fix getDefaultName()

modules/cudaoptflow/src/brox.cpp

@@ -64,6 +64,8 @@ namespace {
         {
         }
 
+        virtual String getDefaultName() const { return "DenseOpticalFlow.BroxOpticalFlow"; }
+
         virtual void calc(InputArray I0, InputArray I1, InputOutputArray flow, Stream& stream);
 
         virtual double getFlowSmoothness() const { return alpha_; }

modules/cudaoptflow/src/farneback.cpp

@@ -129,6 +129,8 @@ namespace
 
         virtual void calc(InputArray I0, InputArray I1, InputOutputArray flow, Stream& stream);
 
+        virtual String getDefaultName() const { return "DenseOpticalFlow.FarnebackOpticalFlow"; }
+
     private:
         int numLevels_;
         double pyrScale_;

modules/cudaoptflow/src/pyrlk.cpp

@@ -347,6 +347,8 @@ namespace
                 sparse(prevImg, nextImg, prevPts, nextPts, status, err, stream);
             }
         }
+
+        virtual String getDefaultName() const { return "SparseOpticalFlow.SparsePyrLKOpticalFlow"; }
     };
 
     class DensePyrLKOpticalFlowImpl : public DensePyrLKOpticalFlow, private PyrLKOpticalFlowBase
@@ -388,6 +390,8 @@ namespace
             GpuMat flows[] = {u, v};
             cuda::merge(flows, 2, _flow, stream);
         }
+
+        virtual String getDefaultName() const { return "DenseOpticalFlow.DensePyrLKOpticalFlow"; }
     };
 }
 

modules/cudaoptflow/src/tvl1flow.cpp

@@ -119,6 +119,9 @@ namespace
 
         virtual void calc(InputArray I0, InputArray I1, InputOutputArray flow, Stream& stream);
 
+        virtual String getDefaultName() const { return "DenseOpticalFlow.OpticalFlowDual_TVL1"; }
+
+
     private:
         double tau_;
         double lambda_;