Flicker photometry and achromatic-channel structure.
It is widely assumed that the near-perfect additivity of heterochromatic flicker photometry implies the existence of an achromatic channel in the visual system, which accurately sums R- and G-cone signals. For flicker photometry to be additive, the channel that detects the flicker stimulus need not add cone signals.
Ingling
C R
CR
Tsou
B H
BH
D003118:Color Perception / Q000502:physiology*; D005425:Flicker Fusion / Q000502:physiology*; D006801:Humans; D010783:Photometry; D010786:Photoreceptor Cells / Q000502:physiology*; D011601:Psychophysics; D009435:Synaptic Transmission