceed=SetImageProgress(image,ShadeImageTag,progress++,image->rows);
4996 if (proceed == MagickFalse)
5000 shade_view=DestroyCacheView(shade_view);
5001 image_view=DestroyCacheView(image_view);
5002 if (status == MagickFalse)
5003 shade_image=DestroyImage(shade_image);
5004 return(shade_image);
5008 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
5012 % S h a r p e n I m a g e %
5016 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
5018 % SharpenImage() sharpens the image. We convolve the image with a Gaussian
5019 % operator of the given radius and standard deviation (sigma). For
5020 % reasonable results, radius should be larger than sigma. Use a radius of 0
5021 % and SharpenImage() selects a suitable radius for you.
5023 % Using a separable kernel would be faster, but the negative weights cancel
5024 % out on the corners of the kernel producing often undesirable ringing in the
5025 % filtered result; this can be avoided by using a 2D gaussian shaped image
5026 % sharpening kernel instead.
5028 % The format of the SharpenImage method is:
5030 % Image *SharpenImage(const Image *image,const double radius,
5031 % const double sigma,ExceptionInfo *exception)
5032 % Image *SharpenImageChannel(const Image *image,const ChannelType channel,
5033 % const double radius,const double sigma,ExceptionInfo *exception)
5035 % A description of each parameter follows:
5037 % o image: the image.
5039 % o channel: the channel type.
5041 % o radius: the radius of the Gaussian, in pixels, not counting the center
5044 % o sigma: the standard deviation of the Laplacian, in pixels.
5046 % o exception: return any errors or warnings in this structure.
5050 MagickExport Image *SharpenImage(const Image *image,const double radius,
5051 const double sigma,ExceptionInfo *exception)
5056 sharp_image=SharpenImageChannel(image,DefaultChannels,radius,sigma,exception);
5057 return(sharp_image);
5060 MagickExport Image *SharpenImageChannel(const Image *image,
5061 const ChannelType channel,const double radius,const double sigma,
5062 ExceptionInfo *exception)
5082 assert(image != (const Image *) NULL);
5083 assert(image->signature == MagickSignature);
5084 if (image->debug != MagickFalse)
5085 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
5086 assert(exception != (ExceptionInfo *) NULL);
5087 assert(exception->signature == MagickSignature);
5088 width=GetOptimalKernelWidth2D(radius,sigma);
5089 kernel=(double *) AcquireQuantumMemory((size_t) width*width,sizeof(*kernel));
5090 if (kernel == (double *) NULL)
5091 ThrowImageException(ResourceLimitError,"MemoryAllocationFailed");
5093 j=(ssize_t) width/2;
5095 for (v=(-j); v <= j; v++)
5097 for (u=(-j); u <= j; u++)
5099 kernel[i]=(-exp(-((double) u*u+v*v)/(2.0*MagickSigma*MagickSigma))/
5100 (2.0*MagickPI*MagickSigma*MagickSigma));
5101 normalize+=kernel[i];
5105 kernel[i/2]=(double) ((-2.0)*normalize);
5106 sharp_image=ConvolveImageChannel(image,channel,width,kernel,exception);
5107 kernel=(double *) RelinquishMagickMemory(kernel);
5108 return(sharp_image);
5112 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
5116 % S p r e a d I m a g e %
5120 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
5122 % SpreadImage() is a special effects method that randomly displaces each
5123 % pixel in a block defined by the radius parameter.
5125 % The format of the SpreadImage method is:
5127 % Image *SpreadImage(const Image *image,const double radius,
5128 % ExceptionInfo *exception)
5130 % A description of each parameter follows:
5132 % o image: the image.
5134 % o radius: Choose a random pixel in a neighborhood of this extent.
5136 % o exception: return any errors or warnings in this structure.
5139 MagickExport Image *SpreadImage(const Image *image,const double radius,
5140 ExceptionInfo *exception)
5142 #define SpreadImageTag "Spread/Image"
5160 **restrict random_info;
5163 **restrict resample_filter;
