diff --git a/MagickCore/accelerate.c b/MagickCore/accelerate.c
index 8395940..f952207 100644
--- a/MagickCore/accelerate.c
+++ b/MagickCore/accelerate.c
@@ -455,7 +455,7 @@
     filterHeight = (unsigned int) kernel->height;
     clStatus|=clEnv->library->clSetKernelArg(clkernel,i++,sizeof(unsigned int),(void *)&filterWidth);
     clStatus|=clEnv->library->clSetKernelArg(clkernel,i++,sizeof(unsigned int),(void *)&filterHeight);
-    matte = (image->alpha_trait==BlendPixelTrait)?1:0;
+    matte = (image->alpha_trait == UndefinedPixelTrait)?1:0;
     clStatus|=clEnv->library->clSetKernelArg(clkernel,i++,sizeof(unsigned int),(void *)&matte);
     clStatus|=clEnv->library->clSetKernelArg(clkernel,i++,sizeof(ChannelType),(void *)&channel);
     clStatus|=clEnv->library->clSetKernelArg(clkernel,i++, (localGroupSize[0] + kernel->width-1)*(localGroupSize[1] + kernel->height-1)*sizeof(CLPixelPacket),NULL);
@@ -501,7 +501,7 @@
     filterHeight = (unsigned int) kernel->height;
     clStatus|=clEnv->library->clSetKernelArg(clkernel,i++,sizeof(unsigned int),(void *)&filterWidth);
     clStatus|=clEnv->library->clSetKernelArg(clkernel,i++,sizeof(unsigned int),(void *)&filterHeight);
-    matte = (image->alpha_trait==BlendPixelTrait)?1:0;
+    matte = (image->alpha_trait == UndefinedPixelTrait)?1:0;
     clStatus|=clEnv->library->clSetKernelArg(clkernel,i++,sizeof(unsigned int),(void *)&matte);
     clStatus|=clEnv->library->clSetKernelArg(clkernel,i++,sizeof(ChannelType),(void *)&channel);
     if (clStatus != CL_SUCCESS)
@@ -1844,7 +1844,7 @@
   clStatus|=clEnv->library->clSetKernelArg(rotationalBlurKernel,i++,sizeof(cl_float4), &biasPixel);
   clStatus|=clEnv->library->clSetKernelArg(rotationalBlurKernel,i++,sizeof(ChannelType), &channel);
 
-  matte = (image->alpha_trait==BlendPixelTrait)?1:0;
+  matte = (image->alpha_trait == UndefinedPixelTrait)?1:0;
   clStatus|=clEnv->library->clSetKernelArg(rotationalBlurKernel,i++,sizeof(unsigned int), &matte);
 
   clStatus=clEnv->library->clSetKernelArg(rotationalBlurKernel,i++,sizeof(cl_float2), &blurCenter);
@@ -3660,14 +3660,14 @@
       goto cleanup;
     }
     
-    status = resizeHorizontalFilter(imageBuffer, (unsigned int) image->columns, (unsigned int) image->rows, (image->alpha_trait==BlendPixelTrait)?1:0
+    status = resizeHorizontalFilter(imageBuffer, (unsigned int) image->columns, (unsigned int) image->rows, (image->alpha_trait == UndefinedPixelTrait)?1:0
           , tempImageBuffer, (unsigned int) resizedColumns, (unsigned int) image->rows
           , resizeFilter, cubicCoefficientsBuffer
           , xFactor, clEnv, queue, exception);
     if (status != MagickTrue)
       goto cleanup;
     
-    status = resizeVerticalFilter(tempImageBuffer, (unsigned int) resizedColumns, (unsigned int) image->rows, (image->alpha_trait==BlendPixelTrait)?1:0
+    status = resizeVerticalFilter(tempImageBuffer, (unsigned int) resizedColumns, (unsigned int) image->rows, (image->alpha_trait == UndefinedPixelTrait)?1:0
        , filteredImageBuffer, (unsigned int) resizedColumns, (unsigned int) resizedRows
        , resizeFilter, cubicCoefficientsBuffer
        , yFactor, clEnv, queue, exception);
@@ -3684,14 +3684,14 @@
       goto cleanup;
     }
 
-    status = resizeVerticalFilter(imageBuffer, (unsigned int) image->columns, (unsigned int) image->rows, (image->alpha_trait==BlendPixelTrait)?1:0
+    status = resizeVerticalFilter(imageBuffer, (unsigned int) image->columns, (unsigned int) image->rows, (image->alpha_trait == UndefinedPixelTrait)?1:0
        , tempImageBuffer, (unsigned int) image->columns, (unsigned int) resizedRows
        , resizeFilter, cubicCoefficientsBuffer
        , yFactor, clEnv, queue, exception);
     if (status != MagickTrue)
       goto cleanup;
 
-    status = resizeHorizontalFilter(tempImageBuffer, (unsigned int) image->columns, (unsigned int) resizedRows, (image->alpha_trait==BlendPixelTrait)?1:0
+    status = resizeHorizontalFilter(tempImageBuffer, (unsigned int) image->columns, (unsigned int) resizedRows, (image->alpha_trait == UndefinedPixelTrait)?1:0
        , filteredImageBuffer, (unsigned int) resizedColumns, (unsigned int) resizedRows
        , resizeFilter, cubicCoefficientsBuffer
        , xFactor, clEnv, queue, exception);
@@ -5769,7 +5769,7 @@
   clStatus |=clEnv->library->clSetKernelArg(hullPass1,2,sizeof(unsigned int),(void *)&imageWidth);
   imageHeight = (unsigned int) image->rows;
   clStatus |=clEnv->library->clSetKernelArg(hullPass1,3,sizeof(unsigned int),(void *)&imageHeight);
-  matte = (image->alpha_trait==BlendPixelTrait)?0:1;
+  matte = (image->alpha_trait == UndefinedPixelTrait)?0:1;
   clStatus |=clEnv->library->clSetKernelArg(hullPass1,6,sizeof(int),(void *)&matte);
   if (clStatus != CL_SUCCESS)
   {
@@ -5783,7 +5783,7 @@
   clStatus |=clEnv->library->clSetKernelArg(hullPass2,2,sizeof(unsigned int),(void *)&imageWidth);
   imageHeight = (unsigned int) image->rows;
   clStatus |=clEnv->library->clSetKernelArg(hullPass2,3,sizeof(unsigned int),(void *)&imageHeight);
-  matte = (image->alpha_trait==BlendPixelTrait)?0:1;
+  matte = (image->alpha_trait == UndefinedPixelTrait)?0:1;
   clStatus |=clEnv->library->clSetKernelArg(hullPass2,6,sizeof(int),(void *)&matte);
   if (clStatus != CL_SUCCESS)
   {
@@ -6723,7 +6723,7 @@
   clStatus|=clEnv->library->clSetKernelArg(motionBlurKernel,i++,sizeof(cl_float4), &biasPixel);
 
   clStatus|=clEnv->library->clSetKernelArg(motionBlurKernel,i++,sizeof(ChannelType), &channel);
-  matte = (image->alpha_trait==BlendPixelTrait)?1:0;
+  matte = (image->alpha_trait == UndefinedPixelTrait)?1:0;
   clStatus|=clEnv->library->clSetKernelArg(motionBlurKernel,i++,sizeof(unsigned int), &matte);
   if (clStatus != CL_SUCCESS)
   {
@@ -6991,7 +6991,7 @@
   status = LaunchCompositeKernel(clEnv,queue,imageBuffer,
            (unsigned int) image->columns,
            (unsigned int) image->rows,
-           (unsigned int) (image->alpha_trait==BlendPixelTrait) ? 1 : 0,
+           (unsigned int) (image->alpha_trait == UndefinedPixelTrait) ? 1 : 0,
            channel, compose, compositeImageBuffer,
            (unsigned int) compositeImage->columns,
            (unsigned int) compositeImage->rows,
diff --git a/MagickCore/annotate.c b/MagickCore/annotate.c
index c58101d..1316c8c 100644
--- a/MagickCore/annotate.c
+++ b/MagickCore/annotate.c
@@ -1292,7 +1292,7 @@
     {
       if (image->storage_class != DirectClass)
         (void) SetImageStorageClass(image,DirectClass,exception);
-      if (image->alpha_trait != BlendPixelTrait)
+      if (image->alpha_trait == UndefinedPixelTrait)
         (void) SetImageAlphaChannel(image,OpaqueAlphaChannel,exception);
     }
   direction=1.0;
@@ -1819,9 +1819,9 @@
       /*
         Render fill color.
       */
-      if (image->alpha_trait != BlendPixelTrait)
+      if (image->alpha_trait == UndefinedPixelTrait)
         (void) SetImageAlphaChannel(image,OpaqueAlphaChannel,exception);
-      if (annotate_image->alpha_trait != BlendPixelTrait)
+      if (annotate_image->alpha_trait == UndefinedPixelTrait)
         (void) SetImageAlphaChannel(annotate_image,OpaqueAlphaChannel,
           exception);
       fill_color=draw_info->fill;
diff --git a/MagickCore/attribute.c b/MagickCore/attribute.c
index f443503..d8e5367 100644
--- a/MagickCore/attribute.c
+++ b/MagickCore/attribute.c
@@ -305,7 +305,7 @@
   status=MagickTrue;
   for (i=0; i < (ssize_t) number_threads; i++)
     current_depth[i]=1;
-  if ((image->storage_class == PseudoClass) && (image->alpha_trait != BlendPixelTrait))
+  if ((image->storage_class == PseudoClass) && (image->alpha_trait == UndefinedPixelTrait))
     {
 #if defined(MAGICKCORE_OPENMP_SUPPORT)
       #pragma omp parallel for schedule(static,4) shared(status) \
@@ -604,7 +604,7 @@
     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
   if (image->colorspace == CMYKColorspace)
     {
-      if (image->alpha_trait != BlendPixelTrait)
+      if (image->alpha_trait == UndefinedPixelTrait)
         return(ColorSeparationType);
       return(ColorSeparationMatteType);
     }
@@ -612,17 +612,17 @@
     return(BilevelType);
   if (IsImageGray(image,exception) != MagickFalse)
     {
-      if (image->alpha_trait == BlendPixelTrait)
+      if (image->alpha_trait != UndefinedPixelTrait)
         return(GrayscaleMatteType);
       return(GrayscaleType);
     }
   if (IsPaletteImage(image,exception) != MagickFalse)
     {
-      if (image->alpha_trait == BlendPixelTrait)
+      if (image->alpha_trait != UndefinedPixelTrait)
         return(PaletteMatteType);
       return(PaletteType);
     }
-  if (image->alpha_trait == BlendPixelTrait)
+  if (image->alpha_trait != UndefinedPixelTrait)
     return(TrueColorMatteType);
   return(TrueColorType);
 }
@@ -710,7 +710,7 @@
   if (SyncImagePixelCache((Image *) image,exception) == MagickFalse)
     return(MagickFalse);
   ((Image *) image)->type=type;
-  if ((type == GrayscaleType) && (image->alpha_trait == BlendPixelTrait))
+  if ((type == GrayscaleType) && (image->alpha_trait != UndefinedPixelTrait))
     ((Image *) image)->type=GrayscaleMatteType;
   return(MagickTrue);
 }
@@ -848,7 +848,7 @@
   assert(image->signature == MagickSignature);
   if (image->debug != MagickFalse)
     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
-  if (image->alpha_trait != BlendPixelTrait)
+  if (image->alpha_trait == UndefinedPixelTrait)
     return(MagickTrue);
   image_view=AcquireVirtualCacheView(image,exception);
   for (y=0; y < (ssize_t) image->rows; y++)
@@ -1193,7 +1193,7 @@
     {
       if (IsImageGray(image,exception) == MagickFalse)
         status=TransformImageColorspace(image,GRAYColorspace,exception);
-      if (image->alpha_trait != BlendPixelTrait)
+      if (image->alpha_trait == UndefinedPixelTrait)
         (void) SetImageAlphaChannel(image,OpaqueAlphaChannel,exception);
       break;
     }
@@ -1218,7 +1218,7 @@
 
