title: Contributions of the opponent mechanisms to brightness and nonlinear models.
abstract: Additivity of heterochromatic brightness matching was investigated between unique-green and red (660 nm), and between unique-blue and unique-yellow with 2-deg bipartite field composed of a 100 td white reference field and a bichromatic mixture field. Ten subjects participated in the measurements and the results showed wide varieties among subjects. Previous models for brightness perception based on the contributions of red-green and yellow-blue opponent channels can explain some properties of the results, but they fail to explain other aspects. To overcome the difficulties, a new model is proposed for the brightness perception at photopic levels.
authors.affiliation: Department of Information Processing, Tokyo Institute of Technology Graduate School, Yokohama, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Nakano
authors.forename: M
authors.initials: M
authors.lastname: Ikeda
authors.forename: P K
authors.initials: PK
authors.lastname: Kaiser
mesh_terms: D000328:Adult; D003118:Color Perception / Q000502:physiology*; D006801:Humans; D008027:Light; D008297:Male; D008433:Mathematics; D008875:Middle Aged; D008954:Models, Biological