| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % SSSSS TTTTT AAA TTTTT IIIII SSSSS TTTTT IIIII CCCC % |
| % SS T A A T I SS T I C % |
| % SSS T AAAAA T I SSS T I C % |
| % SS T A A T I SS T I C % |
| % SSSSS T A A T IIIII SSSSS T IIIII CCCC % |
| % % |
| % % |
| % MagickCore Image Statistical Methods % |
| % % |
| % Software Design % |
| % John Cristy % |
| % July 1992 % |
| % % |
| % % |
| % Copyright 1999-2011 ImageMagick Studio LLC, a non-profit organization % |
| % dedicated to making software imaging solutions freely available. % |
| % % |
| % You may not use this file except in compliance with the License. You may % |
| % obtain a copy of the License at % |
| % % |
| % http://www.imagemagick.org/script/license.php % |
| % % |
| % Unless required by applicable law or agreed to in writing, software % |
| % distributed under the License is distributed on an "AS IS" BASIS, % |
| % WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. % |
| % See the License for the specific language governing permissions and % |
| % limitations under the License. % |
| % % |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % |
| % |
| % |
| */ |
| |
| /* |
| Include declarations. |
| */ |
| #include "MagickCore/studio.h" |
| #include "MagickCore/property.h" |
| #include "MagickCore/animate.h" |
| #include "MagickCore/blob.h" |
| #include "MagickCore/blob-private.h" |
| #include "MagickCore/cache.h" |
| #include "MagickCore/cache-private.h" |
| #include "MagickCore/cache-view.h" |
| #include "MagickCore/client.h" |
| #include "MagickCore/color.h" |
| #include "MagickCore/color-private.h" |
| #include "MagickCore/colorspace.h" |
| #include "MagickCore/colorspace-private.h" |
| #include "MagickCore/composite.h" |
| #include "MagickCore/composite-private.h" |
| #include "MagickCore/compress.h" |
| #include "MagickCore/constitute.h" |
| #include "MagickCore/display.h" |
| #include "MagickCore/draw.h" |
| #include "MagickCore/enhance.h" |
| #include "MagickCore/exception.h" |
| #include "MagickCore/exception-private.h" |
| #include "MagickCore/gem.h" |
| #include "MagickCore/gem-private.h" |
| #include "MagickCore/geometry.h" |
| #include "MagickCore/list.h" |
| #include "MagickCore/image-private.h" |
| #include "MagickCore/magic.h" |
| #include "MagickCore/magick.h" |
| #include "MagickCore/memory_.h" |
| #include "MagickCore/module.h" |
| #include "MagickCore/monitor.h" |
| #include "MagickCore/monitor-private.h" |
| #include "MagickCore/option.h" |
| #include "MagickCore/paint.h" |
| #include "MagickCore/pixel-accessor.h" |
| #include "MagickCore/profile.h" |
| #include "MagickCore/quantize.h" |
| #include "MagickCore/quantum-private.h" |
| #include "MagickCore/random_.h" |
| #include "MagickCore/random-private.h" |
| #include "MagickCore/segment.h" |
| #include "MagickCore/semaphore.h" |
| #include "MagickCore/signature-private.h" |
| #include "MagickCore/statistic.h" |
| #include "MagickCore/string_.h" |
| #include "MagickCore/thread-private.h" |
| #include "MagickCore/timer.h" |
| #include "MagickCore/utility.h" |
| #include "MagickCore/version.h" |
| |
| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % E v a l u a t e I m a g e % |
| % % |
| % % |
| % % |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % |
| % EvaluateImage() applies a value to the image with an arithmetic, relational, |
| % or logical operator to an image. Use these operations to lighten or darken |
| % an image, to increase or decrease contrast in an image, or to produce the |
| % "negative" of an image. |
| % |
| % The format of the EvaluateImage method is: |
| % |
| % MagickBooleanType EvaluateImage(Image *image, |
| % const MagickEvaluateOperator op,const double value, |
| % ExceptionInfo *exception) |
| % MagickBooleanType EvaluateImages(Image *images, |
| % const MagickEvaluateOperator op,const double value, |
| % ExceptionInfo *exception) |
| % |
| % A description of each parameter follows: |
| % |
| % o image: the image. |
| % |
| % o op: A channel op. |
| % |
| % o value: A value value. |
| % |
| % o exception: return any errors or warnings in this structure. |
| % |
| */ |
| |
| typedef struct _WenusInfo |
| { |
| MagickRealType |
| channel[MaxPixelChannels]; |
| } WenusInfo; |
| |
| static WenusInfo **DestroyPixelThreadSet(WenusInfo **pixels) |
| { |
| register ssize_t |
| i; |
| |
| assert(pixels != (WenusInfo **) NULL); |
| for (i=0; i < (ssize_t) GetOpenMPMaximumThreads(); i++) |
| if (pixels[i] != (WenusInfo *) NULL) |
| pixels[i]=(WenusInfo *) RelinquishMagickMemory(pixels[i]); |
| pixels=(WenusInfo **) RelinquishMagickMemory(pixels); |
| return(pixels); |
| } |
| |
| static WenusInfo **AcquirePixelThreadSet(const Image *image, |
| const size_t number_images) |
| { |
| register ssize_t |
| i; |
| |
| WenusInfo |
| **pixels; |
| |
| size_t |
| length, |
| number_threads; |
| |
| number_threads=GetOpenMPMaximumThreads(); |
| pixels=(WenusInfo **) AcquireQuantumMemory(number_threads,sizeof(*pixels)); |
| if (pixels == (WenusInfo **) NULL) |
| return((WenusInfo **) NULL); |
| (void) ResetMagickMemory(pixels,0,number_threads*sizeof(*pixels)); |
| for (i=0; i < (ssize_t) number_threads; i++) |
| { |
| register ssize_t |
| j; |
| |
| length=image->columns; |
| if (length < number_images) |
| length=number_images; |
| pixels[i]=(WenusInfo *) AcquireQuantumMemory(length,sizeof(**pixels)); |
| if (pixels[i] == (WenusInfo *) NULL) |
| return(DestroyPixelThreadSet(pixels)); |
| for (j=0; j < (ssize_t) length; j++) |
| { |
| register ssize_t |
| k; |
| |
| for (k=0; k < MaxPixelChannels; k++) |
| pixels[i][j].channel[k]=0.0; |
| } |
| } |
| return(pixels); |
