Chapter

Depth Perception

Nigel Daw

in How Vision Works

Published in print January 2012 | ISBN: 9780199751617
Published online May 2012 | e-ISBN: 9780199932375 | DOI: http://dx.doi.org/10.1093/acprof:oso/9780199751617.003.0006
Depth Perception

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There are a number of cues to depth perception, the most important one being disparity, leading to stereopsis. Others are accommodation, convergence, motion parallax, interocular velocity differences, perspective, texture gradients, superposition, and shading. Depth perception is important for the control of vergence movements, to look at an object nearer or further away, to detect which objects are nearer, and to determine the shape of an object. Nearly all areas of the brain have responses to depth cues. Those on the dorsal pathway are concerned primarily with large disparities, for vergence control, and navigation through the environment. As with motion, there are separate areas for observing an object in relation to its background and observing oneself in relation to the world. Those on the ventral pathway are concerned primarily with fine disparities and the details of what an object looks like.

Keywords: stereopsis; disparity; convergence; perspective; motion parallax; vergence control; shape of objects; dorsal pathway; ventral pathway

Chapter.  12315 words.  Illustrated.

Subjects: Neuropsychology

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