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diff --git a/MagickCore/effect.c b/MagickCore/effect.c
index b56e0067b3ac377ca4bf3f1b89646912eed6adaf..ad5d5e759a560e829edcfa6b21d9e61cd74518fb 100644 (file)
--- a/MagickCore/effect.c
+++ b/MagickCore/effect.c
@@ -1244,8 +1244,8 @@ MagickExport Image *CannyEdgeImage(const Image *image,const double radius,
           /*
             135 degrees, northeast and southwest.
           */
-          (void) GetMatrixElement(pixel_cache,x-1,y+1,&alpha_pixel);
           (void) GetMatrixElement(pixel_cache,x+1,y-1,&beta_pixel);
+          (void) GetMatrixElement(pixel_cache,x-1,y+1,&alpha_pixel);
           break;
         }
       }