| } |
| |
| static inline double MagickMax(const double x,const double y) |
| { |
| if (x > y) |
| return(x); |
| return(y); |
| } |
| |
| #if defined(__cplusplus) || defined(c_plusplus) |
| extern "C" { |
| #endif |
| |
| static int IntensityCompare(const void *x,const void *y) |
| { |
| const WenusInfo |
| *color_1, |
| *color_2; |
| |
| MagickRealType |
| distance; |
| |
| register ssize_t |
| i; |
| |
| color_1=(const WenusInfo *) x; |
| color_2=(const WenusInfo *) y; |
| distance=0.0; |
| for (i=0; i < MaxPixelChannels; i++) |
| distance+=color_1->channel[i]-(MagickRealType) color_2->channel[i]; |
| return(distance < 0 ? -1 : distance > 0 ? 1 : 0); |
| } |
| |
| #if defined(__cplusplus) || defined(c_plusplus) |
| } |
| #endif |
| |
| static inline double MagickMin(const double x,const double y) |
| { |
| if (x < y) |
| return(x); |
| return(y); |
| } |
| |
| static MagickRealType ApplyEvaluateOperator(RandomInfo *random_info, |
| Quantum pixel,const MagickEvaluateOperator op,const MagickRealType value) |
| { |
| MagickRealType |
| result; |
| |
| result=0.0; |
| switch (op) |
| { |
| case UndefinedEvaluateOperator: |
| break; |
| case AbsEvaluateOperator: |
| { |
| result=(MagickRealType) fabs((double) (pixel+value)); |
| break; |
| } |
| case AddEvaluateOperator: |
| { |
| result=(MagickRealType) (pixel+value); |
| break; |
| } |
| case AddModulusEvaluateOperator: |
| { |
| /* |
| This returns a 'floored modulus' of the addition which is a |
| positive result. It differs from % or fmod() that returns a |
| 'truncated modulus' result, where floor() is replaced by trunc() and |
| could return a negative result (which is clipped). |
| */ |
| result=pixel+value; |
| result-=(QuantumRange+1.0)*floor((double) result/(QuantumRange+1.0)); |
| break; |
| } |
| case AndEvaluateOperator: |
| { |
| result=(MagickRealType) ((size_t) pixel & (size_t) (value+0.5)); |
| break; |
| } |
| case CosineEvaluateOperator: |
| { |
| result=(MagickRealType) (QuantumRange*(0.5*cos((double) (2.0*MagickPI* |
| QuantumScale*pixel*value))+0.5)); |
| break; |
| } |
| case DivideEvaluateOperator: |
| { |
| result=pixel/(value == 0.0 ? 1.0 : value); |
| break; |
| } |
| case ExponentialEvaluateOperator: |
| { |
| result=(MagickRealType) (QuantumRange*exp((double) (value*QuantumScale* |
| pixel))); |
| break; |
| } |
| case GaussianNoiseEvaluateOperator: |
| { |
| result=(MagickRealType) GenerateDifferentialNoise(random_info,pixel, |
| GaussianNoise,value); |
| break; |
| } |
| case ImpulseNoiseEvaluateOperator: |
| { |
| result=(MagickRealType) GenerateDifferentialNoise(random_info,pixel, |
| ImpulseNoise,value); |
| break; |
| } |
| case LaplacianNoiseEvaluateOperator: |
| { |
| result=(MagickRealType) GenerateDifferentialNoise(random_info,pixel, |
| LaplacianNoise,value); |
| break; |
| } |
| case LeftShiftEvaluateOperator: |
| { |
| result=(MagickRealType) ((size_t) pixel << (size_t) (value+0.5)); |
| break; |
| } |
| case LogEvaluateOperator: |
| { |
| result=(MagickRealType) (QuantumRange*log((double) (QuantumScale*value* |
| pixel+1.0))/log((double) (value+1.0))); |
| break; |
| } |
| case MaxEvaluateOperator: |
| { |
| result=(MagickRealType) MagickMax((double) pixel,value); |
| break; |
| } |
| case MeanEvaluateOperator: |
| { |
| result=(MagickRealType) (pixel+value); |
| break; |
| } |
| case MedianEvaluateOperator: |
| { |
| result=(MagickRealType) (pixel+value); |
| break; |
| } |
| case MinEvaluateOperator: |
| { |
| result=(MagickRealType) MagickMin((double) pixel,value); |
| break; |
| } |
| case MultiplicativeNoiseEvaluateOperator: |
| { |
| result=(MagickRealType) GenerateDifferentialNoise(random_info,pixel, |
| MultiplicativeGaussianNoise,value); |
| break; |
| } |
| case MultiplyEvaluateOperator: |
| { |
| result=(MagickRealType) (value*pixel); |
| break; |
| } |
| case OrEvaluateOperator: |
| { |
| result=(MagickRealType) ((size_t) pixel | (size_t) (value+0.5)); |
| break; |
| } |
| case PoissonNoiseEvaluateOperator: |
| { |
| result=(MagickRealType) GenerateDifferentialNoise(random_info,pixel, |
| PoissonNoise,value); |
| break; |
| } |
| case PowEvaluateOperator: |
| { |
| result=(MagickRealType) (QuantumRange*pow((double) (QuantumScale*pixel), |
| (double) value)); |
| break; |
| } |
| case RightShiftEvaluateOperator: |
| { |
| result=(MagickRealType) ((size_t) pixel >> (size_t) (value+0.5)); |
| break; |
| } |
| case SetEvaluateOperator: |
| { |
| result=value; |
| break; |
| } |
| case SineEvaluateOperator: |
| { |
| result=(MagickRealType) (QuantumRange*(0.5*sin((double) (2.0*MagickPI* |
| QuantumScale*pixel*value))+0.5)); |
| break; |
| } |
| case SubtractEvaluateOperator: |
| { |
| result=(MagickRealType) (pixel-value); |
| break; |
| } |
| case ThresholdEvaluateOperator: |
| { |
| result=(MagickRealType) (((MagickRealType) pixel <= value) ? 0 : |
| QuantumRange); |
| break; |
| } |
| case ThresholdBlackEvaluateOperator: |
| { |
| result=(MagickRealType) (((MagickRealType) pixel <= value) ? 0 : pixel); |
| break; |
| } |
| case ThresholdWhiteEvaluateOperator: |
| { |
| result=(MagickRealType) (((MagickRealType) pixel > value) ? QuantumRange : |
| pixel); |
| break; |
| } |
| case UniformNoiseEvaluateOperator: |
| { |
| result=(MagickRealType) GenerateDifferentialNoise(random_info,pixel, |
| UniformNoise,value); |
| break; |
| } |
| case XorEvaluateOperator: |
| { |
| result=(MagickRealType) ((size_t) pixel ^ (size_t) (value+0.5)); |
| break; |
| } |
| } |
| return(result); |
| } |
| |
| MagickExport Image *EvaluateImages(const Image *images, |
| const MagickEvaluateOperator op,ExceptionInfo *exception) |
| { |
