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]=(double) (exp(-((double) u*u+v*v)/(2.0*MagickSigma*
241 MagickSigma))/(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]=(double) (-exp(-((double) u*u+v*v)/(2.0*MagickSigma*
558 MagickSigma))/(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]=(double) (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 **) RelinquishMagickMemory(pixels);
1670 static Quantum **AcquirePixelThreadSet(const size_t count)
1681 number_threads=GetOpenMPMaximumThreads();
1682 pixels=(Quantum **) AcquireQuantumMemory(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,1) shared(status)
1866 for (channel=0; channel <= 3; channel++)
1869 id = GetOpenMPThreadId();
1883 if (status == MagickFalse)
1886 (void) ResetMagickMemory(pixel,0,length*sizeof(*pixel));
1888 j=(ssize_t) image->columns+2;
1889 for (y=0; y < (ssize_t) image->rows; y++)
1891 register const PixelPacket
1894 p=GetCacheViewVirtualPixels(image_view,0,y,image->columns,1,exception);
1895 if (p == (const PixelPacket *) NULL)
1898 for (x=0; x < (ssize_t) image->columns; x++)
1902 case 0: pixel[j]=GetRedPixelComponent(p); break;
1903 case 1: pixel[j]=GetGreenPixelComponent(p); break;
1904 case 2: pixel[j]=GetBluePixelComponent(p); break;
1905 case 3: pixel[j]=GetOpacityPixelComponent(p); break;
1913 (void) ResetMagickMemory(buffer,0,length*sizeof(*buffer));
1914 for (i=0; i < 4; i++)
1916 Hull(X[i],Y[i],image->columns,image->rows,pixel,buffer,1);
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);
1921 j=(ssize_t) image->columns+2;
1922 for (y=0; y < (ssize_t) image->rows; y++)
1927 register PixelPacket
1930 q=GetCacheViewAuthenticPixels(despeckle_view,0,y,despeckle_image->columns,
1932 if (q == (PixelPacket *) NULL)
1935 for (x=0; x < (ssize_t) image->columns; x++)
1939 case 0: q->red=pixel[j]; break;
1940 case 1: q->green=pixel[j]; break;
1941 case 2: q->blue=pixel[j]; break;
1942 case 3: q->opacity=pixel[j]; break;
1948 sync=SyncCacheViewAuthenticPixels(despeckle_view,exception);
1949 if (sync == MagickFalse)
1956 if (image->progress_monitor != (MagickProgressMonitor) NULL)
1961 #if defined(MAGICKCORE_OPENMP_SUPPORT)
1962 #pragma omp critical (MagickCore_DespeckleImage)
1964 proceed=SetImageProgress(image,DespeckleImageTag,(MagickOffsetType)
1966 if (proceed == MagickFalse)
1970 despeckle_view=DestroyCacheView(despeckle_view);
1971 image_view=DestroyCacheView(image_view);
1972 buffers=DestroyPixelThreadSet(buffers);
1973 pixels=DestroyPixelThreadSet(pixels);
1974 despeckle_image->type=image->type;
1975 if (status == MagickFalse)
1976 despeckle_image=DestroyImage(despeckle_image);
1977 return(despeckle_image);
1981 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1985 % E d g e I m a g e %
1989 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1991 % EdgeImage() finds edges in an image. Radius defines the radius of the
1992 % convolution filter. Use a radius of 0 and EdgeImage() selects a suitable
1995 % The format of the EdgeImage method is:
1997 % Image *EdgeImage(const Image *image,const double radius,
1998 % ExceptionInfo *exception)
2000 % A description of each parameter follows:
2002 % o image: the image.
2004 % o radius: the radius of the pixel neighborhood.
2006 % o exception: return any errors or warnings in this structure.
2009 MagickExport Image *EdgeImage(const Image *image,const double radius,
2010 ExceptionInfo *exception)
2024 assert(image != (const Image *) NULL);
2025 assert(image->signature == MagickSignature);
2026 if (image->debug != MagickFalse)
2027 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
2028 assert(exception != (ExceptionInfo *) NULL);
2029 assert(exception->signature == MagickSignature);
2030 width=GetOptimalKernelWidth1D(radius,0.5);
2031 kernel=(double *) AcquireQuantumMemory((size_t) width,width*sizeof(*kernel));
2032 if (kernel == (double *) NULL)
2033 ThrowImageException(ResourceLimitError,"MemoryAllocationFailed");
2034 for (i=0; i < (ssize_t) (width*width); i++)
2036 kernel[i/2]=(double) (width*width-1.0);
2037 edge_image=ConvolveImage(image,width,kernel,exception);
2038 kernel=(double *) RelinquishMagickMemory(kernel);
2043 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
2047 % E m b o s s I m a g e %
2051 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
2053 % EmbossImage() returns a grayscale image with a three-dimensional effect.
2054 % We convolve the image with a Gaussian operator of the given radius and
2055 % standard deviation (sigma). For reasonable results, radius should be
2056 % larger than sigma. Use a radius of 0 and Emboss() selects a suitable
2059 % The format of the EmbossImage method is:
2061 % Image *EmbossImage(const Image *image,const double radius,
2062 % const double sigma,ExceptionInfo *exception)
2064 % A description of each parameter follows:
2066 % o image: the image.
2068 % o radius: the radius of the pixel neighborhood.
2070 % o sigma: the standard deviation of the Gaussian, in pixels.
2072 % o exception: return any errors or warnings in this structure.
2075 MagickExport Image *EmbossImage(const Image *image,const double radius,
2076 const double sigma,ExceptionInfo *exception)
2096 assert(image != (Image *) NULL);
2097 assert(image->signature == MagickSignature);
2098 if (image->debug != MagickFalse)
2099 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
2100 assert(exception != (ExceptionInfo *) NULL);
2101 assert(exception->signature == MagickSignature);
2102 width=GetOptimalKernelWidth2D(radius,sigma);
2103 kernel=(double *) AcquireQuantumMemory((size_t) width,width*sizeof(*kernel));
2104 if (kernel == (double *) NULL)
2105 ThrowImageException(ResourceLimitError,"MemoryAllocationFailed");
2106 j=(ssize_t) width/2;
2109 for (v=(-j); v <= j; v++)
2111 for (u=(-j); u <= j; u++)
2113 kernel[i]=(double) (((u < 0) || (v < 0) ? -8.0 : 8.0)*
2114 exp(-((double) u*u+v*v)/(2.0*MagickSigma*MagickSigma))/
2115 (2.0*MagickPI*MagickSigma*MagickSigma));
2122 emboss_image=ConvolveImage(image,width,kernel,exception);
2123 if (emboss_image != (Image *) NULL)
2124 (void) EqualizeImage(emboss_image);
2125 kernel=(double *) RelinquishMagickMemory(kernel);
2126 return(emboss_image);
2130 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
2134 % F i l t e r I m a g e %
2138 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
2140 % FilterImage() applies a custom convolution kernel to the image.
2142 % The format of the FilterImage method is:
2144 % Image *FilterImage(const Image *image,const KernelInfo *kernel,
2145 % ExceptionInfo *exception)
2146 % Image *FilterImageChannel(const Image *image,const ChannelType channel,
2147 % const KernelInfo *kernel,ExceptionInfo *exception)
2149 % A description of each parameter follows:
2151 % o image: the image.
2153 % o channel: the channel type.
2155 % o kernel: the filtering kernel.
2157 % o exception: return any errors or warnings in this structure.
2161 MagickExport Image *FilterImage(const Image *image,const KernelInfo *kernel,
2162 ExceptionInfo *exception)
2167 filter_image=FilterImageChannel(image,DefaultChannels,kernel,exception);
2168 return(filter_image);
2171 MagickExport Image *FilterImageChannel(const Image *image,
2172 const ChannelType channel,const KernelInfo *kernel,ExceptionInfo *exception)
2174 #define FilterImageTag "Filter/Image"
2196 Initialize filter image attributes.
2198 assert(image != (Image *) NULL);
2199 assert(image->signature == MagickSignature);
2200 if (image->debug != MagickFalse)
2201 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
2202 assert(exception != (ExceptionInfo *) NULL);
2203 assert(exception->signature == MagickSignature);
2204 if ((kernel->width % 2) == 0)
2205 ThrowImageException(OptionError,"KernelWidthMustBeAnOddNumber");
2206 filter_image=CloneImage(image,0,0,MagickTrue,exception);
2207 if (filter_image == (Image *) NULL)
2208 return((Image *) NULL);
2209 if (SetImageStorageClass(filter_image,DirectClass) == MagickFalse)
2211 InheritException(exception,&filter_image->exception);
2212 filter_image=DestroyImage(filter_image);
2213 return((Image *) NULL);
2215 if (image->debug != MagickFalse)
2218 format[MaxTextExtent],
2221 register const double
2228 (void) LogMagickEvent(TransformEvent,GetMagickModule(),
2229 " FilterImage with %.20gx%.20g kernel:",(double) kernel->width,(double)
2231 message=AcquireString("");
2233 for (v=0; v < (ssize_t) kernel->height; v++)
2236 (void) FormatMagickString(format,MaxTextExtent,"%.20g: ",(double) v);
2237 (void) ConcatenateString(&message,format);
2238 for (u=0; u < (ssize_t) kernel->width; u++)
2240 (void) FormatMagickString(format,MaxTextExtent,"%g ",*k++);
2241 (void) ConcatenateString(&message,format);
2243 (void) LogMagickEvent(TransformEvent,GetMagickModule(),"%s",message);
2245 message=DestroyString(message);
2247 status=AccelerateConvolveImage(image,kernel,filter_image,exception);
2248 if (status == MagickTrue)
2249 return(filter_image);
2255 GetMagickPixelPacket(image,&bias);
2256 SetMagickPixelPacketBias(image,&bias);
2257 image_view=AcquireCacheView(image);
2258 filter_view=AcquireCacheView(filter_image);
2259 #if defined(MAGICKCORE_OPENMP_SUPPORT)
2260 #pragma omp parallel for schedule(dynamic,4) shared(progress,status)
2262 for (y=0; y < (ssize_t) image->rows; y++)
2267 register const IndexPacket
2270 register const PixelPacket
2273 register IndexPacket
2274 *restrict filter_indexes;
2276 register PixelPacket
2282 if (status == MagickFalse)
2284 p=GetCacheViewVirtualPixels(image_view,-((ssize_t) kernel->width/2L),
2285 y-(ssize_t) (kernel->height/2L),image->columns+kernel->width,
2286 kernel->height,exception);
2287 q=GetCacheViewAuthenticPixels(filter_view,0,y,filter_image->columns,1,
2289 if ((p == (const PixelPacket *) NULL) || (q == (PixelPacket *) NULL))
2294 indexes=GetCacheViewVirtualIndexQueue(image_view);
2295 filter_indexes=GetCacheViewAuthenticIndexQueue(filter_view);
2296 for (x=0; x < (ssize_t) image->columns; x++)
2301 register const double
2304 register const PixelPacket
2305 *restrict kernel_pixels;
2316 if (((channel & OpacityChannel) == 0) || (image->matte == MagickFalse))
2318 for (v=0; v < (ssize_t) kernel->width; v++)
2320 for (u=0; u < (ssize_t) kernel->height; u++)
2322 pixel.red+=(*k)*kernel_pixels[u].red;
2323 pixel.green+=(*k)*kernel_pixels[u].green;
2324 pixel.blue+=(*k)*kernel_pixels[u].blue;
2327 kernel_pixels+=image->columns+kernel->width;
