Chromaticity diagram showing cone excitation by stimuli of equal luminance.
In a space where Cartesian coordinates represent the excitations of the three cone types involved in color vision, a plane of constant luminance provides a chromaticity diagram in which excitation of each cone type (at constant luminance) is represented by a linear scale (horizontal or vertical), and in which the center-of-gravity rule applies with weights proportional to luminance.
D003118:Color Perception / Q000502:physiology*; D006801:Humans; D008027:Light; D008433:Mathematics; D008954:Models, Biological; D010775:Photic Stimulation; D010786:Photoreceptor Cells / Q000502:physiology*