       if (IssRGBCompatibleColorspace(image->colorspace) == MagickFalse)
         status=TransformImageColorspace(image,sRGBColorspace,exception);
-      if (image->alpha_trait != BlendPixelTrait)
+      if (image->alpha_trait == UndefinedPixelTrait)
         (void) SetImageAlphaChannel(image,OpaqueAlphaChannel,exception);
       channel_mask=SetImageChannelMask(image,AlphaChannel);
       (void) BilevelImage(image,(double) QuantumRange/2.0,exception);
@@ -1232,7 +1232,7 @@
     {
       if (IssRGBCompatibleColorspace(image->colorspace) == MagickFalse)
         status=TransformImageColorspace(image,sRGBColorspace,exception);
-      if (image->alpha_trait != BlendPixelTrait)
+      if (image->alpha_trait == UndefinedPixelTrait)
         (void) SetImageAlphaChannel(image,OpaqueAlphaChannel,exception);
       quantize_info=AcquireQuantizeInfo(image_info);
       quantize_info->colorspace=TransparentColorspace;
@@ -1255,7 +1255,7 @@
         status=TransformImageColorspace(image,sRGBColorspace,exception);
       if (image->storage_class != DirectClass)
         status=SetImageStorageClass(image,DirectClass,exception);
-      if (image->alpha_trait != BlendPixelTrait)
+      if (image->alpha_trait == UndefinedPixelTrait)
         (void) SetImageAlphaChannel(image,OpaqueAlphaChannel,exception);
       break;
     }
@@ -1282,7 +1282,7 @@
         }
       if (image->storage_class != DirectClass)
         status=SetImageStorageClass(image,DirectClass,exception);
-      if (image->alpha_trait != BlendPixelTrait)
+      if (image->alpha_trait == UndefinedPixelTrait)
         status=SetImageAlphaChannel(image,OpaqueAlphaChannel,exception);
       break;
     }
diff --git a/MagickCore/cache.c b/MagickCore/cache.c
index 317bc60..ce1cfbf 100644
--- a/MagickCore/cache.c
+++ b/MagickCore/cache.c
@@ -4771,8 +4771,8 @@
     {
       case BackgroundVirtualPixelMethod:
       {
-        if ((image->background_color.alpha_trait == BlendPixelTrait) &&
-            (image->alpha_trait != BlendPixelTrait))
+        if ((image->background_color.alpha_trait != UndefinedPixelTrait) &&
+            (image->alpha_trait == UndefinedPixelTrait))
           (void) SetCacheAlphaChannel(image,OpaqueAlpha,exception);
         if ((IsPixelInfoGray(&image->background_color) == MagickFalse) &&
             (IsGrayColorspace(image->colorspace) != MagickFalse))
@@ -4781,7 +4781,7 @@
       }
       case TransparentVirtualPixelMethod:
       {
-        if (image->alpha_trait != BlendPixelTrait)
+        if (image->alpha_trait == UndefinedPixelTrait)
           (void) SetCacheAlphaChannel(image,OpaqueAlpha,exception);
         break;
       }
diff --git a/MagickCore/channel.c b/MagickCore/channel.c
index 659b6c1..c312a16 100644
--- a/MagickCore/channel.c
+++ b/MagickCore/channel.c
@@ -626,7 +626,7 @@
   if (image->debug != MagickFalse)
     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"...");
   assert(image->signature == MagickSignature);
-  return(image->alpha_trait == BlendPixelTrait ? MagickTrue : MagickFalse);
+  return(image->alpha_trait != UndefinedPixelTrait ? MagickTrue : MagickFalse);
 }
 
 /*
@@ -1017,7 +1017,7 @@
       /*
         Set transparent pixels to background color.
       */
-      if (image->alpha_trait != BlendPixelTrait)
+      if (image->alpha_trait == UndefinedPixelTrait)
         break;
       status=SetImageStorageClass(image,DirectClass,exception);
       if (status == MagickFalse)
@@ -1164,7 +1164,7 @@
       /*
         Remove transparency.
       */
-      if (image->alpha_trait != BlendPixelTrait)
+      if (image->alpha_trait == UndefinedPixelTrait)
         break;
       status=SetImageStorageClass(image,DirectClass,exception);
       if (status == MagickFalse)
@@ -1207,7 +1207,7 @@
     }
     case SetAlphaChannel:
     {
-      if (image->alpha_trait != BlendPixelTrait)
+      if (image->alpha_trait == UndefinedPixelTrait)
         status=SetImageAlpha(image,OpaqueAlpha,exception);
       break;
     }
diff --git a/MagickCore/color.c b/MagickCore/color.c
index 4412795..3146330 100644
--- a/MagickCore/color.c
+++ b/MagickCore/color.c
@@ -1522,7 +1522,7 @@
       ConcatentateHexColorComponent(pixel,BluePixelChannel,tuple);
       if (pixel->colorspace == CMYKColorspace)
         ConcatentateHexColorComponent(pixel,BlackPixelChannel,tuple);
-      if ((pixel->alpha_trait == BlendPixelTrait) &&
+      if ((pixel->alpha_trait != UndefinedPixelTrait) &&
           (pixel->alpha != OpaqueAlpha))
         ConcatentateHexColorComponent(pixel,AlphaPixelChannel,tuple);
       return;
@@ -1551,7 +1551,7 @@
       if (color.colorspace-CMYKColorspace)
         status&=IsMagickTrue(fabs(color.black-SVGCompliant(color.black))
              < MagickEpsilon);
-      if (color.alpha_trait == BlendPixelTrait)
+      if (color.alpha_trait != UndefinedPixelTrait)
         status&=IsMagickTrue(fabs(color.alpha-SVGCompliant(color.alpha))
              < MagickEpsilon);
       if (IfMagickTrue(status))
@@ -1559,7 +1559,7 @@
     }
   (void) ConcatenateMagickString(tuple,CommandOptionToMnemonic(
     MagickColorspaceOptions,(ssize_t) color.colorspace),MaxTextExtent);
-  if (color.alpha_trait == BlendPixelTrait)
+  if (color.alpha_trait != UndefinedPixelTrait)
     (void) ConcatenateMagickString(tuple,"a",MaxTextExtent);
   (void) ConcatenateMagickString(tuple,"(",MaxTextExtent);
   if (color.colorspace == GRAYColorspace)
@@ -1577,7 +1577,7 @@
       (void) ConcatenateMagickString(tuple,",",MaxTextExtent);
       ConcatenateColorComponent(&color,BlackPixelChannel,SVGCompliance,tuple);
     }
-  if (color.alpha_trait == BlendPixelTrait)
+  if (color.alpha_trait != UndefinedPixelTrait)
     {
       (void) ConcatenateMagickString(tuple,",",MaxTextExtent);
       ConcatenateColorComponent(&color,AlphaPixelChannel,SVGCompliance,tuple);
@@ -1671,7 +1671,7 @@
   register double
     distance;
 
-  if (image->alpha_trait != BlendPixelTrait)
+  if (image->alpha_trait == UndefinedPixelTrait)
     return(MagickTrue);
   if (p->alpha == q->alpha)
     return(MagickTrue);
@@ -2412,12 +2412,12 @@
                 color->black=(double) ClampToQuantum(scale*
                   geometry_info.psi);
               else
-                if (color->alpha_trait == BlendPixelTrait)
+                if (color->alpha_trait != UndefinedPixelTrait)
                   color->alpha=(double) ClampToQuantum(QuantumRange*
                     geometry_info.psi);
             }
           if (((flags & ChiValue) != 0) &&
-              (color->alpha_trait == BlendPixelTrait))
+              (color->alpha_trait != UndefinedPixelTrait))
             color->alpha=(double) ClampToQuantum(QuantumRange*
               geometry_info.chi);
           if (color->colorspace == LabColorspace)
@@ -2435,7 +2435,7 @@
               color->green=color->red;
               color->blue=color->red;
               if (((flags & SigmaValue) != 0) &&
-                  (color->alpha_trait == BlendPixelTrait))
+                  (color->alpha_trait != UndefinedPixelTrait))
                 color->alpha=(double) ClampToQuantum(QuantumRange*
                   geometry_info.sigma);
             }
@@ -2576,7 +2576,7 @@
   GetColorTuple(&pixel,IsMagickTrue(compliance != SVGCompliance),name);
   if (IfMagickFalse(IssRGBColorspace(pixel.colorspace)))
     return(MagickFalse);
-  alpha=color->alpha_trait == BlendPixelTrait ? color->alpha : OpaqueAlpha;
+  alpha=color->alpha_trait != UndefinedPixelTrait ? color->alpha : OpaqueAlpha;
   (void) GetColorInfo("*",exception);
   ResetLinkedListIterator(color_cache);
   p=(const ColorInfo *) GetNextValueInLinkedList(color_cache);
diff --git a/MagickCore/colorspace.c b/MagickCore/colorspace.c
index f7e9e9e..36dfb4d 100644
--- a/MagickCore/colorspace.c
+++ b/MagickCore/colorspace.c
@@ -317,7 +317,7 @@
           status=MagickFalse;
       }
       image_view=DestroyCacheView(image_view);
-      image->type=image->alpha_trait != BlendPixelTrait ? ColorSeparationType :
+      image->type=image->alpha_trait == UndefinedPixelTrait ? ColorSeparationType :
         ColorSeparationMatteType;
       if (SetImageColorspace(image,colorspace,exception) == MagickFalse)
         return(MagickFalse);
diff --git a/MagickCore/composite.c b/MagickCore/composite.c
index e93f53d..c12f4fd 100644
--- a/MagickCore/composite.c
+++ b/MagickCore/composite.c
@@ -568,8 +568,8 @@
   if (IsGrayColorspace(image->colorspace) != MagickFalse)
     (void) SetImageColorspace(image,sRGBColorspace,exception);
   (void) SetImageColorspace(composite_image,image->colorspace,exception);
-  if ((image->alpha_trait == BlendPixelTrait) &&
-      (composite_image->alpha_trait != BlendPixelTrait))
+  if ((image->alpha_trait != UndefinedPixelTrait) &&
+      (composite_image->alpha_trait == UndefinedPixelTrait))
     (void) SetImageAlphaChannel(composite_image,SetAlphaChannel,exception);
   if ((compose == OverCompositeOp) || (compose == SrcOverCompositeOp))
     {
@@ -682,7 +682,7 @@
         Modify destination outside the overlaid region and require an alpha
         channel to exist, to add transparency.
       */
-      if (image->alpha_trait != BlendPixelTrait)
+      if (image->alpha_trait == UndefinedPixelTrait)
         (void) SetImageAlphaChannel(image,OpaqueAlphaChannel,exception);
       SetPixelAlphaTraits(image,CopyPixelTrait);
       break;
@@ -1559,7 +1559,7 @@
               case CopyAlphaCompositeOp:
               {
                 pixel=QuantumRange*Sa;
-                if (composite_image->alpha_trait != BlendPixelTrait)
+                if (composite_image->alpha_trait == UndefinedPixelTrait)
                   pixel=GetPixelIntensity(composite_image,p);
                 break;
               }
@@ -2353,8 +2353,8 @@
   status=MagickTrue;
   if ((image->compose != CopyCompositeOp) &&
       ((image->compose != OverCompositeOp) ||
-       (image->alpha_trait == BlendPixelTrait) ||
-       (texture_image->alpha_trait == BlendPixelTrait)))
+       (image->alpha_trait != UndefinedPixelTrait) ||
+       (texture_image->alpha_trait != UndefinedPixelTrait)))
     {
       /*
         Tile texture onto the image background.
diff --git a/MagickCore/decorate.c b/MagickCore/decorate.c
index fc7faa2..80d2c05 100644
--- a/MagickCore/decorate.c
+++ b/MagickCore/decorate.c
@@ -233,8 +233,8 @@
   if ((IsPixelInfoGray(&frame_image->border_color) == MagickFalse) &&
       (IsGrayColorspace(frame_image->colorspace) != MagickFalse))
     (void) SetImageColorspace(frame_image,sRGBColorspace,exception);
-  if ((frame_image->matte_color.alpha_trait == BlendPixelTrait) &&
-      (frame_image->alpha_trait != BlendPixelTrait))
+  if ((frame_image->matte_color.alpha_trait != UndefinedPixelTrait) &&
+      (frame_image->alpha_trait == UndefinedPixelTrait))
     (void) SetImageAlpha(frame_image,OpaqueAlpha,exception);
   frame_image->page=image->page;
   if ((image->page.width != 0) && (image->page.height != 0))
@@ -429,7 +429,7 @@
       Set frame interior to interior color.
     */
     if ((compose != CopyCompositeOp) && ((compose != OverCompositeOp) ||
-        (image->alpha_trait == BlendPixelTrait)))
+        (image->alpha_trait != UndefinedPixelTrait)))
       for (x=0; x < (ssize_t) image->columns; x++)
       {
         SetPixelInfoPixel(frame_image,&interior,q);
@@ -606,7 +606,7 @@
   frame_view=DestroyCacheView(frame_view);
   image_view=DestroyCacheView(image_view);
   if ((compose != CopyCompositeOp) && ((compose != OverCompositeOp) ||
-      (image->alpha_trait == BlendPixelTrait)))
+      (image->alpha_trait != UndefinedPixelTrait)))
     {
       x=(ssize_t) (frame_info->outer_bevel+(frame_info->x-bevel_width)+
         frame_info->inner_bevel);
diff --git a/MagickCore/display.c b/MagickCore/display.c
index 5a6f613..a9de3d3 100644
--- a/MagickCore/display.c
+++ b/MagickCore/display.c
@@ -8008,7 +8008,7 @@
       */
       XSetCursorState(display,windows,MagickTrue);
       XCheckRefreshWindows(display,windows);
-      (void) SetImageType(*image,(*image)->alpha_trait != BlendPixelTrait ?
+      (void) SetImageType(*image,(*image)->alpha_trait == UndefinedPixelTrait ?
         GrayscaleType : GrayscaleMatteType,exception);
       XSetCursorState(display,windows,MagickFalse);
       if (IfMagickTrue(windows->image.orphan) )
@@ -9163,7 +9163,7 @@
       Image
         *matte_image;
 
