]> granicus.if.org Git - imagemagick/blobdiff - MagickCore/effect.c
(no commit message)
[imagemagick] / MagickCore / effect.c
index 7af9b83c31c9089b632b6fe599758d01c4684e15..21810c64b72bcfed634347f22088d5aa9bed44eb 100644 (file)
@@ -17,7 +17,7 @@
 %                                 October 1996                                %
 %                                                                             %
 %                                                                             %
-%  Copyright 1999-2012 ImageMagick Studio LLC, a non-profit organization      %
+%  Copyright 1999-2013 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  %
@@ -180,6 +180,9 @@ MagickExport Image *AdaptiveBlurImage(const Image *image,const double radius,
     *edge_view,
     *image_view;
 
+  double
+    normalize;
+
   Image
     *blur_image,
     *edge_image,
@@ -192,8 +195,7 @@ MagickExport Image *AdaptiveBlurImage(const Image *image,const double radius,
     progress;
 
   MagickRealType
-    **kernel,
-    normalize;
+    **kernel;
 
   register ssize_t
     i;
@@ -275,7 +277,7 @@ MagickExport Image *AdaptiveBlurImage(const Image *image,const double radius,
     }
     if (fabs(normalize) < MagickEpsilon)
       normalize=MagickEpsilon;
-    normalize=MagickEpsilonReciprocal(normalize);
+    normalize=PerceptibleReciprocal(normalize);
     for (k=0; k < (j*j); k++)
       kernel[i][k]=normalize*kernel[i][k];
   }
@@ -298,7 +300,7 @@ MagickExport Image *AdaptiveBlurImage(const Image *image,const double radius,
   blur_view=AcquireAuthenticCacheView(blur_image,exception);
 #if defined(MAGICKCORE_OPENMP_SUPPORT)
   #pragma omp parallel for schedule(static,4) shared(progress,status) \
-    dynamic_number_threads(image,image->columns,image->rows,1)
+    magick_threads(image,blur_image,blur_image->rows,1)
 #endif
   for (y=0; y < (ssize_t) blur_image->rows; y++)
   {
@@ -355,13 +357,6 @@ MagickExport Image *AdaptiveBlurImage(const Image *image,const double radius,
           gamma,
           pixel;
 
-        PixelChannel
-          channel;
-
-        PixelTrait
-          blur_traits,
-          traits;
-
         register const MagickRealType
           *restrict k;
 
@@ -374,9 +369,9 @@ MagickExport Image *AdaptiveBlurImage(const Image *image,const double radius,
         ssize_t
           v;
 
-        channel=GetPixelChannelChannel(image,i);
-        traits=GetPixelChannelTraits(image,channel);
-        blur_traits=GetPixelChannelTraits(blur_image,channel);
+        PixelChannel channel=GetPixelChannelChannel(image,i);
+        PixelTrait traits=GetPixelChannelTraits(image,channel);
+        PixelTrait blur_traits=GetPixelChannelTraits(blur_image,channel);
         if ((traits == UndefinedPixelTrait) ||
             (blur_traits == UndefinedPixelTrait))
           continue;
@@ -390,7 +385,7 @@ MagickExport Image *AdaptiveBlurImage(const Image *image,const double radius,
         pixels=p;
         pixel=0.0;
         gamma=0.0;
-        if ((blur_traits & BlendPixelTrait) == 0)
+        if ((GetPixelAlphaTraits(blur_image) & BlendPixelTrait) == 0)
           {
             /*
               No alpha blending.
@@ -405,7 +400,7 @@ MagickExport Image *AdaptiveBlurImage(const Image *image,const double radius,
                 pixels+=GetPixelChannels(image);
               }
             }
-            gamma=MagickEpsilonReciprocal(gamma);
+            gamma=PerceptibleReciprocal(gamma);
             SetPixelChannel(blur_image,channel,ClampToQuantum(gamma*pixel),q);
             continue;
           }
@@ -423,7 +418,7 @@ MagickExport Image *AdaptiveBlurImage(const Image *image,const double radius,
             pixels+=GetPixelChannels(image);
           }
         }
-        gamma=MagickEpsilonReciprocal(gamma);
+        gamma=PerceptibleReciprocal(gamma);
         SetPixelChannel(blur_image,channel,ClampToQuantum(gamma*pixel),q);
       }
       q+=GetPixelChannels(blur_image);
@@ -503,6 +498,9 @@ MagickExport Image *AdaptiveSharpenImage(const Image *image,const double radius,
     *edge_view,
     *image_view;
 
+  double
+    normalize;
+
   Image
     *sharp_image,
     *edge_image,
@@ -515,8 +513,7 @@ MagickExport Image *AdaptiveSharpenImage(const Image *image,const double radius,
     progress;
 
   MagickRealType
-    **kernel,
-    normalize;
+    **kernel;
 
   register ssize_t
     i;
@@ -598,7 +595,7 @@ MagickExport Image *AdaptiveSharpenImage(const Image *image,const double radius,
     }
     if (fabs(normalize) < MagickEpsilon)
       normalize=MagickEpsilon;
-    normalize=MagickEpsilonReciprocal(normalize);
+    normalize=PerceptibleReciprocal(normalize);
     for (k=0; k < (j*j); k++)
       kernel[i][k]=normalize*kernel[i][k];
   }
@@ -621,7 +618,7 @@ MagickExport Image *AdaptiveSharpenImage(const Image *image,const double radius,
   sharp_view=AcquireAuthenticCacheView(sharp_image,exception);
 #if defined(MAGICKCORE_OPENMP_SUPPORT)
   #pragma omp parallel for schedule(static,4) shared(progress,status) \
-    dynamic_number_threads(image,image->columns,image->rows,1)
+    magick_threads(image,sharp_image,sharp_image->rows,1)
 #endif
   for (y=0; y < (ssize_t) sharp_image->rows; y++)
   {
@@ -678,13 +675,6 @@ MagickExport Image *AdaptiveSharpenImage(const Image *image,const double radius,
           gamma,
           pixel;
 
-        PixelChannel
-          channel;
-
-        PixelTrait
-          sharp_traits,
-          traits;
-
         register const MagickRealType
           *restrict k;
 
