BufferPSNR         30 samples/cpp/tutorial_code/gpu/gpu-basics-similarity/gpu-basics-similarity.cpp double getPSNR_CUDA_optimized(const Mat& I1, const Mat& I2, BufferPSNR& b);
BufferPSNR         77 samples/cpp/tutorial_code/gpu/gpu-basics-similarity/gpu-basics-similarity.cpp     BufferPSNR bufferPSNR;
BufferPSNR        196 samples/cpp/tutorial_code/gpu/gpu-basics-similarity/gpu-basics-similarity.cpp double getPSNR_CUDA_optimized(const Mat& I1, const Mat& I2, BufferPSNR& b)