-      if ((*image)->alpha_trait != BlendPixelTrait)
+      if ((*image)->alpha_trait == UndefinedPixelTrait)
         {
           XNoticeWidget(display,windows,
             "Image does not have any matte information",(*image)->filename);
@@ -10096,7 +10096,7 @@
           continue;
         if (IfMagickFalse(SetImageStorageClass(*image,DirectClass,exception)) )
           return(MagickFalse);
-        if ((*image)->alpha_trait != BlendPixelTrait)
+        if ((*image)->alpha_trait == UndefinedPixelTrait)
           (void) SetImageAlphaChannel(*image,OpaqueAlphaChannel,exception);
         image_view=AcquireAuthenticCacheView(*image,exception);
         switch (method)
diff --git a/MagickCore/distort.c b/MagickCore/distort.c
index d20ec57..08ece35 100644
--- a/MagickCore/distort.c
+++ b/MagickCore/distort.c
@@ -1519,7 +1519,7 @@
     exception);
   tmp_image->image_info=image->image_info; /* preserve global options */
 
-  if (image->alpha_trait != BlendPixelTrait)
+  if (image->alpha_trait == UndefinedPixelTrait)
     {
       /*
         Image has not transparency channel, so we free to use it
@@ -2295,7 +2295,7 @@
   if ((IsPixelInfoGray(&distort_image->background_color) == MagickFalse) &&
       (IsGrayColorspace(distort_image->colorspace) != MagickFalse))
     (void) SetImageColorspace(distort_image,sRGBColorspace,exception);
-  if (distort_image->background_color.alpha_trait == BlendPixelTrait)
+  if (distort_image->background_color.alpha_trait != UndefinedPixelTrait)
     distort_image->alpha_trait=BlendPixelTrait;
   distort_image->page.x=geometry.x;
   distort_image->page.y=geometry.y;
@@ -2928,7 +2928,7 @@
       (image->colorspace == CMYKColorspace))
     number_colors++;
   if (((GetPixelAlphaTraits(image) & UpdatePixelTrait) != 0) &&
-      (image->alpha_trait == BlendPixelTrait))
+      (image->alpha_trait != UndefinedPixelTrait))
     number_colors++;
 
