From 61fe623cf15b342447b6983d930c711288ad5cfe Mon Sep 17 00:00:00 2001
From: Adrien BAK <adrien.bak@gmail.com>
Date: Tue, 30 Sep 2014 15:15:02 +0900
Subject: [PATCH] backport bug fix

---
 modules/photo/src/seamless_cloning_impl.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/modules/photo/src/seamless_cloning_impl.cpp b/modules/photo/src/seamless_cloning_impl.cpp
index f414dee83..71ebe0ffa 100644
--- a/modules/photo/src/seamless_cloning_impl.cpp
+++ b/modules/photo/src/seamless_cloning_impl.cpp
@@ -512,10 +512,12 @@ void Cloning::illum_change(Mat &I, Mat &mask, Mat &wmask, Mat &cloned, float alp
     multiply(patchGradientX,pow(alpha,beta),multX);
     pow(mag,-1*beta, multx_temp);
     multiply(multX,multx_temp, patchGradientX);
+    patchNaNs(patchGradientX);
 
     multiply(patchGradientY,pow(alpha,beta),multY);
     pow(mag,-1*beta, multy_temp);
     multiply(multY,multy_temp,patchGradientY);
+    patchNaNs(patchGradientY);
 
     Mat zeroMask = (patchGradientX != 0);