From: Cristy <urban-warrior@imagemagick.org>
Date: Fri, 8 Dec 2017 23:50:55 +0000 (-0500)
Subject: https://www.imagemagick.org/discourse-server/viewtopic.php?f=3&t=33199
X-Git-Tag: 7.0.7-15~28
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=610895a488620827b770e1a571cd9d72fd20c90a;p=imagemagick

https://www.imagemagick.org/discourse-server/viewtopic.php?f=3&t=33199
---

diff --git a/MagickCore/statistic.c b/MagickCore/statistic.c
index b8419831d..cc6b5aa1f 100644
--- a/MagickCore/statistic.c
+++ b/MagickCore/statistic.c
@@ -2139,6 +2139,19 @@ MagickExport ChannelStatistics *GetImageStatistics(const Image *image,
       channel_statistics[i].mean)*(standard_deviation*standard_deviation*
       standard_deviation*standard_deviation)-3.0;
   }
+  channel_statistics[CompositePixelChannel].mean=0.0;
+  channel_statistics[CompositePixelChannel].standard_deviation=0.0;
+  for (i=0; i < (ssize_t) MaxPixelChannels; i++)
+  {
+    channel_statistics[CompositePixelChannel].mean+=
+      channel_statistics[i].mean;
+    channel_statistics[CompositePixelChannel].standard_deviation+=
+      channel_statistics[i].standard_deviation;
+  }
+  channel_statistics[CompositePixelChannel].mean/=(double)
+    GetImageChannels(image);
+  channel_statistics[CompositePixelChannel].standard_deviation/=(double)
+    GetImageChannels(image);
   if (y < (ssize_t) image->rows)
     channel_statistics=(ChannelStatistics *) RelinquishMagickMemory(
       channel_statistics);