COLOR_GRAY2RGB   1372 modules/calib3d/src/circlesgrid.cpp     cvtColor(srcImage, drawImage, COLOR_GRAY2RGB);
COLOR_GRAY2RGB    123 samples/winrt_universal/VideoCaptureXAML/video_capture_xaml/video_capture_xaml.Shared/main.cpp         cvtColor(edges, frame, COLOR_GRAY2RGB);