title: Color appearance: the effects of illumination and spatial pattern.
abstract: The color we perceive at each point in an image depends on information spread across the three spatial arrays of cone photoreceptors. I describe experiments aimed at clarifying how information is integrated across the spatial arrays to yield a color experience. We have found that changes of color appearance due to changes of the ambient illumination and the pattern's spatial frequency can be described by using a simple set of optical and neural transformations. Each transformation can be thought of as having two parts. First, the transformation converts the color representation into a new coordinate frame that is independent of the image contents. Second, the transformation scales the neural responses in the new coordinate frame by a gain factor that depends on the image contents.
authors.affiliation: Psychology Department, Stanford University, CA 94305.
authors.forename: B A
authors.initials: BA
authors.lastname: Wandell
mesh_terms: D003116:Color; D003118:Color Perception / Q000502:physiology*; D006801:Humans; D008029:Lighting; D009799:Ocular Physiological Phenomena; D055095:Optics and Photonics; D010364:Pattern Recognition, Visual / Q000502:physiology; D010775:Photic Stimulation