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 1999-2011 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 "MagickCore/studio.h"
44 #include "MagickCore/accelerate.h"
45 #include "MagickCore/blob.h"
46 #include "MagickCore/cache-view.h"
47 #include "MagickCore/color.h"
48 #include "MagickCore/color-private.h"
49 #include "MagickCore/colorspace.h"
50 #include "MagickCore/constitute.h"
51 #include "MagickCore/decorate.h"
52 #include "MagickCore/distort.h"
53 #include "MagickCore/draw.h"
54 #include "MagickCore/enhance.h"
55 #include "MagickCore/exception.h"
56 #include "MagickCore/exception-private.h"
57 #include "MagickCore/effect.h"
58 #include "MagickCore/fx.h"
59 #include "MagickCore/gem.h"
60 #include "MagickCore/gem-private.h"
61 #include "MagickCore/geometry.h"
62 #include "MagickCore/image-private.h"
63 #include "MagickCore/list.h"
64 #include "MagickCore/log.h"
65 #include "MagickCore/memory_.h"
66 #include "MagickCore/monitor.h"
67 #include "MagickCore/monitor-private.h"
68 #include "MagickCore/montage.h"
69 #include "MagickCore/morphology.h"
70 #include "MagickCore/paint.h"
71 #include "MagickCore/pixel-accessor.h"
72 #include "MagickCore/property.h"
73 #include "MagickCore/quantize.h"
74 #include "MagickCore/quantum.h"
75 #include "MagickCore/quantum-private.h"
76 #include "MagickCore/random_.h"
77 #include "MagickCore/random-private.h"
78 #include "MagickCore/resample.h"
79 #include "MagickCore/resample-private.h"
80 #include "MagickCore/resize.h"
81 #include "MagickCore/resource_.h"
82 #include "MagickCore/segment.h"
83 #include "MagickCore/shear.h"
84 #include "MagickCore/signature-private.h"
85 #include "MagickCore/statistic.h"
86 #include "MagickCore/string_.h"
87 #include "MagickCore/thread-private.h"
88 #include "MagickCore/transform.h"
89 #include "MagickCore/threshold.h"
92 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
96 % A d a p t i v e B l u r I m a g e %
100 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
102 % AdaptiveBlurImage() adaptively blurs the image by blurring less
103 % intensely near image edges and more intensely far from edges. We blur the
104 % image with a Gaussian operator of the given radius and standard deviation
105 % (sigma). For reasonable results, radius should be larger than sigma. Use a
106 % radius of 0 and AdaptiveBlurImage() selects a suitable radius for you.
108 % The format of the AdaptiveBlurImage method is:
110 % Image *AdaptiveBlurImage(const Image *image,const double radius,
111 % const double sigma,const double bias,ExceptionInfo *exception)
113 % A description of each parameter follows:
115 % o image: the image.
117 % o radius: the radius of the Gaussian, in pixels, not counting the center
120 % o sigma: the standard deviation of the Laplacian, in pixels.
124 % o exception: return any errors or warnings in this structure.
128 MagickExport MagickBooleanType AdaptiveLevelImage(Image *image,
129 const char *levels,ExceptionInfo *exception)
148 if (levels == (char *) NULL)
150 flags=ParseGeometry(levels,&geometry_info);
151 black_point=geometry_info.rho;
152 white_point=(double) QuantumRange;
153 if ((flags & SigmaValue) != 0)
154 white_point=geometry_info.sigma;
156 if ((flags & XiValue) != 0)
157 gamma=geometry_info.xi;
158 if ((flags & PercentValue) != 0)
160 black_point*=(double) image->columns*image->rows/100.0;
161 white_point*=(double) image->columns*image->rows/100.0;
163 if ((flags & SigmaValue) == 0)
164 white_point=(double) QuantumRange-black_point;
165 if ((flags & AspectValue ) == 0)
166 status=LevelImage(image,black_point,white_point,gamma,exception);
168 status=LevelizeImage(image,black_point,white_point,gamma,exception);
172 MagickExport Image *AdaptiveBlurImage(const Image *image,const double radius,
173 const double sigma,const double bias,ExceptionInfo *exception)
175 #define AdaptiveBlurImageTag "Convolve/Image"
176 #define MagickSigma (fabs(sigma) <= MagickEpsilon ? 1.0 : sigma)
211 assert(image != (const Image *) NULL);
212 assert(image->signature == MagickSignature);
213 if (image->debug != MagickFalse)
214 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
215 assert(exception != (ExceptionInfo *) NULL);
216 assert(exception->signature == MagickSignature);
217 blur_image=CloneImage(image,image->columns,image->rows,MagickTrue,exception);
218 if (blur_image == (Image *) NULL)
219 return((Image *) NULL);
220 if (fabs(sigma) <= MagickEpsilon)
222 if (SetImageStorageClass(blur_image,DirectClass,exception) == MagickFalse)
224 blur_image=DestroyImage(blur_image);
225 return((Image *) NULL);
228 Edge detect the image brighness channel, level, blur, and level again.
230 edge_image=EdgeImage(image,radius,sigma,exception);
231 if (edge_image == (Image *) NULL)
233 blur_image=DestroyImage(blur_image);
234 return((Image *) NULL);
236 (void) AdaptiveLevelImage(edge_image,"20%,95%",exception);
237 gaussian_image=GaussianBlurImage(edge_image,radius,sigma,bias,exception);
238 if (gaussian_image != (Image *) NULL)
240 edge_image=DestroyImage(edge_image);
241 edge_image=gaussian_image;
243 (void) AdaptiveLevelImage(edge_image,"10%,95%",exception);
245 Create a set of kernels from maximum (radius,sigma) to minimum.
247 width=GetOptimalKernelWidth2D(radius,sigma);
248 kernel=(double **) AcquireQuantumMemory((size_t) width,sizeof(*kernel));
249 if (kernel == (double **) NULL)
251 edge_image=DestroyImage(edge_image);
252 blur_image=DestroyImage(blur_image);
253 ThrowImageException(ResourceLimitError,"MemoryAllocationFailed");
255 (void) ResetMagickMemory(kernel,0,(size_t) width*sizeof(*kernel));
256 for (i=0; i < (ssize_t) width; i+=2)
258 kernel[i]=(double *) AcquireQuantumMemory((size_t) (width-i),(width-i)*
260 if (kernel[i] == (double *) NULL)
263 j=(ssize_t) (width-i)/2;
265 for (v=(-j); v <= j; v++)
267 for (u=(-j); u <= j; u++)
269 kernel[i][k]=(double) (exp(-((double) u*u+v*v)/(2.0*MagickSigma*
270 MagickSigma))/(2.0*MagickPI*MagickSigma*MagickSigma));
271 normalize+=kernel[i][k];
275 if (fabs(normalize) <= MagickEpsilon)
277 normalize=1.0/normalize;
278 for (k=0; k < (j*j); k++)
279 kernel[i][k]=normalize*kernel[i][k];
281 if (i < (ssize_t) width)
283 for (i-=2; i >= 0; i-=2)
284 kernel[i]=(double *) RelinquishMagickMemory(kernel[i]);
285 kernel=(double **) RelinquishMagickMemory(kernel);
286 edge_image=DestroyImage(edge_image);
287 blur_image=DestroyImage(blur_image);
288 ThrowImageException(ResourceLimitError,"MemoryAllocationFailed");
291 Adaptively blur image.
295 image_view=AcquireCacheView(image);
296 edge_view=AcquireCacheView(edge_image);
297 blur_view=AcquireCacheView(blur_image);
298 #if defined(MAGICKCORE_OPENMP_SUPPORT)
299 #pragma omp parallel for schedule(dynamic,4) shared(progress,status)
301 for (y=0; y < (ssize_t) blur_image->rows; y++)
303 register const Quantum
312 if (status == MagickFalse)
314 r=GetCacheViewVirtualPixels(edge_view,0,y,edge_image->columns,1,exception);
315 q=QueueCacheViewAuthenticPixels(blur_view,0,y,blur_image->columns,1,
317 if ((r == (const Quantum *) NULL) || (q == (Quantum *) NULL))
322 for (x=0; x < (ssize_t) blur_image->columns; x++)
324 register const Quantum
334 j=(ssize_t) ceil((double) width*QuantumScale*
335 GetPixelIntensity(edge_image,r)-0.5);
339 if (j > (ssize_t) width)
343 p=GetCacheViewVirtualPixels(image_view,x-((ssize_t) (width-j)/2L),y-
344 (ssize_t) ((width-j)/2L),width-j,width-j,exception);
345 if (p == (const Quantum *) NULL)
347 center=(ssize_t) GetPixelChannels(image)*(width-j)*
348 ((width-j)/2L)+GetPixelChannels(image)*((width-j)/2L);
349 for (i=0; i < (ssize_t) GetPixelChannels(image); i++)
363 register const double
366 register const Quantum
375 channel=GetPixelChannelMapChannel(image,i);
376 traits=GetPixelChannelMapTraits(image,channel);
377 blur_traits=GetPixelChannelMapTraits(blur_image,channel);
378 if ((traits == UndefinedPixelTrait) ||
379 (blur_traits == UndefinedPixelTrait))
381 if ((blur_traits & CopyPixelTrait) != 0)
383 SetPixelChannel(blur_image,channel,p[center+i],q);
390 if ((blur_traits & BlendPixelTrait) == 0)
395 for (v=0; v < (ssize_t) (width-j); v++)
397 for (u=0; u < (ssize_t) (width-j); u++)
399 pixel+=(*k)*pixels[i];
402 pixels+=GetPixelChannels(image);
405 gamma=1.0/(fabs((double) gamma) <= MagickEpsilon ? 1.0 : gamma);
406 SetPixelChannel(blur_image,channel,ClampToQuantum(gamma*pixel),q);
412 for (v=0; v < (ssize_t) (width-j); v++)
414 for (u=0; u < (ssize_t) (width-j); u++)
416 alpha=(MagickRealType) (QuantumScale*GetPixelAlpha(image,pixels));
417 pixel+=(*k)*alpha*pixels[i];
420 pixels+=GetPixelChannels(image);
423 gamma=1.0/(fabs((double) gamma) <= MagickEpsilon ? 1.0 : gamma);
424 SetPixelChannel(blur_image,channel,ClampToQuantum(gamma*pixel),q);
426 q+=GetPixelChannels(blur_image);
427 r+=GetPixelChannels(edge_image);
429 if (SyncCacheViewAuthenticPixels(blur_view,exception) == MagickFalse)
431 if (image->progress_monitor != (MagickProgressMonitor) NULL)
436 #if defined(MAGICKCORE_OPENMP_SUPPORT)
437 #pragma omp critical (MagickCore_AdaptiveBlurImage)
439 proceed=SetImageProgress(image,AdaptiveBlurImageTag,progress++,
441 if (proceed == MagickFalse)
445 blur_image->type=image->type;
446 blur_view=DestroyCacheView(blur_view);
447 edge_view=DestroyCacheView(edge_view);
448 image_view=DestroyCacheView(image_view);
449 edge_image=DestroyImage(edge_image);
450 for (i=0; i < (ssize_t) width; i+=2)
451 kernel[i]=(double *) RelinquishMagickMemory(kernel[i]);
452 kernel=(double **) RelinquishMagickMemory(kernel);
453 if (status == MagickFalse)
454 blur_image=DestroyImage(blur_image);
459 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
463 % A d a p t i v e S h a r p e n I m a g e %
467 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
469 % AdaptiveSharpenImage() adaptively sharpens the image by sharpening more
470 % intensely near image edges and less intensely far from edges. We sharpen the
471 % image with a Gaussian operator of the given radius and standard deviation
472 % (sigma). For reasonable results, radius should be larger than sigma. Use a
473 % radius of 0 and AdaptiveSharpenImage() selects a suitable radius for you.
475 % The format of the AdaptiveSharpenImage method is:
477 % Image *AdaptiveSharpenImage(const Image *image,const double radius,
478 % const double sigma,const double bias,ExceptionInfo *exception)
480 % A description of each parameter follows:
482 % o image: the image.
484 % o radius: the radius of the Gaussian, in pixels, not counting the center
487 % o sigma: the standard deviation of the Laplacian, in pixels.
491 % o exception: return any errors or warnings in this structure.
