Psychology of Perception by Simon Grondin

Author:Simon Grondin
Language: eng
Format: epub, pdf
Publisher: Springer International Publishing, Cham

With such a two-level system, it is possible to explain hue with the excitation of the R+G−, R−G+, B+Y− and B−Y+ opponent processes. These processes also help explain why complementary colors cannot coexist. For example, we cannot perceive greenish red, but perceiving greenish blue makes sense (if the S and M cones are excited). Brightness would be explained by the activity of non-opponent white-black and black-white cells. Finally, saturation would depend on the fact that the activity of the opponent processes would be higher than the one of the White + Black− system.

Finally, color perception probably also depends on other complex mechanisms. Researchers have identified, in the striate cortex, clusters of cells that react only to colors (Livingstone & Hubel, 1987; Michael, 1978). A property of these cells is to have double-opponent receptive fields.

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