@@ -697,9 +687,9 @@ MagickExport Image *AdaptiveSharpenImage(const Image *image,const double radius,
         ssize_t
           v;
 
-        channel=GetPixelChannelChannel(image,i);
-        traits=GetPixelChannelTraits(image,channel);
-        sharp_traits=GetPixelChannelTraits(sharp_image,channel);
+        PixelChannel channel=GetPixelChannelChannel(image,i);
+        PixelTrait traits=GetPixelChannelTraits(image,channel);
+        PixelTrait sharp_traits=GetPixelChannelTraits(sharp_image,channel);
         if ((traits == UndefinedPixelTrait) ||
             (sharp_traits == UndefinedPixelTrait))
           continue;
@@ -713,7 +703,7 @@ MagickExport Image *AdaptiveSharpenImage(const Image *image,const double radius,
         pixels=p;
         pixel=0.0;
         gamma=0.0;
-        if ((sharp_traits & BlendPixelTrait) == 0)
+        if ((GetPixelAlphaTraits(sharp_image) & BlendPixelTrait) == 0)
           {
             /*
               No alpha blending.
@@ -728,7 +718,7 @@ MagickExport Image *AdaptiveSharpenImage(const Image *image,const double radius,
                 pixels+=GetPixelChannels(image);
               }
             }
-            gamma=MagickEpsilonReciprocal(gamma);
+            gamma=PerceptibleReciprocal(gamma);
             SetPixelChannel(sharp_image,channel,ClampToQuantum(gamma*pixel),q);
             continue;
           }
@@ -746,7 +736,7 @@ MagickExport Image *AdaptiveSharpenImage(const Image *image,const double radius,
             pixels+=GetPixelChannels(image);
           }
         }
-        gamma=MagickEpsilonReciprocal(gamma);
+        gamma=PerceptibleReciprocal(gamma);
         SetPixelChannel(sharp_image,channel,ClampToQuantum(gamma*pixel),q);
       }
       q+=GetPixelChannels(sharp_image);
@@ -821,10 +811,12 @@ MagickExport Image *AdaptiveSharpenImage(const Image *image,const double radius,
 
 static MagickRealType *GetBlurKernel(const size_t width,const double sigma)
 {
-  MagickRealType
-    *kernel,
+  double
     normalize;
 
+  MagickRealType
+    *kernel;
+
   register ssize_t
     i;
 
@@ -896,7 +888,7 @@ MagickExport Image *BlurImage(const Image *image,const double radius,
     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
   assert(exception != (ExceptionInfo *) NULL);
   assert(exception->signature == MagickSignature);
-  blur_image=CloneImage(image,0,0,MagickTrue,exception);
+  blur_image=CloneImage(image,image->columns,image->rows,MagickTrue,exception);
   if (blur_image == (Image *) NULL)
     return((Image *) NULL);
   if (fabs(sigma) < MagickEpsilon)
@@ -947,7 +939,7 @@ MagickExport Image *BlurImage(const Image *image,const double radius,
   blur_view=AcquireAuthenticCacheView(blur_image,exception);
 #if defined(MAGICKCORE_OPENMP_SUPPORT)
   #pragma omp parallel for schedule(static,4) shared(progress,status) \
-    dynamic_number_threads(image,image->columns,image->rows,1)
+    magick_threads(image,blur_image,image->rows,1)
 #endif
   for (y=0; y < (ssize_t) image->rows; y++)
   {
@@ -983,13 +975,6 @@ MagickExport Image *BlurImage(const Image *image,const double radius,
           gamma,
           pixel;
 
-        PixelChannel
-          channel;
-
-        PixelTrait
-          blur_traits,
-          traits;
-
         register const MagickRealType
           *restrict k;
 
@@ -999,9 +984,9 @@ MagickExport Image *BlurImage(const Image *image,const double radius,
         register ssize_t
           u;
 
-        channel=GetPixelChannelChannel(image,i);
-        traits=GetPixelChannelTraits(image,channel);
-        blur_traits=GetPixelChannelTraits(blur_image,channel);
+        PixelChannel channel=GetPixelChannelChannel(image,i);
+        PixelTrait traits=GetPixelChannelTraits(image,channel);
+        PixelTrait blur_traits=GetPixelChannelTraits(blur_image,channel);
         if ((traits == UndefinedPixelTrait) ||
             (blur_traits == UndefinedPixelTrait))
           continue;
@@ -1014,7 +999,7 @@ MagickExport Image *BlurImage(const Image *image,const double radius,
         k=kernel;
         pixels=p;
         pixel=0.0;
-        if ((blur_traits & BlendPixelTrait) == 0)
+        if ((GetPixelAlphaTraits(blur_image) & BlendPixelTrait) == 0)
           {
             /*
               No alpha blending.
@@ -1040,7 +1025,7 @@ MagickExport Image *BlurImage(const Image *image,const double radius,
           k++;
           pixels+=GetPixelChannels(image);
         }
-        gamma=MagickEpsilonReciprocal(gamma);
+        gamma=PerceptibleReciprocal(gamma);
         SetPixelChannel(blur_image,channel,ClampToQuantum(gamma*pixel),q);
       }
       p+=GetPixelChannels(image);
@@ -1072,7 +1057,7 @@ MagickExport Image *BlurImage(const Image *image,const double radius,
   blur_view=AcquireAuthenticCacheView(blur_image,exception);
 #if defined(MAGICKCORE_OPENMP_SUPPORT)
   #pragma omp parallel for schedule(static,4) shared(progress,status) \
-    dynamic_number_threads(image,image->columns,image->rows,1)
+    magick_threads(blur_image,blur_image,blur_image->columns,1)
 #endif
   for (x=0; x < (ssize_t) blur_image->columns; x++)
   {
@@ -1107,13 +1092,6 @@ MagickExport Image *BlurImage(const Image *image,const double radius,
           gamma,
           pixel;
 
-        PixelChannel
-          channel;
-
-        PixelTrait
-          blur_traits,
-          traits;
-
         register const MagickRealType
           *restrict k;
 