5172 Initialize spread image attributes.
5174 assert(image != (Image *) NULL);
5175 assert(image->signature == MagickSignature);
5176 if (image->debug != MagickFalse)
5177 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
5178 assert(exception != (ExceptionInfo *) NULL);
5179 assert(exception->signature == MagickSignature);
5180 spread_image=CloneImage(image,image->columns,image->rows,MagickTrue,
5182 if (spread_image == (Image *) NULL)
5183 return((Image *) NULL);
5184 if (SetImageStorageClass(spread_image,DirectClass) == MagickFalse)
5186 InheritException(exception,&spread_image->exception);
5187 spread_image=DestroyImage(spread_image);
5188 return((Image *) NULL);
5195 GetMagickPixelPacket(spread_image,&bias);
5196 width=GetOptimalKernelWidth1D(radius,0.5);
5197 resample_filter=AcquireResampleFilterThreadSet(image,
5198 UndefinedVirtualPixelMethod,MagickTrue,exception);
5199 random_info=AcquireRandomInfoThreadSet();
5200 image_view=AcquireCacheView(spread_image);
5201 #if defined(MAGICKCORE_OPENMP_SUPPORT)
5202 #pragma omp parallel for schedule(dynamic,4) shared(progress,status)
5204 for (y=0; y < (ssize_t) spread_image->rows; y++)
5212 register IndexPacket
5215 register PixelPacket
5221 if (status == MagickFalse)
5223 q=QueueCacheViewAuthenticPixels(image_view,0,y,spread_image->columns,1,
5225 if (q == (PixelPacket *) NULL)
5230 indexes=GetCacheViewAuthenticIndexQueue(image_view);
5232 id=GetOpenMPThreadId();
5233 for (x=0; x < (ssize_t) spread_image->columns; x++)
5235 (void) ResamplePixelColor(resample_filter[id],(double) x+width*
5236 (GetPseudoRandomValue(random_info[id])-0.5),(double) y+width*
5237 (GetPseudoRandomValue(random_info[id])-0.5),&pixel);
5238 SetPixelPacket(spread_image,&pixel,q,indexes+x);
5241 if (SyncCacheViewAuthenticPixels(image_view,exception) == MagickFalse)
5243 if (image->progress_monitor != (MagickProgressMonitor) NULL)
5248 #if defined(MAGICKCORE_OPENMP_SUPPORT)
5249 #pragma omp critical (MagickCore_SpreadImage)
5251 proceed=SetImageProgress(image,SpreadImageTag,progress++,image->rows);
5252 if (proceed == MagickFalse)
5256 image_view=DestroyCacheView(image_view);
5257 random_info=DestroyRandomInfoThreadSet(random_info);
5258 resample_filter=DestroyResampleFilterThreadSet(resample_filter);
5259 return(spread_image);
5263 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
5267 % U n s h a r p M a s k I m a g e %
5271 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
5273 % UnsharpMaskImage() sharpens one or more image channels. We convolve the
5274 % image with a Gaussian operator of the given radius and standard deviation
5275 % (sigma). For reasonable results, radius should be larger than sigma. Use a
5276 % radius of 0 and UnsharpMaskImage() selects a suitable radius for you.
5278 % The format of the UnsharpMaskImage method is:
5280 % Image *UnsharpMaskImage(const Image *image,const double radius,
5281 % const double sigma,const double amount,const double threshold,
5282 % ExceptionInfo *exception)
5283 % Image *UnsharpMaskImageChannel(const Image *image,
5284 % const ChannelType channel,const double radius,const double sigma,
5285 % const double amount,const double threshold,ExceptionInfo *exception)
5287 % A description of each parameter follows:
5289 % o image: the image.
5291 % o channel: the channel type.
5293 % o radius: the radius of the Gaussian, in pixels, not counting the center
5296 % o sigma: the standard deviation of the Gaussian, in pixels.
5298 % o amount: the percentage of the difference between the original and the
5299 % blur image that is added back into the original.
5301 % o threshold: the threshold in pixels needed to apply the diffence amount.
5303 % o exception: return any errors or warnings in this structure.