494 MagickExport Image *AdaptiveSharpenImage(const Image *image,const double radius,
495 const double sigma,const double bias,ExceptionInfo *exception)
497 #define AdaptiveSharpenImageTag "Convolve/Image"
498 #define MagickSigma (fabs(sigma) <= MagickEpsilon ? 1.0 : sigma)
533 assert(image != (const Image *) NULL);
534 assert(image->signature == MagickSignature);
535 if (image->debug != MagickFalse)
536 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
537 assert(exception != (ExceptionInfo *) NULL);
538 assert(exception->signature == MagickSignature);
539 sharp_image=CloneImage(image,0,0,MagickTrue,exception);
540 if (sharp_image == (Image *) NULL)
541 return((Image *) NULL);
542 if (fabs(sigma) <= MagickEpsilon)
544 if (SetImageStorageClass(sharp_image,DirectClass,exception) == MagickFalse)
546 sharp_image=DestroyImage(sharp_image);
547 return((Image *) NULL);
550 Edge detect the image brighness channel, level, sharp, and level again.
552 edge_image=EdgeImage(image,radius,sigma,exception);
553 if (edge_image == (Image *) NULL)
555 sharp_image=DestroyImage(sharp_image);
556 return((Image *) NULL);
558 (void) AdaptiveLevelImage(edge_image,"20%,95%",exception);
559 gaussian_image=GaussianBlurImage(edge_image,radius,sigma,bias,exception);
560 if (gaussian_image != (Image *) NULL)
562 edge_image=DestroyImage(edge_image);
563 edge_image=gaussian_image;
565 (void) AdaptiveLevelImage(edge_image,"10%,95%",exception);
567 Create a set of kernels from maximum (radius,sigma) to minimum.
569 width=GetOptimalKernelWidth2D(radius,sigma);
570 kernel=(double **) AcquireQuantumMemory((size_t) width,sizeof(*kernel));
571 if (kernel == (double **) NULL)
573 edge_image=DestroyImage(edge_image);
574 sharp_image=DestroyImage(sharp_image);
575 ThrowImageException(ResourceLimitError,"MemoryAllocationFailed");
577 (void) ResetMagickMemory(kernel,0,(size_t) width*sizeof(*kernel));
578 for (i=0; i < (ssize_t) width; i+=2)
580 kernel[i]=(double *) AcquireQuantumMemory((size_t) (width-i),(width-i)*
582 if (kernel[i] == (double *) NULL)
585 j=(ssize_t) (width-i)/2;
587 for (v=(-j); v <= j; v++)
589 for (u=(-j); u <= j; u++)
591 kernel[i][k]=(double) (-exp(-((double) u*u+v*v)/(2.0*MagickSigma*
592 MagickSigma))/(2.0*MagickPI*MagickSigma*MagickSigma));
593 normalize+=kernel[i][k];
597 if (fabs(normalize) <= MagickEpsilon)
599 normalize=1.0/normalize;
600 for (k=0; k < (j*j); k++)
601 kernel[i][k]=normalize*kernel[i][k];
603 if (i < (ssize_t) width)
605 for (i-=2; i >= 0; i-=2)
606 kernel[i]=(double *) RelinquishMagickMemory(kernel[i]);
607 kernel=(double **) RelinquishMagickMemory(kernel);
608 edge_image=DestroyImage(edge_image);
609 sharp_image=DestroyImage(sharp_image);
610 ThrowImageException(ResourceLimitError,"MemoryAllocationFailed");
613 Adaptively sharpen image.
617 image_view=AcquireCacheView(image);
618 edge_view=AcquireCacheView(edge_image);
619 sharp_view=AcquireCacheView(sharp_image);
620 #if defined(MAGICKCORE_OPENMP_SUPPORT)
621 #pragma omp parallel for schedule(dynamic,4) shared(progress,status)
623 for (y=0; y < (ssize_t) sharp_image->rows; y++)
625 register const Quantum
634 if (status == MagickFalse)
636 r=GetCacheViewVirtualPixels(edge_view,0,y,edge_image->columns,1,exception);
637 q=QueueCacheViewAuthenticPixels(sharp_view,0,y,sharp_image->columns,1,
639 if ((r == (const Quantum *) NULL) || (q == (Quantum *) NULL))
644 for (x=0; x < (ssize_t) sharp_image->columns; x++)
646 register const Quantum
656 j=(ssize_t) ceil((double) width*QuantumScale*
657 GetPixelIntensity(edge_image,r)-0.5);
661 if (j > (ssize_t) width)
665 p=GetCacheViewVirtualPixels(image_view,x-((ssize_t) (width-j)/2L),y-
666 (ssize_t) ((width-j)/2L),width-j,width-j,exception);
667 if (p == (const Quantum *) NULL)
669 center=(ssize_t) GetPixelChannels(image)*(width-j)*
670 ((width-j)/2L)+GetPixelChannels(image)*((width-j)/2);
671 for (i=0; i < (ssize_t) GetPixelChannels(image); i++)
685 register const double
688 register const Quantum
697 channel=GetPixelChannelMapChannel(image,i);
698 traits=GetPixelChannelMapTraits(image,channel);
699 sharp_traits=GetPixelChannelMapTraits(sharp_image,channel);
700 if ((traits == UndefinedPixelTrait) ||
701 (sharp_traits == UndefinedPixelTrait))
703 if ((sharp_traits & CopyPixelTrait) != 0)
705 SetPixelChannel(sharp_image,channel,p[center+i],q);
712 if ((sharp_traits & BlendPixelTrait) == 0)
717 for (v=0; v < (ssize_t) (width-j); v++)
719 for (u=0; u < (ssize_t) (width-j); u++)
721 pixel+=(*k)*pixels[i];
724 pixels+=GetPixelChannels(image);
727 gamma=1.0/(fabs((double) gamma) <= MagickEpsilon ? 1.0 : gamma);
728 SetPixelChannel(sharp_image,channel,ClampToQuantum(gamma*pixel),q);
734 for (v=0; v < (ssize_t) (width-j); v++)
736 for (u=0; u < (ssize_t) (width-j); u++)
738 alpha=(MagickRealType) (QuantumScale*GetPixelAlpha(image,pixels));
739 pixel+=(*k)*alpha*pixels[i];
742 pixels+=GetPixelChannels(image);
745 gamma=1.0/(fabs((double) gamma) <= MagickEpsilon ? 1.0 : gamma);
746 SetPixelChannel(sharp_image,channel,ClampToQuantum(gamma*pixel),q);
748 q+=GetPixelChannels(sharp_image);
749 r+=GetPixelChannels(edge_image);
751 if (SyncCacheViewAuthenticPixels(sharp_view,exception) == MagickFalse)
753 if (image->progress_monitor != (MagickProgressMonitor) NULL)
758 #if defined(MAGICKCORE_OPENMP_SUPPORT)
759 #pragma omp critical (MagickCore_AdaptiveSharpenImage)
761 proceed=SetImageProgress(image,AdaptiveSharpenImageTag,progress++,
763 if (proceed == MagickFalse)
767 sharp_image->type=image->type;
768 sharp_view=DestroyCacheView(sharp_view);
769 edge_view=DestroyCacheView(edge_view);
770 image_view=DestroyCacheView(image_view);
771 edge_image=DestroyImage(edge_image);
772 for (i=0; i < (ssize_t) width; i+=2)
773 kernel[i]=(double *) RelinquishMagickMemory(kernel[i]);
774 kernel=(double **) RelinquishMagickMemory(kernel);
775 if (status == MagickFalse)
776 sharp_image=DestroyImage(sharp_image);
781 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
785 % B l u r I m a g e %
789 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
791 % BlurImage() blurs an image. We convolve the image with a Gaussian operator
792 % of the given radius and standard deviation (sigma). For reasonable results,
793 % the radius should be larger than sigma. Use a radius of 0 and BlurImage()
794 % selects a suitable radius for you.
796 % BlurImage() differs from GaussianBlurImage() in that it uses a separable
797 % kernel which is faster but mathematically equivalent to the non-separable
800 % The format of the BlurImage method is:
802 % Image *BlurImage(const Image *image,const double radius,
803 % const double sigma,const double bias,ExceptionInfo *exception)
805 % A description of each parameter follows:
807 % o image: the image.
809 % o radius: the radius of the Gaussian, in pixels, not counting the center
812 % o sigma: the standard deviation of the Gaussian, in pixels.
816 % o exception: return any errors or warnings in this structure.
820 static double *GetBlurKernel(const size_t width,const double sigma)
834 Generate a 1-D convolution kernel.
836 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"...");
837 kernel=(double *) AcquireQuantumMemory((size_t) width,sizeof(*kernel));
838 if (kernel == (double *) NULL)
843 for (k=(-j); k <= j; k++)
845 kernel[i]=(double) (exp(-((double) k*k)/(2.0*MagickSigma*MagickSigma))/
846 (MagickSQ2PI*MagickSigma));
847 normalize+=kernel[i];
850 for (i=0; i < (ssize_t) width; i++)
851 kernel[i]/=normalize;
855 MagickExport Image *BlurImage(const Image *image,const double radius,
856 const double sigma,const double bias,ExceptionInfo *exception)
858 #define BlurImageTag "Blur/Image"
888 Initialize blur image attributes.
890 assert(image != (Image *) NULL);
891 assert(image->signature == MagickSignature);
892 if (image->debug != MagickFalse)
893 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
894 assert(exception != (ExceptionInfo *) NULL);
895 assert(exception->signature == MagickSignature);
896 blur_image=CloneImage(image,0,0,MagickTrue,exception);
897 if (blur_image == (Image *) NULL)
898 return((Image *) NULL);
899 if (fabs(sigma) <= MagickEpsilon)
901 if (SetImageStorageClass(blur_image,DirectClass,exception) == MagickFalse)
903 blur_image=DestroyImage(blur_image);
904 return((Image *) NULL);
906 width=GetOptimalKernelWidth1D(radius,sigma);
907 kernel=GetBlurKernel(width,sigma);
908 if (kernel == (double *) NULL)
910 blur_image=DestroyImage(blur_image);
911 ThrowImageException(ResourceLimitError,"MemoryAllocationFailed");
913 if (image->debug != MagickFalse)
916 format[MaxTextExtent],
919 register const double
922 (void) LogMagickEvent(TransformEvent,GetMagickModule(),
923 " BlurImage with %.20g kernel:",(double) width);
924 message=AcquireString("");
926 for (i=0; i < (ssize_t) width; i++)
929 (void) FormatLocaleString(format,MaxTextExtent,"%.20g: ",(double) i);
930 (void) ConcatenateString(&message,format);
931 (void) FormatLocaleString(format,MaxTextExtent,"%g ",*k++);
932 (void) ConcatenateString(&message,format);
933 (void) LogMagickEvent(TransformEvent,GetMagickModule(),"%s",message);
935 message=DestroyString(message);
942 center=(ssize_t) GetPixelChannels(image)*(width/2L);
943 image_view=AcquireCacheView(image);
944 blur_view=AcquireCacheView(blur_image);
945 #if defined(MAGICKCORE_OPENMP_SUPPORT)
946 #pragma omp parallel for schedule(dynamic,4) shared(progress,status)
948 for (y=0; y < (ssize_t) image->rows; y++)
950 register const Quantum
959 if (status == MagickFalse)
961 p=GetCacheViewVirtualPixels(image_view,-((ssize_t) width/2L),y,
962 image->columns+width,1,exception);
963 q=GetCacheViewAuthenticPixels(blur_view,0,y,blur_image->columns,1,
965 if ((p == (const Quantum *) NULL) || (q == (Quantum *) NULL))
970 for (x=0; x < (ssize_t) image->columns; x++)
975 for (i=0; i < (ssize_t) GetPixelChannels(image); i++)
989 register const double
992 register const Quantum
998 channel=GetPixelChannelMapChannel(image,i);
999 traits=GetPixelChannelMapTraits(image,channel);
1000 blur_traits=GetPixelChannelMapTraits(blur_image,channel);
1001 if ((traits == UndefinedPixelTrait) ||
1002 (blur_traits == UndefinedPixelTrait))
1004 if ((blur_traits & CopyPixelTrait) != 0)
1006 SetPixelChannel(blur_image,channel,p[center+i],q);
1012 if ((blur_traits & BlendPixelTrait) == 0)
1017 for (u=0; u < (ssize_t) width; u++)
1019 pixel+=(*k)*pixels[i];
1021 pixels+=GetPixelChannels(image);
1023 SetPixelChannel(blur_image,channel,ClampToQuantum(pixel),q);
1030 for (u=0; u < (ssize_t) width; u++)
1032 alpha=(MagickRealType) (QuantumScale*GetPixelAlpha(image,pixels));
1033 pixel+=(*k)*alpha*pixels[i];
1036 pixels+=GetPixelChannels(image);
1038 gamma=1.0/(fabs((double) gamma) <= MagickEpsilon ? 1.0 : gamma);
1039 SetPixelChannel(blur_image,channel,ClampToQuantum(gamma*pixel),q);
1041 p+=GetPixelChannels(image);
1042 q+=GetPixelChannels(blur_image);
1044 if (SyncCacheViewAuthenticPixels(blur_view,exception) == MagickFalse)
1046 if (image->progress_monitor != (MagickProgressMonitor) NULL)
1051 #if defined(MAGICKCORE_OPENMP_SUPPORT)
1052 #pragma omp critical (MagickCore_BlurImage)
1054 proceed=SetImageProgress(image,BlurImageTag,progress++,blur_image->rows+
1055 blur_image->columns);
1056 if (proceed == MagickFalse)
1060 blur_view=DestroyCacheView(blur_view);
1061 image_view=DestroyCacheView(image_view);
1065 image_view=AcquireCacheView(blur_image);
1066 blur_view=AcquireCacheView(blur_image);
1067 #if defined(MAGICKCORE_OPENMP_SUPPORT)
1068 #pragma omp parallel for schedule(dynamic,4) shared(progress,status)
1070 for (x=0; x < (ssize_t) blur_image->columns; x++)
1072 register const Quantum
1081 if (status == MagickFalse)
1083 p=GetCacheViewVirtualPixels(image_view,x,-((ssize_t) width/2L),1,
1084 blur_image->rows+width,exception);
1085 q=GetCacheViewAuthenticPixels(blur_view,x,0,1,blur_image->rows,exception);
1086 if ((p == (const Quantum *) NULL) || (q == (Quantum *) NULL))
1091 for (y=0; y < (ssize_t) blur_image->rows; y++)
1096 for (i=0; i < (ssize_t) GetPixelChannels(blur_image); i++)
1110 register const double
1113 register const Quantum
1119 channel=GetPixelChannelMapChannel(blur_image,i);
1120 traits=GetPixelChannelMapTraits(blur_image,channel);
1121 blur_traits=GetPixelChannelMapTraits(blur_image,channel);
1122 if ((traits == UndefinedPixelTrait) ||
1123 (blur_traits == UndefinedPixelTrait))
1125 if ((blur_traits & CopyPixelTrait) != 0)
1127 SetPixelChannel(blur_image,channel,p[center+i],q);
1133 if ((blur_traits & BlendPixelTrait) == 0)
1138 for (u=0; u < (ssize_t) width; u++)
1140 pixel+=(*k)*pixels[i];
1142 pixels+=GetPixelChannels(blur_image);
1144 SetPixelChannel(blur_image,channel,ClampToQuantum(pixel),q);
1151 for (u=0; u < (ssize_t) width; u++)
1153 alpha=(MagickRealType) (QuantumScale*GetPixelAlpha(blur_image,
1155 pixel+=(*k)*alpha*pixels[i];
1158 pixels+=GetPixelChannels(blur_image);
1160 gamma=1.0/(fabs((double) gamma) <= MagickEpsilon ? 1.0 : gamma);
1161 SetPixelChannel(blur_image,channel,ClampToQuantum(gamma*pixel),q);
1163 p+=GetPixelChannels(blur_image);
1164 q+=GetPixelChannels(blur_image);
1166 if (SyncCacheViewAuthenticPixels(blur_view,exception) == MagickFalse)
1168 if (blur_image->progress_monitor != (MagickProgressMonitor) NULL)
1173 #if defined(MAGICKCORE_OPENMP_SUPPORT)
1174 #pragma omp critical (MagickCore_BlurImage)
1176 proceed=SetImageProgress(blur_image,BlurImageTag,progress++,
1177 blur_image->rows+blur_image->columns);
1178 if (proceed == MagickFalse)
1182 blur_view=DestroyCacheView(blur_view);
1183 image_view=DestroyCacheView(image_view);
1184 kernel=(double *) RelinquishMagickMemory(kernel);
1185 if (status == MagickFalse)
1186 blur_image=DestroyImage(blur_image);
1187 blur_image->type=image->type;
1192 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1196 % C o n v o l v e I m a g e %
1200 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1202 % ConvolveImage() applies a custom convolution kernel to the image.