@@ -1123,14 +1101,14 @@ MagickExport Image *BlurImage(const Image *image,const double radius,
         register ssize_t
           u;
 
-        channel=GetPixelChannelChannel(blur_image,i);
-        traits=GetPixelChannelTraits(blur_image,channel);
-        blur_traits=GetPixelChannelTraits(blur_image,channel);
+        PixelChannel channel=GetPixelChannelChannel(blur_image,i);
+        PixelTrait traits=GetPixelChannelTraits(blur_image,channel);
+        PixelTrait blur_traits=GetPixelChannelTraits(blur_image,channel);
         if ((traits == UndefinedPixelTrait) ||
             (blur_traits == UndefinedPixelTrait))
           continue;
         if (((blur_traits & CopyPixelTrait) != 0) ||
-            (GetPixelMask(image,p) != 0))
+            (GetPixelMask(blur_image,p) != 0))
           {
             SetPixelChannel(blur_image,channel,p[center+i],q);
             continue;
@@ -1138,7 +1116,7 @@ MagickExport Image *BlurImage(const Image *image,const double radius,
         k=kernel;
         pixels=p;
         pixel=0.0;
-        if ((blur_traits & BlendPixelTrait) == 0)
+        if ((GetPixelAlphaTraits(blur_image) & BlendPixelTrait) == 0)
           {
             /*
               No alpha blending.
@@ -1158,14 +1136,13 @@ MagickExport Image *BlurImage(const Image *image,const double radius,
         gamma=0.0;
         for (u=0; u < (ssize_t) width; u++)
         {
-          alpha=(double) (QuantumScale*GetPixelAlpha(blur_image,
-            pixels));
+          alpha=(double) (QuantumScale*GetPixelAlpha(blur_image,pixels));
           pixel+=(*k)*alpha*pixels[i];
           gamma+=(*k)*alpha;
           k++;
           pixels+=GetPixelChannels(blur_image);
         }
-        gamma=MagickEpsilonReciprocal(gamma);
+        gamma=PerceptibleReciprocal(gamma);
         SetPixelChannel(blur_image,channel,ClampToQuantum(gamma*pixel),q);
       }
       p+=GetPixelChannels(blur_image);
@@ -1277,24 +1254,24 @@ static void Hull(const Image *image,const ssize_t x_offset,
   q=g+(columns+2);
   r=p+(y_offset*(columns+2)+x_offset);
 #if defined(MAGICKCORE_OPENMP_SUPPORT)
-  #pragma omp parallel for schedule(static) \
-    dynamic_number_threads(image,columns,rows,1)
+  #pragma omp parallel for schedule(static,4) \
+    magick_threads(image,image,1,1)
 #endif
   for (y=0; y < (ssize_t) rows; y++)
   {
+    MagickRealType
+      v;
+
     register ssize_t
       i,
       x;
 
-    SignedQuantum
-      v;
-
     i=(2*y+1)+y*columns;
     if (polarity > 0)
       for (x=0; x < (ssize_t) columns; x++)
       {
-        v=(SignedQuantum) p[i];
-        if ((SignedQuantum) r[i] >= (v+ScaleCharToQuantum(2)))
+        v=(MagickRealType) p[i];
+        if ((MagickRealType) r[i] >= (v+ScaleCharToQuantum(2)))
           v+=ScaleCharToQuantum(1);
         q[i]=(Quantum) v;
         i++;
@@ -1302,8 +1279,8 @@ static void Hull(const Image *image,const ssize_t x_offset,
     else
       for (x=0; x < (ssize_t) columns; x++)
       {
-        v=(SignedQuantum) p[i];
-        if ((SignedQuantum) r[i] <= (v-ScaleCharToQuantum(2)))
+        v=(MagickRealType) p[i];
+        if ((MagickRealType) r[i] <= (v-ScaleCharToQuantum(2)))
           v-=ScaleCharToQuantum(1);
         q[i]=(Quantum) v;
         i++;
@@ -1314,8 +1291,8 @@ static void Hull(const Image *image,const ssize_t x_offset,
   r=q+(y_offset*(columns+2)+x_offset);
   s=q-(y_offset*(columns+2)+x_offset);
 #if defined(MAGICKCORE_OPENMP_SUPPORT)
-  #pragma omp parallel for schedule(static) \
-    dynamic_number_threads(image,columns,rows,1)
+  #pragma omp parallel for schedule(static,4) \
+    magick_threads(image,image,1,1)
 #endif
   for (y=0; y < (ssize_t) rows; y++)
   {
@@ -1323,16 +1300,16 @@ static void Hull(const Image *image,const ssize_t x_offset,
       i,
       x;
 
-    SignedQuantum
+    MagickRealType
       v;
 
     i=(2*y+1)+y*columns;
     if (polarity > 0)
       for (x=0; x < (ssize_t) columns; x++)
       {
-        v=(SignedQuantum) q[i];
-        if (((SignedQuantum) s[i] >= (v+ScaleCharToQuantum(2))) &&
-            ((SignedQuantum) r[i] > v))
+        v=(MagickRealType) q[i];
+        if (((MagickRealType) s[i] >= (v+ScaleCharToQuantum(2))) &&
+            ((MagickRealType) r[i] > v))
           v+=ScaleCharToQuantum(1);
         p[i]=(Quantum) v;
         i++;
@@ -1340,9 +1317,9 @@ static void Hull(const Image *image,const ssize_t x_offset,
     else
       for (x=0; x < (ssize_t) columns; x++)
       {
-        v=(SignedQuantum) q[i];
-        if (((SignedQuantum) s[i] <= (v-ScaleCharToQuantum(2))) &&
-            ((SignedQuantum) r[i] < v))
+        v=(MagickRealType) q[i];
+        if (((MagickRealType) s[i] <= (v-ScaleCharToQuantum(2))) &&
+            ((MagickRealType) r[i] < v))
           v-=ScaleCharToQuantum(1);
         p[i]=(Quantum) v;
         i++;
@@ -1419,13 +1396,6 @@ MagickExport Image *DespeckleImage(const Image *image,ExceptionInfo *exception)
   despeckle_view=AcquireAuthenticCacheView(despeckle_image,exception);
   for (i=0; i < (ssize_t) GetPixelChannels(image); i++)
   {
-    PixelChannel
-       channel;
-
-    PixelTrait
-      despeckle_traits,
-      traits;
-
     register ssize_t
       k,
       x;
@@ -1434,16 +1404,16 @@ MagickExport Image *DespeckleImage(const Image *image,ExceptionInfo *exception)
       j,
       y;
 
