Measuring Colour

adapting additive amounts angle appearance Appl applications approximately blue brightness Calculate changes chromaticity Color Res Colorimetric colour colour difference cones considered constant correlated corresponding curve daylight diagram diffuser effect equal errors evaluated example factor field filter fluorescent flux follows formula function geometry given green grey hence illuminant included increase indicate interval known lamps less levels light light sources lines luminance match measures metamerism method mixture Munsell normal observer obtained perfect photopic positive possible produced radiance factor radiation range ratio reference white reflectance relative spectral power represent responses samples saturation scale scotopic seen sensitivity shown signal similar space specification spectral power distribution spectrum Standard Standard Illuminant Step stimulus surface Table transmitting tristimulus values tungsten types typical unique units usually viewing vision wavelength weights yellow