1204 % The format of the ConvolveImage method is:
1206 % Image *ConvolveImage(const Image *image,const KernelInfo *kernel,
1207 % ExceptionInfo *exception)
1209 % A description of each parameter follows:
1211 % o image: the image.
1213 % o kernel: the filtering kernel.
1215 % o exception: return any errors or warnings in this structure.
1218 MagickExport Image *ConvolveImage(const Image *image,
1219 const KernelInfo *kernel_info,ExceptionInfo *exception)
1221 #define ConvolveImageTag "Convolve/Image"
1241 Initialize convolve image attributes.
1243 assert(image != (Image *) NULL);
1244 assert(image->signature == MagickSignature);
1245 if (image->debug != MagickFalse)
1246 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
1247 assert(exception != (ExceptionInfo *) NULL);
1248 assert(exception->signature == MagickSignature);
1249 if ((kernel_info->width % 2) == 0)
1250 ThrowImageException(OptionError,"KernelWidthMustBeAnOddNumber");
1251 convolve_image=CloneImage(image,image->columns,image->rows,MagickTrue,
1253 if (convolve_image == (Image *) NULL)
1254 return((Image *) NULL);
1255 if (SetImageStorageClass(convolve_image,DirectClass,exception) == MagickFalse)
1257 convolve_image=DestroyImage(convolve_image);
1258 return((Image *) NULL);
1260 if (image->debug != MagickFalse)
1263 format[MaxTextExtent],
1266 register const double
1275 (void) LogMagickEvent(TransformEvent,GetMagickModule(),
1276 " ConvolveImage with %.20gx%.20g kernel:",(double) kernel_info->width,
1277 (double) kernel_info->height);
1278 message=AcquireString("");
1279 k=kernel_info->values;
1280 for (v=0; v < (ssize_t) kernel_info->width; v++)
1283 (void) FormatLocaleString(format,MaxTextExtent,"%.20g: ",(double) v);
1284 (void) ConcatenateString(&message,format);
1285 for (u=0; u < (ssize_t) kernel_info->height; u++)
1287 (void) FormatLocaleString(format,MaxTextExtent,"%g ",*k++);
1288 (void) ConcatenateString(&message,format);
1290 (void) LogMagickEvent(TransformEvent,GetMagickModule(),"%s",message);
1292 message=DestroyString(message);
1294 status=AccelerateConvolveImage(image,kernel_info,convolve_image,exception);
1295 if (status == MagickTrue)
1296 return(convolve_image);
1300 center=(ssize_t) GetPixelChannels(image)*(image->columns+kernel_info->width)*
1301 (kernel_info->height/2L)+GetPixelChannels(image)*(kernel_info->width/2L);
1304 image_view=AcquireCacheView(image);
1305 convolve_view=AcquireCacheView(convolve_image);
1306 #if defined(MAGICKCORE_OPENMP_SUPPORT)
1307 #pragma omp parallel for schedule(dynamic,4) shared(progress,status)
1309 for (y=0; y < (ssize_t) image->rows; y++)
1311 register const Quantum
1320 if (status == MagickFalse)
1322 p=GetCacheViewVirtualPixels(image_view,-((ssize_t) kernel_info->width/2L),y-
1323 (ssize_t) (kernel_info->height/2L),image->columns+kernel_info->width,
1324 kernel_info->height,exception);
1325 q=QueueCacheViewAuthenticPixels(convolve_view,0,y,convolve_image->columns,1,
1327 if ((p == (const Quantum *) NULL) || (q == (Quantum *) NULL))
1332 for (x=0; x < (ssize_t) image->columns; x++)
1337 for (i=0; i < (ssize_t) GetPixelChannels(image); i++)
1351 register const double
1354 register const Quantum
1363 channel=GetPixelChannelMapChannel(image,i);
1364 traits=GetPixelChannelMapTraits(image,channel);
1365 convolve_traits=GetPixelChannelMapTraits(convolve_image,channel);
1366 if ((traits == UndefinedPixelTrait) ||
1367 (convolve_traits == UndefinedPixelTrait))
1369 if ((convolve_traits & CopyPixelTrait) != 0)
1371 SetPixelChannel(convolve_image,channel,p[center+i],q);
1374 k=kernel_info->values;
1376 pixel=kernel_info->bias;
1377 if ((convolve_traits & BlendPixelTrait) == 0)
1382 for (v=0; v < (ssize_t) kernel_info->height; v++)
1384 for (u=0; u < (ssize_t) kernel_info->width; u++)
1386 pixel+=(*k)*pixels[i];
1388 pixels+=GetPixelChannels(image);
1390 pixels+=image->columns*GetPixelChannels(image);
1392 SetPixelChannel(convolve_image,channel,ClampToQuantum(pixel),q);
1399 for (v=0; v < (ssize_t) kernel_info->height; v++)
1401 for (u=0; u < (ssize_t) kernel_info->width; u++)
1403 alpha=(MagickRealType) (QuantumScale*GetPixelAlpha(image,pixels));
1404 pixel+=(*k)*alpha*pixels[i];
1407 pixels+=GetPixelChannels(image);
1409 pixels+=image->columns*GetPixelChannels(image);
1411 gamma=1.0/(fabs((double) gamma) <= MagickEpsilon ? 1.0 : gamma);
1412 SetPixelChannel(convolve_image,channel,ClampToQuantum(gamma*pixel),q);
1414 p+=GetPixelChannels(image);
1415 q+=GetPixelChannels(convolve_image);
1417 if (SyncCacheViewAuthenticPixels(convolve_view,exception) == MagickFalse)
1419 if (image->progress_monitor != (MagickProgressMonitor) NULL)
1424 #if defined(MAGICKCORE_OPENMP_SUPPORT)
1425 #pragma omp critical (MagickCore_ConvolveImage)
1427 proceed=SetImageProgress(image,ConvolveImageTag,progress++,image->rows);
1428 if (proceed == MagickFalse)
1432 convolve_image->type=image->type;
1433 convolve_view=DestroyCacheView(convolve_view);
1434 image_view=DestroyCacheView(image_view);
1435 if (status == MagickFalse)
1436 convolve_image=DestroyImage(convolve_image);
1437 return(convolve_image);
1441 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1445 % D e s p e c k l e I m a g e %
1449 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1451 % DespeckleImage() reduces the speckle noise in an image while perserving the
1452 % edges of the original image.
1454 % The format of the DespeckleImage method is:
1456 % Image *DespeckleImage(const Image *image,ExceptionInfo *exception)
1458 % A description of each parameter follows:
1460 % o image: the image.
1462 % o exception: return any errors or warnings in this structure.
1466 static void Hull(const ssize_t x_offset,const ssize_t y_offset,
1467 const size_t columns,const size_t rows,Quantum *f,Quantum *g,
1485 assert(f != (Quantum *) NULL);
1486 assert(g != (Quantum *) NULL);
1489 r=p+(y_offset*((ssize_t) columns+2)+x_offset);
1490 for (y=0; y < (ssize_t) rows; y++)
1496 for (x=(ssize_t) columns; x != 0; x--)
1498 v=(MagickRealType) (*p);
1499 if ((MagickRealType) *r >= (v+(MagickRealType) ScaleCharToQuantum(2)))
1500 v+=ScaleCharToQuantum(1);
1507 for (x=(ssize_t) columns; x != 0; x--)
1509 v=(MagickRealType) (*p);
1510 if ((MagickRealType) *r <= (v-(MagickRealType) ScaleCharToQuantum(2)))
1511 v-=(ssize_t) ScaleCharToQuantum(1);
1523 r=q+(y_offset*((ssize_t) columns+2)+x_offset);
1524 s=q-(y_offset*((ssize_t) columns+2)+x_offset);
1525 for (y=0; y < (ssize_t) rows; y++)
1532 for (x=(ssize_t) columns; x != 0; x--)
1534 v=(MagickRealType) (*q);
1535 if (((MagickRealType) *s >=
1536 (v+(MagickRealType) ScaleCharToQuantum(2))) &&
1537 ((MagickRealType) *r > v))
1538 v+=ScaleCharToQuantum(1);
1546 for (x=(ssize_t) columns; x != 0; x--)
1548 v=(MagickRealType) (*q);
1549 if (((MagickRealType) *s <=
1550 (v-(MagickRealType) ScaleCharToQuantum(2))) &&
1551 ((MagickRealType) *r < v))
1552 v-=(MagickRealType) ScaleCharToQuantum(1);
1566 MagickExport Image *DespeckleImage(const Image *image,ExceptionInfo *exception)
1568 #define DespeckleImageTag "Despeckle/Image"
1590 static const ssize_t
1591 X[4] = {0, 1, 1,-1},
1592 Y[4] = {1, 0, 1, 1};
1595 Allocate despeckled image.
1597 assert(image != (const Image *) NULL);
1598 assert(image->signature == MagickSignature);
1599 if (image->debug != MagickFalse)
1600 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
1601 assert(exception != (ExceptionInfo *) NULL);
1602 assert(exception->signature == MagickSignature);
1603 despeckle_image=CloneImage(image,0,0,MagickTrue,exception);
1604 if (despeckle_image == (Image *) NULL)
1605 return((Image *) NULL);
1606 status=SetImageStorageClass(despeckle_image,DirectClass,exception);
1607 if (status == MagickFalse)
1609 despeckle_image=DestroyImage(despeckle_image);
1610 return((Image *) NULL);