-    if (status == MagickFalse)
-      continue;
-    channel=GetPixelChannelChannel(image,i);
-    traits=GetPixelChannelTraits(image,channel);
-    despeckle_traits=GetPixelChannelTraits(despeckle_image,channel);
+    PixelChannel channel=GetPixelChannelChannel(image,i);
+    PixelTrait traits=GetPixelChannelTraits(image,channel);
+    PixelTrait despeckle_traits=GetPixelChannelTraits(despeckle_image,channel);
     if ((traits == UndefinedPixelTrait) ||
         (despeckle_traits == UndefinedPixelTrait))
       continue;
     if ((despeckle_traits & CopyPixelTrait) != 0)
       continue;
+    if (status == MagickFalse)
+      continue;
     (void) ResetMagickMemory(pixels,0,length*sizeof(*pixels));
     j=(ssize_t) image->columns+2;
     for (y=0; y < (ssize_t) image->rows; y++)
@@ -1482,8 +1452,8 @@ MagickExport Image *DespeckleImage(const Image *image,ExceptionInfo *exception)
       register Quantum
         *restrict q;
 
-      q=QueueCacheViewAuthenticPixels(despeckle_view,0,y,
-        despeckle_image->columns,1,exception);
+      q=GetCacheViewAuthenticPixels(despeckle_view,0,y,despeckle_image->columns,
+        1,exception);
       if (q == (Quantum *) NULL)
         {
           status=MagickFalse;
@@ -1584,6 +1554,8 @@ MagickExport Image *EdgeImage(const Image *image,const double radius,
     ThrowImageException(ResourceLimitError,"MemoryAllocationFailed");
   kernel_info->width=width;
   kernel_info->height=width;
+  kernel_info->x=(ssize_t) width/2;
+  kernel_info->y=(ssize_t) width/2;
   kernel_info->values=(MagickRealType *) MagickAssumeAligned(
     AcquireAlignedMemory(kernel_info->width,kernel_info->width*
     sizeof(*kernel_info->values)));
@@ -1604,8 +1576,6 @@ MagickExport Image *EdgeImage(const Image *image,const double radius,
   }
   kernel_info->values[i/2]=(MagickRealType) (width*width-1.0);
   edge_image=ConvolveImage(image,kernel_info,exception);
-  if (edge_image != (Image *) NULL)
-    (void) ClampImage(edge_image,exception);
   kernel_info=DestroyKernelInfo(kernel_info);
   return(edge_image);
 }
@@ -1676,6 +1646,8 @@ MagickExport Image *EmbossImage(const Image *image,const double radius,
     ThrowImageException(ResourceLimitError,"MemoryAllocationFailed");
   kernel_info->width=width;
   kernel_info->height=width;
+  kernel_info->x=(ssize_t) width/2;
+  kernel_info->y=(ssize_t) width/2;
   kernel_info->values=(MagickRealType *) MagickAssumeAligned(
     AcquireAlignedMemory(kernel_info->width,kernel_info->width*
     sizeof(*kernel_info->values)));
@@ -1773,6 +1745,8 @@ MagickExport Image *GaussianBlurImage(const Image *image,const double radius,
   (void) ResetMagickMemory(kernel_info,0,sizeof(*kernel_info));
   kernel_info->width=width;
   kernel_info->height=width;
+  kernel_info->x=(ssize_t) width/2;
+  kernel_info->y=(ssize_t) width/2;
   kernel_info->signature=MagickSignature;
   kernel_info->values=(MagickRealType *) MagickAssumeAligned(
     AcquireAlignedMemory(kernel_info->width,kernel_info->width*
@@ -1948,7 +1922,7 @@ MagickExport Image *MotionBlurImage(const Image *image,const double radius,
   blur_view=AcquireAuthenticCacheView(blur_image,exception);
 #if defined(MAGICKCORE_OPENMP_SUPPORT)
   #pragma omp parallel for schedule(static,4) shared(progress,status) \
-    dynamic_number_threads(image,image->columns,image->rows,1)
+    magick_threads(image,blur_image,image->rows,1)
 #endif
   for (y=0; y < (ssize_t) image->rows; y++)
   {
@@ -1983,13 +1957,6 @@ MagickExport Image *MotionBlurImage(const Image *image,const double radius,
           gamma,
           pixel;
 
-        PixelChannel
-          channel;
-
-        PixelTrait
-          blur_traits,
-          traits;
-
         register const Quantum
           *restrict r;
 
@@ -1999,9 +1966,9 @@ MagickExport Image *MotionBlurImage(const Image *image,const double radius,
         register ssize_t
           j;
 