| #define EvaluateImageTag "Evaluate/Image" |
| |
| CacheView |
| *evaluate_view; |
| |
| const Image |
| *next; |
| |
| Image |
| *evaluate_image; |
| |
| MagickBooleanType |
| status; |
| |
| MagickOffsetType |
| progress; |
| |
| WenusInfo |
| **restrict evaluate_pixels; |
| |
| RandomInfo |
| **restrict random_info; |
| |
| size_t |
| number_images; |
| |
| ssize_t |
| y; |
| |
| /* |
| Ensure the image are the same size. |
| */ |
| assert(images != (Image *) NULL); |
| assert(images->signature == MagickSignature); |
| if (images->debug != MagickFalse) |
| (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",images->filename); |
| assert(exception != (ExceptionInfo *) NULL); |
| assert(exception->signature == MagickSignature); |
| for (next=images; next != (Image *) NULL; next=GetNextImageInList(next)) |
| if ((next->columns != images->columns) || (next->rows != images->rows)) |
| { |
| (void) ThrowMagickException(exception,GetMagickModule(),OptionError, |
| "ImageWidthsOrHeightsDiffer","`%s'",images->filename); |
| return((Image *) NULL); |
| } |
| /* |
| Initialize evaluate next attributes. |
| */ |
| evaluate_image=CloneImage(images,images->columns,images->rows,MagickTrue, |
| exception); |
| if (evaluate_image == (Image *) NULL) |
| return((Image *) NULL); |
| if (SetImageStorageClass(evaluate_image,DirectClass,exception) == MagickFalse) |
| { |
| evaluate_image=DestroyImage(evaluate_image); |
| return((Image *) NULL); |
| } |
| number_images=GetImageListLength(images); |
| evaluate_pixels=AcquirePixelThreadSet(images,number_images); |
| if (evaluate_pixels == (WenusInfo **) NULL) |
| { |
| evaluate_image=DestroyImage(evaluate_image); |
| (void) ThrowMagickException(exception,GetMagickModule(), |
| ResourceLimitError,"MemoryAllocationFailed","`%s'",images->filename); |
| return((Image *) NULL); |
| } |
| /* |
| Evaluate image pixels. |
| */ |
| status=MagickTrue; |
| progress=0; |
| random_info=AcquireRandomInfoThreadSet(); |
| evaluate_view=AcquireCacheView(evaluate_image); |
| if (op == MedianEvaluateOperator) |
| #if defined(MAGICKCORE_OPENMP_SUPPORT) |
| #pragma omp parallel for schedule(dynamic) shared(progress,status) |
| #endif |
| for (y=0; y < (ssize_t) evaluate_image->rows; y++) |
| { |
| CacheView |
| *image_view; |
| |
| const Image |
| *next; |
| |
| const int |
| id = GetOpenMPThreadId(); |
| |
| register WenusInfo |
| *evaluate_pixel; |
| |
| register Quantum |
| *restrict q; |
| |
| register ssize_t |
| x; |
| |
| if (status == MagickFalse) |
| continue; |
| q=QueueCacheViewAuthenticPixels(evaluate_view,0,y,evaluate_image->columns, |
| 1,exception); |
| if (q == (Quantum *) NULL) |
| { |
| status=MagickFalse; |
| continue; |
| } |
| evaluate_pixel=evaluate_pixels[id]; |
| for (x=0; x < (ssize_t) evaluate_image->columns; x++) |
| { |
| register ssize_t |
| j, |
| k; |
| |
| for (j=0; j < (ssize_t) number_images; j++) |
| for (k=0; k < MaxPixelChannels; k++) |
| evaluate_pixel[j].channel[k]=0.0; |
| next=images; |
| for (j=0; j < (ssize_t) number_images; j++) |
| { |
| register const Quantum |
| *p; |
| |
| register ssize_t |
| i; |
| |
| image_view=AcquireCacheView(next); |
| p=GetCacheViewVirtualPixels(image_view,x,y,1,1,exception); |
| if (p == (const Quantum *) NULL) |
| { |
| image_view=DestroyCacheView(image_view); |
| break; |
| } |
| for (i=0; i < (ssize_t) GetPixelChannels(evaluate_image); i++) |
| { |
| PixelChannel |
| channel; |
| |
| PixelTrait |
| evaluate_traits, |
| traits; |
| |
| evaluate_traits=GetPixelChannelMapTraits(evaluate_image, |
| (PixelChannel) i); |
| channel=GetPixelChannelMapChannel(evaluate_image,(PixelChannel) i); |
| traits=GetPixelChannelMapTraits(next,channel); |
| if ((traits == UndefinedPixelTrait) || |
| (evaluate_traits == UndefinedPixelTrait)) |
| continue; |
| if ((evaluate_traits & UpdatePixelTrait) == 0) |
| continue; |
| evaluate_pixel[j].channel[i]=ApplyEvaluateOperator(random_info[id], |
| GetPixelChannel(evaluate_image,channel,p),op, |
| evaluate_pixel[j].channel[i]); |
| } |
| image_view=DestroyCacheView(image_view); |
| next=GetNextImageInList(next); |
| } |
| qsort((void *) evaluate_pixel,number_images,sizeof(*evaluate_pixel), |
| IntensityCompare); |
| for (k=0; k < (ssize_t) GetPixelChannels(evaluate_image); k++) |
| q[k]=ClampToQuantum(evaluate_pixel[j/2].channel[k]); |
| q+=GetPixelChannels(evaluate_image); |
| } |
| if (SyncCacheViewAuthenticPixels(evaluate_view,exception) == MagickFalse) |
| status=MagickFalse; |
| if (images->progress_monitor != (MagickProgressMonitor) NULL) |
| { |
| MagickBooleanType |
| proceed; |
| |
| #if defined(MAGICKCORE_OPENMP_SUPPORT) |
| #pragma omp critical (MagickCore_EvaluateImages) |
| #endif |
| proceed=SetImageProgress(images,EvaluateImageTag,progress++, |
| evaluate_image->rows); |
| if (proceed == MagickFalse) |
| status=MagickFalse; |
| } |
| } |
| else |
| #if defined(MAGICKCORE_OPENMP_SUPPORT) |
| #pragma omp parallel for schedule(dynamic) shared(progress,status) |
| #endif |
| for (y=0; y < (ssize_t) evaluate_image->rows; y++) |
| { |
| CacheView |
| *image_view; |
| |
| const Image |
| *next; |
| |
| const int |
| id = GetOpenMPThreadId(); |
| |
| register ssize_t |
| i, |
| x; |
| |
| register WenusInfo |
| *evaluate_pixel; |
| |
| register Quantum |
| *restrict q; |
| |
| ssize_t |
| j; |
| |
| if (status == MagickFalse) |
| continue; |
| q=QueueCacheViewAuthenticPixels(evaluate_view,0,y,evaluate_image->columns, |
| 1,exception); |
| if (q == (Quantum *) NULL) |
| { |
| status=MagickFalse; |
| continue; |
| } |
| evaluate_pixel=evaluate_pixels[id]; |
| for (j=0; j < (ssize_t) evaluate_image->columns; j++) |
| for (i=0; i < MaxPixelChannels; i++) |
