Ch.6: Color Perception Flashcards
Spectral Reflection
The ratio of light reflected by an object at each wavelength
Hue
The color quality of light; EX. Orange green indigo, cyan
Quality
A value that changes what does not make the value larger or smaller
Saturation
The purity of light
Brightness
Perceived intensity of light presented
Lightness
Psychological experience of the amount of light that gets reflected by a surface
Metamer
A psychophysical color match between two patches of light that have different sets of wavelength
Univariance
Principle whereby any single cone system is color blind in the sense that different combinations of wavelength and intensity can result in the same response from the current system
Simultaneous Color Contrast
A phenomenon that occurs when our perception of one color is affected by a color that surrounds it
Hue Cancellation
An experiment in which observers cancel out the perception of a particular color by adding light of the opponent color
Unique Colors
Red, green, blue, and yellow
Cone-Opponent Cells
Neurons that are excited by the input from one cone type in the center, but inhibited by the input from another cone type in the surround
Double-Opponent Cells
Cells that have a Center, which is excited by one color and inhibited by the other
Anomalous Trichromacy
A condition in which all three cone systems are intact, but one or more, has an altered absorption pattern leading to different metameric matches than a most common type of trichromatic individuals
Unilateral Dichromacy
The presence of dichromacy in one eye, but trichromatic vision in the other eye