-        channel=GetPixelChannelChannel(image,i);
-        traits=GetPixelChannelTraits(image,channel);
-        blur_traits=GetPixelChannelTraits(blur_image,channel);
+        PixelChannel channel=GetPixelChannelChannel(image,i);
+        PixelTrait traits=GetPixelChannelTraits(image,channel);
+        PixelTrait blur_traits=GetPixelChannelTraits(blur_image,channel);
         if ((traits == UndefinedPixelTrait) ||
             (blur_traits == UndefinedPixelTrait))
           continue;
@@ -2046,7 +2013,7 @@ MagickExport Image *MotionBlurImage(const Image *image,const double radius,
           gamma+=(*k)*alpha;
           k++;
         }
-        gamma=MagickEpsilonReciprocal(gamma);
+        gamma=PerceptibleReciprocal(gamma);
         SetPixelChannel(blur_image,channel,ClampToQuantum(gamma*pixel),q);
       }
       p+=GetPixelChannels(image);
@@ -2210,8 +2177,8 @@ MagickExport Image *PreviewImage(const Image *image,const PreviewType preview,
       {
         degrees+=5.0;
         preview_image=ShearImage(thumbnail,degrees,degrees,exception);
-        (void) FormatLocaleString(label,MaxTextExtent,"shear %gx%g",
-          degrees,2.0*degrees);
+        (void) FormatLocaleString(label,MaxTextExtent,"shear %gx%g",degrees,
+          2.0*degrees);
         break;
       }
       case RollPreview:
@@ -2228,8 +2195,8 @@ MagickExport Image *PreviewImage(const Image *image,const PreviewType preview,
         preview_image=CloneImage(thumbnail,0,0,MagickTrue,exception);
         if (preview_image == (Image *) NULL)
           break;
-        (void) FormatLocaleString(factor,MaxTextExtent,"100,100,%g",
-          2.0*percentage);
+        (void) FormatLocaleString(factor,MaxTextExtent,"100,100,%g",2.0*
+          percentage);
         (void) ModulateImage(preview_image,factor,exception);
         (void) FormatLocaleString(label,MaxTextExtent,"modulate %s",factor);
         break;
@@ -2239,8 +2206,7 @@ MagickExport Image *PreviewImage(const Image *image,const PreviewType preview,
         preview_image=CloneImage(thumbnail,0,0,MagickTrue,exception);
         if (preview_image == (Image *) NULL)
           break;
-        (void) FormatLocaleString(factor,MaxTextExtent,"100,%g",
-          2.0*percentage);
+        (void) FormatLocaleString(factor,MaxTextExtent,"100,%g",2.0*percentage);
         (void) ModulateImage(preview_image,factor,exception);
         (void) FormatLocaleString(label,MaxTextExtent,"modulate %s",factor);
         break;
@@ -2384,8 +2350,8 @@ MagickExport Image *PreviewImage(const Image *image,const PreviewType preview,
       case SharpenPreview:
       {
         preview_image=SharpenImage(thumbnail,radius,sigma,exception);
-        (void) FormatLocaleString(label,MaxTextExtent,"sharpen %gx%g",
-          radius,sigma);
+        (void) FormatLocaleString(label,MaxTextExtent,"sharpen %gx%g",radius,
+          sigma);
         break;
       }
       case BlurPreview:
@@ -2402,8 +2368,8 @@ MagickExport Image *PreviewImage(const Image *image,const PreviewType preview,
           break;
         (void) BilevelImage(thumbnail,(double) (percentage*((double)
           QuantumRange+1.0))/100.0,exception);
-        (void) FormatLocaleString(label,MaxTextExtent,"threshold %g",
-          (double) (percentage*((double) QuantumRange+1.0))/100.0);
+        (void) FormatLocaleString(label,MaxTextExtent,"threshold %g",(double)
+          (percentage*((double) QuantumRange+1.0))/100.0);
         break;
       }
       case EdgeDetectPreview:
@@ -2416,8 +2382,7 @@ MagickExport Image *PreviewImage(const Image *image,const PreviewType preview,
       {
         preview_image=SpreadImage(thumbnail,radius,thumbnail->interpolate,
           exception);
-        (void) FormatLocaleString(label,MaxTextExtent,"spread %g",
-          radius+0.5);
+        (void) FormatLocaleString(label,MaxTextExtent,"spread %g",radius+0.5);
         break;
       }
       case SolarizePreview:
@@ -2425,8 +2390,8 @@ MagickExport Image *PreviewImage(const Image *image,const PreviewType preview,
         preview_image=CloneImage(thumbnail,0,0,MagickTrue,exception);
         if (preview_image == (Image *) NULL)
           break;
-        (void) SolarizeImage(preview_image,(double) QuantumRange*
-          percentage/100.0,exception);
+        (void) SolarizeImage(preview_image,(double) QuantumRange*percentage/
+          100.0,exception);
         (void) FormatLocaleString(label,MaxTextExtent,"solarize %g",
           (QuantumRange*percentage)/100.0);
         break;
@@ -2436,8 +2401,8 @@ MagickExport Image *PreviewImage(const Image *image,const PreviewType preview,
         degrees+=10.0;
         preview_image=ShadeImage(thumbnail,MagickTrue,degrees,degrees,
           exception);
-        (void) FormatLocaleString(label,MaxTextExtent,"shade %gx%g",
-          degrees,degrees);
+        (void) FormatLocaleString(label,MaxTextExtent,"shade %gx%g",degrees,
+          degrees);
         break;
       }
       case RaisePreview:
@@ -2488,24 +2453,24 @@ MagickExport Image *PreviewImage(const Image *image,const PreviewType preview,
         degrees+=5.0f;
         preview_image=WaveImage(thumbnail,0.5*degrees,2.0*degrees,
           image->interpolate,exception);
-        (void) FormatLocaleString(label,MaxTextExtent,"wave %gx%g",
-          0.5*degrees,2.0*degrees);
+        (void) FormatLocaleString(label,MaxTextExtent,"wave %gx%g",0.5*degrees,
+          2.0*degrees);
         break;
       }
       case OilPaintPreview:
       {
         preview_image=OilPaintImage(thumbnail,(double) radius,(double) sigma,
           exception);
-        (void) FormatLocaleString(label,MaxTextExtent,"charcoal %gx%g",
-          radius,sigma);
+        (void) FormatLocaleString(label,MaxTextExtent,"charcoal %gx%g",radius,
+          sigma);
         break;
       }
       case CharcoalDrawingPreview:
       {
         preview_image=CharcoalImage(thumbnail,(double) radius,(double) sigma,
           exception);
-        (void) FormatLocaleString(label,MaxTextExtent,"charcoal %gx%g",
-          radius,sigma);
+        (void) FormatLocaleString(label,MaxTextExtent,"charcoal %gx%g",radius,
+          sigma);
         break;
       }
       case JPEGPreview:
@@ -2724,7 +2689,7 @@ MagickExport Image *RadialBlurImage(const Image *image,const double angle,
   blur_view=AcquireAuthenticCacheView(blur_image,exception);
 #if defined(MAGICKCORE_OPENMP_SUPPORT)
   #pragma omp parallel for schedule(static,4) shared(progress,status) \
-    dynamic_number_threads(image,image->columns,image->rows,1)
+    magick_threads(image,blur_image,image->rows,1)
 #endif
   for (y=0; y < (ssize_t) image->rows; y++)
   {
@@ -2781,22 +2746,15 @@ MagickExport Image *RadialBlurImage(const Image *image,const double angle,
           gamma,
           pixel;
 