1613 Allocate image buffers.
1615 length=(size_t) ((image->columns+2)*(image->rows+2));
1616 pixels=(Quantum *) AcquireQuantumMemory(length,2*sizeof(*pixels));
1617 buffers=(Quantum *) AcquireQuantumMemory(length,2*sizeof(*pixels));
1618 if ((pixels == (Quantum *) NULL) || (buffers == (Quantum *) NULL))
1620 if (buffers != (Quantum *) NULL)
1621 buffers=(Quantum *) RelinquishMagickMemory(buffers);
1622 if (pixels != (Quantum *) NULL)
1623 pixels=(Quantum *) RelinquishMagickMemory(pixels);
1624 despeckle_image=DestroyImage(despeckle_image);
1625 ThrowImageException(ResourceLimitError,"MemoryAllocationFailed");
1628 Reduce speckle in the image.
1631 image_view=AcquireCacheView(image);
1632 despeckle_view=AcquireCacheView(despeckle_image);
1633 for (i=0; i < (ssize_t) GetPixelChannels(image); i++)
1654 if (status == MagickFalse)
1656 channel=GetPixelChannelMapChannel(image,i);
1657 traits=GetPixelChannelMapTraits(image,channel);
1658 despeckle_traits=GetPixelChannelMapTraits(despeckle_image,channel);
1659 if ((traits == UndefinedPixelTrait) ||
1660 (despeckle_traits == UndefinedPixelTrait))
1662 if ((despeckle_traits & CopyPixelTrait) != 0)
1665 (void) ResetMagickMemory(pixel,0,length*sizeof(*pixel));
1667 j=(ssize_t) image->columns+2;
1668 for (y=0; y < (ssize_t) image->rows; y++)
1670 register const Quantum
1673 p=GetCacheViewVirtualPixels(image_view,0,y,image->columns,1,exception);
1674 if (p == (const Quantum *) NULL)
1680 for (x=0; x < (ssize_t) image->columns; x++)
1683 p+=GetPixelChannels(image);
1687 (void) ResetMagickMemory(buffer,0,length*sizeof(*buffer));
1688 for (k=0; k < 4; k++)
1690 Hull(X[k],Y[k],image->columns,image->rows,pixel,buffer,1);
1691 Hull(-X[k],-Y[k],image->columns,image->rows,pixel,buffer,1);
1692 Hull(-X[k],-Y[k],image->columns,image->rows,pixel,buffer,-1);
1693 Hull(X[k],Y[k],image->columns,image->rows,pixel,buffer,-1);
1695 j=(ssize_t) image->columns+2;
1696 for (y=0; y < (ssize_t) image->rows; y++)
1704 q=GetCacheViewAuthenticPixels(despeckle_view,0,y,despeckle_image->columns,
1706 if (q == (Quantum *) NULL)
1712 for (x=0; x < (ssize_t) image->columns; x++)
1714 SetPixelChannel(despeckle_image,channel,pixel[j++],q);
1715 q+=GetPixelChannels(despeckle_image);
1717 sync=SyncCacheViewAuthenticPixels(despeckle_view,exception);
1718 if (sync == MagickFalse)
1722 if (image->progress_monitor != (MagickProgressMonitor) NULL)
1727 proceed=SetImageProgress(image,DespeckleImageTag,(MagickOffsetType) i,
1728 GetPixelChannels(image));
1729 if (proceed == MagickFalse)
1733 despeckle_view=DestroyCacheView(despeckle_view);
1734 image_view=DestroyCacheView(image_view);
1735 buffers=(Quantum *) RelinquishMagickMemory(buffers);
1736 pixels=(Quantum *) RelinquishMagickMemory(pixels);
1737 despeckle_image->type=image->type;
1738 if (status == MagickFalse)
1739 despeckle_image=DestroyImage(despeckle_image);
1740 return(despeckle_image);
1744 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1748 % E d g e I m a g e %
1752 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1754 % EdgeImage() finds edges in an image. Radius defines the radius of the
1755 % convolution filter. Use a radius of 0 and EdgeImage() selects a suitable
1758 % The format of the EdgeImage method is:
1760 % Image *EdgeImage(const Image *image,const double radius,
1761 % const double sigma,ExceptionInfo *exception)
1763 % A description of each parameter follows:
1765 % o image: the image.
1767 % o radius: the radius of the pixel neighborhood.
1769 % o sigma: the standard deviation of the Gaussian, in pixels.
1771 % o exception: return any errors or warnings in this structure.
1774 MagickExport Image *EdgeImage(const Image *image,const double radius,
1775 const double sigma,ExceptionInfo *exception)
1794 assert(image != (const Image *) NULL);
1795 assert(image->signature == MagickSignature);
1796 if (image->debug != MagickFalse)
1797 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
1798 assert(exception != (ExceptionInfo *) NULL);
1799 assert(exception->signature == MagickSignature);
1800 width=GetOptimalKernelWidth1D(radius,sigma);
1801 kernel_info=AcquireKernelInfo((const char *) NULL);
1802 if (kernel_info == (KernelInfo *) NULL)
1803 ThrowImageException(ResourceLimitError,"MemoryAllocationFailed");
1804 kernel_info->width=width;
1805 kernel_info->height=width;
1806 kernel_info->values=(double *) AcquireAlignedMemory(kernel_info->width,
1807 kernel_info->width*sizeof(*kernel_info->values));
1808 if (kernel_info->values == (double *) NULL)
1810 kernel_info=DestroyKernelInfo(kernel_info);
1811 ThrowImageException(ResourceLimitError,"MemoryAllocationFailed");
1813 j=(ssize_t) kernel_info->width/2;
1815 for (v=(-j); v <= j; v++)
1817 for (u=(-j); u <= j; u++)
1819 kernel_info->values[i]=(-1.0);
1823 kernel_info->values[i/2]=(double) (width*width-1.0);
1824 kernel_info->bias=image->bias; /* FUTURE: User bias on a edge image? */
1825 edge_image=ConvolveImage(image,kernel_info,exception);
1826 kernel_info=DestroyKernelInfo(kernel_info);
1831 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1835 % E m b o s s I m a g e %
1839 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1841 % EmbossImage() returns a grayscale image with a three-dimensional effect.
1842 % We convolve the image with a Gaussian operator of the given radius and
1843 % standard deviation (sigma). For reasonable results, radius should be
1844 % larger than sigma. Use a radius of 0 and Emboss() selects a suitable
1847 % The format of the EmbossImage method is:
1849 % Image *EmbossImage(const Image *image,const double radius,
1850 % const double sigma,ExceptionInfo *exception)
1852 % A description of each parameter follows:
1854 % o image: the image.
1856 % o radius: the radius of the pixel neighborhood.
1858 % o sigma: the standard deviation of the Gaussian, in pixels.
1860 % o exception: return any errors or warnings in this structure.
1863 MagickExport Image *EmbossImage(const Image *image,const double radius,
1864 const double sigma,ExceptionInfo *exception)
1884 assert(image != (const Image *) NULL);
1885 assert(image->signature == MagickSignature);
1886 if (image->debug != MagickFalse)
1887 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
1888 assert(exception != (ExceptionInfo *) NULL);
1889 assert(exception->signature == MagickSignature);
1890 width=GetOptimalKernelWidth1D(radius,sigma);
1891 kernel_info=AcquireKernelInfo((const char *) NULL);
1892 if (kernel_info == (KernelInfo *) NULL)
1893 ThrowImageException(ResourceLimitError,"MemoryAllocationFailed");
1894 kernel_info->width=width;
1895 kernel_info->height=width;
1896 kernel_info->values=(double *) AcquireAlignedMemory(kernel_info->width,
1897 kernel_info->width*sizeof(*kernel_info->values));
1898 if (kernel_info->values == (double *) NULL)
1900 kernel_info=DestroyKernelInfo(kernel_info);
1901 ThrowImageException(ResourceLimitError,"MemoryAllocationFailed");
1903 j=(ssize_t) kernel_info->width/2;
1906 for (v=(-j); v <= j; v++)
1908 for (u=(-j); u <= j; u++)
1910 kernel_info->values[i]=(double) (((u < 0) || (v < 0) ? -8.0 : 8.0)*
1911 exp(-((double) u*u+v*v)/(2.0*MagickSigma*MagickSigma))/
1912 (2.0*MagickPI*MagickSigma*MagickSigma));
1914 kernel_info->values[i]=0.0;
1919 kernel_info->bias=image->bias; /* FUTURE: user bias on an edge image */
1920 emboss_image=ConvolveImage(image,kernel_info,exception);
1921 kernel_info=DestroyKernelInfo(kernel_info);
1922 if (emboss_image != (Image *) NULL)
1923 (void) EqualizeImage(emboss_image,exception);
1924 return(emboss_image);
1928 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1932 % G a u s s i a n B l u r I m a g e %
1936 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1938 % GaussianBlurImage() blurs an image. We convolve the image with a
1939 % Gaussian operator of the given radius and standard deviation (sigma).
1940 % For reasonable results, the radius should be larger than sigma. Use a
1941 % radius of 0 and GaussianBlurImage() selects a suitable radius for you
1943 % The format of the GaussianBlurImage method is:
1945 % Image *GaussianBlurImage(const Image *image,onst double radius,
1946 % const double sigma,const double bias,ExceptionInfo *exception)
1948 % A description of each parameter follows:
1950 % o image: the image.
1952 % o radius: the radius of the Gaussian, in pixels, not counting the center
1955 % o sigma: the standard deviation of the Gaussian, in pixels.
1959 % o exception: return any errors or warnings in this structure.
1962 MagickExport Image *GaussianBlurImage(const Image *image,const double radius,
1963 const double sigma,const double bias,ExceptionInfo *exception)
1982 assert(image != (const Image *) NULL);
1983 assert(image->signature == MagickSignature);
1984 if (image->debug != MagickFalse)
1985 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
1986 assert(exception != (ExceptionInfo *) NULL);
1987 assert(exception->signature == MagickSignature);
1988 width=GetOptimalKernelWidth2D(radius,sigma);
1989 kernel_info=AcquireKernelInfo((const char *) NULL);
1990 if (kernel_info == (KernelInfo *) NULL)
1991 ThrowImageException(ResourceLimitError,"MemoryAllocationFailed");
1992 (void) ResetMagickMemory(kernel_info,0,sizeof(*kernel_info));
1993 kernel_info->width=width;
1994 kernel_info->height=width;
1995 kernel_info->bias=bias; /* FUTURE: user bias on Gaussian Blur! non-sense */
1996 kernel_info->signature=MagickSignature;
1997 kernel_info->values=(double *) AcquireAlignedMemory(kernel_info->width,
1998 kernel_info->width*sizeof(*kernel_info->values));
1999 if (kernel_info->values == (double *) NULL)
2001 kernel_info=DestroyKernelInfo(kernel_info);
2002 ThrowImageException(ResourceLimitError,"MemoryAllocationFailed");
2004 j=(ssize_t) kernel_info->width/2;
2006 for (v=(-j); v <= j; v++)
2008 for (u=(-j); u <= j; u++)
2010 kernel_info->values[i]=(double) (exp(-((double) u*u+v*v)/(2.0*
2011 MagickSigma*MagickSigma))/(2.0*MagickPI*MagickSigma*MagickSigma));
2015 blur_image=ConvolveImage(image,kernel_info,exception);
2016 kernel_info=DestroyKernelInfo(kernel_info);
2021 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
2025 % M o t i o n B l u r I m a g e %
2029 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
2031 % MotionBlurImage() simulates motion blur. We convolve the image with a
2032 % Gaussian operator of the given radius and standard deviation (sigma).
2033 % For reasonable results, radius should be larger than sigma. Use a
2034 % radius of 0 and MotionBlurImage() selects a suitable radius for you.
2035 % Angle gives the angle of the blurring motion.
2037 % Andrew Protano contributed this effect.
2039 % The format of the MotionBlurImage method is:
2041 % Image *MotionBlurImage(const Image *image,const double radius,
2042 % const double sigma,const double angle,const double bias,
2043 % ExceptionInfo *exception)
2045 % A description of each parameter follows:
2047 % o image: the image.
2049 % o radius: the radius of the Gaussian, in pixels, not counting
2052 % o sigma: the standard deviation of the Gaussian, in pixels.
2054 % o angle: Apply the effect along this angle.
2058 % o exception: return any errors or warnings in this structure.
