diff --git a/modules/cudaoptflow/include/opencv2/cudaoptflow.hpp b/modules/cudaoptflow/include/opencv2/cudaoptflow.hpp
index 220bb34573..2cd78fac54 100644
--- a/modules/cudaoptflow/include/opencv2/cudaoptflow.hpp
+++ b/modules/cudaoptflow/include/opencv2/cudaoptflow.hpp
@@ -210,6 +210,11 @@ public:
      * In theory, it should have a small value in order to maintain both parts in correspondence.
      * The method is stable for a large range of values of this parameter.
      */
+
+	double gamma;
+	/**
+	* parameter for robustness
+	*/
     double theta;
 
     /**
@@ -241,12 +246,13 @@ public:
     bool useInitialFlow;
 
 private:
-    void procOneScale(const GpuMat& I0, const GpuMat& I1, GpuMat& u1, GpuMat& u2);
+    void procOneScale(const GpuMat& I0, const GpuMat& I1, GpuMat& u1, GpuMat& u2, GpuMat& u3);
 
     std::vector<GpuMat> I0s;
     std::vector<GpuMat> I1s;
     std::vector<GpuMat> u1s;
-    std::vector<GpuMat> u2s;
+	std::vector<GpuMat> u2s;
+	std::vector<GpuMat> u3s;
 
     GpuMat I1x_buf;
     GpuMat I1y_buf;
@@ -261,7 +267,9 @@ private:
     GpuMat p11_buf;
     GpuMat p12_buf;
     GpuMat p21_buf;
-    GpuMat p22_buf;
+	GpuMat p22_buf;
+	GpuMat p31_buf;
+	GpuMat p32_buf;
 
     GpuMat diff_buf;
     GpuMat norm_buf;