-        PixelChannel
-          channel;
-
-        PixelTrait
-          blur_traits,
-          traits;
-
         register const Quantum
           *restrict r;
 
         register ssize_t
           j;
 
-        channel=GetPixelChannelChannel(image,i);
-        traits=GetPixelChannelTraits(image,channel);
-        blur_traits=GetPixelChannelTraits(blur_image,channel);
+        PixelChannel channel=GetPixelChannelChannel(image,i);
+        PixelTrait traits=GetPixelChannelTraits(image,channel);
+        PixelTrait blur_traits=GetPixelChannelTraits(blur_image,channel);
         if ((traits == UndefinedPixelTrait) ||
             (blur_traits == UndefinedPixelTrait))
           continue;
@@ -2824,7 +2782,7 @@ MagickExport Image *RadialBlurImage(const Image *image,const double angle,
               pixel+=r[i];
               gamma++;
             }
-            gamma=MagickEpsilonReciprocal(gamma);
+            gamma=PerceptibleReciprocal(gamma);
             SetPixelChannel(blur_image,channel,ClampToQuantum(gamma*pixel),q);
             continue;
           }
@@ -2842,7 +2800,7 @@ MagickExport Image *RadialBlurImage(const Image *image,const double angle,
           pixel+=GetPixelAlpha(image,r)*r[i];
           gamma+=GetPixelAlpha(image,r);
         }
-        gamma=MagickEpsilonReciprocal(gamma);
+        gamma=PerceptibleReciprocal(gamma);
         SetPixelChannel(blur_image,channel,ClampToQuantum(gamma*pixel),q);
       }
       p+=GetPixelChannels(image);
@@ -3034,7 +2992,7 @@ MagickExport Image *SelectiveBlurImage(const Image *image,const double radius,
   blur_view=AcquireAuthenticCacheView(blur_image,exception);
 #if defined(MAGICKCORE_OPENMP_SUPPORT)
   #pragma omp parallel for schedule(static,4) shared(progress,status) \
-    dynamic_number_threads(image,image->columns,image->rows,1)
+    magick_threads(image,blur_image,image->rows,1)
 #endif
   for (y=0; y < (ssize_t) image->rows; y++)
   {
@@ -3083,13 +3041,6 @@ MagickExport Image *SelectiveBlurImage(const Image *image,const double radius,
           gamma,
           pixel;
 
-        PixelChannel
-          channel;
-
-        PixelTrait
-          blur_traits,
-          traits;
-
         register const MagickRealType
           *restrict k;
 
@@ -3103,9 +3054,9 @@ MagickExport Image *SelectiveBlurImage(const Image *image,const double radius,
         ssize_t
           v;
 
-        channel=GetPixelChannelChannel(image,i);
-        traits=GetPixelChannelTraits(image,channel);
-        blur_traits=GetPixelChannelTraits(blur_image,channel);
+        PixelChannel channel=GetPixelChannelChannel(image,i);
+        PixelTrait traits=GetPixelChannelTraits(image,channel);
+        PixelTrait blur_traits=GetPixelChannelTraits(blur_image,channel);
         if ((traits == UndefinedPixelTrait) ||
             (blur_traits == UndefinedPixelTrait))
           continue;
@@ -3146,7 +3097,7 @@ MagickExport Image *SelectiveBlurImage(const Image *image,const double radius,
                 SetPixelChannel(blur_image,channel,p[center+i],q);
                 continue;
               }
-            gamma=MagickEpsilonReciprocal(gamma);
+            gamma=PerceptibleReciprocal(gamma);
             SetPixelChannel(blur_image,channel,ClampToQuantum(gamma*pixel),q);
             continue;
           }
@@ -3157,8 +3108,7 @@ MagickExport Image *SelectiveBlurImage(const Image *image,const double radius,
             contrast=GetPixelIntensity(image,pixels)-intensity;
             if (fabs(contrast) < threshold)
               {
-                alpha=(double) (QuantumScale*
-                  GetPixelAlpha(image,pixels));
+                alpha=(double) (QuantumScale*GetPixelAlpha(image,pixels));
                 pixel+=(*k)*alpha*pixels[i];
                 gamma+=(*k)*alpha;
               }
@@ -3175,7 +3125,7 @@ MagickExport Image *SelectiveBlurImage(const Image *image,const double radius,
             SetPixelChannel(blur_image,channel,p[center+i],q);
             continue;
           }
-        gamma=MagickEpsilonReciprocal(gamma);
+        gamma=PerceptibleReciprocal(gamma);
         SetPixelChannel(blur_image,channel,ClampToQuantum(gamma*pixel),q);
       }
       p+=GetPixelChannels(image);
@@ -3251,6 +3201,7 @@ MagickExport Image *ShadeImage(const Image *image,const MagickBooleanType gray,
     *shade_view;
 
   Image
+    *linear_image,
     *shade_image;
 