   /*
@@ -2980,7 +2980,7 @@
           (void) FormatLocaleFile(stderr, "  -channel K -fx '%+lf*i %+lf*j %+lf' \\\n",
               coeff[x], coeff[x+1], coeff[x+2]),x+=3;
         if (((GetPixelAlphaTraits(image) & UpdatePixelTrait) != 0) &&
-            (image->alpha_trait == BlendPixelTrait))
+            (image->alpha_trait != UndefinedPixelTrait))
           (void) FormatLocaleFile(stderr, "  -channel A -fx '%+lf*i %+lf*j %+lf' \\\n",
               coeff[x], coeff[x+1], coeff[x+2]),x+=3;
         break;
@@ -3007,7 +3007,7 @@
               coeff[ x ], coeff[x+1],
               coeff[x+2], coeff[x+3]),x+=4;
         if (((GetPixelAlphaTraits(image) & UpdatePixelTrait) != 0) &&
-            (image->alpha_trait == BlendPixelTrait))
+            (image->alpha_trait != UndefinedPixelTrait))
           (void) FormatLocaleFile(stderr, "   -channel A -fx '%+lf*i %+lf*j %+lf*i*j %+lf;\n",
               coeff[ x ], coeff[x+1],
               coeff[x+2], coeff[x+3]),x+=4;
@@ -3097,7 +3097,7 @@
               pixel.black   = coeff[x]*i +coeff[x+1]*j
                               +coeff[x+2], x+=3;
             if (((GetPixelAlphaTraits(image) & UpdatePixelTrait) != 0) &&
-                (image->alpha_trait == BlendPixelTrait))
+                (image->alpha_trait != UndefinedPixelTrait))
               pixel.alpha = coeff[x]*i +coeff[x+1]*j
                               +coeff[x+2], x+=3;
             break;
@@ -3119,7 +3119,7 @@
               pixel.black   = coeff[x]*i     + coeff[x+1]*j +
                               coeff[x+2]*i*j + coeff[x+3], x+=4;
             if (((GetPixelAlphaTraits(image) & UpdatePixelTrait) != 0) &&
-                (image->alpha_trait == BlendPixelTrait))
+                (image->alpha_trait != UndefinedPixelTrait))
               pixel.alpha = coeff[x]*i     + coeff[x+1]*j +
                               coeff[x+2]*i*j + coeff[x+3], x+=4;
             break;
@@ -3142,7 +3142,7 @@
                 (image->colorspace == CMYKColorspace))
               pixel.black=0.0;
             if (((GetPixelAlphaTraits(image) & UpdatePixelTrait) != 0) &&
-                (image->alpha_trait == BlendPixelTrait))
+                (image->alpha_trait != UndefinedPixelTrait))
               pixel.alpha=0.0;
             denominator = 0.0;
             for(k=0; k<number_arguments; k+=2+number_colors) {
@@ -3162,7 +3162,7 @@
                   (image->colorspace == CMYKColorspace))
                 pixel.black   += arguments[x++]*weight;
               if (((GetPixelAlphaTraits(image) & UpdatePixelTrait) != 0) &&
-                  (image->alpha_trait == BlendPixelTrait))
+                  (image->alpha_trait != UndefinedPixelTrait))
                 pixel.alpha += arguments[x++]*weight;
               denominator += weight;
             }
@@ -3176,7 +3176,7 @@
                 (image->colorspace == CMYKColorspace))
               pixel.black/=denominator;
             if (((GetPixelAlphaTraits(image) & UpdatePixelTrait) != 0) &&
-                (image->alpha_trait == BlendPixelTrait))
+                (image->alpha_trait != UndefinedPixelTrait))
               pixel.alpha/=denominator;
             break;
           }
@@ -3208,7 +3208,7 @@
                     (image->colorspace == CMYKColorspace))
                   pixel.black=arguments[x++];
                 if (((GetPixelAlphaTraits(image) & UpdatePixelTrait) != 0) &&
-                    (image->alpha_trait == BlendPixelTrait))
+                    (image->alpha_trait != UndefinedPixelTrait))
                   pixel.alpha=arguments[x++];
                 minimum = distance;
               }
@@ -3227,7 +3227,7 @@
             (image->colorspace == CMYKColorspace))
           pixel.black*=QuantumRange;
         if (((GetPixelAlphaTraits(image) & UpdatePixelTrait) != 0) &&
-            (image->alpha_trait == BlendPixelTrait))
+            (image->alpha_trait != UndefinedPixelTrait))
           pixel.alpha*=QuantumRange;
         SetPixelInfoPixel(sparse_image,&pixel,q);
         q+=GetPixelChannels(sparse_image);
diff --git a/MagickCore/draw.c b/MagickCore/draw.c
index 4f4dbf7..6c2973e 100644
--- a/MagickCore/draw.c
+++ b/MagickCore/draw.c
@@ -3936,7 +3936,7 @@
   /*
     Draw polygon or line.
   */
-  if (image->alpha_trait != BlendPixelTrait)
+  if (image->alpha_trait == UndefinedPixelTrait)
     (void) SetImageAlphaChannel(image,OpaqueAlphaChannel,exception);
   start=(ssize_t) ceil(bounds.y1-0.5);
   stop=(ssize_t) floor(bounds.y2+0.5);
@@ -4316,7 +4316,7 @@
     }
     case MattePrimitive:
     {
-      if (image->alpha_trait != BlendPixelTrait)
+      if (image->alpha_trait == UndefinedPixelTrait)
         (void) SetImageAlphaChannel(image,OpaqueAlphaChannel,exception);
       switch (primitive_info->method)
       {
@@ -4512,7 +4512,7 @@
           (void) TransformImage(&composite_image,(char *) NULL,geometry,
             exception);
         }
-      if (composite_image->alpha_trait != BlendPixelTrait)
+      if (composite_image->alpha_trait == UndefinedPixelTrait)
         (void) SetImageAlphaChannel(composite_image,OpaqueAlphaChannel,
           exception);
       if (draw_info->alpha != OpaqueAlpha)
diff --git a/MagickCore/enhance.c b/MagickCore/enhance.c
index bdbf2ad..9d51453 100644
--- a/MagickCore/enhance.c
+++ b/MagickCore/enhance.c
@@ -411,7 +411,7 @@
   }
   image_view=DestroyCacheView(image_view);
   clut_map=(PixelInfo *) RelinquishMagickMemory(clut_map);
-  if ((clut_image->alpha_trait == BlendPixelTrait) &&
+  if ((clut_image->alpha_trait != UndefinedPixelTrait) &&
       ((GetPixelAlphaTraits(image) & UpdatePixelTrait) != 0))
     (void) SetImageAlphaChannel(image,ActivateAlphaChannel,exception);
   return(status);
@@ -2195,7 +2195,7 @@
   assert(hald_image->signature == MagickSignature);
   if( IfMagickFalse(SetImageStorageClass(image,DirectClass,exception)) )
     return(MagickFalse);
-  if (image->alpha_trait != BlendPixelTrait)
+  if (image->alpha_trait == UndefinedPixelTrait)
     (void) SetImageAlphaChannel(image,OpaqueAlphaChannel,exception);
   /*
     Hald clut image.
@@ -2283,7 +2283,7 @@
           (image->colorspace == CMYKColorspace))
         SetPixelBlack(image,ClampToQuantum(pixel.black),q);
       if (((GetPixelAlphaTraits(image) & UpdatePixelTrait) != 0) &&
-          (image->alpha_trait == BlendPixelTrait))
+          (image->alpha_trait != UndefinedPixelTrait))
         SetPixelAlpha(image,ClampToQuantum(pixel.alpha),q);
       q+=GetPixelChannels(image);
     }
@@ -2726,7 +2726,7 @@
           (void) SetImageChannelMask(image,channel_mask);
         }
       if (((GetPixelAlphaTraits(image) & UpdatePixelTrait) != 0) &&
-          (image->alpha_trait == BlendPixelTrait))
+          (image->alpha_trait != UndefinedPixelTrait))
         {
           channel_mask=SetImageChannelMask(image,AlphaChannel);
           status&=LevelImage(image,black_color->alpha,white_color->alpha,1.0,
@@ -2766,7 +2766,7 @@
           (void) SetImageChannelMask(image,channel_mask);
         }
       if (((GetPixelAlphaTraits(image) & UpdatePixelTrait) != 0) &&
-          (image->alpha_trait == BlendPixelTrait))
+          (image->alpha_trait != UndefinedPixelTrait))
         {
           channel_mask=SetImageChannelMask(image,AlphaChannel);
           status&=LevelizeImage(image,black_color->alpha,white_color->alpha,1.0,
diff --git a/MagickCore/feature.c b/MagickCore/feature.c
index 7dc3faa..b903032 100644
--- a/MagickCore/feature.c
+++ b/MagickCore/feature.c
@@ -742,7 +742,7 @@
       if (image->colorspace == CMYKColorspace)
         grays[ScaleQuantumToMap(GetPixelBlack(image,p))].black=
           ScaleQuantumToMap(GetPixelBlack(image,p));
-      if (image->alpha_trait == BlendPixelTrait)
+      if (image->alpha_trait != UndefinedPixelTrait)
         grays[ScaleQuantumToMap(GetPixelAlpha(image,p))].alpha=
           ScaleQuantumToMap(GetPixelAlpha(image,p));
       p+=GetPixelChannels(image);
@@ -768,7 +768,7 @@
     if (image->colorspace == CMYKColorspace)
       if (grays[i].black != ~0U)
         grays[gray.black++].black=grays[i].black;
-    if (image->alpha_trait == BlendPixelTrait)
+    if (image->alpha_trait != UndefinedPixelTrait)
       if (grays[i].alpha != ~0U)
         grays[gray.alpha++].alpha=grays[i].alpha;
   }
@@ -783,7 +783,7 @@
   if (image->colorspace == CMYKColorspace)
     if (gray.black > number_grays)
       number_grays=gray.black;
-  if (image->alpha_trait == BlendPixelTrait)
+  if (image->alpha_trait != UndefinedPixelTrait)
     if (gray.alpha > number_grays)
       number_grays=gray.alpha;
   cooccurrence=(ChannelStatistics **) AcquireQuantumMemory(number_grays,
@@ -985,7 +985,7 @@
             cooccurrence[u][v].direction[i].black++;
             cooccurrence[v][u].direction[i].black++;
           }
-        if (image->alpha_trait == BlendPixelTrait)
+        if (image->alpha_trait != UndefinedPixelTrait)
           {
             u=0;
             v=0;
@@ -1074,7 +1074,7 @@
         cooccurrence[x][y].direction[i].blue*=normalize;
         if (image->colorspace == CMYKColorspace)
           cooccurrence[x][y].direction[i].black*=normalize;
-        if (image->alpha_trait == BlendPixelTrait)
+        if (image->alpha_trait != UndefinedPixelTrait)
           cooccurrence[x][y].direction[i].alpha*=normalize;
       }
     }
@@ -1114,7 +1114,7 @@
           channel_features[BlackPixelChannel].angular_second_moment[i]+=
             cooccurrence[x][y].direction[i].black*
             cooccurrence[x][y].direction[i].black;
-        if (image->alpha_trait == BlendPixelTrait)
+        if (image->alpha_trait != UndefinedPixelTrait)
           channel_features[AlphaPixelChannel].angular_second_moment[i]+=
             cooccurrence[x][y].direction[i].alpha*
             cooccurrence[x][y].direction[i].alpha;
@@ -1126,7 +1126,7 @@
         sum[y].direction[i].blue+=cooccurrence[x][y].direction[i].blue;
         if (image->colorspace == CMYKColorspace)
           sum[y].direction[i].black+=cooccurrence[x][y].direction[i].black;
-        if (image->alpha_trait == BlendPixelTrait)
+        if (image->alpha_trait != UndefinedPixelTrait)
           sum[y].direction[i].alpha+=cooccurrence[x][y].direction[i].alpha;
         correlation.direction[i].red+=x*y*cooccurrence[x][y].direction[i].red;
         correlation.direction[i].green+=x*y*
@@ -1136,7 +1136,7 @@
         if (image->colorspace == CMYKColorspace)
           correlation.direction[i].black+=x*y*
             cooccurrence[x][y].direction[i].black;
-        if (image->alpha_trait == BlendPixelTrait)
+        if (image->alpha_trait != UndefinedPixelTrait)
           correlation.direction[i].alpha+=x*y*
             cooccurrence[x][y].direction[i].alpha;
         /*
@@ -1151,7 +1151,7 @@
         if (image->colorspace == CMYKColorspace)
           channel_features[BlackPixelChannel].inverse_difference_moment[i]+=
             cooccurrence[x][y].direction[i].black/((y-x)*(y-x)+1);
-        if (image->alpha_trait == BlendPixelTrait)
+        if (image->alpha_trait != UndefinedPixelTrait)
           channel_features[AlphaPixelChannel].inverse_difference_moment[i]+=
             cooccurrence[x][y].direction[i].alpha/((y-x)*(y-x)+1);
         /*
@@ -1166,7 +1166,7 @@
         if (image->colorspace == CMYKColorspace)
           density_xy[y+x+2].direction[i].black+=
             cooccurrence[x][y].direction[i].black;
-        if (image->alpha_trait == BlendPixelTrait)
+        if (image->alpha_trait != UndefinedPixelTrait)
           density_xy[y+x+2].direction[i].alpha+=
             cooccurrence[x][y].direction[i].alpha;
         /*
@@ -1185,7 +1185,7 @@
           channel_features[BlackPixelChannel].entropy[i]-=
             cooccurrence[x][y].direction[i].black*
             MagickLog10(cooccurrence[x][y].direction[i].black);
-        if (image->alpha_trait == BlendPixelTrait)
+        if (image->alpha_trait != UndefinedPixelTrait)
           channel_features[AlphaPixelChannel].entropy[i]-=
             cooccurrence[x][y].direction[i].alpha*
             MagickLog10(cooccurrence[x][y].direction[i].alpha);
@@ -1195,7 +1195,7 @@
         density_x[x].direction[i].red+=cooccurrence[x][y].direction[i].red;
         density_x[x].direction[i].green+=cooccurrence[x][y].direction[i].green;
         density_x[x].direction[i].blue+=cooccurrence[x][y].direction[i].blue;
-        if (image->alpha_trait == BlendPixelTrait)
+        if (image->alpha_trait != UndefinedPixelTrait)
           density_x[x].direction[i].alpha+=
             cooccurrence[x][y].direction[i].alpha;
         if (image->colorspace == CMYKColorspace)
@@ -1207,7 +1207,7 @@
         if (image->colorspace == CMYKColorspace)
           density_y[y].direction[i].black+=
             cooccurrence[x][y].direction[i].black;
-        if (image->alpha_trait == BlendPixelTrait)
+        if (image->alpha_trait != UndefinedPixelTrait)
           density_y[y].direction[i].alpha+=
             cooccurrence[x][y].direction[i].alpha;
       }
@@ -1222,7 +1222,7 @@
           mean.direction[i].black+=y*sum[y].direction[i].black;
           sum_squares.direction[i].black+=y*y*sum[y].direction[i].black;
         }
-      if (image->alpha_trait == BlendPixelTrait)
+      if (image->alpha_trait != UndefinedPixelTrait)
         {
           mean.direction[i].alpha+=y*sum[y].direction[i].alpha;
           sum_squares.direction[i].alpha+=y*y*sum[y].direction[i].alpha;
@@ -1256,7 +1256,7 @@
         (mean.direction[i].black*mean.direction[i].black))*sqrt(
         sum_squares.direction[i].black-(mean.direction[i].black*
         mean.direction[i].black)));
-    if (image->alpha_trait == BlendPixelTrait)
+    if (image->alpha_trait != UndefinedPixelTrait)
       channel_features[AlphaPixelChannel].correlation[i]=
         (correlation.direction[i].alpha-mean.direction[i].alpha*
         mean.direction[i].alpha)/(sqrt(sum_squares.direction[i].alpha-
@@ -1290,7 +1290,7 @@
       if (image->colorspace == CMYKColorspace)
         channel_features[BlackPixelChannel].sum_average[i]+=
           x*density_xy[x].direction[i].black;
-      if (image->alpha_trait == BlendPixelTrait)
+      if (image->alpha_trait != UndefinedPixelTrait)
         channel_features[AlphaPixelChannel].sum_average[i]+=
           x*density_xy[x].direction[i].alpha;
       /*
@@ -1309,7 +1309,7 @@
         channel_features[BlackPixelChannel].sum_entropy[i]-=
           density_xy[x].direction[i].black*
           MagickLog10(density_xy[x].direction[i].black);
-      if (image->alpha_trait == BlendPixelTrait)
+      if (image->alpha_trait != UndefinedPixelTrait)
         channel_features[AlphaPixelChannel].sum_entropy[i]-=
           density_xy[x].direction[i].alpha*
           MagickLog10(density_xy[x].direction[i].alpha);
@@ -1333,7 +1333,7 @@
           (x-channel_features[BlackPixelChannel].sum_entropy[i])*
           (x-channel_features[BlackPixelChannel].sum_entropy[i])*
           density_xy[x].direction[i].black;
-      if (image->alpha_trait == BlendPixelTrait)
+      if (image->alpha_trait != UndefinedPixelTrait)
         channel_features[AlphaPixelChannel].sum_variance[i]+=
           (x-channel_features[AlphaPixelChannel].sum_entropy[i])*
           (x-channel_features[AlphaPixelChannel].sum_entropy[i])*
@@ -1371,7 +1371,7 @@
         if (image->colorspace == CMYKColorspace)
           variance.direction[i].black+=(y-mean.direction[i].black+1)*
             (y-mean.direction[i].black+1)*cooccurrence[x][y].direction[i].black;
-        if (image->alpha_trait == BlendPixelTrait)
+        if (image->alpha_trait != UndefinedPixelTrait)
           variance.direction[i].alpha+=(y-mean.direction[i].alpha+1)*
             (y-mean.direction[i].alpha+1)*
             cooccurrence[x][y].direction[i].alpha;
@@ -1387,7 +1387,7 @@
         if (image->colorspace == CMYKColorspace)
           density_xy[MagickAbsoluteValue(y-x)].direction[i].black+=
             cooccurrence[x][y].direction[i].black;
-        if (image->alpha_trait == BlendPixelTrait)
+        if (image->alpha_trait != UndefinedPixelTrait)
           density_xy[MagickAbsoluteValue(y-x)].direction[i].alpha+=
             cooccurrence[x][y].direction[i].alpha;
         /*
@@ -1402,7 +1402,7 @@
         if (image->colorspace == CMYKColorspace)
           entropy_xy.direction[i].black-=cooccurrence[x][y].direction[i].black*
             MagickLog10(cooccurrence[x][y].direction[i].black);
-        if (image->alpha_trait == BlendPixelTrait)
+        if (image->alpha_trait != UndefinedPixelTrait)
           entropy_xy.direction[i].alpha-=
             cooccurrence[x][y].direction[i].alpha*MagickLog10(
             cooccurrence[x][y].direction[i].alpha);
@@ -1417,7 +1417,7 @@
           entropy_xy1.direction[i].black-=(
             cooccurrence[x][y].direction[i].black*MagickLog10(
             density_x[x].direction[i].black*density_y[y].direction[i].black));
-        if (image->alpha_trait == BlendPixelTrait)
+        if (image->alpha_trait != UndefinedPixelTrait)
           entropy_xy1.direction[i].alpha-=(
             cooccurrence[x][y].direction[i].alpha*MagickLog10(
             density_x[x].direction[i].alpha*density_y[y].direction[i].alpha));
@@ -1434,7 +1434,7 @@
           entropy_xy2.direction[i].black-=(density_x[x].direction[i].black*
             density_y[y].direction[i].black*MagickLog10(
             density_x[x].direction[i].black*density_y[y].direction[i].black));
-        if (image->alpha_trait == BlendPixelTrait)
+        if (image->alpha_trait != UndefinedPixelTrait)
           entropy_xy2.direction[i].alpha-=(density_x[x].direction[i].alpha*
             density_y[y].direction[i].alpha*MagickLog10(
             density_x[x].direction[i].alpha*density_y[y].direction[i].alpha));
@@ -1449,7 +1449,7 @@
     if (image->colorspace == CMYKColorspace)
       channel_features[BlackPixelChannel].variance_sum_of_squares[i]=
         variance.direction[i].black;
-    if (image->alpha_trait == BlendPixelTrait)
+    if (image->alpha_trait != UndefinedPixelTrait)
       channel_features[AlphaPixelChannel].variance_sum_of_squares[i]=
         variance.direction[i].alpha;
   }
@@ -1477,7 +1477,7 @@
       variance.direction[i].blue+=density_xy[x].direction[i].blue;
       if (image->colorspace == CMYKColorspace)
         variance.direction[i].black+=density_xy[x].direction[i].black;
-      if (image->alpha_trait == BlendPixelTrait)
+      if (image->alpha_trait != UndefinedPixelTrait)
         variance.direction[i].alpha+=density_xy[x].direction[i].alpha;
       sum_squares.direction[i].red+=density_xy[x].direction[i].red*
         density_xy[x].direction[i].red;
@@ -1488,7 +1488,7 @@
       if (image->colorspace == CMYKColorspace)
         sum_squares.direction[i].black+=density_xy[x].direction[i].black*
           density_xy[x].direction[i].black;
-      if (image->alpha_trait == BlendPixelTrait)
+      if (image->alpha_trait != UndefinedPixelTrait)
         sum_squares.direction[i].alpha+=density_xy[x].direction[i].alpha*
           density_xy[x].direction[i].alpha;
       /*
@@ -1507,7 +1507,7 @@
         channel_features[BlackPixelChannel].difference_entropy[i]-=
           density_xy[x].direction[i].black*
           MagickLog10(density_xy[x].direction[i].black);
-      if (image->alpha_trait == BlendPixelTrait)
+      if (image->alpha_trait != UndefinedPixelTrait)
         channel_features[AlphaPixelChannel].difference_entropy[i]-=
           density_xy[x].direction[i].alpha*
           MagickLog10(density_xy[x].direction[i].alpha);
@@ -1523,7 +1523,7 @@
       if (image->colorspace == CMYKColorspace)
         entropy_x.direction[i].black-=(density_x[x].direction[i].black*
           MagickLog10(density_x[x].direction[i].black));
-      if (image->alpha_trait == BlendPixelTrait)
+      if (image->alpha_trait != UndefinedPixelTrait)
         entropy_x.direction[i].alpha-=(density_x[x].direction[i].alpha*
           MagickLog10(density_x[x].direction[i].alpha));
       entropy_y.direction[i].red-=(density_y[x].direction[i].red*
@@ -1535,7 +1535,7 @@
       if (image->colorspace == CMYKColorspace)
         entropy_y.direction[i].black-=(density_y[x].direction[i].black*
           MagickLog10(density_y[x].direction[i].black));
-      if (image->alpha_trait == BlendPixelTrait)
+      if (image->alpha_trait != UndefinedPixelTrait)
         entropy_y.direction[i].alpha-=(density_y[x].direction[i].alpha*
           MagickLog10(density_y[x].direction[i].alpha));
     }
@@ -1559,7 +1559,7 @@
         (((double) number_grays*number_grays*sum_squares.direction[i].black)-
         (variance.direction[i].black*variance.direction[i].black))/
         ((double) number_grays*number_grays*number_grays*number_grays);
-    if (image->alpha_trait == BlendPixelTrait)
+    if (image->alpha_trait != UndefinedPixelTrait)
       channel_features[AlphaPixelChannel].difference_variance[i]=
         (((double) number_grays*number_grays*sum_squares.direction[i].alpha)-
         (variance.direction[i].alpha*variance.direction[i].alpha))/
@@ -1584,7 +1584,7 @@
         (entropy_xy.direction[i].black-entropy_xy1.direction[i].black)/
         (entropy_x.direction[i].black > entropy_y.direction[i].black ?
          entropy_x.direction[i].black : entropy_y.direction[i].black);
-    if (image->alpha_trait == BlendPixelTrait)
+    if (image->alpha_trait != UndefinedPixelTrait)
       channel_features[AlphaPixelChannel].measure_of_correlation_1[i]=
         (entropy_xy.direction[i].alpha-entropy_xy1.direction[i].alpha)/
         (entropy_x.direction[i].alpha > entropy_y.direction[i].alpha ?
@@ -1602,7 +1602,7 @@
       channel_features[BlackPixelChannel].measure_of_correlation_2[i]=
         (sqrt(fabs(1.0-exp(-2.0*(entropy_xy2.direction[i].black-
         entropy_xy.direction[i].black)))));
-    if (image->alpha_trait == BlendPixelTrait)
+    if (image->alpha_trait != UndefinedPixelTrait)
       channel_features[AlphaPixelChannel].measure_of_correlation_2[i]=
         (sqrt(fabs(1.0-exp(-2.0*(entropy_xy2.direction[i].alpha-
         entropy_xy.direction[i].alpha)))));
@@ -1645,7 +1645,7 @@
               pixel.direction[i].blue+=cooccurrence[x][y].direction[i].blue;
               if (image->colorspace == CMYKColorspace)
                 pixel.direction[i].black+=cooccurrence[x][y].direction[i].black;
-              if (image->alpha_trait == BlendPixelTrait)
+              if (image->alpha_trait != UndefinedPixelTrait)
                 pixel.direction[i].alpha+=
                   cooccurrence[x][y].direction[i].alpha;
             }
@@ -1665,7 +1665,7 @@
             Q[z][y].direction[i].black+=cooccurrence[z][x].direction[i].black*
               cooccurrence[y][x].direction[i].black/
               density_x[z].direction[i].black/density_y[x].direction[i].black;
-          if (image->alpha_trait == BlendPixelTrait)
+          if (image->alpha_trait != UndefinedPixelTrait)
             Q[z][y].direction[i].alpha+=
               cooccurrence[z][x].direction[i].alpha*
               cooccurrence[y][x].direction[i].alpha/
@@ -1682,7 +1682,7 @@
       if (image->colorspace == CMYKColorspace)
         channel_features[BlackPixelChannel].contrast[i]+=z*z*
           pixel.direction[i].black;
-      if (image->alpha_trait == BlendPixelTrait)
+      if (image->alpha_trait != UndefinedPixelTrait)
         channel_features[AlphaPixelChannel].contrast[i]+=z*z*
           pixel.direction[i].alpha;
     }
@@ -1699,7 +1699,7 @@
     if (image->colorspace == CMYKColorspace)
       channel_features[BlackPixelChannel].maximum_correlation_coefficient[i]=
         sqrt((double) -1.0);
-    if (image->alpha_trait == BlendPixelTrait)
+    if (image->alpha_trait != UndefinedPixelTrait)
       channel_features[AlphaPixelChannel].maximum_correlation_coefficient[i]=
         sqrt((double) -1.0);
   }
diff --git a/MagickCore/fourier.c b/MagickCore/fourier.c
index a649eca..72b5be4 100644
--- a/MagickCore/fourier.c
+++ b/MagickCore/fourier.c
@@ -1017,7 +1017,7 @@
                   thread_status;
 