2329 if ((channel & RedChannel) != 0)
2330 SetRedPixelComponent(q,ClampRedPixelComponent(&pixel));
2331 if ((channel & GreenChannel) != 0)
2332 SetGreenPixelComponent(q,ClampGreenPixelComponent(&pixel));
2333 if ((channel & BlueChannel) != 0)
2334 SetBluePixelComponent(q,ClampBluePixelComponent(&pixel));
2335 if ((channel & OpacityChannel) != 0)
2339 for (v=0; v < (ssize_t) kernel->width; v++)
2341 for (u=0; u < (ssize_t) kernel->height; u++)
2343 pixel.opacity+=(*k)*kernel_pixels[u].opacity;
2346 kernel_pixels+=image->columns+kernel->width;
2348 SetOpacityPixelComponent(q,ClampOpacityPixelComponent(&pixel));
2350 if (((channel & IndexChannel) != 0) &&
2351 (image->colorspace == CMYKColorspace))
2353 register const IndexPacket
2354 *restrict kernel_indexes;
2357 kernel_indexes=indexes;
2358 for (v=0; v < (ssize_t) kernel->width; v++)
2360 for (u=0; u < (ssize_t) kernel->height; u++)
2362 pixel.index+=(*k)*kernel_indexes[u];
2365 kernel_indexes+=image->columns+kernel->width;
2367 filter_indexes[x]=ClampToQuantum(pixel.index);
2377 for (v=0; v < (ssize_t) kernel->width; v++)
2379 for (u=0; u < (ssize_t) kernel->height; u++)
2381 alpha=(MagickRealType) (QuantumScale*(QuantumRange-
2382 kernel_pixels[u].opacity));
2383 pixel.red+=(*k)*alpha*kernel_pixels[u].red;
2384 pixel.green+=(*k)*alpha*kernel_pixels[u].green;
2385 pixel.blue+=(*k)*alpha*kernel_pixels[u].blue;
2389 kernel_pixels+=image->columns+kernel->width;
2391 gamma=1.0/(fabs((double) gamma) <= MagickEpsilon ? 1.0 : gamma);
2392 if ((channel & RedChannel) != 0)
2393 q->red=ClampToQuantum(gamma*GetRedPixelComponent(&pixel));
2394 if ((channel & GreenChannel) != 0)
2395 q->green=ClampToQuantum(gamma*GetGreenPixelComponent(&pixel));
2396 if ((channel & BlueChannel) != 0)
2397 q->blue=ClampToQuantum(gamma*GetBluePixelComponent(&pixel));
2398 if ((channel & OpacityChannel) != 0)
2402 for (v=0; v < (ssize_t) kernel->width; v++)
2404 for (u=0; u < (ssize_t) kernel->height; u++)
2406 pixel.opacity+=(*k)*kernel_pixels[u].opacity;
2409 kernel_pixels+=image->columns+kernel->width;
2411 SetOpacityPixelComponent(q,ClampOpacityPixelComponent(&pixel));
2413 if (((channel & IndexChannel) != 0) &&
2414 (image->colorspace == CMYKColorspace))
2416 register const IndexPacket
2417 *restrict kernel_indexes;
2421 kernel_indexes=indexes;
2422 for (v=0; v < (ssize_t) kernel->width; v++)
2424 for (u=0; u < (ssize_t) kernel->height; u++)
2426 alpha=(MagickRealType) (QuantumScale*(QuantumRange-
2427 kernel_pixels[u].opacity));
2428 pixel.index+=(*k)*alpha*kernel_indexes[u];
2431 kernel_pixels+=image->columns+kernel->width;
2432 kernel_indexes+=image->columns+kernel->width;
2434 filter_indexes[x]=ClampToQuantum(gamma*
2435 GetIndexPixelComponent(&pixel));
2441 sync=SyncCacheViewAuthenticPixels(filter_view,exception);
2442 if (sync == MagickFalse)
2444 if (image->progress_monitor != (MagickProgressMonitor) NULL)
2449 #if defined(MAGICKCORE_OPENMP_SUPPORT)
2450 #pragma omp critical (MagickCore_FilterImageChannel)
2452 proceed=SetImageProgress(image,FilterImageTag,progress++,image->rows);
2453 if (proceed == MagickFalse)
2457 filter_image->type=image->type;
2458 filter_view=DestroyCacheView(filter_view);
2459 image_view=DestroyCacheView(image_view);
2460 if (status == MagickFalse)
2461 filter_image=DestroyImage(filter_image);
2462 return(filter_image);
2466 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
2470 % G a u s s i a n B l u r I m a g e %
2474 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
2476 % GaussianBlurImage() blurs an image. We convolve the image with a
2477 % Gaussian operator of the given radius and standard deviation (sigma).
2478 % For reasonable results, the radius should be larger than sigma. Use a
2479 % radius of 0 and GaussianBlurImage() selects a suitable radius for you
2481 % The format of the GaussianBlurImage method is:
2483 % Image *GaussianBlurImage(const Image *image,onst double radius,
2484 % const double sigma,ExceptionInfo *exception)
2485 % Image *GaussianBlurImageChannel(const Image *image,
2486 % const ChannelType channel,const double radius,const double sigma,
2487 % ExceptionInfo *exception)
2489 % A description of each parameter follows:
2491 % o image: the image.
2493 % o channel: the channel type.
2495 % o radius: the radius of the Gaussian, in pixels, not counting the center
2498 % o sigma: the standard deviation of the Gaussian, in pixels.
2500 % o exception: return any errors or warnings in this structure.
2504 MagickExport Image *GaussianBlurImage(const Image *image,const double radius,
2505 const double sigma,ExceptionInfo *exception)
2510 blur_image=GaussianBlurImageChannel(image,DefaultChannels,radius,sigma,
2515 MagickExport Image *GaussianBlurImageChannel(const Image *image,
2516 const ChannelType channel,const double radius,const double sigma,
2517 ExceptionInfo *exception)
2536 assert(image != (const Image *) NULL);
2537 assert(image->signature == MagickSignature);
2538 if (image->debug != MagickFalse)
2539 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
2540 assert(exception != (ExceptionInfo *) NULL);
2541 assert(exception->signature == MagickSignature);
2542 width=GetOptimalKernelWidth2D(radius,sigma);
2543 kernel=(double *) AcquireQuantumMemory((size_t) width,width*sizeof(*kernel));
2544 if (kernel == (double *) NULL)
2545 ThrowImageException(ResourceLimitError,"MemoryAllocationFailed");
2546 j=(ssize_t) width/2;
2548 for (v=(-j); v <= j; v++)
2550 for (u=(-j); u <= j; u++)
2551 kernel[i++]=(double) (exp(-((double) u*u+v*v)/(2.0*MagickSigma*
2552 MagickSigma))/(2.0*MagickPI*MagickSigma*MagickSigma));
2554 blur_image=ConvolveImageChannel(image,channel,width,kernel,exception);
2555 kernel=(double *) RelinquishMagickMemory(kernel);
2560 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
2564 % M e d i a n F i l t e r I m a g e %
2568 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
2570 % MedianFilterImage() applies a digital filter that improves the quality
2571 % of a noisy image. Each pixel is replaced by the median in a set of
2572 % neighboring pixels as defined by radius.
2574 % The algorithm was contributed by Mike Edmonds and implements an insertion
2575 % sort for selecting median color-channel values. For more on this algorithm
2576 % see "Skip Lists: A probabilistic Alternative to Balanced Trees" by William
2577 % Pugh in the June 1990 of Communications of the ACM.
2579 % The format of the MedianFilterImage method is:
2581 % Image *MedianFilterImage(const Image *image,const double radius,
2582 % ExceptionInfo *exception)
2584 % A description of each parameter follows:
2586 % o image: the image.
2588 % o radius: the radius of the pixel neighborhood.
2590 % o exception: return any errors or warnings in this structure.
2594 #define MedianListChannels 5
2596 typedef struct _MedianListNode
2604 typedef struct _MedianSkipList
2613 typedef struct _MedianPixelList
2621 lists[MedianListChannels];
2624 static MedianPixelList *DestroyMedianPixelList(MedianPixelList *pixel_list)
2629 if (pixel_list == (MedianPixelList *) NULL)
2630 return((MedianPixelList *) NULL);
2631 for (i=0; i < MedianListChannels; i++)
2632 if (pixel_list->lists[i].nodes != (MedianListNode *) NULL)
2633 pixel_list->lists[i].nodes=(MedianListNode *) RelinquishMagickMemory(
2634 pixel_list->lists[i].nodes);
2635 pixel_list=(MedianPixelList *) RelinquishMagickMemory(pixel_list);
2639 static MedianPixelList **DestroyMedianPixelListThreadSet(
2640 MedianPixelList **pixel_list)
2645 assert(pixel_list != (MedianPixelList **) NULL);
2646 for (i=0; i < (ssize_t) GetOpenMPMaximumThreads(); i++)
2647 if (pixel_list[i] != (MedianPixelList *) NULL)
2648 pixel_list[i]=DestroyMedianPixelList(pixel_list[i]);
2649 pixel_list=(MedianPixelList **) RelinquishMagickMemory(pixel_list);
2653 static MedianPixelList *AcquireMedianPixelList(const size_t width)
2661 pixel_list=(MedianPixelList *) AcquireMagickMemory(sizeof(*pixel_list));
2662 if (pixel_list == (MedianPixelList *) NULL)
2664 (void) ResetMagickMemory((void *) pixel_list,0,sizeof(*pixel_list));
2665 pixel_list->center=width*width/2;
2666 for (i=0; i < MedianListChannels; i++)
2668 pixel_list->lists[i].nodes=(MedianListNode *) AcquireQuantumMemory(65537UL,
2669 sizeof(*pixel_list->lists[i].nodes));
2670 if (pixel_list->lists[i].nodes == (MedianListNode *) NULL)
2671 return(DestroyMedianPixelList(pixel_list));
2672 (void) ResetMagickMemory(pixel_list->lists[i].nodes,0,65537UL*
2673 sizeof(*pixel_list->lists[i].nodes));
2675 pixel_list->signature=MagickSignature;
2679 static MedianPixelList **AcquireMedianPixelListThreadSet(const size_t width)
2690 number_threads=GetOpenMPMaximumThreads();
2691 pixel_list=(MedianPixelList **) AcquireQuantumMemory(number_threads,
2692 sizeof(*pixel_list));
2693 if (pixel_list == (MedianPixelList **) NULL)
2694 return((MedianPixelList **) NULL);
2695 (void) ResetMagickMemory(pixel_list,0,number_threads*sizeof(*pixel_list));
2696 for (i=0; i < (ssize_t) number_threads; i++)
2698 pixel_list[i]=AcquireMedianPixelList(width);
2699 if (pixel_list[i] == (MedianPixelList *) NULL)
2700 return(DestroyMedianPixelListThreadSet(pixel_list));
2705 static void AddNodeMedianPixelList(MedianPixelList *pixel_list,
2706 const ssize_t channel,const size_t color)
2708 register MedianSkipList
2719 Initialize the node.
2721 list=pixel_list->lists+channel;
2722 list->nodes[color].signature=pixel_list->signature;
2723 list->nodes[color].count=1;
2725 Determine where it belongs in the list.
2728 for (level=list->level; level >= 0; level--)
2730 while (list->nodes[search].next[level] < color)
2731 search=list->nodes[search].next[level];
2732 update[level]=search;
2735 Generate a pseudo-random level for this node.
2737 for (level=0; ; level++)
2739 pixel_list->seed=(pixel_list->seed*42893621L)+1L;
2740 if ((pixel_list->seed & 0x300) != 0x300)
2745 if (level > (list->level+2))
2746 level=list->level+2;
2748 If we're raising the list's level, link back to the root node.
2750 while (level > list->level)
2753 update[list->level]=65536UL;
2756 Link the node into the skip-list.
2760 list->nodes[color].next[level]=list->nodes[update[level]].next[level];
2761 list->nodes[update[level]].next[level]=color;
2763 while (level-- > 0);
2766 static MagickPixelPacket GetMedianPixelList(MedianPixelList *pixel_list)
2771 register MedianSkipList
2783 channels[MedianListChannels];