2062 static double *GetMotionBlurKernel(const size_t width,const double sigma)
2072 Generate a 1-D convolution kernel.
2074 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"...");
2075 kernel=(double *) AcquireQuantumMemory((size_t) width,sizeof(*kernel));
2076 if (kernel == (double *) NULL)
2079 for (i=0; i < (ssize_t) width; i++)
2081 kernel[i]=(double) (exp((-((double) i*i)/(double) (2.0*MagickSigma*
2082 MagickSigma)))/(MagickSQ2PI*MagickSigma));
2083 normalize+=kernel[i];
2085 for (i=0; i < (ssize_t) width; i++)
2086 kernel[i]/=normalize;
2090 MagickExport Image *MotionBlurImage(const Image *image,const double radius,
2091 const double sigma,const double angle,const double bias,
2092 ExceptionInfo *exception)
2125 assert(image != (Image *) NULL);
2126 assert(image->signature == MagickSignature);
2127 if (image->debug != MagickFalse)
2128 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
2129 assert(exception != (ExceptionInfo *) NULL);
2130 width=GetOptimalKernelWidth1D(radius,sigma);
2131 kernel=GetMotionBlurKernel(width,sigma);
2132 if (kernel == (double *) NULL)
2133 ThrowImageException(ResourceLimitError,"MemoryAllocationFailed");
2134 offset=(OffsetInfo *) AcquireQuantumMemory(width,sizeof(*offset));
2135 if (offset == (OffsetInfo *) NULL)
2137 kernel=(double *) RelinquishMagickMemory(kernel);
2138 ThrowImageException(ResourceLimitError,"MemoryAllocationFailed");
2140 blur_image=CloneImage(image,image->columns,image->rows,MagickTrue,exception);
2141 if (blur_image == (Image *) NULL)
2143 kernel=(double *) RelinquishMagickMemory(kernel);
2144 offset=(OffsetInfo *) RelinquishMagickMemory(offset);
2145 return((Image *) NULL);
2147 if (SetImageStorageClass(blur_image,DirectClass,exception) == MagickFalse)
2149 kernel=(double *) RelinquishMagickMemory(kernel);
2150 offset=(OffsetInfo *) RelinquishMagickMemory(offset);
2151 blur_image=DestroyImage(blur_image);
2152 return((Image *) NULL);
2154 point.x=(double) width*sin(DegreesToRadians(angle));
2155 point.y=(double) width*cos(DegreesToRadians(angle));
2156 for (i=0; i < (ssize_t) width; i++)
2158 offset[i].x=(ssize_t) ceil((double) (i*point.y)/hypot(point.x,point.y)-0.5);
2159 offset[i].y=(ssize_t) ceil((double) (i*point.x)/hypot(point.x,point.y)-0.5);
2166 image_view=AcquireCacheView(image);
2167 blur_view=AcquireCacheView(blur_image);
2168 #if defined(MAGICKCORE_OPENMP_SUPPORT)
2169 #pragma omp parallel for schedule(dynamic,4) shared(progress,status) omp_throttle(1)
2171 for (y=0; y < (ssize_t) image->rows; y++)
2173 register const Quantum
2182 if (status == MagickFalse)
2184 p=GetCacheViewVirtualPixels(blur_view,0,y,image->columns,1,exception);
2185 q=GetCacheViewAuthenticPixels(blur_view,0,y,blur_image->columns,1,
2187 if ((p == (const Quantum *) NULL) || (q == (Quantum *) NULL))
2192 for (x=0; x < (ssize_t) image->columns; x++)
2197 for (i=0; i < (ssize_t) GetPixelChannels(image); i++)
2211 register const Quantum
2220 channel=GetPixelChannelMapChannel(image,i);
2221 traits=GetPixelChannelMapTraits(image,channel);
2222 blur_traits=GetPixelChannelMapTraits(blur_image,channel);
2223 if ((traits == UndefinedPixelTrait) ||
2224 (blur_traits == UndefinedPixelTrait))
2226 if ((blur_traits & CopyPixelTrait) != 0)
2228 SetPixelChannel(blur_image,channel,p[i],q);
2233 if ((blur_traits & BlendPixelTrait) == 0)
2235 for (j=0; j < (ssize_t) width; j++)
2237 r=GetCacheViewVirtualPixels(image_view,x+offset[j].x,y+
2238 offset[j].y,1,1,exception);
2239 if (r == (const Quantum *) NULL)
2247 SetPixelChannel(blur_image,channel,ClampToQuantum(pixel),q);
2252 for (j=0; j < (ssize_t) width; j++)
2254 r=GetCacheViewVirtualPixels(image_view,x+offset[j].x,y+offset[j].y,1,
2256 if (r == (const Quantum *) NULL)
2261 alpha=(MagickRealType) (QuantumScale*GetPixelAlpha(image,r));
2262 pixel+=(*k)*alpha*r[i];
2266 gamma=1.0/(fabs((double) gamma) <= MagickEpsilon ? 1.0 : gamma);
2267 SetPixelChannel(blur_image,channel,ClampToQuantum(gamma*pixel),q);
2269 p+=GetPixelChannels(image);
2270 q+=GetPixelChannels(blur_image);
2272 if (SyncCacheViewAuthenticPixels(blur_view,exception) == MagickFalse)
2274 if (image->progress_monitor != (MagickProgressMonitor) NULL)
2279 #if defined(MAGICKCORE_OPENMP_SUPPORT)
2280 #pragma omp critical (MagickCore_MotionBlurImage)
2282 proceed=SetImageProgress(image,BlurImageTag,progress++,image->rows);
2283 if (proceed == MagickFalse)
2287 blur_view=DestroyCacheView(blur_view);
2288 image_view=DestroyCacheView(image_view);
2289 kernel=(double *) RelinquishMagickMemory(kernel);
2290 offset=(OffsetInfo *) RelinquishMagickMemory(offset);
2291 if (status == MagickFalse)
2292 blur_image=DestroyImage(blur_image);
2297 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
2301 % P r e v i e w I m a g e %
2305 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
2307 % PreviewImage() tiles 9 thumbnails of the specified image with an image
2308 % processing operation applied with varying parameters. This may be helpful
2309 % pin-pointing an appropriate parameter for a particular image processing
2312 % The format of the PreviewImages method is:
2314 % Image *PreviewImages(const Image *image,const PreviewType preview,
2315 % ExceptionInfo *exception)
2317 % A description of each parameter follows:
2319 % o image: the image.
2321 % o preview: the image processing operation.
2323 % o exception: return any errors or warnings in this structure.
2326 MagickExport Image *PreviewImage(const Image *image,const PreviewType preview,
2327 ExceptionInfo *exception)
2329 #define NumberTiles 9
2330 #define PreviewImageTag "Preview/Image"
2331 #define DefaultPreviewGeometry "204x204+10+10"
2334 factor[MaxTextExtent],
2335 label[MaxTextExtent];
2377 Open output image file.
2379 assert(image != (Image *) NULL);
2380 assert(image->signature == MagickSignature);
2381 if (image->debug != MagickFalse)
2382 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
2386 preview_info=AcquireImageInfo();
2387 SetGeometry(image,&geometry);
2388 (void) ParseMetaGeometry(DefaultPreviewGeometry,&geometry.x,&geometry.y,
2389 &geometry.width,&geometry.height);
2390 images=NewImageList();
2392 GetQuantizeInfo(&quantize_info);
2398 for (i=0; i < NumberTiles; i++)
2400 thumbnail=ThumbnailImage(image,geometry.width,geometry.height,exception);
2401 if (thumbnail == (Image *) NULL)
2403 (void) SetImageProgressMonitor(thumbnail,(MagickProgressMonitor) NULL,
2405 (void) SetImageProperty(thumbnail,"label",DefaultTileLabel,exception);
2406 if (i == (NumberTiles/2))
2408 (void) QueryColorCompliance("#dfdfdf",AllCompliance,
2409 &thumbnail->matte_color,exception);
2410 AppendImageToList(&images,thumbnail);
2418 preview_image=RotateImage(thumbnail,degrees,exception);
2419 (void) FormatLocaleString(label,MaxTextExtent,"rotate %g",degrees);
2425 preview_image=ShearImage(thumbnail,degrees,degrees,exception);
2426 (void) FormatLocaleString(label,MaxTextExtent,"shear %gx%g",
2427 degrees,2.0*degrees);
2432 x=(ssize_t) ((i+1)*thumbnail->columns)/NumberTiles;
2433 y=(ssize_t) ((i+1)*thumbnail->rows)/NumberTiles;
2434 preview_image=RollImage(thumbnail,x,y,exception);
2435 (void) FormatLocaleString(label,MaxTextExtent,"roll %+.20gx%+.20g",
2436 (double) x,(double) y);
2441 preview_image=CloneImage(thumbnail,0,0,MagickTrue,exception);
2442 if (preview_image == (Image *) NULL)
2444 (void) FormatLocaleString(factor,MaxTextExtent,"100,100,%g",
2446 (void) ModulateImage(preview_image,factor,exception);
2447 (void) FormatLocaleString(label,MaxTextExtent,"modulate %s",factor);
2450 case SaturationPreview:
2452 preview_image=CloneImage(thumbnail,0,0,MagickTrue,exception);
2453 if (preview_image == (Image *) NULL)
2455 (void) FormatLocaleString(factor,MaxTextExtent,"100,%g",
2457 (void) ModulateImage(preview_image,factor,exception);
2458 (void) FormatLocaleString(label,MaxTextExtent,"modulate %s",factor);
2461 case BrightnessPreview:
2463 preview_image=CloneImage(thumbnail,0,0,MagickTrue,exception);
2464 if (preview_image == (Image *) NULL)
2466 (void) FormatLocaleString(factor,MaxTextExtent,"%g",2.0*percentage);
2467 (void) ModulateImage(preview_image,factor,exception);
2468 (void) FormatLocaleString(label,MaxTextExtent,"modulate %s",factor);
2474 preview_image=CloneImage(thumbnail,0,0,MagickTrue,exception);
2475 if (preview_image == (Image *) NULL)
2478 (void) GammaImage(preview_image,gamma,exception);
2479 (void) FormatLocaleString(label,MaxTextExtent,"gamma %g",gamma);
2484 preview_image=CloneImage(thumbnail,0,0,MagickTrue,exception);
2485 if (preview_image != (Image *) NULL)
2486 for (x=0; x < i; x++)
2487 (void) ContrastImage(preview_image,MagickTrue,exception);
2488 (void) FormatLocaleString(label,MaxTextExtent,"contrast (%.20g)",
2494 preview_image=CloneImage(thumbnail,0,0,MagickTrue,exception);
2495 if (preview_image == (Image *) NULL)
2497 for (x=0; x < i; x++)
2498 (void) ContrastImage(preview_image,MagickFalse,exception);
2499 (void) FormatLocaleString(label,MaxTextExtent,"+contrast (%.20g)",
2503 case GrayscalePreview:
2505 preview_image=CloneImage(thumbnail,0,0,MagickTrue,exception);
2506 if (preview_image == (Image *) NULL)
2509 quantize_info.number_colors=colors;
2510 quantize_info.colorspace=GRAYColorspace;
2511 (void) QuantizeImage(&quantize_info,preview_image,exception);
2512 (void) FormatLocaleString(label,MaxTextExtent,
2513 "-colorspace gray -colors %.20g",(double) colors);
2516 case QuantizePreview:
2518 preview_image=CloneImage(thumbnail,0,0,MagickTrue,exception);
2519 if (preview_image == (Image *) NULL)
2522 quantize_info.number_colors=colors;
2523 (void) QuantizeImage(&quantize_info,preview_image,exception);
2524 (void) FormatLocaleString(label,MaxTextExtent,"colors %.20g",(double)
2528 case DespecklePreview:
2530 for (x=0; x < (i-1); x++)
2532 preview_image=DespeckleImage(thumbnail,exception);
2533 if (preview_image == (Image *) NULL)
2535 thumbnail=DestroyImage(thumbnail);
2536 thumbnail=preview_image;
2538 preview_image=DespeckleImage(thumbnail,exception);
2539 if (preview_image == (Image *) NULL)
2541 (void) FormatLocaleString(label,MaxTextExtent,"despeckle (%.20g)",
2545 case ReduceNoisePreview:
2547 preview_image=StatisticImage(thumbnail,NonpeakStatistic,(size_t) radius,
2548 (size_t) radius,exception);
2549 (void) FormatLocaleString(label,MaxTextExtent,"noise %g",radius);
2552 case AddNoisePreview:
2558 (void) CopyMagickString(factor,"uniform",MaxTextExtent);
2563 (void) CopyMagickString(factor,"gaussian",MaxTextExtent);
2568 (void) CopyMagickString(factor,"multiplicative",MaxTextExtent);
2573 (void) CopyMagickString(factor,"impulse",MaxTextExtent);
2578 (void) CopyMagickString(factor,"laplacian",MaxTextExtent);
2583 (void) CopyMagickString(factor,"Poisson",MaxTextExtent);
2588 (void) CopyMagickString(thumbnail->magick,"NULL",MaxTextExtent);
2592 preview_image=StatisticImage(thumbnail,NonpeakStatistic,(size_t) i,
2593 (size_t) i,exception);
2594 (void) FormatLocaleString(label,MaxTextExtent,"+noise %s",factor);
2597 case SharpenPreview:
2599 /* FUTURE: user bias on sharpen! This is non-sensical! */
2600 preview_image=SharpenImage(thumbnail,radius,sigma,image->bias,
2602 (void) FormatLocaleString(label,MaxTextExtent,"sharpen %gx%g",
2608 /* FUTURE: user bias on blur! This is non-sensical! */
2609 preview_image=BlurImage(thumbnail,radius,sigma,image->bias,exception);
