ConvertLabToXYZ 1510 magick/colorspace.c ConvertLabToXYZ(100.0*L,255.0*(a-0.5),255.0*(b-0.5),&X,&Y,&Z); ConvertLabToXYZ 757 magick/gem.c ConvertLabToXYZ(luma,chroma*cos(hue*MagickPI/180.0),chroma* ConvertLabToXYZ 203 tests/validate.c ConvertLabToXYZ(L*100.0,255.0*(a-0.5),255.0*(b-0.5),&X,&Y,&Z);