2786 Find the median value for each of the color.
2788 center=pixel_list->center;
2789 for (channel=0; channel < 5; channel++)
2791 list=pixel_list->lists+channel;
2796 color=list->nodes[color].next[0];
2797 count+=list->nodes[color].count;
2799 while (count <= center);
2800 channels[channel]=(unsigned short) color;
2802 GetMagickPixelPacket((const Image *) NULL,&pixel);
2803 pixel.red=(MagickRealType) ScaleShortToQuantum(channels[0]);
2804 pixel.green=(MagickRealType) ScaleShortToQuantum(channels[1]);
2805 pixel.blue=(MagickRealType) ScaleShortToQuantum(channels[2]);
2806 pixel.opacity=(MagickRealType) ScaleShortToQuantum(channels[3]);
2807 pixel.index=(MagickRealType) ScaleShortToQuantum(channels[4]);
2811 static inline void InsertMedianPixelList(const Image *image,
2812 const PixelPacket *pixel,const IndexPacket *indexes,
2813 MedianPixelList *pixel_list)
2821 index=ScaleQuantumToShort(pixel->red);
2822 signature=pixel_list->lists[0].nodes[index].signature;
2823 if (signature == pixel_list->signature)
2824 pixel_list->lists[0].nodes[index].count++;
2826 AddNodeMedianPixelList(pixel_list,0,index);
2827 index=ScaleQuantumToShort(pixel->green);
2828 signature=pixel_list->lists[1].nodes[index].signature;
2829 if (signature == pixel_list->signature)
2830 pixel_list->lists[1].nodes[index].count++;
2832 AddNodeMedianPixelList(pixel_list,1,index);
2833 index=ScaleQuantumToShort(pixel->blue);
2834 signature=pixel_list->lists[2].nodes[index].signature;
2835 if (signature == pixel_list->signature)
2836 pixel_list->lists[2].nodes[index].count++;
2838 AddNodeMedianPixelList(pixel_list,2,index);
2839 index=ScaleQuantumToShort(pixel->opacity);
2840 signature=pixel_list->lists[3].nodes[index].signature;
2841 if (signature == pixel_list->signature)
2842 pixel_list->lists[3].nodes[index].count++;
2844 AddNodeMedianPixelList(pixel_list,3,index);
2845 if (image->colorspace == CMYKColorspace)
2846 index=ScaleQuantumToShort(*indexes);
2847 signature=pixel_list->lists[4].nodes[index].signature;
2848 if (signature == pixel_list->signature)
2849 pixel_list->lists[4].nodes[index].count++;
2851 AddNodeMedianPixelList(pixel_list,4,index);
2854 static void ResetMedianPixelList(MedianPixelList *pixel_list)
2859 register MedianListNode
2862 register MedianSkipList
2869 Reset the skip-list.
2871 for (channel=0; channel < 5; channel++)
2873 list=pixel_list->lists+channel;
2874 root=list->nodes+65536UL;
2876 for (level=0; level < 9; level++)
2877 root->next[level]=65536UL;
2879 pixel_list->seed=pixel_list->signature++;
2882 MagickExport Image *MedianFilterImage(const Image *image,const double radius,
2883 ExceptionInfo *exception)
2885 #define MedianFilterImageTag "MedianFilter/Image"
2901 **restrict pixel_list;
2910 Initialize median image attributes.
2912 assert(image != (Image *) NULL);
2913 assert(image->signature == MagickSignature);
2914 if (image->debug != MagickFalse)
2915 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
2916 assert(exception != (ExceptionInfo *) NULL);
2917 assert(exception->signature == MagickSignature);
2918 width=GetOptimalKernelWidth2D(radius,0.5);
2919 if ((image->columns < width) || (image->rows < width))
2920 ThrowImageException(OptionError,"ImageSmallerThanKernelRadius");
2921 median_image=CloneImage(image,image->columns,image->rows,MagickTrue,
2923 if (median_image == (Image *) NULL)
2924 return((Image *) NULL);
2925 if (SetImageStorageClass(median_image,DirectClass) == MagickFalse)
2927 InheritException(exception,&median_image->exception);
2928 median_image=DestroyImage(median_image);
2929 return((Image *) NULL);
2931 pixel_list=AcquireMedianPixelListThreadSet(width);
2932 if (pixel_list == (MedianPixelList **) NULL)
2934 median_image=DestroyImage(median_image);
2935 ThrowImageException(ResourceLimitError,"MemoryAllocationFailed");
2938 Median filter each image row.
2942 image_view=AcquireCacheView(image);
2943 median_view=AcquireCacheView(median_image);
2944 #if defined(MAGICKCORE_OPENMP_SUPPORT)
2945 #pragma omp parallel for schedule(dynamic,4) shared(progress,status)
2947 for (y=0; y < (ssize_t) median_image->rows; y++)
2950 id = GetOpenMPThreadId();
2952 register const IndexPacket
2955 register const PixelPacket
2958 register IndexPacket
2959 *restrict median_indexes;
2961 register PixelPacket
2967 if (status == MagickFalse)
2969 p=GetCacheViewVirtualPixels(image_view,-((ssize_t) width/2L),y-(ssize_t)
2970 (width/2L),image->columns+width,width,exception);
2971 q=QueueCacheViewAuthenticPixels(median_view,0,y,median_image->columns,1,
2973 if ((p == (const PixelPacket *) NULL) || (q == (PixelPacket *) NULL))
2978 indexes=GetCacheViewVirtualIndexQueue(image_view);
2979 median_indexes=GetCacheViewAuthenticIndexQueue(median_view);
2980 for (x=0; x < (ssize_t) median_image->columns; x++)
2985 register const IndexPacket
2988 register const PixelPacket
2997 ResetMedianPixelList(pixel_list[id]);
2998 for (v=0; v < (ssize_t) width; v++)
3000 for (u=0; u < (ssize_t) width; u++)
3001 InsertMedianPixelList(image,r+u,s+u,pixel_list[id]);
3002 r+=image->columns+width;
3003 s+=image->columns+width;
3005 pixel=GetMedianPixelList(pixel_list[id]);
3006 SetPixelPacket(median_image,&pixel,q,median_indexes+x);
3010 if (SyncCacheViewAuthenticPixels(median_view,exception) == MagickFalse)
3012 if (image->progress_monitor != (MagickProgressMonitor) NULL)
3017 #if defined(MAGICKCORE_OPENMP_SUPPORT)
3018 #pragma omp critical (MagickCore_MedianFilterImage)
3020 proceed=SetImageProgress(image,MedianFilterImageTag,progress++,
3022 if (proceed == MagickFalse)
3026 median_view=DestroyCacheView(median_view);
3027 image_view=DestroyCacheView(image_view);
3028 pixel_list=DestroyMedianPixelListThreadSet(pixel_list);
3029 return(median_image);
3033 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3037 % M o t i o n B l u r I m a g e %
3041 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3043 % MotionBlurImage() simulates motion blur. We convolve the image with a
3044 % Gaussian operator of the given radius and standard deviation (sigma).
3045 % For reasonable results, radius should be larger than sigma. Use a
3046 % radius of 0 and MotionBlurImage() selects a suitable radius for you.
3047 % Angle gives the angle of the blurring motion.
3049 % Andrew Protano contributed this effect.
3051 % The format of the MotionBlurImage method is:
3053 % Image *MotionBlurImage(const Image *image,const double radius,
3054 % const double sigma,const double angle,ExceptionInfo *exception)
3055 % Image *MotionBlurImageChannel(const Image *image,const ChannelType channel,
3056 % const double radius,const double sigma,const double angle,
3057 % ExceptionInfo *exception)
3059 % A description of each parameter follows:
3061 % o image: the image.
3063 % o channel: the channel type.
3065 % o radius: the radius of the Gaussian, in pixels, not counting the center
3066 % o radius: the radius of the Gaussian, in pixels, not counting
3069 % o sigma: the standard deviation of the Gaussian, in pixels.
3071 % o angle: Apply the effect along this angle.
3073 % o exception: return any errors or warnings in this structure.
3077 static double *GetMotionBlurKernel(const size_t width,const double sigma)
3087 Generate a 1-D convolution kernel.
3089 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"...");
3090 kernel=(double *) AcquireQuantumMemory((size_t) width,sizeof(*kernel));
3091 if (kernel == (double *) NULL)
3094 for (i=0; i < (ssize_t) width; i++)
3096 kernel[i]=(double) (exp((-((double) i*i)/(double) (2.0*MagickSigma*
3097 MagickSigma)))/(MagickSQ2PI*MagickSigma));
3098 normalize+=kernel[i];
3100 for (i=0; i < (ssize_t) width; i++)
3101 kernel[i]/=normalize;
3105 MagickExport Image *MotionBlurImage(const Image *image,const double radius,
3106 const double sigma,const double angle,ExceptionInfo *exception)
3111 motion_blur=MotionBlurImageChannel(image,DefaultChannels,radius,sigma,angle,
3113 return(motion_blur);
3116 MagickExport Image *MotionBlurImageChannel(const Image *image,
3117 const ChannelType channel,const double radius,const double sigma,
3118 const double angle,ExceptionInfo *exception)
3154 assert(image != (Image *) NULL);
3155 assert(image->signature == MagickSignature);
3156 if (image->debug != MagickFalse)
3157 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
3158 assert(exception != (ExceptionInfo *) NULL);
3159 width=GetOptimalKernelWidth1D(radius,sigma);
3160 kernel=GetMotionBlurKernel(width,sigma);
3161 if (kernel == (double *) NULL)
3162 ThrowImageException(ResourceLimitError,"MemoryAllocationFailed");
3163 offset=(OffsetInfo *) AcquireQuantumMemory(width,sizeof(*offset));
3164 if (offset == (OffsetInfo *) NULL)
3166 kernel=(double *) RelinquishMagickMemory(kernel);
3167 ThrowImageException(ResourceLimitError,"MemoryAllocationFailed");
3169 blur_image=CloneImage(image,0,0,MagickTrue,exception);
3170 if (blur_image == (Image *) NULL)
3172 kernel=(double *) RelinquishMagickMemory(kernel);
3173 offset=(OffsetInfo *) RelinquishMagickMemory(offset);
3174 return((Image *) NULL);
3176 if (SetImageStorageClass(blur_image,DirectClass) == MagickFalse)
3178 kernel=(double *) RelinquishMagickMemory(kernel);
3179 offset=(OffsetInfo *) RelinquishMagickMemory(offset);
3180 InheritException(exception,&blur_image->exception);
3181 blur_image=DestroyImage(blur_image);
3182 return((Image *) NULL);
3184 point.x=(double) width*sin(DegreesToRadians(angle));
3185 point.y=(double) width*cos(DegreesToRadians(angle));
3186 for (i=0; i < (ssize_t) width; i++)
3188 offset[i].x=(ssize_t) ceil((double) (i*point.y)/hypot(point.x,point.y)-0.5);
3189 offset[i].y=(ssize_t) ceil((double) (i*point.x)/hypot(point.x,point.y)-0.5);
3196 GetMagickPixelPacket(image,&bias);
3197 image_view=AcquireCacheView(image);
3198 blur_view=AcquireCacheView(blur_image);
3199 #if defined(MAGICKCORE_OPENMP_SUPPORT)
3200 #pragma omp parallel for schedule(dynamic,4) shared(progress,status)
3202 for (y=0; y < (ssize_t) image->rows; y++)
3204 register IndexPacket
3205 *restrict blur_indexes;
3207 register PixelPacket
3213 if (status == MagickFalse)
3215 q=GetCacheViewAuthenticPixels(blur_view,0,y,blur_image->columns,1,
3217 if (q == (PixelPacket *) NULL)
3222 blur_indexes=GetCacheViewAuthenticIndexQueue(blur_view);
3223 for (x=0; x < (ssize_t) image->columns; x++)
3231 register const IndexPacket
3242 if (((channel & OpacityChannel) == 0) || (image->matte == MagickFalse))
3244 for (i=0; i < (ssize_t) width; i++)
3246 (void) GetOneCacheViewVirtualPixel(image_view,x+offset[i].x,y+
3247 offset[i].y,&pixel,exception);
3248 qixel.red+=(*k)*pixel.red;
3249 qixel.green+=(*k)*pixel.green;
3250 qixel.blue+=(*k)*pixel.blue;
3251 qixel.opacity+=(*k)*pixel.opacity;
3252 if (image->colorspace == CMYKColorspace)
3254 indexes=GetCacheViewVirtualIndexQueue(image_view);
3255 qixel.index+=(*k)*(*indexes);
3259 if ((channel & RedChannel) != 0)
3260 q->red=ClampToQuantum(qixel.red);
3261 if ((channel & GreenChannel) != 0)
3262 q->green=ClampToQuantum(qixel.green);
3263 if ((channel & BlueChannel) != 0)
3264 q->blue=ClampToQuantum(qixel.blue);
3265 if ((channel & OpacityChannel) != 0)
3266 q->opacity=ClampToQuantum(qixel.opacity);
3267 if (((channel & IndexChannel) != 0) &&
3268 (image->colorspace == CMYKColorspace))
3269 blur_indexes[x]=(IndexPacket) ClampToQuantum(qixel.index);
3279 for (i=0; i < (ssize_t) width; i++)
3281 (void) GetOneCacheViewVirtualPixel(image_view,x+offset[i].x,y+
3282 offset[i].y,&pixel,exception);
3283 alpha=(MagickRealType) (QuantumScale*
3284 GetAlphaPixelComponent(&pixel));
3285 qixel.red+=(*k)*alpha*pixel.red;
3286 qixel.green+=(*k)*alpha*pixel.green;
3287 qixel.blue+=(*k)*alpha*pixel.blue;
3288 qixel.opacity+=(*k)*pixel.opacity;
3289 if (image->colorspace == CMYKColorspace)
3291 indexes=GetCacheViewVirtualIndexQueue(image_view);
3292 qixel.index+=(*k)*alpha*(*indexes);
3297 gamma=1.0/(fabs((double) gamma) <= MagickEpsilon ? 1.0 : gamma);
3298 if ((channel & RedChannel) != 0)
3299 q->red=ClampToQuantum(gamma*qixel.red);
3300 if ((channel & GreenChannel) != 0)
3301 q->green=ClampToQuantum(gamma*qixel.green);
3302 if ((channel & BlueChannel) != 0)
3303 q->blue=ClampToQuantum(gamma*qixel.blue);
3304 if ((channel & OpacityChannel) != 0)
3305 q->opacity=ClampToQuantum(qixel.opacity);
3306 if (((channel & IndexChannel) != 0) &&
3307 (image->colorspace == CMYKColorspace))
3308 blur_indexes[x]=(IndexPacket) ClampToQuantum(gamma*qixel.index);
3312 if (SyncCacheViewAuthenticPixels(blur_view,exception) == MagickFalse)
3314 if (image->progress_monitor != (MagickProgressMonitor) NULL)
3319 #if defined(MAGICKCORE_OPENMP_SUPPORT)
3320 #pragma omp critical (MagickCore_MotionBlurImageChannel)
3322 proceed=SetImageProgress(image,BlurImageTag,progress++,image->rows);
3323 if (proceed == MagickFalse)
3327 blur_view=DestroyCacheView(blur_view);
3328 image_view=DestroyCacheView(image_view);
3329 kernel=(double *) RelinquishMagickMemory(kernel);
3330 offset=(OffsetInfo *) RelinquishMagickMemory(offset);
3331 if (status == MagickFalse)
3332 blur_image=DestroyImage(blur_image);
3337 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3341 % P r e v i e w I m a g e %
3345 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3347 % PreviewImage() tiles 9 thumbnails of the specified image with an image
3348 % processing operation applied with varying parameters. This may be helpful
3349 % pin-pointing an appropriate parameter for a particular image processing
3352 % The format of the PreviewImages method is:
3354 % Image *PreviewImages(const Image *image,const PreviewType preview,
3355 % ExceptionInfo *exception)
3357 % A description of each parameter follows:
3359 % o image: the image.