2610 (void) FormatLocaleString(label,MaxTextExtent,"blur %gx%g",radius,
2614 case ThresholdPreview:
2616 preview_image=CloneImage(thumbnail,0,0,MagickTrue,exception);
2617 if (preview_image == (Image *) NULL)
2619 (void) BilevelImage(thumbnail,(double) (percentage*((MagickRealType)
2620 QuantumRange+1.0))/100.0,exception);
2621 (void) FormatLocaleString(label,MaxTextExtent,"threshold %g",
2622 (double) (percentage*((MagickRealType) QuantumRange+1.0))/100.0);
2625 case EdgeDetectPreview:
2627 preview_image=EdgeImage(thumbnail,radius,sigma,exception);
2628 (void) FormatLocaleString(label,MaxTextExtent,"edge %g",radius);
2633 preview_image=SpreadImage(thumbnail,radius,thumbnail->interpolate,
2635 (void) FormatLocaleString(label,MaxTextExtent,"spread %g",
2639 case SolarizePreview:
2641 preview_image=CloneImage(thumbnail,0,0,MagickTrue,exception);
2642 if (preview_image == (Image *) NULL)
2644 (void) SolarizeImage(preview_image,(double) QuantumRange*
2645 percentage/100.0,exception);
2646 (void) FormatLocaleString(label,MaxTextExtent,"solarize %g",
2647 (QuantumRange*percentage)/100.0);
2653 preview_image=ShadeImage(thumbnail,MagickTrue,degrees,degrees,
2655 (void) FormatLocaleString(label,MaxTextExtent,"shade %gx%g",
2661 preview_image=CloneImage(thumbnail,0,0,MagickTrue,exception);
2662 if (preview_image == (Image *) NULL)
2664 geometry.width=(size_t) (2*i+2);
2665 geometry.height=(size_t) (2*i+2);
2668 (void) RaiseImage(preview_image,&geometry,MagickTrue,exception);
2669 (void) FormatLocaleString(label,MaxTextExtent,
2670 "raise %.20gx%.20g%+.20g%+.20g",(double) geometry.width,(double)
2671 geometry.height,(double) geometry.x,(double) geometry.y);
2674 case SegmentPreview:
2676 preview_image=CloneImage(thumbnail,0,0,MagickTrue,exception);
2677 if (preview_image == (Image *) NULL)
2680 (void) SegmentImage(preview_image,RGBColorspace,MagickFalse,threshold,
2681 threshold,exception);
2682 (void) FormatLocaleString(label,MaxTextExtent,"segment %gx%g",
2683 threshold,threshold);
2688 preview_image=SwirlImage(thumbnail,degrees,image->interpolate,
2690 (void) FormatLocaleString(label,MaxTextExtent,"swirl %g",degrees);
2694 case ImplodePreview:
2697 preview_image=ImplodeImage(thumbnail,degrees,image->interpolate,
2699 (void) FormatLocaleString(label,MaxTextExtent,"implode %g",degrees);
2705 preview_image=WaveImage(thumbnail,0.5*degrees,2.0*degrees,
2706 image->interpolate,exception);
2707 (void) FormatLocaleString(label,MaxTextExtent,"wave %gx%g",
2708 0.5*degrees,2.0*degrees);
2711 case OilPaintPreview:
2713 preview_image=OilPaintImage(thumbnail,(double) radius,(double) sigma,
2715 (void) FormatLocaleString(label,MaxTextExtent,"charcoal %gx%g",
2719 case CharcoalDrawingPreview:
2721 /* FUTURE: user bias on charcoal! This is non-sensical! */
2722 preview_image=CharcoalImage(thumbnail,(double) radius,(double) sigma,
2723 image->bias,exception);
2724 (void) FormatLocaleString(label,MaxTextExtent,"charcoal %gx%g",
2731 filename[MaxTextExtent];
2739 preview_image=CloneImage(thumbnail,0,0,MagickTrue,exception);
2740 if (preview_image == (Image *) NULL)
2742 preview_info->quality=(size_t) percentage;
2743 (void) FormatLocaleString(factor,MaxTextExtent,"%.20g",(double)
2744 preview_info->quality);
2745 file=AcquireUniqueFileResource(filename);
2748 (void) FormatLocaleString(preview_image->filename,MaxTextExtent,
2749 "jpeg:%s",filename);
2750 status=WriteImage(preview_info,preview_image,exception);
2751 if (status != MagickFalse)
2756 (void) CopyMagickString(preview_info->filename,
2757 preview_image->filename,MaxTextExtent);
2758 quality_image=ReadImage(preview_info,exception);
2759 if (quality_image != (Image *) NULL)
2761 preview_image=DestroyImage(preview_image);
2762 preview_image=quality_image;
2765 (void) RelinquishUniqueFileResource(preview_image->filename);
2766 if ((GetBlobSize(preview_image)/1024) >= 1024)
2767 (void) FormatLocaleString(label,MaxTextExtent,"quality %s\n%gmb ",
2768 factor,(double) ((MagickOffsetType) GetBlobSize(preview_image))/
2771 if (GetBlobSize(preview_image) >= 1024)
2772 (void) FormatLocaleString(label,MaxTextExtent,
2773 "quality %s\n%gkb ",factor,(double) ((MagickOffsetType)
2774 GetBlobSize(preview_image))/1024.0);
2776 (void) FormatLocaleString(label,MaxTextExtent,"quality %s\n%.20gb ",
2777 factor,(double) ((MagickOffsetType) GetBlobSize(thumbnail)));
2781 thumbnail=DestroyImage(thumbnail);
2785 if (preview_image == (Image *) NULL)
2787 (void) DeleteImageProperty(preview_image,"label");
2788 (void) SetImageProperty(preview_image,"label",label,exception);
2789 AppendImageToList(&images,preview_image);
2790 proceed=SetImageProgress(image,PreviewImageTag,(MagickOffsetType) i,
2792 if (proceed == MagickFalse)
2795 if (images == (Image *) NULL)
2797 preview_info=DestroyImageInfo(preview_info);
2798 return((Image *) NULL);
2803 montage_info=CloneMontageInfo(preview_info,(MontageInfo *) NULL);
2804 (void) CopyMagickString(montage_info->filename,image->filename,MaxTextExtent);
2805 montage_info->shadow=MagickTrue;
2806 (void) CloneString(&montage_info->tile,"3x3");
2807 (void) CloneString(&montage_info->geometry,DefaultPreviewGeometry);
2808 (void) CloneString(&montage_info->frame,DefaultTileFrame);
2809 montage_image=MontageImages(images,montage_info,exception);
2810 montage_info=DestroyMontageInfo(montage_info);
2811 images=DestroyImageList(images);
2812 if (montage_image == (Image *) NULL)
2813 ThrowImageException(ResourceLimitError,"MemoryAllocationFailed");
2814 if (montage_image->montage != (char *) NULL)
2817 Free image directory.
2819 montage_image->montage=(char *) RelinquishMagickMemory(
2820 montage_image->montage);
2821 if (image->directory != (char *) NULL)
2822 montage_image->directory=(char *) RelinquishMagickMemory(
2823 montage_image->directory);
2825 preview_info=DestroyImageInfo(preview_info);
2826 return(montage_image);
2830 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
2834 % R a d i a l B l u r I m a g e %
2838 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
2840 % RadialBlurImage() applies a radial blur to the image.
2842 % Andrew Protano contributed this effect.
2844 % The format of the RadialBlurImage method is:
2846 % Image *RadialBlurImage(const Image *image,const double angle,
2847 % const double blur,ExceptionInfo *exception)
2849 % A description of each parameter follows:
2851 % o image: the image.
2853 % o angle: the angle of the radial blur.
2857 % o exception: return any errors or warnings in this structure.
2860 MagickExport Image *RadialBlurImage(const Image *image,const double angle,
2861 const double bias,ExceptionInfo *exception)
2896 Allocate blur image.
2898 assert(image != (Image *) NULL);
2899 assert(image->signature == MagickSignature);
2900 if (image->debug != MagickFalse)
2901 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
2902 assert(exception != (ExceptionInfo *) NULL);
2903 assert(exception->signature == MagickSignature);
2904 blur_image=CloneImage(image,image->columns,image->rows,MagickTrue,exception);
2905 if (blur_image == (Image *) NULL)
2906 return((Image *) NULL);
2907 if (SetImageStorageClass(blur_image,DirectClass,exception) == MagickFalse)
2909 blur_image=DestroyImage(blur_image);
2910 return((Image *) NULL);
2912 blur_center.x=(double) image->columns/2.0;
2913 blur_center.y=(double) image->rows/2.0;
2914 blur_radius=hypot(blur_center.x,blur_center.y);
2915 n=(size_t) fabs(4.0*DegreesToRadians(angle)*sqrt((double) blur_radius)+2UL);
2916 theta=DegreesToRadians(angle)/(MagickRealType) (n-1);
2917 cos_theta=(MagickRealType *) AcquireQuantumMemory((size_t) n,
2918 sizeof(*cos_theta));
2919 sin_theta=(MagickRealType *) AcquireQuantumMemory((size_t) n,
2920 sizeof(*sin_theta));
2921 if ((cos_theta == (MagickRealType *) NULL) ||
2922 (sin_theta == (MagickRealType *) NULL))
2924 blur_image=DestroyImage(blur_image);
2925 ThrowImageException(ResourceLimitError,"MemoryAllocationFailed");
2927 offset=theta*(MagickRealType) (n-1)/2.0;
2928 for (i=0; i < (ssize_t) n; i++)
2930 cos_theta[i]=cos((double) (theta*i-offset));
2931 sin_theta[i]=sin((double) (theta*i-offset));
2938 image_view=AcquireCacheView(image);
2939 blur_view=AcquireCacheView(blur_image);
2940 #if defined(MAGICKCORE_OPENMP_SUPPORT)
2941 #pragma omp parallel for schedule(dynamic,4) shared(progress,status)
2943 for (y=0; y < (ssize_t) image->rows; y++)
2945 register const Quantum
2954 if (status == MagickFalse)
2956 p=GetCacheViewVirtualPixels(blur_view,0,y,image->columns,1,exception);
2957 q=GetCacheViewAuthenticPixels(blur_view,0,y,blur_image->columns,1,
2959 if ((p == (const Quantum *) NULL) || (q == (Quantum *) NULL))
2964 for (x=0; x < (ssize_t) image->columns; x++)
2978 center.x=(double) x-blur_center.x;
2979 center.y=(double) y-blur_center.y;
2980 radius=hypot((double) center.x,center.y);
2985 step=(size_t) (blur_radius/radius);
2992 for (i=0; i < (ssize_t) GetPixelChannels(image); i++)
3005 register const Quantum
3011 channel=GetPixelChannelMapChannel(image,i);
3012 traits=GetPixelChannelMapTraits(image,channel);
3013 blur_traits=GetPixelChannelMapTraits(blur_image,channel);
3014 if ((traits == UndefinedPixelTrait) ||
3015 (blur_traits == UndefinedPixelTrait))
3017 if ((blur_traits & CopyPixelTrait) != 0)
3019 SetPixelChannel(blur_image,channel,p[i],q);
3024 if ((blur_traits & BlendPixelTrait) == 0)
3026 for (j=0; j < (ssize_t) n; j+=(ssize_t) step)
3028 r=GetCacheViewVirtualPixels(image_view, (ssize_t) (blur_center.x+
3029 center.x*cos_theta[j]-center.y*sin_theta[j]+0.5),(ssize_t)
3030 (blur_center.y+center.x*sin_theta[j]+center.y*cos_theta[j]+0.5),
3032 if (r == (const Quantum *) NULL)
3040 gamma=1.0/(fabs((double) gamma) <= MagickEpsilon ? 1.0 : gamma);
3041 SetPixelChannel(blur_image,channel,ClampToQuantum(gamma*pixel),q);
3044 for (j=0; j < (ssize_t) n; j+=(ssize_t) step)
3046 r=GetCacheViewVirtualPixels(image_view, (ssize_t) (blur_center.x+
3047 center.x*cos_theta[j]-center.y*sin_theta[j]+0.5),(ssize_t)
3048 (blur_center.y+center.x*sin_theta[j]+center.y*cos_theta[j]+0.5),
3050 if (r == (const Quantum *) NULL)
3055 pixel+=GetPixelAlpha(image,r)*r[i];
3056 gamma+=GetPixelAlpha(image,r);
3058 gamma=1.0/(fabs((double) gamma) <= MagickEpsilon ? 1.0 : gamma);
3059 SetPixelChannel(blur_image,channel,ClampToQuantum(gamma*pixel),q);
3061 p+=GetPixelChannels(image);
3062 q+=GetPixelChannels(blur_image);
3064 if (SyncCacheViewAuthenticPixels(blur_view,exception) == MagickFalse)
3066 if (image->progress_monitor != (MagickProgressMonitor) NULL)
3071 #if defined(MAGICKCORE_OPENMP_SUPPORT)
3072 #pragma omp critical (MagickCore_RadialBlurImage)
3074 proceed=SetImageProgress(image,BlurImageTag,progress++,image->rows);
3075 if (proceed == MagickFalse)
3079 blur_view=DestroyCacheView(blur_view);
3080 image_view=DestroyCacheView(image_view);
3081 cos_theta=(MagickRealType *) RelinquishMagickMemory(cos_theta);
3082 sin_theta=(MagickRealType *) RelinquishMagickMemory(sin_theta);
3083 if (status == MagickFalse)
3084 blur_image=DestroyImage(blur_image);
3089 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3093 % S e l e c t i v e B l u r I m a g e %
3097 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3099 % SelectiveBlurImage() selectively blur pixels within a contrast threshold.