                 thread_status=MagickTrue;
-                if (image->alpha_trait == BlendPixelTrait)
+                if (image->alpha_trait != UndefinedPixelTrait)
                   thread_status=ForwardFourierTransformChannel(image,
                     AlphaPixelChannel,modulus,fourier_image,exception);
                 if (thread_status == MagickFalse)
@@ -1584,7 +1584,7 @@
               thread_status;
 
             thread_status=MagickTrue;
-            if (magnitude_image->alpha_trait == BlendPixelTrait)
+            if (magnitude_image->alpha_trait != UndefinedPixelTrait)
               thread_status=InverseFourierTransformChannel(magnitude_image,
                 phase_image,AlphaPixelChannel,modulus,fourier_image,exception);
             if (thread_status == MagickFalse)
diff --git a/MagickCore/fx.c b/MagickCore/fx.c
index 1c2450b..8f17107 100644
--- a/MagickCore/fx.c
+++ b/MagickCore/fx.c
@@ -701,8 +701,8 @@
   if ((IsGrayColorspace(image->colorspace) != MagickFalse) ||
       (IsPixelInfoGray(colorize) != MagickFalse))
     (void) SetImageColorspace(colorize_image,sRGBColorspace,exception);
-  if ((colorize_image->alpha_trait != BlendPixelTrait) &&
-      (colorize->alpha_trait == BlendPixelTrait))
+  if ((colorize_image->alpha_trait == UndefinedPixelTrait) &&
+      (colorize->alpha_trait != UndefinedPixelTrait))
     (void) SetImageAlpha(colorize_image,OpaqueAlpha,exception);
   if (blend == (const char *) NULL)
     return(colorize_image);
@@ -993,7 +993,7 @@
           GetPixelGreen(image,p)+ColorMatrix[v][2]*GetPixelBlue(image,p);
         if (image->colorspace == CMYKColorspace)
           sum+=ColorMatrix[v][3]*GetPixelBlack(image,p);
-        if (image->alpha_trait == BlendPixelTrait)
+        if (image->alpha_trait != UndefinedPixelTrait)
           sum+=ColorMatrix[v][4]*GetPixelAlpha(image,p);
         sum+=QuantumRange*ColorMatrix[v][5];
         switch (v)
@@ -1487,7 +1487,7 @@
           double
             alpha;
 