3361 % o preview: the image processing operation.
3363 % o exception: return any errors or warnings in this structure.
3366 MagickExport Image *PreviewImage(const Image *image,const PreviewType preview,
3367 ExceptionInfo *exception)
3369 #define NumberTiles 9
3370 #define PreviewImageTag "Preview/Image"
3371 #define DefaultPreviewGeometry "204x204+10+10"
3374 factor[MaxTextExtent],
3375 label[MaxTextExtent];
3417 Open output image file.
3419 assert(image != (Image *) NULL);
3420 assert(image->signature == MagickSignature);
3421 if (image->debug != MagickFalse)
3422 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
3426 preview_info=AcquireImageInfo();
3427 SetGeometry(image,&geometry);
3428 (void) ParseMetaGeometry(DefaultPreviewGeometry,&geometry.x,&geometry.y,
3429 &geometry.width,&geometry.height);
3430 images=NewImageList();
3432 GetQuantizeInfo(&quantize_info);
3438 for (i=0; i < NumberTiles; i++)
3440 thumbnail=ThumbnailImage(image,geometry.width,geometry.height,exception);
3441 if (thumbnail == (Image *) NULL)
3443 (void) SetImageProgressMonitor(thumbnail,(MagickProgressMonitor) NULL,
3445 (void) SetImageProperty(thumbnail,"label",DefaultTileLabel);
3446 if (i == (NumberTiles/2))
3448 (void) QueryColorDatabase("#dfdfdf",&thumbnail->matte_color,exception);
3449 AppendImageToList(&images,thumbnail);
3457 preview_image=RotateImage(thumbnail,degrees,exception);
3458 (void) FormatMagickString(label,MaxTextExtent,"rotate %g",degrees);
3464 preview_image=ShearImage(thumbnail,degrees,degrees,exception);
3465 (void) FormatMagickString(label,MaxTextExtent,"shear %gx%g",
3466 degrees,2.0*degrees);
3471 x=(ssize_t) ((i+1)*thumbnail->columns)/NumberTiles;
3472 y=(ssize_t) ((i+1)*thumbnail->rows)/NumberTiles;
3473 preview_image=RollImage(thumbnail,x,y,exception);
3474 (void) FormatMagickString(label,MaxTextExtent,"roll %+.20gx%+.20g",
3475 (double) x,(double) y);
3480 preview_image=CloneImage(thumbnail,0,0,MagickTrue,exception);
3481 if (preview_image == (Image *) NULL)
3483 (void) FormatMagickString(factor,MaxTextExtent,"100,100,%g",
3485 (void) ModulateImage(preview_image,factor);
3486 (void) FormatMagickString(label,MaxTextExtent,"modulate %s",factor);
3489 case SaturationPreview:
3491 preview_image=CloneImage(thumbnail,0,0,MagickTrue,exception);
3492 if (preview_image == (Image *) NULL)
3494 (void) FormatMagickString(factor,MaxTextExtent,"100,%g",
3496 (void) ModulateImage(preview_image,factor);
3497 (void) FormatMagickString(label,MaxTextExtent,"modulate %s",factor);
3500 case BrightnessPreview:
3502 preview_image=CloneImage(thumbnail,0,0,MagickTrue,exception);
3503 if (preview_image == (Image *) NULL)
3505 (void) FormatMagickString(factor,MaxTextExtent,"%g",2.0*percentage);
3506 (void) ModulateImage(preview_image,factor);
3507 (void) FormatMagickString(label,MaxTextExtent,"modulate %s",factor);
3513 preview_image=CloneImage(thumbnail,0,0,MagickTrue,exception);
3514 if (preview_image == (Image *) NULL)
3517 (void) GammaImageChannel(preview_image,DefaultChannels,gamma);
3518 (void) FormatMagickString(label,MaxTextExtent,"gamma %g",gamma);
3523 preview_image=CloneImage(thumbnail,0,0,MagickTrue,exception);
3524 if (preview_image != (Image *) NULL)
3525 for (x=0; x < i; x++)
3526 (void) ContrastImage(preview_image,MagickTrue);
3527 (void) FormatMagickString(label,MaxTextExtent,"contrast (%.20g)",
3533 preview_image=CloneImage(thumbnail,0,0,MagickTrue,exception);
3534 if (preview_image == (Image *) NULL)
3536 for (x=0; x < i; x++)
3537 (void) ContrastImage(preview_image,MagickFalse);
3538 (void) FormatMagickString(label,MaxTextExtent,"+contrast (%.20g)",
3542 case GrayscalePreview:
3544 preview_image=CloneImage(thumbnail,0,0,MagickTrue,exception);
3545 if (preview_image == (Image *) NULL)
3548 quantize_info.number_colors=colors;
3549 quantize_info.colorspace=GRAYColorspace;
3550 (void) QuantizeImage(&quantize_info,preview_image);
3551 (void) FormatMagickString(label,MaxTextExtent,
3552 "-colorspace gray -colors %.20g",(double) colors);
3555 case QuantizePreview:
3557 preview_image=CloneImage(thumbnail,0,0,MagickTrue,exception);
3558 if (preview_image == (Image *) NULL)
3561 quantize_info.number_colors=colors;
3562 (void) QuantizeImage(&quantize_info,preview_image);
3563 (void) FormatMagickString(label,MaxTextExtent,"colors %.20g",(double)
3567 case DespecklePreview:
3569 for (x=0; x < (i-1); x++)
3571 preview_image=DespeckleImage(thumbnail,exception);
3572 if (preview_image == (Image *) NULL)
3574 thumbnail=DestroyImage(thumbnail);
3575 thumbnail=preview_image;
3577 preview_image=DespeckleImage(thumbnail,exception);
3578 if (preview_image == (Image *) NULL)
3580 (void) FormatMagickString(label,MaxTextExtent,"despeckle (%.20g)",
3584 case ReduceNoisePreview:
3586 preview_image=ReduceNoiseImage(thumbnail,radius,exception);
3587 (void) FormatMagickString(label,MaxTextExtent,"noise %g",radius);
3590 case AddNoisePreview:
3596 (void) CopyMagickString(factor,"uniform",MaxTextExtent);
3601 (void) CopyMagickString(factor,"gaussian",MaxTextExtent);
3606 (void) CopyMagickString(factor,"multiplicative",MaxTextExtent);
3611 (void) CopyMagickString(factor,"impulse",MaxTextExtent);
3616 (void) CopyMagickString(factor,"laplacian",MaxTextExtent);
3621 (void) CopyMagickString(factor,"Poisson",MaxTextExtent);
3626 (void) CopyMagickString(thumbnail->magick,"NULL",MaxTextExtent);
3630 preview_image=ReduceNoiseImage(thumbnail,(double) i,exception);
3631 (void) FormatMagickString(label,MaxTextExtent,"+noise %s",factor);
3634 case SharpenPreview:
3636 preview_image=SharpenImage(thumbnail,radius,sigma,exception);
3637 (void) FormatMagickString(label,MaxTextExtent,"sharpen %gx%g",
3643 preview_image=BlurImage(thumbnail,radius,sigma,exception);
3644 (void) FormatMagickString(label,MaxTextExtent,"blur %gx%g",radius,
3648 case ThresholdPreview:
3650 preview_image=CloneImage(thumbnail,0,0,MagickTrue,exception);
3651 if (preview_image == (Image *) NULL)
3653 (void) BilevelImage(thumbnail,
3654 (double) (percentage*((MagickRealType) QuantumRange+1.0))/100.0);
3655 (void) FormatMagickString(label,MaxTextExtent,"threshold %g",
3656 (double) (percentage*((MagickRealType) QuantumRange+1.0))/100.0);
3659 case EdgeDetectPreview:
3661 preview_image=EdgeImage(thumbnail,radius,exception);
3662 (void) FormatMagickString(label,MaxTextExtent,"edge %g",radius);
3667 preview_image=SpreadImage(thumbnail,radius,exception);
3668 (void) FormatMagickString(label,MaxTextExtent,"spread %g",
3672 case SolarizePreview:
3674 preview_image=CloneImage(thumbnail,0,0,MagickTrue,exception);
3675 if (preview_image == (Image *) NULL)
3677 (void) SolarizeImage(preview_image,(double) QuantumRange*
3679 (void) FormatMagickString(label,MaxTextExtent,"solarize %g",
3680 (QuantumRange*percentage)/100.0);
3686 preview_image=ShadeImage(thumbnail,MagickTrue,degrees,degrees,
3688 (void) FormatMagickString(label,MaxTextExtent,"shade %gx%g",
3694 preview_image=CloneImage(thumbnail,0,0,MagickTrue,exception);
3695 if (preview_image == (Image *) NULL)
3697 geometry.width=(size_t) (2*i+2);
3698 geometry.height=(size_t) (2*i+2);
3701 (void) RaiseImage(preview_image,&geometry,MagickTrue);
3702 (void) FormatMagickString(label,MaxTextExtent,
3703 "raise %.20gx%.20g%+.20g%+.20g",(double) geometry.width,(double)
3704 geometry.height,(double) geometry.x,(double) geometry.y);
3707 case SegmentPreview:
3709 preview_image=CloneImage(thumbnail,0,0,MagickTrue,exception);
3710 if (preview_image == (Image *) NULL)
3713 (void) SegmentImage(preview_image,RGBColorspace,MagickFalse,threshold,
3715 (void) FormatMagickString(label,MaxTextExtent,"segment %gx%g",
3716 threshold,threshold);
3721 preview_image=SwirlImage(thumbnail,degrees,exception);
3722 (void) FormatMagickString(label,MaxTextExtent,"swirl %g",degrees);
3726 case ImplodePreview:
3729 preview_image=ImplodeImage(thumbnail,degrees,exception);
3730 (void) FormatMagickString(label,MaxTextExtent,"implode %g",degrees);
3736 preview_image=WaveImage(thumbnail,0.5*degrees,2.0*degrees,exception);
3737 (void) FormatMagickString(label,MaxTextExtent,"wave %gx%g",
3738 0.5*degrees,2.0*degrees);
3741 case OilPaintPreview:
3743 preview_image=OilPaintImage(thumbnail,(double) radius,exception);
3744 (void) FormatMagickString(label,MaxTextExtent,"paint %g",radius);
3747 case CharcoalDrawingPreview:
3749 preview_image=CharcoalImage(thumbnail,(double) radius,(double) sigma,
3751 (void) FormatMagickString(label,MaxTextExtent,"charcoal %gx%g",
3758 filename[MaxTextExtent];
3766 preview_image=CloneImage(thumbnail,0,0,MagickTrue,exception);
3767 if (preview_image == (Image *) NULL)
3769 preview_info->quality=(size_t) percentage;
3770 (void) FormatMagickString(factor,MaxTextExtent,"%.20g",(double)
3771 preview_info->quality);
3772 file=AcquireUniqueFileResource(filename);
3775 (void) FormatMagickString(preview_image->filename,MaxTextExtent,
3776 "jpeg:%s",filename);
3777 status=WriteImage(preview_info,preview_image);
3778 if (status != MagickFalse)
3783 (void) CopyMagickString(preview_info->filename,
3784 preview_image->filename,MaxTextExtent);
3785 quality_image=ReadImage(preview_info,exception);
3786 if (quality_image != (Image *) NULL)
3788 preview_image=DestroyImage(preview_image);