3100 % It is similar to the unsharpen mask that sharpens everything with contrast
3101 % above a certain threshold.
3103 % The format of the SelectiveBlurImage method is:
3105 % Image *SelectiveBlurImage(const Image *image,const double radius,
3106 % const double sigma,const double threshold,const double bias,
3107 % ExceptionInfo *exception)
3109 % A description of each parameter follows:
3111 % o image: the image.
3113 % o radius: the radius of the Gaussian, in pixels, not counting the center
3116 % o sigma: the standard deviation of the Gaussian, in pixels.
3118 % o threshold: only pixels within this contrast threshold are included
3119 % in the blur operation.
3123 % o exception: return any errors or warnings in this structure.
3126 MagickExport Image *SelectiveBlurImage(const Image *image,const double radius,
3127 const double sigma,const double threshold,const double bias,
3128 ExceptionInfo *exception)
3130 #define SelectiveBlurImageTag "SelectiveBlur/Image"
3162 Initialize blur image attributes.
3164 assert(image != (Image *) NULL);
3165 assert(image->signature == MagickSignature);
3166 if (image->debug != MagickFalse)
3167 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
3168 assert(exception != (ExceptionInfo *) NULL);
3169 assert(exception->signature == MagickSignature);
3170 width=GetOptimalKernelWidth1D(radius,sigma);
3171 kernel=(double *) AcquireQuantumMemory((size_t) width,width*sizeof(*kernel));
3172 if (kernel == (double *) NULL)
3173 ThrowImageException(ResourceLimitError,"MemoryAllocationFailed");
3174 j=(ssize_t) width/2;
3176 for (v=(-j); v <= j; v++)
3178 for (u=(-j); u <= j; u++)
3179 kernel[i++]=(double) (exp(-((double) u*u+v*v)/(2.0*MagickSigma*
3180 MagickSigma))/(2.0*MagickPI*MagickSigma*MagickSigma));
3182 if (image->debug != MagickFalse)
3185 format[MaxTextExtent],
3188 register const double
3195 (void) LogMagickEvent(TransformEvent,GetMagickModule(),
3196 " SelectiveBlurImage with %.20gx%.20g kernel:",(double) width,(double)
3198 message=AcquireString("");
3200 for (v=0; v < (ssize_t) width; v++)
3203 (void) FormatLocaleString(format,MaxTextExtent,"%.20g: ",(double) v);
3204 (void) ConcatenateString(&message,format);
3205 for (u=0; u < (ssize_t) width; u++)
3207 (void) FormatLocaleString(format,MaxTextExtent,"%+f ",*k++);
3208 (void) ConcatenateString(&message,format);
3210 (void) LogMagickEvent(TransformEvent,GetMagickModule(),"%s",message);
3212 message=DestroyString(message);
3214 blur_image=CloneImage(image,image->columns,image->rows,MagickTrue,exception);
3215 if (blur_image == (Image *) NULL)
3216 return((Image *) NULL);
3217 if (SetImageStorageClass(blur_image,DirectClass,exception) == MagickFalse)
3219 blur_image=DestroyImage(blur_image);
3220 return((Image *) NULL);
3223 Threshold blur image.
3227 center=(ssize_t) (GetPixelChannels(image)*(image->columns+width)*(width/2L)+
3228 GetPixelChannels(image)*(width/2L));
3229 image_view=AcquireCacheView(image);
3230 blur_view=AcquireCacheView(blur_image);
3231 #if defined(MAGICKCORE_OPENMP_SUPPORT)
3232 #pragma omp parallel for schedule(dynamic,4) shared(progress,status)
3234 for (y=0; y < (ssize_t) image->rows; y++)
3242 register const Quantum
3251 if (status == MagickFalse)
3253 p=GetCacheViewVirtualPixels(image_view,-((ssize_t) width/2L),y-(ssize_t)
3254 (width/2L),image->columns+width,width,exception);
3255 q=GetCacheViewAuthenticPixels(blur_view,0,y,blur_image->columns,1,
3257 if ((p == (const Quantum *) NULL) || (q == (Quantum *) NULL))
3262 for (x=0; x < (ssize_t) image->columns; x++)
3267 for (i=0; i < (ssize_t) GetPixelChannels(image); i++)
3282 register const double
3285 register const Quantum
3294 channel=GetPixelChannelMapChannel(image,i);
3295 traits=GetPixelChannelMapTraits(image,channel);
3296 blur_traits=GetPixelChannelMapTraits(blur_image,channel);
3297 if ((traits == UndefinedPixelTrait) ||
3298 (blur_traits == UndefinedPixelTrait))
3300 if ((blur_traits & CopyPixelTrait) != 0)
3302 SetPixelChannel(blur_image,channel,p[center+i],q);
3308 intensity=(MagickRealType) GetPixelIntensity(image,p+center);
3310 if ((blur_traits & BlendPixelTrait) == 0)
3312 for (v=0; v < (ssize_t) width; v++)
3314 for (u=0; u < (ssize_t) width; u++)
3316 contrast=GetPixelIntensity(image,pixels)-intensity;
3317 if (fabs(contrast) < threshold)
3319 pixel+=(*k)*pixels[i];
3323 pixels+=GetPixelChannels(image);
3325 pixels+=image->columns*GetPixelChannels(image);
3327 if (fabs((double) gamma) < MagickEpsilon)
3329 SetPixelChannel(blur_image,channel,p[center+i],q);
3332 gamma=1.0/(fabs((double) gamma) <= MagickEpsilon ? 1.0 : gamma);
3333 SetPixelChannel(blur_image,channel,ClampToQuantum(gamma*pixel),q);
3336 for (v=0; v < (ssize_t) width; v++)
3338 for (u=0; u < (ssize_t) width; u++)
3340 contrast=GetPixelIntensity(image,pixels)-intensity;
3341 if (fabs(contrast) < threshold)
3343 alpha=(MagickRealType) (QuantumScale*
3344 GetPixelAlpha(image,pixels));
3345 pixel+=(*k)*alpha*pixels[i];
3349 pixels+=GetPixelChannels(image);
3351 pixels+=image->columns*GetPixelChannels(image);
3353 if (fabs((double) gamma) < MagickEpsilon)
3355 SetPixelChannel(blur_image,channel,p[center+i],q);
3358 gamma=1.0/(fabs((double) gamma) <= MagickEpsilon ? 1.0 : gamma);
3359 SetPixelChannel(blur_image,channel,ClampToQuantum(gamma*pixel),q);
3361 p+=GetPixelChannels(image);
3362 q+=GetPixelChannels(blur_image);
3364 sync=SyncCacheViewAuthenticPixels(blur_view,exception);
3365 if (sync == MagickFalse)
3367 if (image->progress_monitor != (MagickProgressMonitor) NULL)
3372 #if defined(MAGICKCORE_OPENMP_SUPPORT)
3373 #pragma omp critical (MagickCore_SelectiveBlurImage)
3375 proceed=SetImageProgress(image,SelectiveBlurImageTag,progress++,
3377 if (proceed == MagickFalse)
3381 blur_image->type=image->type;
3382 blur_view=DestroyCacheView(blur_view);
3383 image_view=DestroyCacheView(image_view);
3384 kernel=(double *) RelinquishMagickMemory(kernel);
3385 if (status == MagickFalse)
3386 blur_image=DestroyImage(blur_image);
3391 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3395 % S h a d e I m a g e %
3399 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3401 % ShadeImage() shines a distant light on an image to create a
3402 % three-dimensional effect. You control the positioning of the light with
3403 % azimuth and elevation; azimuth is measured in degrees off the x axis
3404 % and elevation is measured in pixels above the Z axis.
3406 % The format of the ShadeImage method is:
3408 % Image *ShadeImage(const Image *image,const MagickBooleanType gray,
3409 % const double azimuth,const double elevation,ExceptionInfo *exception)
3411 % A description of each parameter follows:
3413 % o image: the image.
3415 % o gray: A value other than zero shades the intensity of each pixel.
3417 % o azimuth, elevation: Define the light source direction.
3419 % o exception: return any errors or warnings in this structure.
3422 MagickExport Image *ShadeImage(const Image *image,const MagickBooleanType gray,
3423 const double azimuth,const double elevation,ExceptionInfo *exception)
3425 #define ShadeImageTag "Shade/Image"
3447 Initialize shaded image attributes.
3449 assert(image != (const Image *) NULL);
3450 assert(image->signature == MagickSignature);
3451 if (image->debug != MagickFalse)
3452 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
3453 assert(exception != (ExceptionInfo *) NULL);
3454 assert(exception->signature == MagickSignature);
3455 shade_image=CloneImage(image,image->columns,image->rows,MagickTrue,exception);
3456 if (shade_image == (Image *) NULL)
3457 return((Image *) NULL);
3458 if (SetImageStorageClass(shade_image,DirectClass,exception) == MagickFalse)
3460 shade_image=DestroyImage(shade_image);
3461 return((Image *) NULL);
3464 Compute the light vector.
3466 light.x=(double) QuantumRange*cos(DegreesToRadians(azimuth))*
3467 cos(DegreesToRadians(elevation));
3468 light.y=(double) QuantumRange*sin(DegreesToRadians(azimuth))*
3469 cos(DegreesToRadians(elevation));
3470 light.z=(double) QuantumRange*sin(DegreesToRadians(elevation));
3476 image_view=AcquireCacheView(image);
3477 shade_view=AcquireCacheView(shade_image);
3478 #if defined(MAGICKCORE_OPENMP_SUPPORT)
3479 #pragma omp parallel for schedule(dynamic,4) shared(progress,status)
3481 for (y=0; y < (ssize_t) image->rows; y++)
3491 register const Quantum
3503 if (status == MagickFalse)
3505 p=GetCacheViewVirtualPixels(image_view,-1,y-1,image->columns+2,3,exception);
3506 q=QueueCacheViewAuthenticPixels(shade_view,0,y,shade_image->columns,1,
3508 if ((p == (const Quantum *) NULL) || (q == (Quantum *) NULL))
3514 Shade this row of pixels.
3516 normal.z=2.0*(double) QuantumRange; /* constant Z of surface normal */
3517 pre=p+GetPixelChannels(image);
3518 center=pre+(image->columns+2)*GetPixelChannels(image);
3519 post=center+(image->columns+2)*GetPixelChannels(image);
3520 for (x=0; x < (ssize_t) image->columns; x++)
