From c48b5e5dc83523377085b53668d584a66d2968f4 Mon Sep 17 00:00:00 2001
From: Cristy <urban-warrior@imagemagick.org>
Date: Mon, 27 Feb 2017 07:43:39 -0500
Subject: [PATCH] ...

---
 MagickCore/compare.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/MagickCore/compare.c b/MagickCore/compare.c
index 0e844825f..5cdbd89e7 100644
--- a/MagickCore/compare.c
+++ b/MagickCore/compare.c
@@ -1212,8 +1212,13 @@ static MagickBooleanType GetPeakSignalToNoiseRatio(const Image *image,
 
   status=GetMeanSquaredDistortion(image,reconstruct_image,distortion,exception);
   for (i=0; i <= MaxPixelChannels; i++)
-    if (fabs(distortion[i]) >= MagickEpsilon)
-      distortion[i]=20.0*MagickLog10((double) 1.0/sqrt(distortion[i]));
+  {
+    double
+      gamma;
+
+    gamma=PerceptibleReciprocal(sqrt(distortion[i]));
+    distortion[i]=20.0*MagickLog10(gamma);
+  }
   return(status);
 }
 
-- 
2.40.0