3789 preview_image=quality_image;
3792 (void) RelinquishUniqueFileResource(preview_image->filename);
3793 if ((GetBlobSize(preview_image)/1024) >= 1024)
3794 (void) FormatMagickString(label,MaxTextExtent,"quality %s\n%gmb ",
3795 factor,(double) ((MagickOffsetType) GetBlobSize(preview_image))/
3798 if (GetBlobSize(preview_image) >= 1024)
3799 (void) FormatMagickString(label,MaxTextExtent,
3800 "quality %s\n%gkb ",factor,(double) ((MagickOffsetType)
3801 GetBlobSize(preview_image))/1024.0);
3803 (void) FormatMagickString(label,MaxTextExtent,"quality %s\n%.20gb ",
3804 factor,(double) GetBlobSize(thumbnail));
3808 thumbnail=DestroyImage(thumbnail);
3812 if (preview_image == (Image *) NULL)
3814 (void) DeleteImageProperty(preview_image,"label");
3815 (void) SetImageProperty(preview_image,"label",label);
3816 AppendImageToList(&images,preview_image);
3817 proceed=SetImageProgress(image,PreviewImageTag,(MagickOffsetType) i,
3819 if (proceed == MagickFalse)
3822 if (images == (Image *) NULL)
3824 preview_info=DestroyImageInfo(preview_info);
3825 return((Image *) NULL);
3830 montage_info=CloneMontageInfo(preview_info,(MontageInfo *) NULL);
3831 (void) CopyMagickString(montage_info->filename,image->filename,MaxTextExtent);
3832 montage_info->shadow=MagickTrue;
3833 (void) CloneString(&montage_info->tile,"3x3");
3834 (void) CloneString(&montage_info->geometry,DefaultPreviewGeometry);
3835 (void) CloneString(&montage_info->frame,DefaultTileFrame);
3836 montage_image=MontageImages(images,montage_info,exception);
3837 montage_info=DestroyMontageInfo(montage_info);
3838 images=DestroyImageList(images);
3839 if (montage_image == (Image *) NULL)
3840 ThrowImageException(ResourceLimitError,"MemoryAllocationFailed");
3841 if (montage_image->montage != (char *) NULL)
3844 Free image directory.
3846 montage_image->montage=(char *) RelinquishMagickMemory(
3847 montage_image->montage);
3848 if (image->directory != (char *) NULL)
3849 montage_image->directory=(char *) RelinquishMagickMemory(
3850 montage_image->directory);
3852 preview_info=DestroyImageInfo(preview_info);
3853 return(montage_image);
3857 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3861 % R a d i a l B l u r I m a g e %
3865 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3867 % RadialBlurImage() applies a radial blur to the image.
3869 % Andrew Protano contributed this effect.
3871 % The format of the RadialBlurImage method is:
3873 % Image *RadialBlurImage(const Image *image,const double angle,
3874 % ExceptionInfo *exception)
3875 % Image *RadialBlurImageChannel(const Image *image,const ChannelType channel,
3876 % const double angle,ExceptionInfo *exception)
3878 % A description of each parameter follows:
3880 % o image: the image.
3882 % o channel: the channel type.
3884 % o angle: the angle of the radial blur.
3886 % o exception: return any errors or warnings in this structure.
3890 MagickExport Image *RadialBlurImage(const Image *image,const double angle,
3891 ExceptionInfo *exception)
3896 blur_image=RadialBlurImageChannel(image,DefaultChannels,angle,exception);
3900 MagickExport Image *RadialBlurImageChannel(const Image *image,
3901 const ChannelType channel,const double angle,ExceptionInfo *exception)
3939 Allocate blur image.
3941 assert(image != (Image *) NULL);
3942 assert(image->signature == MagickSignature);
3943 if (image->debug != MagickFalse)
3944 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
3945 assert(exception != (ExceptionInfo *) NULL);
3946 assert(exception->signature == MagickSignature);
3947 blur_image=CloneImage(image,0,0,MagickTrue,exception);
3948 if (blur_image == (Image *) NULL)
3949 return((Image *) NULL);
3950 if (SetImageStorageClass(blur_image,DirectClass) == MagickFalse)
3952 InheritException(exception,&blur_image->exception);
3953 blur_image=DestroyImage(blur_image);
3954 return((Image *) NULL);
3956 blur_center.x=(double) image->columns/2.0;
3957 blur_center.y=(double) image->rows/2.0;
3958 blur_radius=hypot(blur_center.x,blur_center.y);
3959 n=(size_t) fabs(4.0*DegreesToRadians(angle)*sqrt((double) blur_radius)+2UL);
3960 theta=DegreesToRadians(angle)/(MagickRealType) (n-1);
3961 cos_theta=(MagickRealType *) AcquireQuantumMemory((size_t) n,
3962 sizeof(*cos_theta));
3963 sin_theta=(MagickRealType *) AcquireQuantumMemory((size_t) n,
3964 sizeof(*sin_theta));
3965 if ((cos_theta == (MagickRealType *) NULL) ||
3966 (sin_theta == (MagickRealType *) NULL))
3968 blur_image=DestroyImage(blur_image);
3969 ThrowImageException(ResourceLimitError,"MemoryAllocationFailed");
3971 offset=theta*(MagickRealType) (n-1)/2.0;
3972 for (i=0; i < (ssize_t) n; i++)
3974 cos_theta[i]=cos((double) (theta*i-offset));
3975 sin_theta[i]=sin((double) (theta*i-offset));
3982 GetMagickPixelPacket(image,&bias);
3983 image_view=AcquireCacheView(image);
3984 blur_view=AcquireCacheView(blur_image);
3985 #if defined(MAGICKCORE_OPENMP_SUPPORT)
3986 #pragma omp parallel for schedule(dynamic,4) shared(progress,status)
3988 for (y=0; y < (ssize_t) blur_image->rows; y++)
3990 register const IndexPacket
3993 register IndexPacket
3994 *restrict blur_indexes;
3996 register PixelPacket
4002 if (status == MagickFalse)
4004 q=GetCacheViewAuthenticPixels(blur_view,0,y,blur_image->columns,1,
4006 if (q == (PixelPacket *) NULL)
4011 blur_indexes=GetCacheViewAuthenticIndexQueue(blur_view);
4012 for (x=0; x < (ssize_t) blur_image->columns; x++)
4033 center.x=(double) x-blur_center.x;
4034 center.y=(double) y-blur_center.y;
4035 radius=hypot((double) center.x,center.y);
4040 step=(size_t) (blur_radius/radius);
4049 if (((channel & OpacityChannel) == 0) || (image->matte == MagickFalse))
4051 for (i=0; i < (ssize_t) n; i+=(ssize_t) step)
4053 (void) GetOneCacheViewVirtualPixel(image_view,(ssize_t)
4054 (blur_center.x+center.x*cos_theta[i]-center.y*sin_theta[i]+0.5),
4055 (ssize_t) (blur_center.y+center.x*sin_theta[i]+center.y*
4056 cos_theta[i]+0.5),&pixel,exception);
4057 qixel.red+=pixel.red;
4058 qixel.green+=pixel.green;
4059 qixel.blue+=pixel.blue;
4060 qixel.opacity+=pixel.opacity;
4061 if (image->colorspace == CMYKColorspace)
4063 indexes=GetCacheViewVirtualIndexQueue(image_view);
4064 qixel.index+=(*indexes);
4068 normalize=1.0/(fabs((double) normalize) <= MagickEpsilon ? 1.0 :
4070 if ((channel & RedChannel) != 0)
4071 q->red=ClampToQuantum(normalize*qixel.red);
4072 if ((channel & GreenChannel) != 0)
4073 q->green=ClampToQuantum(normalize*qixel.green);
4074 if ((channel & BlueChannel) != 0)
4075 q->blue=ClampToQuantum(normalize*qixel.blue);
4076 if ((channel & OpacityChannel) != 0)
4077 q->opacity=ClampToQuantum(normalize*qixel.opacity);
4078 if (((channel & IndexChannel) != 0) &&
4079 (image->colorspace == CMYKColorspace))
4080 blur_indexes[x]=(IndexPacket) ClampToQuantum(normalize*qixel.index);
4090 for (i=0; i < (ssize_t) n; i+=(ssize_t) step)
4092 (void) GetOneCacheViewVirtualPixel(image_view,(ssize_t)
4093 (blur_center.x+center.x*cos_theta[i]-center.y*sin_theta[i]+0.5),
4094 (ssize_t) (blur_center.y+center.x*sin_theta[i]+center.y*
4095 cos_theta[i]+0.5),&pixel,exception);
4096 alpha=(MagickRealType) (QuantumScale*
4097 GetAlphaPixelComponent(&pixel));
4098 qixel.red+=alpha*pixel.red;
4099 qixel.green+=alpha*pixel.green;
4100 qixel.blue+=alpha*pixel.blue;
4101 qixel.opacity+=pixel.opacity;
4102 if (image->colorspace == CMYKColorspace)
4104 indexes=GetCacheViewVirtualIndexQueue(image_view);
4105 qixel.index+=alpha*(*indexes);
4110 gamma=1.0/(fabs((double) gamma) <= MagickEpsilon ? 1.0 : gamma);
4111 normalize=1.0/(fabs((double) normalize) <= MagickEpsilon ? 1.0 :
4113 if ((channel & RedChannel) != 0)
4114 q->red=ClampToQuantum(gamma*qixel.red);
4115 if ((channel & GreenChannel) != 0)
4116 q->green=ClampToQuantum(gamma*qixel.green);
4117 if ((channel & BlueChannel) != 0)
4118 q->blue=ClampToQuantum(gamma*qixel.blue);
4119 if ((channel & OpacityChannel) != 0)
4120 q->opacity=ClampToQuantum(normalize*qixel.opacity);
4121 if (((channel & IndexChannel) != 0) &&
4122 (image->colorspace == CMYKColorspace))
4123 blur_indexes[x]=(IndexPacket) ClampToQuantum(gamma*qixel.index);
4127 if (SyncCacheViewAuthenticPixels(blur_view,exception) == MagickFalse)
4129 if (image->progress_monitor != (MagickProgressMonitor) NULL)
4134 #if defined(MAGICKCORE_OPENMP_SUPPORT)
4135 #pragma omp critical (MagickCore_RadialBlurImageChannel)
4137 proceed=SetImageProgress(image,BlurImageTag,progress++,image->rows);
4138 if (proceed == MagickFalse)
4142 blur_view=DestroyCacheView(blur_view);
4143 image_view=DestroyCacheView(image_view);
4144 cos_theta=(MagickRealType *) RelinquishMagickMemory(cos_theta);
4145 sin_theta=(MagickRealType *) RelinquishMagickMemory(sin_theta);
4146 if (status == MagickFalse)
4147 blur_image=DestroyImage(blur_image);
4152 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4156 % R e d u c e N o i s e I m a g e %
4160 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4162 % ReduceNoiseImage() smooths the contours of an image while still preserving
4163 % edge information. The algorithm works by replacing each pixel with its
4164 % neighbor closest in value. A neighbor is defined by radius. Use a radius
4165 % of 0 and ReduceNoise() selects a suitable radius for you.
