From c9efcf8d1fd5e520d42bd4b247c36e9bc8b2d60e Mon Sep 17 00:00:00 2001
From: Alexander Shishkov <no@email>
Date: Wed, 28 Mar 2012 15:12:12 +0000
Subject: [PATCH] fixed #1616

---
 modules/imgproc/src/histogram.cpp | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/modules/imgproc/src/histogram.cpp b/modules/imgproc/src/histogram.cpp
index 960a26f..546c215 100644
--- a/modules/imgproc/src/histogram.cpp
+++ b/modules/imgproc/src/histogram.cpp
@@ -1350,7 +1350,18 @@ void cv::calcBackProject( InputArrayOfArrays images, const vector<int>& channels
                           const vector<float>& ranges,
                           double scale )
 {
-    Mat H = hist.getMat();
+    Mat H0 = hist.getMat(), H;
+    int hcn = H0.channels();
+    if( hcn > 1 )
+    {
+        CV_Assert( H0.isContinuous() );
+        int hsz[CV_CN_MAX+1];
+        memcpy(hsz, &H0.size[0], H0.dims*sizeof(hsz[0]));
+        hsz[H0.dims] = hcn;
+        H = Mat(H0.dims+1, hsz, H0.depth(), H0.data);
+    }
+    else
+        H = H0;
     bool _1d = H.rows == 1 || H.cols == 1;
     int i, dims = H.dims, rsz = (int)ranges.size(), csz = (int)channels.size();
     int nimages = (int)images.total();
-- 
2.7.4