-          if (pixel.alpha_trait != BlendPixelTrait)
+          if (pixel.alpha_trait == UndefinedPixelTrait)
             return(1.0);
           alpha=(double) (QuantumScale*pixel.alpha);
           return(alpha);
@@ -4292,7 +4292,7 @@
   clone_image=DestroyImage(clone_image);
   if (border_image == (Image *) NULL)
     return((Image *) NULL);
-  if (border_image->alpha_trait != BlendPixelTrait)
+  if (border_image->alpha_trait == UndefinedPixelTrait)
     (void) SetImageAlphaChannel(border_image,OpaqueAlphaChannel,exception);
   /*
     Shadow image.
@@ -4323,7 +4323,7 @@
     background_color.alpha_trait=BlendPixelTrait;
     for (x=0; x < (ssize_t) border_image->columns; x++)
     {
-      if (border_image->alpha_trait == BlendPixelTrait)
+      if (border_image->alpha_trait != UndefinedPixelTrait)
         background_color.alpha=GetPixelAlpha(border_image,q)*alpha/100.0;
       SetPixelInfoPixel(border_image,&background_color,q);
       q+=GetPixelChannels(border_image);
diff --git a/MagickCore/histogram.c b/MagickCore/histogram.c
index f16f180..467a853 100644
--- a/MagickCore/histogram.c
+++ b/MagickCore/histogram.c
@@ -166,7 +166,7 @@
     ((ScaleQuantumToChar(ClampToQuantum(pixel->red)) >> index) & 0x01) |
     ((ScaleQuantumToChar(ClampToQuantum(pixel->green)) >> index) & 0x01) << 1 |
     ((ScaleQuantumToChar(ClampToQuantum(pixel->blue)) >> index) & 0x01) << 2);
-  if (image->alpha_trait == BlendPixelTrait)
+  if (image->alpha_trait != UndefinedPixelTrait)
     id|=((ScaleQuantumToChar(ClampToQuantum(pixel->alpha)) >> index) &
       0x01) << 3;
   return(id);
@@ -342,7 +342,7 @@
   /*
     Traverse any children.
   */
-  number_children=image->alpha_trait != BlendPixelTrait ? 8UL : 16UL;
+  number_children=image->alpha_trait == UndefinedPixelTrait ? 8UL : 16UL;
   for (i=0; i < (ssize_t) number_children; i++)
     if (node_info->child[i] != (NodeInfo *) NULL)
       DefineImageHistogram(image,node_info->child[i],histogram);
@@ -441,7 +441,7 @@
   /*
     Traverse any children.
   */
-  number_children=image->alpha_trait != BlendPixelTrait ? 8UL : 16UL;
+  number_children=image->alpha_trait == UndefinedPixelTrait ? 8UL : 16UL;
   for (i=0; i < (ssize_t) number_children; i++)
     if (node_info->child[i] != (NodeInfo *) NULL)
       DestroyColorCube(image,node_info->child[i]);
@@ -1142,7 +1142,7 @@
         ConcatenateColorComponent(&pixel,BlackPixelChannel,X11Compliance,
           tuple);
       }
-    if (pixel.alpha_trait == BlendPixelTrait)
+    if (pixel.alpha_trait != UndefinedPixelTrait)
       {
         (void) ConcatenateMagickString(tuple,",",MaxTextExtent);
         ConcatenateColorComponent(&pixel,AlphaPixelChannel,X11Compliance,
@@ -1215,7 +1215,7 @@
   /*
     Traverse any children.
   */
-  number_children=unique_image->alpha_trait != BlendPixelTrait ? 8UL : 16UL;
+  number_children=unique_image->alpha_trait == UndefinedPixelTrait ? 8UL : 16UL;
   for (i=0; i < (ssize_t) number_children; i++)
     if (node_info->child[i] != (NodeInfo *) NULL)
       UniqueColorsToImage(unique_image,unique_view,cube_info,
diff --git a/MagickCore/identify.c b/MagickCore/identify.c
index 85523ee..ea03968 100644
--- a/MagickCore/identify.c
+++ b/MagickCore/identify.c
@@ -549,7 +549,7 @@
           break;
         }
       }
-      if (image->alpha_trait == BlendPixelTrait)
+      if (image->alpha_trait != UndefinedPixelTrait)
         (void) PrintChannelLocations(file,image,AlphaPixelChannel,"Alpha",
           type,max_locations,channel_statistics);
       channel_statistics=(ChannelStatistics *) RelinquishMagickMemory(
@@ -756,7 +756,7 @@
           break;
         }
       }
-      if (image->alpha_trait == BlendPixelTrait)
+      if (image->alpha_trait != UndefinedPixelTrait)
         (void) FormatLocaleFile(file,"    Alpha: %.20g-bit\n",(double)
           channel_statistics[AlphaPixelChannel].depth);
       scale=1.0;
@@ -801,7 +801,7 @@
           break;
         }
       }
-      if (image->alpha_trait == BlendPixelTrait)
+      if (image->alpha_trait != UndefinedPixelTrait)
         (void) PrintChannelStatistics(file,AlphaPixelChannel,"Alpha",1.0/
           scale,channel_statistics);
       if (colorspace != GRAYColorspace)
@@ -849,7 +849,7 @@
           break;
         }
       }
-      if (image->alpha_trait == BlendPixelTrait)
+      if (image->alpha_trait != UndefinedPixelTrait)
         (void) PrintChannelMoments(file,AlphaPixelChannel,"Alpha",scale,
           channel_moments);
       if (colorspace != GRAYColorspace)
@@ -870,7 +870,7 @@
         channel_phash);
       (void) PrintChannelPerceptualHash(file,BluePixelChannel,"Blue, Luma",
         channel_phash);
-      if (image->alpha_trait == BlendPixelTrait)
+      if (image->alpha_trait != UndefinedPixelTrait)
         (void) PrintChannelPerceptualHash(file,AlphaPixelChannel,"Alpha, Alpha",
           channel_phash);
       channel_phash=(ChannelPerceptualHash *) RelinquishMagickMemory(
@@ -912,7 +912,7 @@
           break;
         }
       }
-      if (image->alpha_trait == BlendPixelTrait)
+      if (image->alpha_trait != UndefinedPixelTrait)
         (void) PrintChannelFeatures(file,AlphaPixelChannel,"Alpha",
           channel_features);
       channel_features=(ChannelFeatures *) RelinquishMagickMemory(
@@ -925,7 +925,7 @@
           GetMagickPrecision(),100.0*GetImageTotalInkDensity(image,exception)/
           (double) QuantumRange);
       x=0;
-      if (image->alpha_trait == BlendPixelTrait)
+      if (image->alpha_trait != UndefinedPixelTrait)
         {
           register const Quantum
             *p;
@@ -1015,7 +1015,7 @@
                 ConcatenateColorComponent(&pixel,BlackPixelChannel,
                   X11Compliance,tuple);
               }
-            if (pixel.alpha_trait == BlendPixelTrait)
+            if (pixel.alpha_trait != UndefinedPixelTrait)
               {
                 (void) ConcatenateMagickString(tuple,",",MaxTextExtent);
                 ConcatenateColorComponent(&pixel,AlphaPixelChannel,
diff --git a/MagickCore/image.c b/MagickCore/image.c
index 90fc91d..1f496ba 100644
--- a/MagickCore/image.c
+++ b/MagickCore/image.c
@@ -489,7 +489,7 @@
   next=GetNextImageInList(images);
   for ( ; next != (Image *) NULL; next=GetNextImageInList(next))
   {
-    if (next->alpha_trait == BlendPixelTrait)
+    if (next->alpha_trait != UndefinedPixelTrait)
       alpha_trait=BlendPixelTrait;
     number_images++;
     if (stack != MagickFalse)
@@ -3168,7 +3168,7 @@
   next=GetNextImageInList(image);
   for ( ; next != (Image *) NULL; next=GetNextImageInList(next))
   {
-    if (next->alpha_trait == BlendPixelTrait)
+    if (next->alpha_trait != UndefinedPixelTrait)
       alpha_trait=BlendPixelTrait;
     number_images++;
     if (stack != MagickFalse)
diff --git a/MagickCore/layer.c b/MagickCore/layer.c
index 9b58349..8ae53a2 100644
--- a/MagickCore/layer.c
+++ b/MagickCore/layer.c
@@ -105,7 +105,7 @@
 
   if (bounds->x < 0)
     return;
-  if (image->alpha_trait != BlendPixelTrait)
+  if (image->alpha_trait == UndefinedPixelTrait)
     (void) SetImageAlphaChannel(image,OpaqueAlphaChannel,exception);
   for (y=0; y < (ssize_t) bounds->height; y++)
   {
@@ -328,7 +328,7 @@
     previous=coalesce_image;
     coalesce_image=GetNextImageInList(coalesce_image);
     (void) CompositeImage(coalesce_image,next,
-      next->alpha_trait == BlendPixelTrait ? OverCompositeOp : CopyCompositeOp,
+      next->alpha_trait != UndefinedPixelTrait ? OverCompositeOp : CopyCompositeOp,
       MagickTrue,next->page.x,next->page.y,exception);
     (void) CloneImageProfiles(coalesce_image,next);
     (void) CloneImageProperties(coalesce_image,next);
@@ -423,7 +423,7 @@
         return((Image *) NULL);
       }
     (void) CompositeImage(current_image,next,
-      next->alpha_trait == BlendPixelTrait ? OverCompositeOp : CopyCompositeOp,
+      next->alpha_trait != UndefinedPixelTrait ? OverCompositeOp : CopyCompositeOp,
       MagickTrue,next->page.x,next->page.y,exception);
     /*
       Handle Background dispose: image is displayed for the delay period.
@@ -531,8 +531,8 @@
   if (method == CompareAnyLayer)
     return((MagickBooleanType)(IsFuzzyEquivalencePixelInfo(p,q) == MagickFalse));
 
