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diff --git a/MagickCore/effect.c b/MagickCore/effect.c
index 901775c5c495c5bf1b761c34fe03195fda4f0cf7..9c1bae33a0be9d5e7030e42b8ebf3ad1f3b77666 100644 (file)
--- a/MagickCore/effect.c
+++ b/MagickCore/effect.c
@@ -1053,6 +1053,11 @@ MagickExport Image *CannyEdgeImage(const Image *image,const double radius,
       edge_image=DestroyImage(edge_image);
       return((Image *) NULL);
     }
+  if (NormalizeImage(edge_image,exception) == MagickFalse)
+    {
+      edge_image=DestroyImage(edge_image);
+      return((Image *) NULL);
+    }
   /*
     Find the intensity gradient of the image.
   */