| evaluate_pixel[j].channel[i]=0.0; |
| next=images; |
| for (j=0; j < (ssize_t) number_images; j++) |
| { |
| register const Quantum |
| *p; |
| |
| image_view=AcquireCacheView(next); |
| p=GetCacheViewVirtualPixels(image_view,0,y,next->columns,1,exception); |
| if (p == (const Quantum *) NULL) |
| { |
| image_view=DestroyCacheView(image_view); |
| break; |
| } |
| for (x=0; x < (ssize_t) next->columns; x++) |
| { |
| register ssize_t |
| i; |
| |
| for (i=0; i < (ssize_t) GetPixelChannels(evaluate_image); i++) |
| { |
| PixelChannel |
| channel; |
| |
| PixelTrait |
| evaluate_traits, |
| traits; |
| |
| evaluate_traits=GetPixelChannelMapTraits(evaluate_image, |
| (PixelChannel) i); |
| channel=GetPixelChannelMapChannel(evaluate_image,(PixelChannel) i); |
| traits=GetPixelChannelMapTraits(next,channel); |
| if ((traits == UndefinedPixelTrait) || |
| (evaluate_traits == UndefinedPixelTrait)) |
| continue; |
| if ((traits & UpdatePixelTrait) == 0) |
| continue; |
| evaluate_pixel[x].channel[i]=ApplyEvaluateOperator(random_info[id], |
| GetPixelChannel(evaluate_image,channel,p),j == 0 ? |
| AddEvaluateOperator : op,evaluate_pixel[x].channel[i]); |
| } |
| p+=GetPixelChannels(next); |
| } |
| image_view=DestroyCacheView(image_view); |
| next=GetNextImageInList(next); |
| } |
| for (x=0; x < (ssize_t) evaluate_image->columns; x++) |
| { |
| register ssize_t |
| i; |
| |
| switch (op) |
| { |
| case MeanEvaluateOperator: |
| { |
| for (i=0; i < (ssize_t) GetPixelChannels(evaluate_image); i++) |
| evaluate_pixel[x].channel[i]/=(MagickRealType) number_images; |
| break; |
| } |
| case MultiplyEvaluateOperator: |
| { |
| for (i=0; i < (ssize_t) GetPixelChannels(evaluate_image); i++) |
| { |
| register ssize_t |
| j; |
| |
| for (j=0; j < (ssize_t) (number_images-1); j++) |
| evaluate_pixel[x].channel[i]*=QuantumScale; |
| } |
| break; |
| } |
| default: |
| break; |
| } |
| } |
| for (x=0; x < (ssize_t) evaluate_image->columns; x++) |
| { |
| register ssize_t |
| i; |
| |
| for (i=0; i < (ssize_t) GetPixelChannels(evaluate_image); i++) |
| { |
| PixelTrait |
| traits; |
| |
| traits=GetPixelChannelMapTraits(evaluate_image,(PixelChannel) i); |
| if (traits == UndefinedPixelTrait) |
| continue; |
| if ((traits & UpdatePixelTrait) == 0) |
| continue; |
| q[i]=ClampToQuantum(evaluate_pixel[x].channel[i]); |
| } |
| q+=GetPixelChannels(evaluate_image); |
| } |
| if (SyncCacheViewAuthenticPixels(evaluate_view,exception) == MagickFalse) |
| status=MagickFalse; |
| if (images->progress_monitor != (MagickProgressMonitor) NULL) |
| { |
| MagickBooleanType |
| proceed; |
| |
| #if defined(MAGICKCORE_OPENMP_SUPPORT) |
| #pragma omp critical (MagickCore_EvaluateImages) |
| #endif |
| proceed=SetImageProgress(images,EvaluateImageTag,progress++, |
| evaluate_image->rows); |
| if (proceed == MagickFalse) |
| status=MagickFalse; |
| } |
| } |
| evaluate_view=DestroyCacheView(evaluate_view); |
| evaluate_pixels=DestroyPixelThreadSet(evaluate_pixels); |
| random_info=DestroyRandomInfoThreadSet(random_info); |
| if (status == MagickFalse) |
| evaluate_image=DestroyImage(evaluate_image); |
| return(evaluate_image); |
| } |
| |
| MagickExport MagickBooleanType EvaluateImage(Image *image, |
| const MagickEvaluateOperator op,const double value,ExceptionInfo *exception) |
| { |
| CacheView |
| *image_view; |
| |
| MagickBooleanType |
| status; |
| |
| MagickOffsetType |
| progress; |
| |
| RandomInfo |
| **restrict random_info; |
| |
| ssize_t |
| y; |
| |
| assert(image != (Image *) NULL); |
| assert(image->signature == MagickSignature); |
| if (image->debug != MagickFalse) |
| (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename); |
| assert(exception != (ExceptionInfo *) NULL); |
| assert(exception->signature == MagickSignature); |
| if (SetImageStorageClass(image,DirectClass,exception) == MagickFalse) |
| return(MagickFalse); |
| status=MagickTrue; |
| progress=0; |
| random_info=AcquireRandomInfoThreadSet(); |
| image_view=AcquireCacheView(image); |
| #if defined(MAGICKCORE_OPENMP_SUPPORT) |
| #pragma omp parallel for schedule(dynamic,4) shared(progress,status) |
| #endif |
| for (y=0; y < (ssize_t) image->rows; y++) |
| { |
| const int |
| id = GetOpenMPThreadId(); |
| |
| register Quantum |
| *restrict q; |
| |
| register ssize_t |
| x; |
| |
| if (status == MagickFalse) |
| continue; |
| q=GetCacheViewAuthenticPixels(image_view,0,y,image->columns,1,exception); |
| if (q == (Quantum *) NULL) |
| { |
| status=MagickFalse; |
| continue; |
| } |
| for (x=0; x < (ssize_t) image->columns; x++) |
| { |
| register ssize_t |
| i; |
| |
| for (i=0; i < (ssize_t) GetPixelChannels(image); i++) |
| { |
| PixelTrait |
| traits; |
| |
| traits=GetPixelChannelMapTraits(image,(PixelChannel) i); |
| if (traits == UndefinedPixelTrait) |
| continue; |
| q[i]=ClampToQuantum(ApplyEvaluateOperator(random_info[id],q[i],op, |
| value)); |
| } |
| q+=GetPixelChannels(image); |
| } |
| if (SyncCacheViewAuthenticPixels(image_view,exception) == MagickFalse) |
| status=MagickFalse; |
| if (image->progress_monitor != (MagickProgressMonitor) NULL) |
| { |
| MagickBooleanType |
| proceed; |
| |
| #if defined(MAGICKCORE_OPENMP_SUPPORT) |
| #pragma omp critical (MagickCore_EvaluateImage) |
| #endif |
| proceed=SetImageProgress(image,EvaluateImageTag,progress++,image->rows); |
| if (proceed == MagickFalse) |
| status=MagickFalse; |
| } |
| } |
| image_view=DestroyCacheView(image_view); |
| random_info=DestroyRandomInfoThreadSet(random_info); |
| return(status); |
| } |
| |
| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % F u n c t i o n I m a g e % |
| % % |
