From 20bf88bad1eb8348b08482c0dafba97d9635364a Mon Sep 17 00:00:00 2001
From: Seon-Wook Park <seon.wook@swook.net>
Date: Wed, 1 Jul 2015 09:34:27 +0900
Subject: [PATCH] spatialGradient: Make kern args const&

---
 modules/imgproc/src/spatialgradient.cpp | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/modules/imgproc/src/spatialgradient.cpp b/modules/imgproc/src/spatialgradient.cpp
index df88a7b1bf..b4dc032acb 100644
--- a/modules/imgproc/src/spatialgradient.cpp
+++ b/modules/imgproc/src/spatialgradient.cpp
@@ -59,9 +59,9 @@ namespace cv
  */
 template <typename T>
 static inline void spatialGradientKernel( T& vx, T& vy,
-                                          T v00, T v01, T v02,
-                                          T v10,        T v12,
-                                          T v20, T v21, T v22 )
+                                          const T& v00, const T& v01, const T& v02,
+                                          const T& v10,               const T& v12,
+                                          const T& v20, const T& v21, const T& v22 )
 {
     // vx = (v22 - v00) + (v02 - v20) + 2 * (v12 - v10)
     // vy = (v22 - v00) + (v20 - v02) + 2 * (v21 - v01)