5307 MagickExport Image *UnsharpMaskImage(const Image *image,const double radius,
5308 const double sigma,const double amount,const double threshold,
5309 ExceptionInfo *exception)
5314 sharp_image=UnsharpMaskImageChannel(image,DefaultChannels,radius,sigma,amount,
5315 threshold,exception);
5316 return(sharp_image);
5319 MagickExport Image *UnsharpMaskImageChannel(const Image *image,
5320 const ChannelType channel,const double radius,const double sigma,
5321 const double amount,const double threshold,ExceptionInfo *exception)
5323 #define SharpenImageTag "Sharpen/Image"
5347 assert(image != (const Image *) NULL);
5348 assert(image->signature == MagickSignature);
5349 if (image->debug != MagickFalse)
5350 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
5351 assert(exception != (ExceptionInfo *) NULL);
5352 unsharp_image=BlurImageChannel(image,channel,radius,sigma,exception);
5353 if (unsharp_image == (Image *) NULL)
5354 return((Image *) NULL);
5355 quantum_threshold=(MagickRealType) QuantumRange*threshold;
5361 GetMagickPixelPacket(image,&bias);
5362 image_view=AcquireCacheView(image);
5363 unsharp_view=AcquireCacheView(unsharp_image);
5364 #if defined(MAGICKCORE_OPENMP_SUPPORT)
5365 #pragma omp parallel for schedule(dynamic,4) shared(progress,status)
5367 for (y=0; y < (ssize_t) image->rows; y++)
5372 register const IndexPacket
5375 register const PixelPacket
5378 register IndexPacket
5379 *restrict unsharp_indexes;
5381 register PixelPacket
5387 if (status == MagickFalse)
5389 p=GetCacheViewVirtualPixels(image_view,0,y,image->columns,1,exception);
5390 q=GetCacheViewAuthenticPixels(unsharp_view,0,y,unsharp_image->columns,1,
5392 if ((p == (const PixelPacket *) NULL) || (q == (PixelPacket *) NULL))
5397 indexes=GetCacheViewVirtualIndexQueue(image_view);
5398 unsharp_indexes=GetCacheViewAuthenticIndexQueue(unsharp_view);
5400 for (x=0; x < (ssize_t) image->columns; x++)
5402 if ((channel & RedChannel) != 0)
5404 pixel.red=p->red-(MagickRealType) q->red;
5405 if (fabs(2.0*pixel.red) < quantum_threshold)
5406 pixel.red=(MagickRealType) GetRedPixelComponent(p);
5408 pixel.red=(MagickRealType) p->red+(pixel.red*amount);
5409 SetRedPixelComponent(q,ClampRedPixelComponent(&pixel));
5411 if ((channel & GreenChannel) != 0)
5413 pixel.green=p->green-(MagickRealType) q->green;
5414 if (fabs(2.0*pixel.green) < quantum_threshold)
5415 pixel.green=(MagickRealType) GetGreenPixelComponent(p);
5417 pixel.green=(MagickRealType) p->green+(pixel.green*amount);
5418 SetGreenPixelComponent(q,ClampGreenPixelComponent(&pixel));
5420 if ((channel & BlueChannel) != 0)
5422 pixel.blue=p->blue-(MagickRealType) q->blue;
5423 if (fabs(2.0*pixel.blue) < quantum_threshold)
5424 pixel.blue=(MagickRealType) GetBluePixelComponent(p);
5426 pixel.blue=(MagickRealType) p->blue+(pixel.blue*amount);
5427 SetBluePixelComponent(q,ClampBluePixelComponent(&pixel));
5429 if ((channel & OpacityChannel) != 0)
5431 pixel.opacity=p->opacity-(MagickRealType) q->opacity;
5432 if (fabs(2.0*pixel.opacity) < quantum_threshold)
5433 pixel.opacity=(MagickRealType) GetOpacityPixelComponent(p);
5435 pixel.opacity=p->opacity+(pixel.opacity*amount);
5436 SetOpacityPixelComponent(q,ClampOpacityPixelComponent(&pixel));
5438 if (((channel & IndexChannel) != 0) &&
5439 (image->colorspace == CMYKColorspace))
5441 pixel.index=unsharp_indexes[x]-(MagickRealType) indexes[x];
5442 if (fabs(2.0*pixel.index) < quantum_threshold)
5443 pixel.index=(MagickRealType) unsharp_indexes[x];
5445 pixel.index=(MagickRealType) unsharp_indexes[x]+(pixel.index*
5447 unsharp_indexes[x]=ClampToQuantum(pixel.index);
5452 if (SyncCacheViewAuthenticPixels(unsharp_view,exception) == MagickFalse)
5454 if (image->progress_monitor != (MagickProgressMonitor) NULL)
5459 #if defined(MAGICKCORE_OPENMP_SUPPORT)
5460 #pragma omp critical (MagickCore_UnsharpMaskImageChannel)
5462 proceed=SetImageProgress(image,SharpenImageTag,progress++,image->rows);
5463 if (proceed == MagickFalse)
5467 unsharp_image->type=image->type;
5468 unsharp_view=DestroyCacheView(unsharp_view);
5469 image_view=DestroyCacheView(image_view);
5470 if (status == MagickFalse)
5471 unsharp_image=DestroyImage(unsharp_image);
5472 return(unsharp_image);