From: Cristy <urban-warrior@imagemagick.org>
Date: Mon, 27 Feb 2017 12:43:39 +0000 (-0500)
Subject: ...
X-Git-Tag: 7.0.5-1~16
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=c48b5e5dc83523377085b53668d584a66d2968f4;p=imagemagick

...
---

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);
 }