4167 % The format of the ReduceNoiseImage method is:
4169 % Image *ReduceNoiseImage(const Image *image,const double radius,
4170 % ExceptionInfo *exception)
4172 % A description of each parameter follows:
4174 % o image: the image.
4176 % o radius: the radius of the pixel neighborhood.
4178 % o exception: return any errors or warnings in this structure.
4182 static MagickPixelPacket GetNonpeakMedianPixelList(MedianPixelList *pixel_list)
4187 register MedianSkipList
4204 Finds the median value for each of the color.
4206 center=pixel_list->center;
4207 for (channel=0; channel < 5; channel++)
4209 list=pixel_list->lists+channel;
4211 next=list->nodes[color].next[0];
4217 next=list->nodes[color].next[0];
4218 count+=list->nodes[color].count;
4220 while (count <= center);
4221 if ((previous == 65536UL) && (next != 65536UL))
4224 if ((previous != 65536UL) && (next == 65536UL))
4226 channels[channel]=(unsigned short) color;
4228 GetMagickPixelPacket((const Image *) NULL,&pixel);
4229 pixel.red=(MagickRealType) ScaleShortToQuantum(channels[0]);
4230 pixel.green=(MagickRealType) ScaleShortToQuantum(channels[1]);
4231 pixel.blue=(MagickRealType) ScaleShortToQuantum(channels[2]);
4232 pixel.opacity=(MagickRealType) ScaleShortToQuantum(channels[3]);
4233 pixel.index=(MagickRealType) ScaleShortToQuantum(channels[4]);
4237 MagickExport Image *ReduceNoiseImage(const Image *image,const double radius,
4238 ExceptionInfo *exception)
4240 #define ReduceNoiseImageTag "ReduceNoise/Image"
4256 **restrict pixel_list;
4265 Initialize noise image attributes.
4267 assert(image != (Image *) NULL);
4268 assert(image->signature == MagickSignature);
4269 if (image->debug != MagickFalse)
4270 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
4271 assert(exception != (ExceptionInfo *) NULL);
4272 assert(exception->signature == MagickSignature);
4273 width=GetOptimalKernelWidth2D(radius,0.5);
4274 if ((image->columns < width) || (image->rows < width))
4275 ThrowImageException(OptionError,"ImageSmallerThanKernelRadius");
4276 noise_image=CloneImage(image,image->columns,image->rows,MagickTrue,
4278 if (noise_image == (Image *) NULL)
4279 return((Image *) NULL);
4280 if (SetImageStorageClass(noise_image,DirectClass) == MagickFalse)
4282 InheritException(exception,&noise_image->exception);
4283 noise_image=DestroyImage(noise_image);
4284 return((Image *) NULL);
4286 pixel_list=AcquireMedianPixelListThreadSet(width);
4287 if (pixel_list == (MedianPixelList **) NULL)
4289 noise_image=DestroyImage(noise_image);
4290 ThrowImageException(ResourceLimitError,"MemoryAllocationFailed");
4297 image_view=AcquireCacheView(image);
4298 noise_view=AcquireCacheView(noise_image);
4299 #if defined(MAGICKCORE_OPENMP_SUPPORT)
4300 #pragma omp parallel for schedule(dynamic,4) shared(progress,status)
4302 for (y=0; y < (ssize_t) noise_image->rows; y++)
4305 id = GetOpenMPThreadId();
4307 register const IndexPacket
4310 register const PixelPacket
4313 register IndexPacket
4314 *restrict noise_indexes;
4316 register PixelPacket
4322 if (status == MagickFalse)
4324 p=GetCacheViewVirtualPixels(image_view,-((ssize_t) width/2L),y-(ssize_t)
4325 (width/2L),image->columns+width,width,exception);
4326 q=QueueCacheViewAuthenticPixels(noise_view,0,y,noise_image->columns,1,
4328 if ((p == (const PixelPacket *) NULL) || (q == (PixelPacket *) NULL))
4333 indexes=GetCacheViewVirtualIndexQueue(image_view);
4334 noise_indexes=GetCacheViewAuthenticIndexQueue(noise_view);
4335 for (x=0; x < (ssize_t) noise_image->columns; x++)
4340 register const PixelPacket
4343 register const IndexPacket
4352 ResetMedianPixelList(pixel_list[id]);
4353 for (v=0; v < (ssize_t) width; v++)
4355 for (u=0; u < (ssize_t) width; u++)
4356 InsertMedianPixelList(image,r+u,s+u,pixel_list[id]);
4357 r+=image->columns+width;
4358 s+=image->columns+width;
4360 pixel=GetNonpeakMedianPixelList(pixel_list[id]);
4361 SetPixelPacket(noise_image,&pixel,q,noise_indexes+x);
4365 if (SyncCacheViewAuthenticPixels(noise_view,exception) == MagickFalse)
4367 if (image->progress_monitor != (MagickProgressMonitor) NULL)
4372 #if defined(MAGICKCORE_OPENMP_SUPPORT)
4373 #pragma omp critical (MagickCore_ReduceNoiseImage)
4375 proceed=SetImageProgress(image,ReduceNoiseImageTag,progress++,
4377 if (proceed == MagickFalse)
4381 noise_view=DestroyCacheView(noise_view);
4382 image_view=DestroyCacheView(image_view);
4383 pixel_list=DestroyMedianPixelListThreadSet(pixel_list);
4384 return(noise_image);
4388 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4392 % S e l e c t i v e B l u r I m a g e %
4396 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4398 % SelectiveBlurImage() selectively blur pixels within a contrast threshold.
4399 % It is similar to the unsharpen mask that sharpens everything with contrast
4400 % above a certain threshold.
4402 % The format of the SelectiveBlurImage method is:
4404 % Image *SelectiveBlurImage(const Image *image,const double radius,
4405 % const double sigma,const double threshold,ExceptionInfo *exception)
4406 % Image *SelectiveBlurImageChannel(const Image *image,
4407 % const ChannelType channel,const double radius,const double sigma,
4408 % const double threshold,ExceptionInfo *exception)
4410 % A description of each parameter follows:
4412 % o image: the image.
4414 % o channel: the channel type.
4416 % o radius: the radius of the Gaussian, in pixels, not counting the center
4419 % o sigma: the standard deviation of the Gaussian, in pixels.
4421 % o threshold: only pixels within this contrast threshold are included
4422 % in the blur operation.
4424 % o exception: return any errors or warnings in this structure.
4428 static inline MagickBooleanType SelectiveContrast(const PixelPacket *p,
4429 const PixelPacket *q,const double threshold)
4431 if (fabs(PixelIntensity(p)-PixelIntensity(q)) < threshold)
4433 return(MagickFalse);
4436 MagickExport Image *SelectiveBlurImage(const Image *image,const double radius,
4437 const double sigma,const double threshold,ExceptionInfo *exception)
4442 blur_image=SelectiveBlurImageChannel(image,DefaultChannels,radius,sigma,
4443 threshold,exception);
4447 MagickExport Image *SelectiveBlurImageChannel(const Image *image,
4448 const ChannelType channel,const double radius,const double sigma,
4449 const double threshold,ExceptionInfo *exception)
4451 #define SelectiveBlurImageTag "SelectiveBlur/Image"
4485 Initialize blur image attributes.
4487 assert(image != (Image *) NULL);
4488 assert(image->signature == MagickSignature);
4489 if (image->debug != MagickFalse)
4490 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
4491 assert(exception != (ExceptionInfo *) NULL);
4492 assert(exception->signature == MagickSignature);
4493 width=GetOptimalKernelWidth1D(radius,sigma);
4494 kernel=(double *) AcquireQuantumMemory((size_t) width,width*sizeof(*kernel));
4495 if (kernel == (double *) NULL)
4496 ThrowImageException(ResourceLimitError,"MemoryAllocationFailed");
4497 j=(ssize_t) width/2;
4499 for (v=(-j); v <= j; v++)
4501 for (u=(-j); u <= j; u++)
4502 kernel[i++]=(double) (exp(-((double) u*u+v*v)/(2.0*MagickSigma*
4503 MagickSigma))/(2.0*MagickPI*MagickSigma*MagickSigma));
4505 if (image->debug != MagickFalse)
4508 format[MaxTextExtent],
4511 register const double
4518 (void) LogMagickEvent(TransformEvent,GetMagickModule(),
4519 " SelectiveBlurImage with %.20gx%.20g kernel:",(double) width,(double)
4521 message=AcquireString("");
4523 for (v=0; v < (ssize_t) width; v++)
4526 (void) FormatMagickString(format,MaxTextExtent,"%.20g: ",(double) v);
4527 (void) ConcatenateString(&message,format);
4528 for (u=0; u < (ssize_t) width; u++)
4530 (void) FormatMagickString(format,MaxTextExtent,"%+f ",*k++);
4531 (void) ConcatenateString(&message,format);
4533 (void) LogMagickEvent(TransformEvent,GetMagickModule(),"%s",message);
4535 message=DestroyString(message);
4537 blur_image=CloneImage(image,0,0,MagickTrue,exception);
4538 if (blur_image == (Image *) NULL)
4539 return((Image *) NULL);
4540 if (SetImageStorageClass(blur_image,DirectClass) == MagickFalse)
4542 InheritException(exception,&blur_image->exception);
4543 blur_image=DestroyImage(blur_image);
4544 return((Image *) NULL);
