Chapter

Types of binocular disparity

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/9780199764150.003.0322

Series: Oxford Psychology Series

Types of binocular disparity

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This chapter deals with the geometry of different types of binocular disparity. Binocular disparities can be considered on a point-for-point basis, and there is evidence that the visual system initially registers local point disparities. However, higher levels of the visual system process relative disparities produced by two or more stimuli, and disparities arising from differences in the orientation, size, and shear of the images in the two eyes. The visual system also registers spatial gradients of disparity, including linear gradients that specify flat surfaces inclined in depth, and higher-order spatial derivatives of disparity that specify curvature in depth. The chapter also describes how images produced by large stimuli contain gradients of vertical disparities that depend on the eccentricity and distance of the stimulus.

Keywords: point disparities; relative disparities; disparity gradients; vertical disparity

Chapter.  13836 words.  Illustrated.

Subjects: Neuroscience

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