| % % |
| % % |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % |
| % FunctionImage() applies a value to the image with an arithmetic, relational, |
| % or logical operator to an image. Use these operations to lighten or darken |
| % an image, to increase or decrease contrast in an image, or to produce the |
| % "negative" of an image. |
| % |
| % The format of the FunctionImage method is: |
| % |
| % MagickBooleanType FunctionImage(Image *image, |
| % const MagickFunction function,const ssize_t number_parameters, |
| % const double *parameters,ExceptionInfo *exception) |
| % |
| % A description of each parameter follows: |
| % |
| % o image: the image. |
| % |
| % o function: A channel function. |
| % |
| % o parameters: one or more parameters. |
| % |
| % o exception: return any errors or warnings in this structure. |
| % |
| */ |
| |
| static Quantum ApplyFunction(Quantum pixel,const MagickFunction function, |
| const size_t number_parameters,const double *parameters, |
| ExceptionInfo *exception) |
| { |
| MagickRealType |
| result; |
| |
| register ssize_t |
| i; |
| |
| (void) exception; |
| result=0.0; |
| switch (function) |
| { |
| case PolynomialFunction: |
| { |
| /* |
| Polynomial: polynomial constants, highest to lowest order |
| (e.g. c0*x^3 + c1*x^2 + c2*x + c3). |
| */ |
| result=0.0; |
| for (i=0; i < (ssize_t) number_parameters; i++) |
| result=result*QuantumScale*pixel+parameters[i]; |
| result*=QuantumRange; |
| break; |
| } |
| case SinusoidFunction: |
| { |
| MagickRealType |
| amplitude, |
| bias, |
| frequency, |
| phase; |
| |
| /* |
| Sinusoid: frequency, phase, amplitude, bias. |
| */ |
| frequency=(number_parameters >= 1) ? parameters[0] : 1.0; |
| phase=(number_parameters >= 2) ? parameters[1] : 0.0; |
| amplitude=(number_parameters >= 3) ? parameters[2] : 0.5; |
| bias=(number_parameters >= 4) ? parameters[3] : 0.5; |
| result=(MagickRealType) (QuantumRange*(amplitude*sin((double) (2.0* |
| MagickPI*(frequency*QuantumScale*pixel+phase/360.0)))+bias)); |
| break; |
| } |
| case ArcsinFunction: |
| { |
| MagickRealType |
| bias, |
| center, |
| range, |
| width; |
| |
| /* |
| Arcsin (peged at range limits for invalid results): |
| width, center, range, and bias. |
| */ |
| width=(number_parameters >= 1) ? parameters[0] : 1.0; |
| center=(number_parameters >= 2) ? parameters[1] : 0.5; |
| range=(number_parameters >= 3) ? parameters[2] : 1.0; |
| bias=(number_parameters >= 4) ? parameters[3] : 0.5; |
| result=2.0/width*(QuantumScale*pixel-center); |
| if ( result <= -1.0 ) |
| result=bias-range/2.0; |
| else |
| if (result >= 1.0) |
| result=bias+range/2.0; |
| else |
| result=(MagickRealType) (range/MagickPI*asin((double) result)+bias); |
| result*=QuantumRange; |
| break; |
| } |
| case ArctanFunction: |
| { |
| MagickRealType |
| center, |
| bias, |
| range, |
| slope; |
| |
| /* |
| Arctan: slope, center, range, and bias. |
| */ |
| slope=(number_parameters >= 1) ? parameters[0] : 1.0; |
| center=(number_parameters >= 2) ? parameters[1] : 0.5; |
| range=(number_parameters >= 3) ? parameters[2] : 1.0; |
| bias=(number_parameters >= 4) ? parameters[3] : 0.5; |
| result=(MagickRealType) (MagickPI*slope*(QuantumScale*pixel-center)); |
| result=(MagickRealType) (QuantumRange*(range/MagickPI*atan((double) |
| result)+bias)); |
| break; |
| } |
| case UndefinedFunction: |
| break; |
| } |
| return(ClampToQuantum(result)); |
| } |
| |
| MagickExport MagickBooleanType FunctionImage(Image *image, |
| const MagickFunction function,const size_t number_parameters, |
| const double *parameters,ExceptionInfo *exception) |
| { |
| #define FunctionImageTag "Function/Image " |
| |
| CacheView |
| *image_view; |
| |
| MagickBooleanType |
| status; |
| |
| MagickOffsetType |
| progress; |
| |
| ssize_t |
| y; |
| |
| assert(image != (Image *) NULL); |
| assert(image->signature == MagickSignature); |
| if (image->debug != MagickFalse) |
| (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename); |
| assert(exception != (ExceptionInfo *) NULL); |
| assert(exception->signature == MagickSignature); |
| if (SetImageStorageClass(image,DirectClass,exception) == MagickFalse) |
| return(MagickFalse); |
| status=MagickTrue; |
| progress=0; |
| image_view=AcquireCacheView(image); |
| #if defined(MAGICKCORE_OPENMP_SUPPORT) |
| #pragma omp parallel for schedule(dynamic,4) shared(progress,status) |
| #endif |
| for (y=0; y < (ssize_t) image->rows; y++) |
| { |
| register Quantum |
| *restrict q; |
| |
| register ssize_t |
| x; |
| |
| if (status == MagickFalse) |
| continue; |
| q=GetCacheViewAuthenticPixels(image_view,0,y,image->columns,1,exception); |
| if (q == (Quantum *) NULL) |
| { |
| status=MagickFalse; |
| continue; |
| } |
| for (x=0; x < (ssize_t) image->columns; x++) |
| { |
| register ssize_t |
| i; |
| |
| for (i=0; i < (ssize_t) GetPixelChannels(image); i++) |
| { |
| PixelTrait |
| traits; |
| |
| traits=GetPixelChannelMapTraits(image,(PixelChannel) i); |
| if (traits == UndefinedPixelTrait) |
| continue; |
| if ((traits & UpdatePixelTrait) == 0) |
| continue; |
| q[i]=ApplyFunction(q[i],function,number_parameters,parameters, |
| exception); |
| } |
| q+=GetPixelChannels(image); |
| } |
| if (SyncCacheViewAuthenticPixels(image_view,exception) == MagickFalse) |
| status=MagickFalse; |
| if (image->progress_monitor != (MagickProgressMonitor) NULL) |
| { |
| MagickBooleanType |
| proceed; |
| |
| #if defined(MAGICKCORE_OPENMP_SUPPORT) |
| #pragma omp critical (MagickCore_FunctionImage) |
| #endif |
| proceed=SetImageProgress(image,FunctionImageTag,progress++,image->rows); |
| if (proceed == MagickFalse) |