4547 Threshold blur image.
4551 GetMagickPixelPacket(image,&bias);
4552 SetMagickPixelPacketBias(image,&bias);
4553 image_view=AcquireCacheView(image);
4554 blur_view=AcquireCacheView(blur_image);
4555 #if defined(MAGICKCORE_OPENMP_SUPPORT)
4556 #pragma omp parallel for schedule(dynamic,4) shared(progress,status)
4558 for (y=0; y < (ssize_t) image->rows; y++)
4566 register const IndexPacket
4569 register const PixelPacket
4572 register IndexPacket
4573 *restrict blur_indexes;
4575 register PixelPacket
4581 if (status == MagickFalse)
4583 p=GetCacheViewVirtualPixels(image_view,-((ssize_t) width/2L),y-(ssize_t)
4584 (width/2L),image->columns+width,width,exception);
4585 q=GetCacheViewAuthenticPixels(blur_view,0,y,blur_image->columns,1,
4587 if ((p == (const PixelPacket *) NULL) || (q == (PixelPacket *) NULL))
4592 indexes=GetCacheViewVirtualIndexQueue(image_view);
4593 blur_indexes=GetCacheViewAuthenticIndexQueue(blur_view);
4594 for (x=0; x < (ssize_t) image->columns; x++)
4599 register const double
4613 if (((channel & OpacityChannel) == 0) || (image->matte == MagickFalse))
4615 for (v=0; v < (ssize_t) width; v++)
4617 for (u=0; u < (ssize_t) width; u++)
4619 if (SelectiveContrast(p+u+j,q,threshold) != MagickFalse)
4621 pixel.red+=(*k)*(p+u+j)->red;
4622 pixel.green+=(*k)*(p+u+j)->green;
4623 pixel.blue+=(*k)*(p+u+j)->blue;
4628 j+=(ssize_t) (image->columns+width);
4632 gamma=1.0/(fabs((double) gamma) <= MagickEpsilon ? 1.0 : gamma);
4633 if ((channel & RedChannel) != 0)
4634 q->red=ClampToQuantum(gamma*GetRedPixelComponent(&pixel));
4635 if ((channel & GreenChannel) != 0)
4636 q->green=ClampToQuantum(gamma*GetGreenPixelComponent(&pixel));
4637 if ((channel & BlueChannel) != 0)
4638 q->blue=ClampToQuantum(gamma*GetBluePixelComponent(&pixel));
4640 if ((channel & OpacityChannel) != 0)
4644 for (v=0; v < (ssize_t) width; v++)
4646 for (u=0; u < (ssize_t) width; u++)
4648 if (SelectiveContrast(p+u+j,q,threshold) != MagickFalse)
4650 pixel.opacity+=(*k)*(p+u+j)->opacity;
4655 j+=(ssize_t) (image->columns+width);
4659 gamma=1.0/(fabs((double) gamma) <= MagickEpsilon ? 1.0 :
4661 SetOpacityPixelComponent(q,ClampToQuantum(gamma*
4662 GetOpacityPixelComponent(&pixel)));
4665 if (((channel & IndexChannel) != 0) &&
4666 (image->colorspace == CMYKColorspace))
4670 for (v=0; v < (ssize_t) width; v++)
4672 for (u=0; u < (ssize_t) width; u++)
4674 if (SelectiveContrast(p+u+j,q,threshold) != MagickFalse)
4676 pixel.index+=(*k)*indexes[x+u+j];
4681 j+=(ssize_t) (image->columns+width);
4685 gamma=1.0/(fabs((double) gamma) <= MagickEpsilon ? 1.0 :
4687 blur_indexes[x]=ClampToQuantum(gamma*
4688 GetIndexPixelComponent(&pixel));
4697 for (v=0; v < (ssize_t) width; v++)
4699 for (u=0; u < (ssize_t) width; u++)
4701 if (SelectiveContrast(p+u+j,q,threshold) != MagickFalse)
4703 alpha=(MagickRealType) (QuantumScale*
4704 GetAlphaPixelComponent(p+u+j));
4705 pixel.red+=(*k)*alpha*(p+u+j)->red;
4706 pixel.green+=(*k)*alpha*(p+u+j)->green;
4707 pixel.blue+=(*k)*alpha*(p+u+j)->blue;
4708 pixel.opacity+=(*k)*(p+u+j)->opacity;
4713 j+=(ssize_t) (image->columns+width);
4717 gamma=1.0/(fabs((double) gamma) <= MagickEpsilon ? 1.0 : gamma);
4718 if ((channel & RedChannel) != 0)
4719 q->red=ClampToQuantum(gamma*GetRedPixelComponent(&pixel));
4720 if ((channel & GreenChannel) != 0)
4721 q->green=ClampToQuantum(gamma*GetGreenPixelComponent(&pixel));
4722 if ((channel & BlueChannel) != 0)
4723 q->blue=ClampToQuantum(gamma*GetBluePixelComponent(&pixel));
4725 if ((channel & OpacityChannel) != 0)
4729 for (v=0; v < (ssize_t) width; v++)
4731 for (u=0; u < (ssize_t) width; u++)
4733 if (SelectiveContrast(p+u+j,q,threshold) != MagickFalse)
4735 pixel.opacity+=(*k)*(p+u+j)->opacity;
4740 j+=(ssize_t) (image->columns+width);
4744 gamma=1.0/(fabs((double) gamma) <= MagickEpsilon ? 1.0 :
4746 SetOpacityPixelComponent(q,
4747 ClampOpacityPixelComponent(&pixel));
4750 if (((channel & IndexChannel) != 0) &&
4751 (image->colorspace == CMYKColorspace))
4755 for (v=0; v < (ssize_t) width; v++)
4757 for (u=0; u < (ssize_t) width; u++)
4759 if (SelectiveContrast(p+u+j,q,threshold) != MagickFalse)
4761 alpha=(MagickRealType) (QuantumScale*
4762 GetAlphaPixelComponent(p+u+j));
4763 pixel.index+=(*k)*alpha*indexes[x+u+j];
4768 j+=(ssize_t) (image->columns+width);
4772 gamma=1.0/(fabs((double) gamma) <= MagickEpsilon ? 1.0 :
4774 blur_indexes[x]=ClampToQuantum(gamma*
4775 GetIndexPixelComponent(&pixel));
4782 sync=SyncCacheViewAuthenticPixels(blur_view,exception);
4783 if (sync == MagickFalse)
4785 if (image->progress_monitor != (MagickProgressMonitor) NULL)
4790 #if defined(MAGICKCORE_OPENMP_SUPPORT)
4791 #pragma omp critical (MagickCore_SelectiveBlurImageChannel)
4793 proceed=SetImageProgress(image,SelectiveBlurImageTag,progress++,
4795 if (proceed == MagickFalse)
4799 blur_image->type=image->type;
4800 blur_view=DestroyCacheView(blur_view);
4801 image_view=DestroyCacheView(image_view);
4802 kernel=(double *) RelinquishMagickMemory(kernel);
4803 if (status == MagickFalse)
4804 blur_image=DestroyImage(blur_image);
4809 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4813 % S h a d e I m a g e %
4817 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4819 % ShadeImage() shines a distant light on an image to create a
4820 % three-dimensional effect. You control the positioning of the light with
4821 % azimuth and elevation; azimuth is measured in degrees off the x axis
4822 % and elevation is measured in pixels above the Z axis.
4824 % The format of the ShadeImage method is:
4826 % Image *ShadeImage(const Image *image,const MagickBooleanType gray,
4827 % const double azimuth,const double elevation,ExceptionInfo *exception)
4829 % A description of each parameter follows:
4831 % o image: the image.
4833 % o gray: A value other than zero shades the intensity of each pixel.
4835 % o azimuth, elevation: Define the light source direction.
4837 % o exception: return any errors or warnings in this structure.
4840 MagickExport Image *ShadeImage(const Image *image,const MagickBooleanType gray,
4841 const double azimuth,const double elevation,ExceptionInfo *exception)
4843 #define ShadeImageTag "Shade/Image"
4865 Initialize shaded image attributes.
4867 assert(image != (const Image *) NULL);
4868 assert(image->signature == MagickSignature);
4869 if (image->debug != MagickFalse)
4870 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
4871 assert(exception != (ExceptionInfo *) NULL);
4872 assert(exception->signature == MagickSignature);
4873 shade_image=CloneImage(image,image->columns,image->rows,MagickTrue,exception);
4874 if (shade_image == (Image *) NULL)
4875 return((Image *) NULL);
4876 if (SetImageStorageClass(shade_image,DirectClass) == MagickFalse)
4878 InheritException(exception,&shade_image->exception);
4879 shade_image=DestroyImage(shade_image);
4880 return((Image *) NULL);
4883 Compute the light vector.
4885 light.x=(double) QuantumRange*cos(DegreesToRadians(azimuth))*
4886 cos(DegreesToRadians(elevation));
4887 light.y=(double) QuantumRange*sin(DegreesToRadians(azimuth))*
4888 cos(DegreesToRadians(elevation));
4889 light.z=(double) QuantumRange*sin(DegreesToRadians(elevation));
4895 image_view=AcquireCacheView(image);
4896 shade_view=AcquireCacheView(shade_image);
4897 #if defined(MAGICKCORE_OPENMP_SUPPORT)
4898 #pragma omp parallel for schedule(dynamic,4) shared(progress,status)
4900 for (y=0; y < (ssize_t) image->rows; y++)
4910 register const PixelPacket
4916 register PixelPacket
4922 if (status == MagickFalse)
4924 p=GetCacheViewVirtualPixels(image_view,-1,y-1,image->columns+2,3,exception);
4925 q=QueueCacheViewAuthenticPixels(shade_view,0,y,shade_image->columns,1,
4927 if ((p == (PixelPacket *) NULL) || (q == (PixelPacket *) NULL))
4933 Shade this row of pixels.
4935 normal.z=2.0*(double) QuantumRange; /* constant Z of surface normal */
4937 s1=s0+image->columns+2;
4938 s2=s1+image->columns+2;
4939 for (x=0; x < (ssize_t) image->columns; x++)
4942 Determine the surface normal and compute shading.
4944 normal.x=(double) (PixelIntensity(s0-1)+PixelIntensity(s1-1)+
4945 PixelIntensity(s2-1)-PixelIntensity(s0+1)-PixelIntensity(s1+1)-
4946 PixelIntensity(s2+1));
4947 normal.y=(double) (PixelIntensity(s2-1)+PixelIntensity(s2)+
4948 PixelIntensity(s2+1)-PixelIntensity(s0-1)-PixelIntensity(s0)-
4949 PixelIntensity(s0+1));
4950 if ((normal.x == 0.0) && (normal.y == 0.0))
4955 distance=normal.x*light.x+normal.y*light.y+normal.z*light.z;
4956 if (distance > MagickEpsilon)
4959 normal.x*normal.x+normal.y*normal.y+normal.z*normal.z;
4960 if (normal_distance > (MagickEpsilon*MagickEpsilon))
4961 shade=distance/sqrt((double) normal_distance);
4964 if (gray != MagickFalse)
4966 q->red=(Quantum) shade;
4967 q->green=(Quantum) shade;
4968 q->blue=(Quantum) shade;
4972 q->red=ClampToQuantum(QuantumScale*shade*s1->red);
4973 q->green=ClampToQuantum(QuantumScale*shade*s1->green);
4974 q->blue=ClampToQuantum(QuantumScale*shade*s1->blue);
4976 q->opacity=s1->opacity;
4982 if (SyncCacheViewAuthenticPixels(shade_view,exception) == MagickFalse)
4984 if (image->progress_monitor != (MagickProgressMonitor) NULL)
4989 #if defined(MAGICKCORE_OPENMP_SUPPORT)
4990 #pragma omp critical (MagickCore_ShadeImage)
4992 proceed=SetImageProgress(image,ShadeImageTag,progress++,image->rows);
4993 if (proceed == MagickFalse)
4997 shade_view=DestroyCacheView(shade_view);
4998 image_view=DestroyCacheView(image_view);
4999 if (status == MagickFalse)
5000 shade_image=DestroyImage(shade_image);
5001 return(shade_image);
5005 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
5009 % S h a r p e n I m a g e %
5013 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
5015 % SharpenImage() sharpens the image. We convolve the image with a Gaussian
5016 % operator of the given radius and standard deviation (sigma). For
5017 % reasonable results, radius should be larger than sigma. Use a radius of 0
5018 % and SharpenImage() selects a suitable radius for you.
5020 % Using a separable kernel would be faster, but the negative weights cancel
5021 % out on the corners of the kernel producing often undesirable ringing in the
5022 % filtered result; this can be avoided by using a 2D gaussian shaped image
5023 % sharpening kernel instead.