-  o1 = (p->alpha_trait == BlendPixelTrait) ? p->alpha : OpaqueAlpha;
-  o2 = (q->alpha_trait == BlendPixelTrait) ? q->alpha : OpaqueAlpha;
+  o1 = (p->alpha_trait != UndefinedPixelTrait) ? p->alpha : OpaqueAlpha;
+  o2 = (q->alpha_trait != UndefinedPixelTrait) ? q->alpha : OpaqueAlpha;
   /*
     Pixel goes from opaque to transprency.
   */
@@ -1494,7 +1494,7 @@
         dispose_image=DestroyImage(dispose_image);
         return;
       }
-    (void) CompositeImage(current_image,next,next->alpha_trait == BlendPixelTrait ?
+    (void) CompositeImage(current_image,next,next->alpha_trait != UndefinedPixelTrait ?
       OverCompositeOp : CopyCompositeOp,MagickTrue,next->page.x,next->page.y,
       exception);
     /*
diff --git a/MagickCore/paint.c b/MagickCore/paint.c
index b876866..47a8c1a 100644
--- a/MagickCore/paint.c
+++ b/MagickCore/paint.c
@@ -178,8 +178,8 @@
     return(MagickFalse);
   if (IsGrayColorspace(image->colorspace) != MagickFalse)
     (void) SetImageColorspace(image,sRGBColorspace,exception);
-  if ((image->alpha_trait != BlendPixelTrait) &&
-      (draw_info->fill.alpha_trait == BlendPixelTrait))
+  if ((image->alpha_trait == UndefinedPixelTrait) &&
+      (draw_info->fill.alpha_trait != UndefinedPixelTrait))
     (void) SetImageAlpha(image,OpaqueAlpha,exception);
   /*
     Set floodfill state.
@@ -913,7 +913,7 @@
     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
   if (SetImageStorageClass(image,DirectClass,exception) == MagickFalse)
     return(MagickFalse);
-  if (image->alpha_trait != BlendPixelTrait)
+  if (image->alpha_trait == UndefinedPixelTrait)
     (void) SetImageAlphaChannel(image,OpaqueAlphaChannel,exception);
   /*
     Make image color transparent.
@@ -1041,7 +1041,7 @@
     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
   if (SetImageStorageClass(image,DirectClass,exception) == MagickFalse)
     return(MagickFalse);
-  if (image->alpha_trait != BlendPixelTrait)
+  if (image->alpha_trait == UndefinedPixelTrait)
     (void) SetImageAlphaChannel(image,OpaqueAlphaChannel,exception);
   /*
     Make image color transparent.
diff --git a/MagickCore/pixel-accessor.h b/MagickCore/pixel-accessor.h
index 8a1d5a6..977b9c1 100644
--- a/MagickCore/pixel-accessor.h
+++ b/MagickCore/pixel-accessor.h
@@ -454,16 +454,16 @@
 static inline MagickBooleanType IsPixelInfoEquivalent(
   const PixelInfo *restrict p,const PixelInfo *restrict q)
 {
-  if ((p->alpha_trait == BlendPixelTrait) &&
-      (q->alpha_trait != BlendPixelTrait) &&
+  if ((p->alpha_trait != UndefinedPixelTrait) &&
+      (q->alpha_trait == UndefinedPixelTrait) &&
       (AbsolutePixelValue(p->alpha-OpaqueAlpha) >= MagickEpsilon))
     return(MagickFalse);
-  if ((q->alpha_trait == BlendPixelTrait) &&
-      (p->alpha_trait != BlendPixelTrait) &&
+  if ((q->alpha_trait != UndefinedPixelTrait) &&
+      (p->alpha_trait == UndefinedPixelTrait) &&
       (AbsolutePixelValue(q->alpha-OpaqueAlpha)) >= MagickEpsilon)
     return(MagickFalse);
-  if ((p->alpha_trait == BlendPixelTrait) &&
-      (q->alpha_trait == BlendPixelTrait))
+  if ((p->alpha_trait != UndefinedPixelTrait) &&
+      (q->alpha_trait != UndefinedPixelTrait))
     {
       if (AbsolutePixelValue(p->alpha-q->alpha) >= MagickEpsilon)
         return(MagickFalse);
@@ -574,7 +574,7 @@
       ClampToQuantum(image->background_color.black);
   if (image->channel_map[AlphaPixelChannel].traits != UndefinedPixelTrait)
     pixel[image->channel_map[AlphaPixelChannel].offset]=
-      image->background_color.alpha_trait != BlendPixelTrait ? OpaqueAlpha :
+      image->background_color.alpha_trait == UndefinedPixelTrait ? OpaqueAlpha :
       ClampToQuantum(image->background_color.alpha);
 }
 
@@ -710,7 +710,7 @@
       ClampToQuantum(pixel_info->black);
   if (image->channel_map[AlphaPixelChannel].traits != UndefinedPixelTrait)
     pixel[image->channel_map[AlphaPixelChannel].offset]=
-      pixel_info->alpha_trait != BlendPixelTrait ? OpaqueAlpha :
+      pixel_info->alpha_trait == UndefinedPixelTrait ? OpaqueAlpha :
       ClampToQuantum(pixel_info->alpha);
 }
 
diff --git a/MagickCore/pixel.c b/MagickCore/pixel.c
index b6b3e26..34c43bd 100644
--- a/MagickCore/pixel.c
+++ b/MagickCore/pixel.c
@@ -237,8 +237,8 @@
       (IsGrayColorspace(image->colorspace) != MagickFalse))
     (void) TransformImageColorspace(image,sRGBColorspace,exception);
 #endif
-  if ((destination->alpha_trait == BlendPixelTrait) &&
-      (image->alpha_trait != BlendPixelTrait))
+  if ((destination->alpha_trait != UndefinedPixelTrait) &&
+      (image->alpha_trait == UndefinedPixelTrait))
     (void) SetImageAlpha(image,OpaqueAlpha,exception);
 }
 
@@ -4316,7 +4316,7 @@
   (void) ResetMagickMemory(image->channel_map,0,MaxPixelChannels*
     sizeof(*image->channel_map));
   trait=UpdatePixelTrait;
-  if (image->alpha_trait == BlendPixelTrait)
+  if (image->alpha_trait != UndefinedPixelTrait)
     trait=(PixelTrait) (trait | BlendPixelTrait);
   n=0;
   if (image->colorspace == GRAYColorspace)
@@ -5421,7 +5421,7 @@
 static inline void AlphaBlendPixelInfo(const Image *image,
   const Quantum *pixel,PixelInfo *pixel_info,double *alpha)
 {
-  if (image->alpha_trait != BlendPixelTrait)
+  if (image->alpha_trait == UndefinedPixelTrait)
     {
       *alpha=1.0;
       pixel_info->red=(double) GetPixelRed(image,pixel);
@@ -5931,7 +5931,7 @@
     destination->fuzz,(MagickRealType) MagickSQ1_2);
   scale=1.0;
   distance=0.0;
-  if (source->alpha_trait == BlendPixelTrait)
+  if (source->alpha_trait != UndefinedPixelTrait)
     {
       /*
         Transparencies are involved - set alpha distance
@@ -6049,14 +6049,14 @@
       MagickMax(q->fuzz,(MagickRealType) MagickSQ1_2);
   scale=1.0;
   distance=0.0;
-  if ((p->alpha_trait == BlendPixelTrait) ||
-      (q->alpha_trait == BlendPixelTrait))
+  if ((p->alpha_trait != UndefinedPixelTrait) ||
+      (q->alpha_trait != UndefinedPixelTrait))
     {
       /*
         Transparencies are involved - set alpha distance.
       */
-      pixel=(p->alpha_trait == BlendPixelTrait ? p->alpha : OpaqueAlpha)-
-        (q->alpha_trait == BlendPixelTrait ? q->alpha : OpaqueAlpha);
+      pixel=(p->alpha_trait != UndefinedPixelTrait ? p->alpha : OpaqueAlpha)-
+        (q->alpha_trait != UndefinedPixelTrait ? q->alpha : OpaqueAlpha);
       distance=pixel*pixel;
       if (distance > fuzz)
         return(MagickFalse);
@@ -6064,9 +6064,9 @@
         Generate a alpha scaling factor to generate a 4D cone on colorspace.
         If one color is transparent, distance has no color component.
       */
-      if (p->alpha_trait == BlendPixelTrait)
+      if (p->alpha_trait != UndefinedPixelTrait)
         scale=(QuantumScale*p->alpha);
-      if (q->alpha_trait == BlendPixelTrait)
+      if (q->alpha_trait != UndefinedPixelTrait)
         scale*=(QuantumScale*q->alpha);
       if (scale <= MagickEpsilon )
         return(MagickTrue);
@@ -6157,13 +6157,13 @@
     PixelChannel channel=GetPixelChannelChannel(image,i);
     SetPixelChannelTraits(image,channel,
       GetChannelBit(channel_mask,channel) == 0 ? CopyPixelTrait :
-      (image->alpha_trait == BlendPixelTrait) &&
+      (image->alpha_trait != UndefinedPixelTrait) &&
       (channel != AlphaPixelChannel) ?  (PixelTrait)
       (UpdatePixelTrait | BlendPixelTrait) : UpdatePixelTrait);
   }
   if (image->storage_class == PseudoClass)
     SetPixelChannelTraits(image,IndexPixelChannel,CopyPixelTrait);
-  if (image->alpha_trait != BlendPixelTrait)
+  if (image->alpha_trait == UndefinedPixelTrait)
     SetPixelChannelTraits(image,AlphaPixelChannel,image->alpha_trait);
   if (image->read_mask != MagickFalse)
     SetPixelChannelTraits(image,ReadMaskPixelChannel,CopyPixelTrait);
diff --git a/MagickCore/profile.c b/MagickCore/profile.c
index ef1a570..d73261a 100644
--- a/MagickCore/profile.c
+++ b/MagickCore/profile.c
@@ -1236,19 +1236,19 @@
             {
               case cmsSigRgbData:
               {
-                image->type=image->alpha_trait != BlendPixelTrait ?
+                image->type=image->alpha_trait == UndefinedPixelTrait ?
                   TrueColorType : TrueColorMatteType;
                 break;
               }
               case cmsSigCmykData:
               {
-                image->type=image->alpha_trait != BlendPixelTrait ?
+                image->type=image->alpha_trait == UndefinedPixelTrait ?
                   ColorSeparationType : ColorSeparationMatteType;
                 break;
               }
               case cmsSigGrayData:
               {
-                image->type=image->alpha_trait != BlendPixelTrait ?
+                image->type=image->alpha_trait == UndefinedPixelTrait ?
                   GrayscaleType : GrayscaleMatteType;
                 break;
               }
diff --git a/MagickCore/property.c b/MagickCore/property.c
index 046a8cc..0885e17 100644
--- a/MagickCore/property.c
+++ b/MagickCore/property.c
@@ -2366,7 +2366,7 @@
       (void) FormatLocaleString(value,MaxTextExtent,"%s %s %s",
         CommandOptionToMnemonic(MagickClassOptions,(ssize_t) image->storage_class),
         CommandOptionToMnemonic(MagickColorspaceOptions,(ssize_t) colorspace),
-        image->alpha_trait == BlendPixelTrait ? "Alpha" : "");
+        image->alpha_trait != UndefinedPixelTrait ? "Alpha" : "");
       break;
     }
     case 's': /* Image scene number */
@@ -2644,7 +2644,7 @@
             CommandOptionToMnemonic(MagickColorspaceOptions,(ssize_t)
             image->colorspace));
           LocaleLower(value);
-          if( image->alpha_trait == BlendPixelTrait )
+          if( image->alpha_trait != UndefinedPixelTrait )
             (void) ConcatenateMagickString(value,"a",MaxTextExtent);
           break;
         }
diff --git a/MagickCore/quantize.c b/MagickCore/quantize.c
index 03995fd..c107113 100644
--- a/MagickCore/quantize.c
+++ b/MagickCore/quantize.c
@@ -755,7 +755,7 @@
   MagickBooleanType
     associate_alpha;
 
