RgbToG            502 samples/gpu/opticalflow_nvidia_api.cpp     ncvAssertReturnNcvStat (CopyData<RgbToG> (firstFrame, h_g));
RgbToG            510 samples/gpu/opticalflow_nvidia_api.cpp     ncvAssertReturnNcvStat (CopyData<RgbToG> (lastFrame, h_g));