diff --git a/MagickCore/compare.c b/MagickCore/compare.c
index 6e23f720fa..5a6396605b 100644
--- a/MagickCore/compare.c
+++ b/MagickCore/compare.c
@@ -1772,11 +1772,9 @@ static MagickBooleanType GetStructuralSimilarityDistortion(const Image *image,
         ((reconstruct_traits & UpdatePixelTrait) == 0))
       continue;
     distortion[l]*=area;
-    distortion[l]=1.0-distortion[l];
   }
   distortion[CompositePixelChannel]*=area;
   distortion[CompositePixelChannel]/=(double) GetImageChannels(image);
-  distortion[CompositePixelChannel]=1.0-distortion[CompositePixelChannel];
   kernel_info=DestroyKernelInfo(kernel_info);
   return(status);
 }
@@ -4119,7 +4117,6 @@ MagickExport Image *SimilarityImage(const Image *image,const Image *reconstruct,
         case NormalizedCrossCorrelationErrorMetric:
         case PeakSignalToNoiseRatioErrorMetric:
         case PhaseCorrelationErrorMetric:
-        case StructuralDissimilarityErrorMetric:
         {
           if (similarity > channel_info.similarity)
             update=MagickTrue;
@@ -4153,7 +4150,6 @@ MagickExport Image *SimilarityImage(const Image *image,const Image *reconstruct,
           case NormalizedCrossCorrelationErrorMetric:
           case PeakSignalToNoiseRatioErrorMetric:
           case PhaseCorrelationErrorMetric:
-          case StructuralDissimilarityErrorMetric:
           {
             SetPixelChannel(similarity_image,channel,ClampToQuantum((double)
               QuantumRange*similarity),q);
@@ -4178,7 +4174,6 @@ MagickExport Image *SimilarityImage(const Image *image,const Image *reconstruct,
       case NormalizedCrossCorrelationErrorMetric:
       case PeakSignalToNoiseRatioErrorMetric:
       case PhaseCorrelationErrorMetric:
-      case StructuralDissimilarityErrorMetric:
       {
         if (similarity_threshold != DefaultSimilarityThreshold)
           if (channel_info.similarity >= similarity_threshold)
diff --git a/MagickWand/compare.c b/MagickWand/compare.c
index 6aa6f4a87d..67474e3717 100644
--- a/MagickWand/compare.c
+++ b/MagickWand/compare.c
@@ -1244,7 +1244,6 @@ WandExport MagickBooleanType CompareImagesCommand(ImageInfo *image_info,
                 case NormalizedCrossCorrelationErrorMetric:
                 case PeakSignalToNoiseRatioErrorMetric:
                 case PhaseCorrelationErrorMetric:
-                case StructuralDissimilarityErrorMetric:
                 {
                   similarity_metric=1.0-similarity_metric;
                   break;
@@ -1275,6 +1274,11 @@ WandExport MagickBooleanType CompareImagesCommand(ImageInfo *image_info,
       scale=(double) columns*rows;
       break;
     }
+    case StructuralDissimilarityErrorMetric:
+    {
+      distortion=MagickMax(distortion,0.0);
+      break;
+    }
     case DotProductCorrelationErrorMetric:
     case PhaseCorrelationErrorMetric:
     {