| status=MagickFalse; |
| } |
| } |
| image_view=DestroyCacheView(image_view); |
| return(status); |
| } |
| |
| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % G e t I m a g e E x t r e m a % |
| % % |
| % % |
| % % |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % |
| % GetImageExtrema() returns the extrema of one or more image channels. |
| % |
| % The format of the GetImageExtrema method is: |
| % |
| % MagickBooleanType GetImageExtrema(const Image *image,size_t *minima, |
| % size_t *maxima,ExceptionInfo *exception) |
| % |
| % A description of each parameter follows: |
| % |
| % o image: the image. |
| % |
| % o minima: the minimum value in the channel. |
| % |
| % o maxima: the maximum value in the channel. |
| % |
| % o exception: return any errors or warnings in this structure. |
| % |
| */ |
| MagickExport MagickBooleanType GetImageExtrema(const Image *image, |
| size_t *minima,size_t *maxima,ExceptionInfo *exception) |
| { |
| double |
| max, |
| min; |
| |
| MagickBooleanType |
| status; |
| |
| assert(image != (Image *) NULL); |
| assert(image->signature == MagickSignature); |
| if (image->debug != MagickFalse) |
| (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename); |
| status=GetImageRange(image,&min,&max,exception); |
| *minima=(size_t) ceil(min-0.5); |
| *maxima=(size_t) floor(max+0.5); |
| return(status); |
| } |
| |
| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % G e t I m a g e M e a n % |
| % % |
| % % |
| % % |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % |
| % GetImageMean() returns the mean and standard deviation of one or more |
| % image channels. |
| % |
| % The format of the GetImageMean method is: |
| % |
| % MagickBooleanType GetImageMean(const Image *image,double *mean, |
| % double *standard_deviation,ExceptionInfo *exception) |
| % |
| % A description of each parameter follows: |
| % |
| % o image: the image. |
| % |
| % o mean: the average value in the channel. |
| % |
| % o standard_deviation: the standard deviation of the channel. |
| % |
| % o exception: return any errors or warnings in this structure. |
| % |
| */ |
| MagickExport MagickBooleanType GetImageMean(const Image *image,double *mean, |
| double *standard_deviation,ExceptionInfo *exception) |
| { |
| ChannelStatistics |
| *channel_statistics; |
| |
| register ssize_t |
| i; |
| |
| size_t |
| area; |
| |
| assert(image != (Image *) NULL); |
| assert(image->signature == MagickSignature); |
| if (image->debug != MagickFalse) |
| (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename); |
| channel_statistics=GetImageStatistics(image,exception); |
| if (channel_statistics == (ChannelStatistics *) NULL) |
| return(MagickFalse); |
| area=0; |
| channel_statistics[MaxPixelChannels].mean=0.0; |
| channel_statistics[MaxPixelChannels].standard_deviation=0.0; |
| for (i=0; i < (ssize_t) GetPixelChannels(image); i++) |
| { |
| PixelTrait |
| traits; |
| |
| traits=GetPixelChannelMapTraits(image,(PixelChannel) i); |
| if (traits == UndefinedPixelTrait) |
| continue; |
| if ((traits & UpdatePixelTrait) == 0) |
| continue; |
| channel_statistics[MaxPixelChannels].mean+=channel_statistics[i].mean; |
| channel_statistics[MaxPixelChannels].standard_deviation+= |
| channel_statistics[i].variance-channel_statistics[i].mean* |
| channel_statistics[i].mean; |
| area++; |
| } |
| channel_statistics[MaxPixelChannels].mean/=area; |
| channel_statistics[MaxPixelChannels].standard_deviation= |
| sqrt(channel_statistics[MaxPixelChannels].standard_deviation/area); |
| *mean=channel_statistics[MaxPixelChannels].mean; |
| *standard_deviation=channel_statistics[MaxPixelChannels].standard_deviation; |
| channel_statistics=(ChannelStatistics *) RelinquishMagickMemory( |
| channel_statistics); |
| return(MagickTrue); |
| } |
| |
| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % G e t I m a g e K u r t o s i s % |
| % % |
| % % |
| % % |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % |
| % GetImageKurtosis() returns the kurtosis and skewness of one or more |
| % image channels. |
| % |
| % The format of the GetImageKurtosis method is: |
| % |
| % MagickBooleanType GetImageKurtosis(const Image *image,double *kurtosis, |
| % double *skewness,ExceptionInfo *exception) |
| % |
| % A description of each parameter follows: |
| % |
| % o image: the image. |
| % |
| % o kurtosis: the kurtosis of the channel. |
| % |
| % o skewness: the skewness of the channel. |
| % |
| % o exception: return any errors or warnings in this structure. |
| % |
| */ |
| MagickExport MagickBooleanType GetImageKurtosis(const Image *image, |
| double *kurtosis,double *skewness,ExceptionInfo *exception) |
| { |
| CacheView |
| *image_view; |
| |
| double |
| area, |
| mean, |
| standard_deviation, |
| sum_squares, |
| sum_cubes, |
| sum_fourth_power; |
| |
| MagickBooleanType |
| status; |
| |
| ssize_t |
| y; |
| |
| assert(image != (Image *) NULL); |
| assert(image->signature == MagickSignature); |
| if (image->debug != MagickFalse) |
| (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename); |
| status=MagickTrue; |
| *kurtosis=0.0; |
| *skewness=0.0; |
| area=0.0; |
| mean=0.0; |
| standard_deviation=0.0; |
| sum_squares=0.0; |
| sum_cubes=0.0; |
| sum_fourth_power=0.0; |
| image_view=AcquireCacheView(image); |
| #if defined(MAGICKCORE_OPENMP_SUPPORT) |
| #pragma omp parallel for schedule(dynamic) shared(status) omp_throttle(1) |
| #endif |
| for (y=0; y < (ssize_t) image->rows; y++) |
| { |
| register const Quantum |
| *restrict p; |
| |
| register ssize_t |
| x; |
| |
| if (status == MagickFalse) |
| continue; |
