2 hue the dimension of color that is determined by

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(2) Hue- the dimension of color that is determined by the wavelength of light. (3) Intensity- the amount of energy in a light or sound wave, which we perceive as brightness or loudness, as determined by the wave’s amplitude. ii) The Eye (1) Retina- the light-sensitive inner surface of the eye, containing the receptor rods and cones plus layers of neurons that begin the processing of visual information. (2) Accommodation- the process by which the eye’s lens changes shape to focus near or far objects on the retina. (3) The Retina (a) Rods- retinal receptors that detect black, white, and gray; necessary for peripheral and twilight vision, when comes don’t respond. (b) Cones- retinal receptor cells that are concentrated near the center of the retina and that function in daylight or in well-lit conditions; detect fine detail and give rise to color sensations. (c) Optic nerve- the nerve that carries neural impulses from the eye to the brain. (d) Blind spot- the point at which the optic nerve leaves the eye, creating a “blind” spot because no receptor cells are located there. (e) Fovea- the central focal point in the retina, around which the eye’s cones cluster. iii) Visual Information Processing (1) Feature Detection
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(a) Feature detection- nerve cells in the brain that respond to specific features of the stimulus, such as shape, angle, or movement. (2) Parallel Processing (a) Parallel processing- the processing of many aspects of a problem simultaneously; the brain’s natural mode of information processing for many functions, including vision. iv) Color Vision (1) Young-Helmholtz trichromatic (three-color) theory- the theory that the retina contains three different color receptors- one most sensitive to red, one to green, and one to blue- which when stimulated in combination can produce the perception of any color. (2) Opponent-process theory- the theory that opposing retinal processes (red- green, yellow-blue, white-black) enable color vision.
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  • Fall '08
  • Unknown
  • Psychology, Depth perception, Cues- depth cues

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