Don't deactivate alpha channel

diff --git a/MagickCore/compare.c b/MagickCore/compare.c
index 3b9147762ee07ef7d36575ceaa6778ca775f6e69..4fec572498a7ce5bcd115ed08e7c845214fc8497 100644 (file)
--- a/MagickCore/compare.c
+++ b/MagickCore/compare.c
@@ -2312,7 +2312,6 @@ MagickExport Image *SimilarityImage(const Image *image,const Image *reference,
       }
   }
   similarity_view=DestroyCacheView(similarity_view);
-  (void) SetImageAlphaChannel(similarity_image,OffAlphaChannel,exception);
   if (status == MagickFalse)
     similarity_image=DestroyImage(similarity_image);
   return(similarity_image);