| p=GetCacheViewVirtualPixels(image_view,0,y,image->columns,1,exception); |
| if (p == (const Quantum *) NULL) |
| { |
| status=MagickFalse; |
| continue; |
| } |
| for (x=0; x < (ssize_t) image->columns; x++) |
| { |
| register ssize_t |
| i; |
| |
| for (i=0; i < (ssize_t) GetPixelChannels(image); i++) |
| { |
| PixelTrait |
| traits; |
| |
| traits=GetPixelChannelMapTraits(image,(PixelChannel) i); |
| if (traits == UndefinedPixelTrait) |
| continue; |
| if ((traits & UpdatePixelTrait) == 0) |
| continue; |
| #if defined(MAGICKCORE_OPENMP_SUPPORT) |
| #pragma omp critical (MagickCore_GetImageKurtosis) |
| #endif |
| { |
| mean+=p[i]; |
| sum_squares+=(double) p[i]*p[i]; |
| sum_cubes+=(double) p[i]*p[i]*p[i]; |
| sum_fourth_power+=(double) p[i]*p[i]*p[i]*p[i]; |
| area++; |
| } |
| } |
| p+=GetPixelChannels(image); |
| } |
| } |
| image_view=DestroyCacheView(image_view); |
| if (area != 0.0) |
| { |
| mean/=area; |
| sum_squares/=area; |
| sum_cubes/=area; |
| sum_fourth_power/=area; |
| } |
| standard_deviation=sqrt(sum_squares-(mean*mean)); |
| if (standard_deviation != 0.0) |
| { |
| *kurtosis=sum_fourth_power-4.0*mean*sum_cubes+6.0*mean*mean*sum_squares- |
| 3.0*mean*mean*mean*mean; |
| *kurtosis/=standard_deviation*standard_deviation*standard_deviation* |
| standard_deviation; |
| *kurtosis-=3.0; |
| *skewness=sum_cubes-3.0*mean*sum_squares+2.0*mean*mean*mean; |
| *skewness/=standard_deviation*standard_deviation*standard_deviation; |
| } |
| return(status); |
| } |
| |
| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % G e t I m a g e R a n g e % |
| % % |
| % % |
| % % |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % |
| % GetImageRange() returns the range of one or more image channels. |
| % |
| % The format of the GetImageRange method is: |
| % |
| % MagickBooleanType GetImageRange(const Image *image,double *minima, |
| % double *maxima,ExceptionInfo *exception) |
| % |
| % A description of each parameter follows: |
| % |
| % o image: the image. |
| % |
| % o minima: the minimum value in the channel. |
| % |
| % o maxima: the maximum value in the channel. |
| % |
| % o exception: return any errors or warnings in this structure. |
| % |
| */ |
| MagickExport MagickBooleanType GetImageRange(const Image *image,double *minima, |
| double *maxima,ExceptionInfo *exception) |
| { |
| CacheView |
| *image_view; |
| |
| MagickBooleanType |
| status; |
| |
| ssize_t |
| y; |
| |
| assert(image != (Image *) NULL); |
| assert(image->signature == MagickSignature); |
| if (image->debug != MagickFalse) |
| (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename); |
| status=MagickTrue; |
| *maxima=(-MagickHuge); |
| *minima=MagickHuge; |
| image_view=AcquireCacheView(image); |
| #if defined(MAGICKCORE_OPENMP_SUPPORT) |
| #pragma omp parallel for schedule(dynamic) shared(status) omp_throttle(1) |
| #endif |
| for (y=0; y < (ssize_t) image->rows; y++) |
| { |
| register const Quantum |
| *restrict p; |
| |
| register ssize_t |
| x; |
| |
| if (status == MagickFalse) |
| continue; |
| p=GetCacheViewVirtualPixels(image_view,0,y,image->columns,1,exception); |
| if (p == (const Quantum *) NULL) |
| { |
| status=MagickFalse; |
| continue; |
| } |
| for (x=0; x < (ssize_t) image->columns; x++) |
| { |
| register ssize_t |
| i; |
| |
| for (i=0; i < (ssize_t) GetPixelChannels(image); i++) |
| { |
| PixelTrait |
| traits; |
| |
| traits=GetPixelChannelMapTraits(image,(PixelChannel) i); |
| if (traits == UndefinedPixelTrait) |
| continue; |
| if ((traits & UpdatePixelTrait) == 0) |
| continue; |
| #if defined(MAGICKCORE_OPENMP_SUPPORT) |
| #pragma omp critical (MagickCore_GetImageRange) |
| #endif |
| { |
| if (p[i] < *minima) |
| *minima=(double) p[i]; |
| if (p[i] > *maxima) |
| *maxima=(double) p[i]; |
| } |
| } |
| p+=GetPixelChannels(image); |
| } |
| } |
| image_view=DestroyCacheView(image_view); |
| return(status); |
| } |
| |
| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % G e t I m a g e S t a t i s t i c s % |
| % % |
| % % |
| % % |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % |
| % GetImageStatistics() returns statistics for each channel in the |
| % image. The statistics include the channel depth, its minima, maxima, mean, |
| % standard deviation, kurtosis and skewness. You can access the red channel |
| % mean, for example, like this: |
| % |
| % channel_statistics=GetImageStatistics(image,exception); |
| % red_mean=channel_statistics[RedPixelChannel].mean; |
| % |
| % Use MagickRelinquishMemory() to free the statistics buffer. |
| % |
| % The format of the GetImageStatistics method is: |
| % |
| % ChannelStatistics *GetImageStatistics(const Image *image, |
| % ExceptionInfo *exception) |
| % |
| % A description of each parameter follows: |
| % |
| % o image: the image. |
| % |
| % o exception: return any errors or warnings in this structure. |
| % |
| */ |
| |
| static size_t GetImageChannels(const Image *image) |
| { |
| register ssize_t |
| i; |
| |
| size_t |
| channels; |
| |
| channels=0; |
| for (i=0; i < (ssize_t) GetPixelChannels(image); i++) |
| { |
| PixelTrait |
| traits; |
| |
| traits=GetPixelChannelMapTraits(image,(PixelChannel) i); |
| if ((traits & UpdatePixelTrait) != 0) |
| channels++; |
| } |
| return(channels); |
| } |
| |
| MagickExport ChannelStatistics *GetImageStatistics(const Image *image, |
| ExceptionInfo *exception) |
| { |
| ChannelStatistics |
| *channel_statistics; |
| |
| double |
| area; |
| |
| MagickStatusType |
| status; |
| |
| QuantumAny |
| range; |
| |
| register ssize_t |
| i; |
| |
| size_t |
| channels, |
| depth; |
| |
| ssize_t |
| y; |
| |
| assert(image != (Image *) NULL); |
