From c5dbc061585d898c1cb3061831f201faf83687e4 Mon Sep 17 00:00:00 2001
From: Maria Dimashova <maria.dimashova@gmail.com>
Date: Tue, 24 Jul 2012 17:51:20 +0400
Subject: [PATCH] fixed bilateralFilter on uniform CV_32F image

---
 modules/imgproc/src/smooth.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/modules/imgproc/src/smooth.cpp b/modules/imgproc/src/smooth.cpp
index d93ac5e52c..faec530b85 100644
--- a/modules/imgproc/src/smooth.cpp
+++ b/modules/imgproc/src/smooth.cpp
@@ -1425,6 +1425,11 @@ bilateralFilter_32f( const Mat& src, Mat& dst, int d,
     // compute the min/max range for the input image (even if multichannel)
 
     minMaxLoc( src.reshape(1), &minValSrc, &maxValSrc );
+    if(std::abs(minValSrc - maxValSrc) < FLT_EPSILON)
+    {
+        src.copyTo(dst);
+        return;
+    }
 
     // temporary copy of the image with borders for easy processing
     Mat temp;