Visual detection analysed in terms of luminance and chromatic signals.
D003118:Color Perception / Q000502:physiology*; D004056:Differential Threshold; D006801:Humans; D008027:Light; D008959:Models, Neurological; D010775:Photic Stimulation; D010786:Photoreceptor Cells / Q000502:physiology; D014796:Visual Perception / Q000502:physiology*