   MagickBooleanType
@@ -3274,11 +3225,21 @@ MagickExport Image *ShadeImage(const Image *image,const MagickBooleanType gray,
     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
   assert(exception != (ExceptionInfo *) NULL);
   assert(exception->signature == MagickSignature);
+  linear_image=CloneImage(image,0,0,MagickTrue,exception);
   shade_image=CloneImage(image,image->columns,image->rows,MagickTrue,exception);
-  if (shade_image == (Image *) NULL)
-    return((Image *) NULL);
+  if ((linear_image == (Image *) NULL) || (shade_image == (Image *) NULL))
+    {
+      if (linear_image != (Image *) NULL)
+        linear_image=DestroyImage(linear_image);
+      if (shade_image != (Image *) NULL)
+        shade_image=DestroyImage(shade_image);
+      return((Image *) NULL);
+    }
+  if (image->colorspace == sRGBColorspace)
+    (void) TransformImageColorspace(linear_image,RGBColorspace,exception);
   if (SetImageStorageClass(shade_image,DirectClass,exception) == MagickFalse)
     {
+      linear_image=DestroyImage(linear_image);
       shade_image=DestroyImage(shade_image);
       return((Image *) NULL);
     }
@@ -3295,13 +3256,13 @@ MagickExport Image *ShadeImage(const Image *image,const MagickBooleanType gray,
   */
   status=MagickTrue;
   progress=0;
-  image_view=AcquireVirtualCacheView(image,exception);
+  image_view=AcquireVirtualCacheView(linear_image,exception);
   shade_view=AcquireAuthenticCacheView(shade_image,exception);
 #if defined(MAGICKCORE_OPENMP_SUPPORT)
   #pragma omp parallel for schedule(static,4) shared(progress,status) \
-    dynamic_number_threads(image,image->columns,image->rows,1)
+    magick_threads(linear_image,shade_image,linear_image->rows,1)
 #endif
-  for (y=0; y < (ssize_t) image->rows; y++)
+  for (y=0; y < (ssize_t) linear_image->rows; y++)
   {
     double
       distance,
@@ -3325,7 +3286,8 @@ MagickExport Image *ShadeImage(const Image *image,const MagickBooleanType gray,
 
     if (status == MagickFalse)
       continue;
-    p=GetCacheViewVirtualPixels(image_view,-1,y-1,image->columns+2,3,exception);
+    p=GetCacheViewVirtualPixels(image_view,-1,y-1,linear_image->columns+2,3,
+      exception);
     q=QueueCacheViewAuthenticPixels(shade_view,0,y,shade_image->columns,1,
       exception);
     if ((p == (const Quantum *) NULL) || (q == (Quantum *) NULL))
@@ -3337,10 +3299,10 @@ MagickExport Image *ShadeImage(const Image *image,const MagickBooleanType gray,
       Shade this row of pixels.
     */
     normal.z=2.0*(double) QuantumRange;  /* constant Z of surface normal */
-    pre=p+GetPixelChannels(image);
-    center=pre+(image->columns+2)*GetPixelChannels(image);
-    post=center+(image->columns+2)*GetPixelChannels(image);
-    for (x=0; x < (ssize_t) image->columns; x++)
+    pre=p+GetPixelChannels(linear_image);
+    center=pre+(linear_image->columns+2)*GetPixelChannels(linear_image);
+    post=center+(linear_image->columns+2)*GetPixelChannels(linear_image);
+    for (x=0; x < (ssize_t) linear_image->columns; x++)
     {
       register ssize_t
         i;
@@ -3348,17 +3310,20 @@ MagickExport Image *ShadeImage(const Image *image,const MagickBooleanType gray,
       /*
         Determine the surface normal and compute shading.
       */
-      normal.x=(double) (GetPixelIntensity(image,pre-GetPixelChannels(image))+
-        GetPixelIntensity(image,center-GetPixelChannels(image))+
-        GetPixelIntensity(image,post-GetPixelChannels(image))-
-        GetPixelIntensity(image,pre+GetPixelChannels(image))-
-        GetPixelIntensity(image,center+GetPixelChannels(image))-
-        GetPixelIntensity(image,post+GetPixelChannels(image)));
-      normal.y=(double) (GetPixelIntensity(image,post-GetPixelChannels(image))+
-        GetPixelIntensity(image,post)+GetPixelIntensity(image,post+
-        GetPixelChannels(image))-GetPixelIntensity(image,pre-
-        GetPixelChannels(image))-GetPixelIntensity(image,pre)-
-        GetPixelIntensity(image,pre+GetPixelChannels(image)));
+      normal.x=(double) (
+        GetPixelIntensity(linear_image,pre-GetPixelChannels(linear_image))+
+        GetPixelIntensity(linear_image,center-GetPixelChannels(linear_image))+
+        GetPixelIntensity(linear_image,post-GetPixelChannels(linear_image))-
+        GetPixelIntensity(linear_image,pre+GetPixelChannels(linear_image))-
+        GetPixelIntensity(linear_image,center+GetPixelChannels(linear_image))-
+        GetPixelIntensity(linear_image,post+GetPixelChannels(linear_image)));
+      normal.y=(double) (
+        GetPixelIntensity(linear_image,post-GetPixelChannels(linear_image))+
+        GetPixelIntensity(linear_image,post)+
+        GetPixelIntensity(linear_image,post+GetPixelChannels(linear_image))-
+        GetPixelIntensity(linear_image,pre-GetPixelChannels(linear_image))-
+        GetPixelIntensity(linear_image,pre)-
+        GetPixelIntensity(linear_image,pre+GetPixelChannels(linear_image)));
       if ((normal.x == 0.0) && (normal.y == 0.0))
         shade=light.z;
       else
@@ -3367,29 +3332,22 @@ MagickExport Image *ShadeImage(const Image *image,const MagickBooleanType gray,
           distance=normal.x*light.x+normal.y*light.y+normal.z*light.z;
           if (distance > MagickEpsilon)
             {
-              normal_distance=
-                normal.x*normal.x+normal.y*normal.y+normal.z*normal.z;
+              normal_distance=normal.x*normal.x+normal.y*normal.y+
+                normal.z*normal.z;
               if (normal_distance > (MagickEpsilon*MagickEpsilon))
                 shade=distance/sqrt((double) normal_distance);
             }
         }
-      for (i=0; i < (ssize_t) GetPixelChannels(image); i++)
+      for (i=0; i < (ssize_t) GetPixelChannels(linear_image); i++)
       {
-        PixelChannel
-          channel;
-
-        PixelTrait
-          shade_traits,
-          traits;
-
-        channel=GetPixelChannelChannel(image,i);
-        traits=GetPixelChannelTraits(image,channel);
-        shade_traits=GetPixelChannelTraits(shade_image,channel);
+        PixelChannel channel=GetPixelChannelChannel(linear_image,i);
+        PixelTrait traits=GetPixelChannelTraits(linear_image,channel);
+        PixelTrait shade_traits=GetPixelChannelTraits(shade_image,channel);
         if ((traits == UndefinedPixelTrait) ||
             (shade_traits == UndefinedPixelTrait))
           continue;
         if (((shade_traits & CopyPixelTrait) != 0) ||
-            (GetPixelMask(image,p) != 0))
+            (GetPixelMask(linear_image,p) != 0))
           {
             SetPixelChannel(shade_image,channel,center[i],q);
             continue;
@@ -3402,9 +3360,9 @@ MagickExport Image *ShadeImage(const Image *image,const MagickBooleanType gray,
         SetPixelChannel(shade_image,channel,ClampToQuantum(QuantumScale*shade*
           center[i]),q);
       }
-      pre+=GetPixelChannels(image);
-      center+=GetPixelChannels(image);
-      post+=GetPixelChannels(image);
+      pre+=GetPixelChannels(linear_image);
+      center+=GetPixelChannels(linear_image);
+      post+=GetPixelChannels(linear_image);
       q+=GetPixelChannels(shade_image);
     }
     if (SyncCacheViewAuthenticPixels(shade_view,exception) == MagickFalse)
@@ -3424,6 +3382,9 @@ MagickExport Image *ShadeImage(const Image *image,const MagickBooleanType gray,
   }
   shade_view=DestroyCacheView(shade_view);
   image_view=DestroyCacheView(image_view);
+  linear_image=DestroyImage(linear_image);
+  if (image->colorspace == sRGBColorspace)
+    (void) TransformImageColorspace(shade_image,sRGBColorspace,exception);
   if (status == MagickFalse)
     shade_image=DestroyImage(shade_image);
   return(shade_image);
@@ -3503,6 +3464,8 @@ MagickExport Image *SharpenImage(const Image *image,const double radius,
   (void) ResetMagickMemory(kernel_info,0,sizeof(*kernel_info));
   kernel_info->width=width;
   kernel_info->height=width;
+  kernel_info->x=(ssize_t) width/2;
+  kernel_info->y=(ssize_t) width/2;
   kernel_info->signature=MagickSignature;
   kernel_info->values=(MagickRealType *) MagickAssumeAligned(
     AcquireAlignedMemory(kernel_info->width,kernel_info->width*
@@ -3527,8 +3490,6 @@ MagickExport Image *SharpenImage(const Image *image,const double radius,
   }
   kernel_info->values[i/2]=(double) ((-2.0)*normalize);
   sharp_image=ConvolveImage(image,kernel_info,exception);
-  if (sharp_image != (Image *) NULL)
-    (void) ClampImage(sharp_image,exception);
   kernel_info=DestroyKernelInfo(kernel_info);
   return(sharp_image);
 }
@@ -3590,8 +3551,10 @@ MagickExport Image *SpreadImage(const Image *image,const double radius,
   ssize_t
     y;
 
