Chapter

Binocular disparity and depth perception

Ian P. Howard and Brian J. Rogers

in Perceiving in Depth

Published in print February 2012 | ISBN: 9780199764150
Published online May 2012 | e-ISBN: 9780199949366 | DOI: http://dx.doi.org/10.1093/acprof:oso/9780199764150.003.0350

Series: Oxford Psychology Series

Binocular disparity and depth perception

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The visual system uses disparities to detect depth steps, surface slant and curvature, and the shapes of three-dimensional objects. Since the relative disparity produced by a given depth between two objects varies with the distance of the objects, relative disparities must be scaled by viewing distance. The eyes are separated horizontally, which introduces horizontal disparities. Consequently, it had been generally assumed that only horizontal disparities are used to code depth. However, we now know that the visual system uses vertical disparities in a variety of ways, including the perception of absolute distance, depth scaling of horizontal disparities, and the perception of 3-D shape. All these issues are discussed in this chapter.

Keywords: perception of slant; 3-D shape; distance scaling; vertical disparity

Chapter.  32457 words.  Illustrated.

Subjects: Neuroscience

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