ConvertYCbCrToRGB 2133 magick/colorspace.c               ConvertYCbCrToRGB(X,Y,Z,&red,&green,&blue);
ConvertYCbCrToRGB  515 tests/validate.c   ConvertYCbCrToRGB(0.783460,0.319581,0.330539,&r,&g,&b);