RgbToB 503 samples/gpu/opticalflow_nvidia_api.cpp ncvAssertReturnNcvStat (CopyData<RgbToB> (firstFrame, h_b)); RgbToB 511 samples/gpu/opticalflow_nvidia_api.cpp ncvAssertReturnNcvStat (CopyData<RgbToB> (lastFrame, h_b));