+#if defined(MAGICKCORE_OPENMP_SUPPORT)
   unsigned long
     key;
+#endif
 
   /*
     Initialize spread image attributes.
@@ -3618,12 +3581,12 @@ MagickExport Image *SpreadImage(const Image *image,const double radius,
   progress=0;
   width=GetOptimalKernelWidth1D(radius,0.5);
   random_info=AcquireRandomInfoThreadSet();
-  key=GetRandomSecretKey(random_info[0]);
   image_view=AcquireVirtualCacheView(image,exception);
   spread_view=AcquireAuthenticCacheView(spread_image,exception);
 #if defined(MAGICKCORE_OPENMP_SUPPORT)
+  key=GetRandomSecretKey(random_info[0]);
   #pragma omp parallel for schedule(static,4) shared(progress,status) \
-    dynamic_number_threads(image,image->columns,image->rows,key == ~0UL)
+    magick_threads(image,spread_image,image->rows,key == ~0UL)
 #endif
   for (y=0; y < (ssize_t) image->rows; y++)
   {
@@ -3678,6 +3641,8 @@ MagickExport Image *SpreadImage(const Image *image,const double radius,
   spread_view=DestroyCacheView(spread_view);
   image_view=DestroyCacheView(image_view);
   random_info=DestroyRandomInfoThreadSet(random_info);
+  if (status == MagickFalse)
+    spread_image=DestroyImage(spread_image);
   return(spread_image);
 }
 \f
@@ -3763,7 +3728,7 @@ MagickExport Image *UnsharpMaskImage(const Image *image,const double radius,
   unsharp_view=AcquireAuthenticCacheView(unsharp_image,exception);
 #if defined(MAGICKCORE_OPENMP_SUPPORT)
   #pragma omp parallel for schedule(static,4) shared(progress,status) \
-    dynamic_number_threads(image,image->columns,image->rows,1)
+    magick_threads(image,unsharp_image,image->rows,1)
 #endif
   for (y=0; y < (ssize_t) image->rows; y++)
   {
@@ -3796,16 +3761,9 @@ MagickExport Image *UnsharpMaskImage(const Image *image,const double radius,
         double
           pixel;
 
-        PixelChannel
-          channel;
-
-        PixelTrait
-          traits,
-          unsharp_traits;
-
-        channel=GetPixelChannelChannel(image,i);
-        traits=GetPixelChannelTraits(image,channel);
-        unsharp_traits=GetPixelChannelTraits(unsharp_image,channel);
+        PixelChannel channel=GetPixelChannelChannel(image,i);
+        PixelTrait traits=GetPixelChannelTraits(image,channel);
+        PixelTrait unsharp_traits=GetPixelChannelTraits(unsharp_image,channel);
         if ((traits == UndefinedPixelTrait) ||
             (unsharp_traits == UndefinedPixelTrait))
           continue;
@@ -3842,8 +3800,6 @@ MagickExport Image *UnsharpMaskImage(const Image *image,const double radius,
   }
   unsharp_image->type=image->type;
   unsharp_view=DestroyCacheView(unsharp_view);
-  if (unsharp_image != (Image *) NULL)
-    (void) ClampImage(unsharp_image,exception);
   image_view=DestroyCacheView(image_view);
   if (status == MagickFalse)
     unsharp_image=DestroyImage(unsharp_image);