ConvertYUVToRGB  1915 magick/colorspace.c               ConvertYUVToRGB(X,Y,Z,&red,&green,&blue);
ConvertYUVToRGB   850 tests/validate.c   ConvertYUVToRGB(0.783460,-0.157383+0.5,-0.208443+0.5,&r,&g,&b);