| assert(image->signature == MagickSignature); |
| if (image->debug != MagickFalse) |
| (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename); |
| channel_statistics=(ChannelStatistics *) AcquireQuantumMemory( |
| MaxPixelChannels+1,sizeof(*channel_statistics)); |
| if (channel_statistics == (ChannelStatistics *) NULL) |
| ThrowFatalException(ResourceLimitFatalError,"MemoryAllocationFailed"); |
| (void) ResetMagickMemory(channel_statistics,0,(MaxPixelChannels+1)* |
| sizeof(*channel_statistics)); |
| for (i=0; i <= (ssize_t) MaxPixelChannels; i++) |
| { |
| channel_statistics[i].depth=1; |
| channel_statistics[i].maxima=(-MagickHuge); |
| channel_statistics[i].minima=MagickHuge; |
| } |
| for (y=0; y < (ssize_t) image->rows; y++) |
| { |
| register const Quantum |
| *restrict p; |
| |
| register ssize_t |
| x; |
| |
| p=GetVirtualPixels(image,0,y,image->columns,1,exception); |
| if (p == (const Quantum *) NULL) |
| break; |
| for (x=0; x < (ssize_t) image->columns; x++) |
| { |
| register ssize_t |
| i; |
| |
| for (i=0; i < (ssize_t) GetPixelChannels(image); i++) |
| { |
| PixelTrait |
| traits; |
| |
| traits=GetPixelChannelMapTraits(image,(PixelChannel) i); |
| if (traits == UndefinedPixelTrait) |
| continue; |
| if (channel_statistics[i].depth != MAGICKCORE_QUANTUM_DEPTH) |
| { |
| depth=channel_statistics[i].depth; |
| range=GetQuantumRange(depth); |
| status=p[i] != ScaleAnyToQuantum(ScaleQuantumToAny(p[i],range), |
| range) ? MagickTrue : MagickFalse; |
| if (status != MagickFalse) |
| { |
| channel_statistics[i].depth++; |
| continue; |
| } |
| } |
| if ((double) p[i] < channel_statistics[i].minima) |
| channel_statistics[i].minima=(double) p[i]; |
| if ((double) p[i] > channel_statistics[i].maxima) |
| channel_statistics[i].maxima=(double) p[i]; |
| channel_statistics[i].sum+=p[i]; |
| channel_statistics[i].sum_squared+=(double) p[i]*p[i]; |
| channel_statistics[i].sum_cubed+=(double) p[i]*p[i]*p[i]; |
| channel_statistics[i].sum_fourth_power+=(double) p[i]*p[i]*p[i]*p[i]; |
| } |
| p+=GetPixelChannels(image); |
| } |
| } |
| area=(double) image->columns*image->rows; |
| for (i=0; i < (ssize_t) MaxPixelChannels; i++) |
| { |
| channel_statistics[i].sum/=area; |
| channel_statistics[i].sum_squared/=area; |
| channel_statistics[i].sum_cubed/=area; |
| channel_statistics[i].sum_fourth_power/=area; |
| channel_statistics[i].mean=channel_statistics[i].sum; |
| channel_statistics[i].variance=channel_statistics[i].sum_squared; |
| channel_statistics[i].standard_deviation=sqrt( |
| channel_statistics[i].variance-(channel_statistics[i].mean* |
| channel_statistics[i].mean)); |
| } |
| for (i=0; i < (ssize_t) MaxPixelChannels; i++) |
| { |
| channel_statistics[MaxPixelChannels].depth=(size_t) MagickMax((double) |
| channel_statistics[MaxPixelChannels].depth,(double) |
| channel_statistics[i].depth); |
| channel_statistics[MaxPixelChannels].minima=MagickMin( |
| channel_statistics[MaxPixelChannels].minima, |
| channel_statistics[i].minima); |
| channel_statistics[MaxPixelChannels].maxima=MagickMax( |
| channel_statistics[MaxPixelChannels].maxima, |
| channel_statistics[i].maxima); |
| channel_statistics[MaxPixelChannels].sum+=channel_statistics[i].sum; |
| channel_statistics[MaxPixelChannels].sum_squared+= |
| channel_statistics[i].sum_squared; |
| channel_statistics[MaxPixelChannels].sum_cubed+= |
| channel_statistics[i].sum_cubed; |
| channel_statistics[MaxPixelChannels].sum_fourth_power+= |
| channel_statistics[i].sum_fourth_power; |
| channel_statistics[MaxPixelChannels].mean+=channel_statistics[i].mean; |
| channel_statistics[MaxPixelChannels].variance+= |
| channel_statistics[i].variance-channel_statistics[i].mean* |
| channel_statistics[i].mean; |
| channel_statistics[MaxPixelChannels].standard_deviation+= |
| channel_statistics[i].variance-channel_statistics[i].mean* |
| channel_statistics[i].mean; |
| } |
| channels=GetImageChannels(image); |
| channel_statistics[MaxPixelChannels].sum/=channels; |
| channel_statistics[MaxPixelChannels].sum_squared/=channels; |
| channel_statistics[MaxPixelChannels].sum_cubed/=channels; |
| channel_statistics[MaxPixelChannels].sum_fourth_power/=channels; |
| channel_statistics[MaxPixelChannels].mean/=channels; |
| channel_statistics[MaxPixelChannels].variance/=channels; |
| channel_statistics[MaxPixelChannels].standard_deviation= |
| sqrt(channel_statistics[MaxPixelChannels].standard_deviation/channels); |
| channel_statistics[MaxPixelChannels].kurtosis/=channels; |
| channel_statistics[MaxPixelChannels].skewness/=channels; |
| for (i=0; i <= (ssize_t) MaxPixelChannels; i++) |
| { |
| if (channel_statistics[i].standard_deviation == 0.0) |
| continue; |
| channel_statistics[i].skewness=(channel_statistics[i].sum_cubed- |
| 3.0*channel_statistics[i].mean*channel_statistics[i].sum_squared+ |
| 2.0*channel_statistics[i].mean*channel_statistics[i].mean* |
| channel_statistics[i].mean)/(channel_statistics[i].standard_deviation* |
| channel_statistics[i].standard_deviation* |
| channel_statistics[i].standard_deviation); |
| channel_statistics[i].kurtosis=(channel_statistics[i].sum_fourth_power- |
| 4.0*channel_statistics[i].mean*channel_statistics[i].sum_cubed+ |
| 6.0*channel_statistics[i].mean*channel_statistics[i].mean* |
| channel_statistics[i].sum_squared-3.0*channel_statistics[i].mean* |
| channel_statistics[i].mean*1.0*channel_statistics[i].mean* |
| channel_statistics[i].mean)/(channel_statistics[i].standard_deviation* |
| channel_statistics[i].standard_deviation* |
| channel_statistics[i].standard_deviation* |
| channel_statistics[i].standard_deviation)-3.0; |
| } |
| return(channel_statistics); |
| } |