3526 Determine the surface normal and compute shading.
3528 normal.x=(double) (GetPixelIntensity(image,pre-GetPixelChannels(image))+
3529 GetPixelIntensity(image,center-GetPixelChannels(image))+
3530 GetPixelIntensity(image,post-GetPixelChannels(image))-
3531 GetPixelIntensity(image,pre+GetPixelChannels(image))-
3532 GetPixelIntensity(image,center+GetPixelChannels(image))-
3533 GetPixelIntensity(image,post+GetPixelChannels(image)));
3534 normal.y=(double) (GetPixelIntensity(image,post-GetPixelChannels(image))+
3535 GetPixelIntensity(image,post)+GetPixelIntensity(image,post+
3536 GetPixelChannels(image))-GetPixelIntensity(image,pre-
3537 GetPixelChannels(image))-GetPixelIntensity(image,pre)-
3538 GetPixelIntensity(image,pre+GetPixelChannels(image)));
3539 if ((normal.x == 0.0) && (normal.y == 0.0))
3544 distance=normal.x*light.x+normal.y*light.y+normal.z*light.z;
3545 if (distance > MagickEpsilon)
3548 normal.x*normal.x+normal.y*normal.y+normal.z*normal.z;
3549 if (normal_distance > (MagickEpsilon*MagickEpsilon))
3550 shade=distance/sqrt((double) normal_distance);
3553 for (i=0; i < (ssize_t) GetPixelChannels(image); i++)
3562 channel=GetPixelChannelMapChannel(image,i);
3563 traits=GetPixelChannelMapTraits(image,channel);
3564 shade_traits=GetPixelChannelMapTraits(shade_image,channel);
3565 if ((traits == UndefinedPixelTrait) ||
3566 (shade_traits == UndefinedPixelTrait))
3568 if ((shade_traits & CopyPixelTrait) != 0)
3570 SetPixelChannel(shade_image,channel,center[i],q);
3573 if (gray != MagickFalse)
3575 SetPixelChannel(shade_image,channel,ClampToQuantum(shade),q);
3578 SetPixelChannel(shade_image,channel,ClampToQuantum(QuantumScale*shade*
3581 pre+=GetPixelChannels(image);
3582 center+=GetPixelChannels(image);
3583 post+=GetPixelChannels(image);
3584 q+=GetPixelChannels(shade_image);
3586 if (SyncCacheViewAuthenticPixels(shade_view,exception) == MagickFalse)
3588 if (image->progress_monitor != (MagickProgressMonitor) NULL)
3593 #if defined(MAGICKCORE_OPENMP_SUPPORT)
3594 #pragma omp critical (MagickCore_ShadeImage)
3596 proceed=SetImageProgress(image,ShadeImageTag,progress++,image->rows);
3597 if (proceed == MagickFalse)
3601 shade_view=DestroyCacheView(shade_view);
3602 image_view=DestroyCacheView(image_view);
3603 if (status == MagickFalse)
3604 shade_image=DestroyImage(shade_image);
3605 return(shade_image);
3609 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3613 % S h a r p e n I m a g e %
3617 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3619 % SharpenImage() sharpens the image. We convolve the image with a Gaussian
3620 % operator of the given radius and standard deviation (sigma). For
3621 % reasonable results, radius should be larger than sigma. Use a radius of 0
3622 % and SharpenImage() selects a suitable radius for you.
3624 % Using a separable kernel would be faster, but the negative weights cancel
3625 % out on the corners of the kernel producing often undesirable ringing in the
3626 % filtered result; this can be avoided by using a 2D gaussian shaped image
3627 % sharpening kernel instead.
3629 % The format of the SharpenImage method is:
3631 % Image *SharpenImage(const Image *image,const double radius,
3632 % const double sigma,const double bias,ExceptionInfo *exception)
3634 % A description of each parameter follows:
3636 % o image: the image.
3638 % o radius: the radius of the Gaussian, in pixels, not counting the center
3641 % o sigma: the standard deviation of the Laplacian, in pixels.
3645 % o exception: return any errors or warnings in this structure.
3648 MagickExport Image *SharpenImage(const Image *image,const double radius,
3649 const double sigma,const double bias,ExceptionInfo *exception)
3671 assert(image != (const Image *) NULL);
3672 assert(image->signature == MagickSignature);
3673 if (image->debug != MagickFalse)
3674 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
3675 assert(exception != (ExceptionInfo *) NULL);
3676 assert(exception->signature == MagickSignature);
3677 width=GetOptimalKernelWidth2D(radius,sigma);
3678 kernel_info=AcquireKernelInfo((const char *) NULL);
3679 if (kernel_info == (KernelInfo *) NULL)
3680 ThrowImageException(ResourceLimitError,"MemoryAllocationFailed");
3681 (void) ResetMagickMemory(kernel_info,0,sizeof(*kernel_info));
3682 kernel_info->width=width;
3683 kernel_info->height=width;
3684 kernel_info->bias=bias; /* FUTURE: user bias - non-sensical! */
3685 kernel_info->signature=MagickSignature;
3686 kernel_info->values=(double *) AcquireAlignedMemory(kernel_info->width,
3687 kernel_info->width*sizeof(*kernel_info->values));
3688 if (kernel_info->values == (double *) NULL)
3690 kernel_info=DestroyKernelInfo(kernel_info);
3691 ThrowImageException(ResourceLimitError,"MemoryAllocationFailed");
3694 j=(ssize_t) kernel_info->width/2;
3696 for (v=(-j); v <= j; v++)
3698 for (u=(-j); u <= j; u++)
3700 kernel_info->values[i]=(double) (-exp(-((double) u*u+v*v)/(2.0*
3701 MagickSigma*MagickSigma))/(2.0*MagickPI*MagickSigma*MagickSigma));
3702 normalize+=kernel_info->values[i];
3706 kernel_info->values[i/2]=(double) ((-2.0)*normalize);
3707 sharp_image=ConvolveImage(image,kernel_info,exception);
3708 kernel_info=DestroyKernelInfo(kernel_info);
3709 return(sharp_image);
3713 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3717 % S p r e a d I m a g e %
3721 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3723 % SpreadImage() is a special effects method that randomly displaces each
3724 % pixel in a block defined by the radius parameter.
3726 % The format of the SpreadImage method is:
3728 % Image *SpreadImage(const Image *image,const double radius,
3729 % const PixelInterpolateMethod method,ExceptionInfo *exception)
3731 % A description of each parameter follows:
3733 % o image: the image.
3735 % o radius: choose a random pixel in a neighborhood of this extent.
3737 % o method: the pixel interpolation method.
3739 % o exception: return any errors or warnings in this structure.
3742 MagickExport Image *SpreadImage(const Image *image,const double radius,
3743 const PixelInterpolateMethod method,ExceptionInfo *exception)
3745 #define SpreadImageTag "Spread/Image"
3761 **restrict random_info;
3770 Initialize spread image attributes.
3772 assert(image != (Image *) NULL);
3773 assert(image->signature == MagickSignature);
3774 if (image->debug != MagickFalse)
3775 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
3776 assert(exception != (ExceptionInfo *) NULL);
3777 assert(exception->signature == MagickSignature);
3778 spread_image=CloneImage(image,image->columns,image->rows,MagickTrue,
3780 if (spread_image == (Image *) NULL)
3781 return((Image *) NULL);
3782 if (SetImageStorageClass(spread_image,DirectClass,exception) == MagickFalse)
3784 spread_image=DestroyImage(spread_image);
3785 return((Image *) NULL);
3792 width=GetOptimalKernelWidth1D(radius,0.5);
3793 random_info=AcquireRandomInfoThreadSet();
3794 image_view=AcquireCacheView(image);
3795 spread_view=AcquireCacheView(spread_image);
3796 #if defined(MAGICKCORE_OPENMP_SUPPORT)
3797 #pragma omp parallel for schedule(dynamic,4) shared(progress,status) omp_throttle(1)
3799 for (y=0; y < (ssize_t) image->rows; y++)
3802 id = GetOpenMPThreadId();
3804 register const Quantum
3813 if (status == MagickFalse)
3815 p=GetCacheViewVirtualPixels(image_view,0,y,image->columns,1,exception);
3816 q=QueueCacheViewAuthenticPixels(spread_view,0,y,spread_image->columns,1,
3818 if ((p == (const Quantum *) NULL) || (q == (Quantum *) NULL))
3823 for (x=0; x < (ssize_t) image->columns; x++)
3828 point.x=GetPseudoRandomValue(random_info[id]);
3829 point.y=GetPseudoRandomValue(random_info[id]);
3830 status=InterpolatePixelChannels(image,image_view,spread_image,method,
3831 (double) x+width*point.x-0.5,(double) y+width*point.y-0.5,q,exception);
3832 q+=GetPixelChannels(spread_image);
3834 if (SyncCacheViewAuthenticPixels(spread_view,exception) == MagickFalse)
3836 if (image->progress_monitor != (MagickProgressMonitor) NULL)
3841 #if defined(MAGICKCORE_OPENMP_SUPPORT)
3842 #pragma omp critical (MagickCore_SpreadImage)
3844 proceed=SetImageProgress(image,SpreadImageTag,progress++,image->rows);
3845 if (proceed == MagickFalse)
3849 spread_view=DestroyCacheView(spread_view);
3850 image_view=DestroyCacheView(image_view);
3851 random_info=DestroyRandomInfoThreadSet(random_info);
3852 return(spread_image);
3856 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3860 % U n s h a r p M a s k I m a g e %
3864 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3866 % UnsharpMaskImage() sharpens one or more image channels. We convolve the
3867 % image with a Gaussian operator of the given radius and standard deviation
3868 % (sigma). For reasonable results, radius should be larger than sigma. Use a
3869 % radius of 0 and UnsharpMaskImage() selects a suitable radius for you.
3871 % The format of the UnsharpMaskImage method is:
3873 % Image *UnsharpMaskImage(const Image *image,const double radius,
3874 % const double sigma,const double amount,const double threshold,
3875 % ExceptionInfo *exception)
3877 % A description of each parameter follows:
3879 % o image: the image.
3881 % o radius: the radius of the Gaussian, in pixels, not counting the center
3884 % o sigma: the standard deviation of the Gaussian, in pixels.
3886 % o amount: the percentage of the difference between the original and the
3887 % blur image that is added back into the original.
3889 % o threshold: the threshold in pixels needed to apply the diffence amount.
3891 % o exception: return any errors or warnings in this structure.
3894 MagickExport Image *UnsharpMaskImage(const Image *image,const double radius,
3895 const double sigma,const double amount,const double threshold,
3896 ExceptionInfo *exception)
3898 #define SharpenImageTag "Sharpen/Image"
3919 assert(image != (const Image *) NULL);
3920 assert(image->signature == MagickSignature);
3921 if (image->debug != MagickFalse)
3922 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
3923 assert(exception != (ExceptionInfo *) NULL);
3926 /* FUTURE: use of bias on sharpen is non-sensical */
3927 unsharp_image=BlurImage(image,radius,sigma,image->bias,exception);
3929 if (unsharp_image == (Image *) NULL)
3930 return((Image *) NULL);
3931 quantum_threshold=(MagickRealType) QuantumRange*threshold;
3937 image_view=AcquireCacheView(image);
3938 unsharp_view=AcquireCacheView(unsharp_image);
3939 #if defined(MAGICKCORE_OPENMP_SUPPORT)
3940 #pragma omp parallel for schedule(dynamic,4) shared(progress,status)
3942 for (y=0; y < (ssize_t) image->rows; y++)
3944 register const Quantum
3953 if (status == MagickFalse)
3955 p=GetCacheViewVirtualPixels(image_view,0,y,image->columns,1,exception);
3956 q=GetCacheViewAuthenticPixels(unsharp_view,0,y,unsharp_image->columns,1,
3958 if ((p == (const Quantum *) NULL) || (q == (Quantum *) NULL))
3963 for (x=0; x < (ssize_t) image->columns; x++)
3968 for (i=0; i < (ssize_t) GetPixelChannels(image); i++)
3980 channel=GetPixelChannelMapChannel(image,i);
3981 traits=GetPixelChannelMapTraits(image,channel);
3982 unsharp_traits=GetPixelChannelMapTraits(unsharp_image,channel);
3983 if ((traits == UndefinedPixelTrait) ||
3984 (unsharp_traits == UndefinedPixelTrait))
3986 if ((unsharp_traits & CopyPixelTrait) != 0)
3988 SetPixelChannel(unsharp_image,channel,p[i],q);
3991 pixel=p[i]-(MagickRealType) GetPixelChannel(unsharp_image,channel,q);
3992 if (fabs(2.0*pixel) < quantum_threshold)
3993 pixel=(MagickRealType) p[i];
3995 pixel=(MagickRealType) p[i]+amount*pixel;
3996 SetPixelChannel(unsharp_image,channel,ClampToQuantum(pixel),q);
3998 p+=GetPixelChannels(image);
3999 q+=GetPixelChannels(unsharp_image);
4001 if (SyncCacheViewAuthenticPixels(unsharp_view,exception) == MagickFalse)
4003 if (image->progress_monitor != (MagickProgressMonitor) NULL)
4008 #if defined(MAGICKCORE_OPENMP_SUPPORT)
4009 #pragma omp critical (MagickCore_UnsharpMaskImage)
4011 proceed=SetImageProgress(image,SharpenImageTag,progress++,image->rows);
4012 if (proceed == MagickFalse)
4016 unsharp_image->type=image->type;
4017 unsharp_view=DestroyCacheView(unsharp_view);
4018 image_view=DestroyCacheView(image_view);
4019 if (status == MagickFalse)
4020 unsharp_image=DestroyImage(unsharp_image);
4021 return(unsharp_image);