5025 % The format of the SharpenImage method is:
5027 % Image *SharpenImage(const Image *image,const double radius,
5028 % const double sigma,ExceptionInfo *exception)
5029 % Image *SharpenImageChannel(const Image *image,const ChannelType channel,
5030 % const double radius,const double sigma,ExceptionInfo *exception)
5032 % A description of each parameter follows:
5034 % o image: the image.
5036 % o channel: the channel type.
5038 % o radius: the radius of the Gaussian, in pixels, not counting the center
5041 % o sigma: the standard deviation of the Laplacian, in pixels.
5043 % o exception: return any errors or warnings in this structure.
5047 MagickExport Image *SharpenImage(const Image *image,const double radius,
5048 const double sigma,ExceptionInfo *exception)
5053 sharp_image=SharpenImageChannel(image,DefaultChannels,radius,sigma,exception);
5054 return(sharp_image);
5057 MagickExport Image *SharpenImageChannel(const Image *image,
5058 const ChannelType channel,const double radius,const double sigma,
5059 ExceptionInfo *exception)
5079 assert(image != (const Image *) NULL);
5080 assert(image->signature == MagickSignature);
5081 if (image->debug != MagickFalse)
5082 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
5083 assert(exception != (ExceptionInfo *) NULL);
5084 assert(exception->signature == MagickSignature);
5085 width=GetOptimalKernelWidth2D(radius,sigma);
5086 kernel=(double *) AcquireQuantumMemory((size_t) width*width,sizeof(*kernel));
5087 if (kernel == (double *) NULL)
5088 ThrowImageException(ResourceLimitError,"MemoryAllocationFailed");
5090 j=(ssize_t) width/2;
5092 for (v=(-j); v <= j; v++)
5094 for (u=(-j); u <= j; u++)
5096 kernel[i]=(double) (-exp(-((double) u*u+v*v)/(2.0*MagickSigma*
5097 MagickSigma))/(2.0*MagickPI*MagickSigma*MagickSigma));
5098 normalize+=kernel[i];
5102 kernel[i/2]=(double) ((-2.0)*normalize);
5103 sharp_image=ConvolveImageChannel(image,channel,width,kernel,exception);
5104 kernel=(double *) RelinquishMagickMemory(kernel);
5105 return(sharp_image);
5109 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
5113 % S p r e a d I m a g e %
5117 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
5119 % SpreadImage() is a special effects method that randomly displaces each
5120 % pixel in a block defined by the radius parameter.
5122 % The format of the SpreadImage method is:
5124 % Image *SpreadImage(const Image *image,const double radius,
5125 % ExceptionInfo *exception)
5127 % A description of each parameter follows:
5129 % o image: the image.
5131 % o radius: Choose a random pixel in a neighborhood of this extent.
5133 % o exception: return any errors or warnings in this structure.
5136 MagickExport Image *SpreadImage(const Image *image,const double radius,
5137 ExceptionInfo *exception)
5139 #define SpreadImageTag "Spread/Image"
5157 **restrict random_info;
5160 **restrict resample_filter;
5169 Initialize spread image attributes.
5171 assert(image != (Image *) NULL);
5172 assert(image->signature == MagickSignature);
5173 if (image->debug != MagickFalse)
5174 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
5175 assert(exception != (ExceptionInfo *) NULL);
5176 assert(exception->signature == MagickSignature);
5177 spread_image=CloneImage(image,image->columns,image->rows,MagickTrue,
5179 if (spread_image == (Image *) NULL)
5180 return((Image *) NULL);
5181 if (SetImageStorageClass(spread_image,DirectClass) == MagickFalse)
5183 InheritException(exception,&spread_image->exception);
5184 spread_image=DestroyImage(spread_image);
5185 return((Image *) NULL);
5192 GetMagickPixelPacket(spread_image,&bias);
5193 width=GetOptimalKernelWidth1D(radius,0.5);
5194 resample_filter=AcquireResampleFilterThreadSet(image,
5195 UndefinedVirtualPixelMethod,MagickTrue,exception);
5196 random_info=AcquireRandomInfoThreadSet();
5197 image_view=AcquireCacheView(spread_image);
5198 #if defined(MAGICKCORE_OPENMP_SUPPORT)
5199 #pragma omp parallel for schedule(dynamic,4) shared(progress,status)
5201 for (y=0; y < (ssize_t) spread_image->rows; y++)
5204 id = GetOpenMPThreadId();
5209 register IndexPacket
5212 register PixelPacket
5218 if (status == MagickFalse)
5220 q=QueueCacheViewAuthenticPixels(image_view,0,y,spread_image->columns,1,
5222 if (q == (PixelPacket *) NULL)
5227 indexes=GetCacheViewAuthenticIndexQueue(image_view);
5229 for (x=0; x < (ssize_t) spread_image->columns; x++)
5231 (void) ResamplePixelColor(resample_filter[id],(double) x+width*
5232 (GetPseudoRandomValue(random_info[id])-0.5),(double) y+width*
5233 (GetPseudoRandomValue(random_info[id])-0.5),&pixel);
5234 SetPixelPacket(spread_image,&pixel,q,indexes+x);
5237 if (SyncCacheViewAuthenticPixels(image_view,exception) == MagickFalse)
5239 if (image->progress_monitor != (MagickProgressMonitor) NULL)
5244 #if defined(MAGICKCORE_OPENMP_SUPPORT)
5245 #pragma omp critical (MagickCore_SpreadImage)
5247 proceed=SetImageProgress(image,SpreadImageTag,progress++,image->rows);
5248 if (proceed == MagickFalse)
5252 image_view=DestroyCacheView(image_view);
5253 random_info=DestroyRandomInfoThreadSet(random_info);
5254 resample_filter=DestroyResampleFilterThreadSet(resample_filter);
5255 return(spread_image);
5259 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
5263 % U n s h a r p M a s k I m a g e %
5267 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
5269 % UnsharpMaskImage() sharpens one or more image channels. We convolve the
5270 % image with a Gaussian operator of the given radius and standard deviation
5271 % (sigma). For reasonable results, radius should be larger than sigma. Use a
5272 % radius of 0 and UnsharpMaskImage() selects a suitable radius for you.
5274 % The format of the UnsharpMaskImage method is:
5276 % Image *UnsharpMaskImage(const Image *image,const double radius,
5277 % const double sigma,const double amount,const double threshold,
5278 % ExceptionInfo *exception)
5279 % Image *UnsharpMaskImageChannel(const Image *image,
5280 % const ChannelType channel,const double radius,const double sigma,
5281 % const double amount,const double threshold,ExceptionInfo *exception)
5283 % A description of each parameter follows:
5285 % o image: the image.
5287 % o channel: the channel type.
5289 % o radius: the radius of the Gaussian, in pixels, not counting the center
5292 % o sigma: the standard deviation of the Gaussian, in pixels.
5294 % o amount: the percentage of the difference between the original and the
5295 % blur image that is added back into the original.
5297 % o threshold: the threshold in pixels needed to apply the diffence amount.
5299 % o exception: return any errors or warnings in this structure.
5303 MagickExport Image *UnsharpMaskImage(const Image *image,const double radius,
5304 const double sigma,const double amount,const double threshold,
5305 ExceptionInfo *exception)
5310 sharp_image=UnsharpMaskImageChannel(image,DefaultChannels,radius,sigma,amount,
5311 threshold,exception);
5312 return(sharp_image);
5315 MagickExport Image *UnsharpMaskImageChannel(const Image *image,
5316 const ChannelType channel,const double radius,const double sigma,
5317 const double amount,const double threshold,ExceptionInfo *exception)
5319 #define SharpenImageTag "Sharpen/Image"
5343 assert(image != (const Image *) NULL);
5344 assert(image->signature == MagickSignature);
5345 if (image->debug != MagickFalse)
5346 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
5347 assert(exception != (ExceptionInfo *) NULL);
5348 unsharp_image=BlurImageChannel(image,channel,radius,sigma,exception);
5349 if (unsharp_image == (Image *) NULL)
5350 return((Image *) NULL);
5351 quantum_threshold=(MagickRealType) QuantumRange*threshold;
5357 GetMagickPixelPacket(image,&bias);
5358 image_view=AcquireCacheView(image);
5359 unsharp_view=AcquireCacheView(unsharp_image);
5360 #if defined(MAGICKCORE_OPENMP_SUPPORT)
5361 #pragma omp parallel for schedule(dynamic,4) shared(progress,status)
5363 for (y=0; y < (ssize_t) image->rows; y++)
5368 register const IndexPacket
5371 register const PixelPacket
5374 register IndexPacket
5375 *restrict unsharp_indexes;
5377 register PixelPacket
5383 if (status == MagickFalse)
5385 p=GetCacheViewVirtualPixels(image_view,0,y,image->columns,1,exception);
5386 q=GetCacheViewAuthenticPixels(unsharp_view,0,y,unsharp_image->columns,1,
5388 if ((p == (const PixelPacket *) NULL) || (q == (PixelPacket *) NULL))
5393 indexes=GetCacheViewVirtualIndexQueue(image_view);
5394 unsharp_indexes=GetCacheViewAuthenticIndexQueue(unsharp_view);
5396 for (x=0; x < (ssize_t) image->columns; x++)
5398 if ((channel & RedChannel) != 0)
5400 pixel.red=p->red-(MagickRealType) q->red;
5401 if (fabs(2.0*pixel.red) < quantum_threshold)
5402 pixel.red=(MagickRealType) GetRedPixelComponent(p);
5404 pixel.red=(MagickRealType) p->red+(pixel.red*amount);
5405 SetRedPixelComponent(q,ClampRedPixelComponent(&pixel));
5407 if ((channel & GreenChannel) != 0)
5409 pixel.green=p->green-(MagickRealType) q->green;
5410 if (fabs(2.0*pixel.green) < quantum_threshold)
5411 pixel.green=(MagickRealType) GetGreenPixelComponent(p);
5413 pixel.green=(MagickRealType) p->green+(pixel.green*amount);
5414 SetGreenPixelComponent(q,ClampGreenPixelComponent(&pixel));
5416 if ((channel & BlueChannel) != 0)
5418 pixel.blue=p->blue-(MagickRealType) q->blue;
5419 if (fabs(2.0*pixel.blue) < quantum_threshold)
5420 pixel.blue=(MagickRealType) GetBluePixelComponent(p);
5422 pixel.blue=(MagickRealType) p->blue+(pixel.blue*amount);
5423 SetBluePixelComponent(q,ClampBluePixelComponent(&pixel));
5425 if ((channel & OpacityChannel) != 0)
5427 pixel.opacity=p->opacity-(MagickRealType) q->opacity;
5428 if (fabs(2.0*pixel.opacity) < quantum_threshold)
5429 pixel.opacity=(MagickRealType) GetOpacityPixelComponent(p);
5431 pixel.opacity=p->opacity+(pixel.opacity*amount);
5432 SetOpacityPixelComponent(q,ClampOpacityPixelComponent(&pixel));
5434 if (((channel & IndexChannel) != 0) &&
5435 (image->colorspace == CMYKColorspace))
5437 pixel.index=unsharp_indexes[x]-(MagickRealType) indexes[x];
5438 if (fabs(2.0*pixel.index) < quantum_threshold)
5439 pixel.index=(MagickRealType) unsharp_indexes[x];
5441 pixel.index=(MagickRealType) unsharp_indexes[x]+(pixel.index*
5443 unsharp_indexes[x]=ClampToQuantum(pixel.index);
5448 if (SyncCacheViewAuthenticPixels(unsharp_view,exception) == MagickFalse)
5450 if (image->progress_monitor != (MagickProgressMonitor) NULL)
5455 #if defined(MAGICKCORE_OPENMP_SUPPORT)
5456 #pragma omp critical (MagickCore_UnsharpMaskImageChannel)
5458 proceed=SetImageProgress(image,SharpenImageTag,progress++,image->rows);
5459 if (proceed == MagickFalse)
5463 unsharp_image->type=image->type;
5464 unsharp_view=DestroyCacheView(unsharp_view);
5465 image_view=DestroyCacheView(image_view);
5466 if (status == MagickFalse)
5467 unsharp_image=DestroyImage(unsharp_image);
5468 return(unsharp_image);