-  associate_alpha=image->alpha_trait == BlendPixelTrait ? MagickTrue :
+  associate_alpha=image->alpha_trait != UndefinedPixelTrait ? MagickTrue :
     MagickFalse;
   if ((cube_info->quantize_info->number_colors == 2) &&
       (cube_info->quantize_info->colorspace == GRAYColorspace))
@@ -2246,7 +2246,7 @@
     for (x=0; x < (ssize_t) image->columns; x++)
     {
       index=1UL*GetPixelIndex(image,p);
-      if (image->alpha_trait == BlendPixelTrait)
+      if (image->alpha_trait != UndefinedPixelTrait)
         {
           alpha=(double) (QuantumScale*GetPixelAlpha(image,p));
           beta=(double) (QuantumScale*image->colormap[index].alpha);
@@ -2447,7 +2447,7 @@
           (image->colorspace == CMYKColorspace))
         SetPixelBlack(image,PosterizePixel(GetPixelBlack(image,q)),q);
       if (((GetPixelAlphaTraits(image) & UpdatePixelTrait) != 0) &&
-          (image->alpha_trait == BlendPixelTrait))
+          (image->alpha_trait != UndefinedPixelTrait))
         SetPixelAlpha(image,PosterizePixel(GetPixelAlpha(image,q)),q);
       q+=GetPixelChannels(image);
     }
@@ -2750,7 +2750,7 @@
     maximum_colors=MaxColormapSize;
   if (maximum_colors > MaxColormapSize)
     maximum_colors=MaxColormapSize;
-  if (image->alpha_trait != BlendPixelTrait)
+  if (image->alpha_trait == UndefinedPixelTrait)
     {
       if ((image->columns*image->rows) <= maximum_colors)
         (void) DirectToColormapImage(image,exception);
@@ -2774,7 +2774,7 @@
         colors>>=2;
       if ((quantize_info->dither_method != NoDitherMethod) && (depth > 2))
         depth--;
-      if ((image->alpha_trait == BlendPixelTrait) && (depth > 5))
+      if ((image->alpha_trait != UndefinedPixelTrait) && (depth > 5))
         depth--;
       if (IsImageGray(image,exception) != MagickFalse)
         depth=MaxTreeDepth;
diff --git a/MagickCore/quantum.c b/MagickCore/quantum.c
index b1659fd..e8fd9de 100644
--- a/MagickCore/quantum.c
+++ b/MagickCore/quantum.c
@@ -514,24 +514,24 @@
   if (image->debug != MagickFalse)
     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
   quantum_type=RGBQuantum;
-  if (image->alpha_trait == BlendPixelTrait)
+  if (image->alpha_trait != UndefinedPixelTrait)
     quantum_type=RGBAQuantum;
   if (image->colorspace == CMYKColorspace)
     {
       quantum_type=CMYKQuantum;
-      if (image->alpha_trait == BlendPixelTrait)
+      if (image->alpha_trait != UndefinedPixelTrait)
         quantum_type=CMYKAQuantum;
     }
   if (IsImageGray(image,exception) != MagickFalse)
     {
       quantum_type=GrayQuantum;
-      if (image->alpha_trait == BlendPixelTrait)
+      if (image->alpha_trait != UndefinedPixelTrait)
         quantum_type=GrayAlphaQuantum;
     }
   if (image->storage_class == PseudoClass)
     {
       quantum_type=IndexQuantum;
-      if (image->alpha_trait == BlendPixelTrait)
+      if (image->alpha_trait != UndefinedPixelTrait)
         quantum_type=IndexAlphaQuantum;
     }
   return(quantum_type);
diff --git a/MagickCore/resample.c b/MagickCore/resample.c
index 44eb278..04f4025 100644
--- a/MagickCore/resample.c
+++ b/MagickCore/resample.c
@@ -545,7 +545,7 @@
   pixel->red = pixel->green = pixel->blue = 0.0;
   if (pixel->colorspace == CMYKColorspace)
     pixel->black = 0.0;
-  if (pixel->alpha_trait == BlendPixelTrait)
+  if (pixel->alpha_trait != UndefinedPixelTrait)
     pixel->alpha = 0.0;
 
   /*
@@ -610,7 +610,7 @@
         pixel->alpha  += weight*GetPixelAlpha(resample_filter->image,pixels);
         divisor_m += weight;
 
-        if (pixel->alpha_trait == BlendPixelTrait)
+        if (pixel->alpha_trait != UndefinedPixelTrait)
           weight *= QuantumScale*((double) GetPixelAlpha(resample_filter->image,pixels));
         pixel->red   += weight*GetPixelRed(resample_filter->image,pixels);
         pixel->green += weight*GetPixelGreen(resample_filter->image,pixels);
diff --git a/MagickCore/resize.c b/MagickCore/resize.c
index 0ca8389..e3be9b3 100644
--- a/MagickCore/resize.c
+++ b/MagickCore/resize.c
@@ -2892,7 +2892,7 @@
       filter_type=PointFilter;
     else
       if ((image->storage_class == PseudoClass) ||
-          (image->alpha_trait == BlendPixelTrait) ||
+          (image->alpha_trait != UndefinedPixelTrait) ||
           ((x_factor*y_factor) > 1.0))
         filter_type=MitchellFilter;
   resize_filter=AcquireResizeFilter(image,filter_type,MagickFalse,exception);
@@ -3697,7 +3697,7 @@
   if (thumbnail_image == (Image *) NULL)
     return(thumbnail_image);
   (void) ParseAbsoluteGeometry("0x0+0+0",&thumbnail_image->page);
-  if (thumbnail_image->alpha_trait != BlendPixelTrait)
+  if (thumbnail_image->alpha_trait == UndefinedPixelTrait)
     (void) SetImageAlphaChannel(thumbnail_image,OpaqueAlphaChannel,exception);
   thumbnail_image->depth=8;
   thumbnail_image->interlace=NoInterlace;
diff --git a/MagickCore/shear.c b/MagickCore/shear.c
index 56e9cea..e46d004 100644
--- a/MagickCore/shear.c
+++ b/MagickCore/shear.c
@@ -1624,7 +1624,7 @@
       integral_image=DestroyImage(integral_image);
       return(integral_image);
     }
-  if (integral_image->alpha_trait != BlendPixelTrait)
+  if (integral_image->alpha_trait == UndefinedPixelTrait)
     (void) SetImageAlphaChannel(integral_image,OpaqueAlphaChannel,exception);
   /*
     Compute image size.
@@ -1648,7 +1648,7 @@
   /*
     Shear the image.
   */
-  if (shear_image->alpha_trait != BlendPixelTrait)
+  if (shear_image->alpha_trait == UndefinedPixelTrait)
     (void) SetImageAlphaChannel(shear_image,OpaqueAlphaChannel,exception);
   status=XShearImage(shear_image,shear.x,image->columns,image->rows,bounds.x,
     (ssize_t) (shear_image->rows-image->rows)/2,exception);
@@ -1769,7 +1769,7 @@
       integral_image=DestroyImage(integral_image);
       return(integral_image);
     }
-  if (integral_image->alpha_trait != BlendPixelTrait)
+  if (integral_image->alpha_trait == UndefinedPixelTrait)
     (void) SetImageAlphaChannel(integral_image,OpaqueAlphaChannel,exception);
   /*
     Compute maximum bounds for 3 shear operations.
diff --git a/MagickCore/transform.c b/MagickCore/transform.c
index cab89da..eabb8ad 100644
--- a/MagickCore/transform.c
+++ b/MagickCore/transform.c
@@ -1748,8 +1748,8 @@
   if ((IsPixelInfoGray(&splice_image->background_color) == MagickFalse) &&
       (IsGrayColorspace(splice_image->colorspace) != MagickFalse))
     (void) SetImageColorspace(splice_image,sRGBColorspace,exception);
-  if ((splice_image->background_color.alpha_trait == BlendPixelTrait) &&
-      (splice_image->alpha_trait != BlendPixelTrait))
+  if ((splice_image->background_color.alpha_trait != UndefinedPixelTrait) &&
+      (splice_image->alpha_trait == UndefinedPixelTrait))
     (void) SetImageAlpha(splice_image,OpaqueAlpha,exception);
   (void) SetImageBackgroundColor(splice_image,exception);
   /*
diff --git a/MagickCore/xwindow.c b/MagickCore/xwindow.c
index e877be8..27b2a4b 100644
--- a/MagickCore/xwindow.c
+++ b/MagickCore/xwindow.c
@@ -697,7 +697,7 @@
   (void) XParseGeometry(annotate_info->geometry,&x,&y,&width,&height);
   alpha_trait=image->alpha_trait;
   (void) CompositeImage(image,annotate_image,
-    annotate_image->alpha_trait == BlendPixelTrait ? OverCompositeOp :
+    annotate_image->alpha_trait != UndefinedPixelTrait ? OverCompositeOp :
     CopyCompositeOp,MagickTrue,(ssize_t) x,(ssize_t) y,exception);
   image->alpha_trait=alpha_trait;
   annotate_image=DestroyImage(annotate_image);
@@ -5728,7 +5728,7 @@
   window->ximage=ximage;
   matte_image=(XImage *) NULL;
   if ((window->shape != MagickFalse) && (window->image != (Image *) NULL))
-    if ((window->image->alpha_trait == BlendPixelTrait) &&
+    if ((window->image->alpha_trait != UndefinedPixelTrait) &&
         ((int) width <= XDisplayWidth(display,window->screen)) &&
         ((int) height <= XDisplayHeight(display,window->screen)))
       {
@@ -5914,7 +5914,7 @@
     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
   canvas=image;
   if ((window->immutable == MagickFalse) &&
-      (image->storage_class == DirectClass) && (image->alpha_trait == BlendPixelTrait))
+      (image->storage_class == DirectClass) && (image->alpha_trait != UndefinedPixelTrait))
     {
       char
         size[MaxTextExtent];
@@ -6530,7 +6530,7 @@
     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
   canvas=image;
   if ((window->immutable != MagickFalse) &&
-      (image->storage_class == DirectClass) && (image->alpha_trait == BlendPixelTrait))
+      (image->storage_class == DirectClass) && (image->alpha_trait != UndefinedPixelTrait))
     {
       char
         size[MaxTextExtent];
@@ -7514,7 +7514,7 @@
       (void) ConcatenateMagickString(tuple,",",MaxTextExtent);
       ConcatenateColorComponent(&pixel,BlackPixelChannel,X11Compliance,tuple);
     }
-  if (pixel.alpha_trait == BlendPixelTrait)
+  if (pixel.alpha_trait != UndefinedPixelTrait)
     {
       (void) ConcatenateMagickString(tuple,",",MaxTextExtent);
       ConcatenateColorComponent(&pixel,AlphaPixelChannel,X11Compliance,tuple);
@@ -7771,7 +7771,7 @@
       number_colors=(unsigned int) (map_info->base_pixel+
         (map_info->red_max+1)*(map_info->green_max+1)*(map_info->blue_max+1));
       if ((map_info->red_max*map_info->green_max*map_info->blue_max) != 0)
-        if ((image->alpha_trait != BlendPixelTrait) &&
+        if ((image->alpha_trait == UndefinedPixelTrait) &&
             (resource_info->color_recovery == MagickFalse) &&
             (resource_info->quantize_info->dither_method != NoDitherMethod) &&
             (number_colors < MaxColormapSize))