Chapter

Depth from interposition and shading

Ian P. Howard

in Perceiving in Depth

Published in print February 2012 | ISBN: 9780199764167
Published online May 2012 | e-ISBN: 9780199949373 | DOI: http://dx.doi.org/10.1093/acprof:oso/9780199764167.003.0086

Series: Oxford Psychology Series

Depth from interposition and shading

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Occlusion of a far object by a near object (interposition) indicates relative depth. Subjective contours occur when several objects are partially occluded by an object with the same luminance as the background. Also, texture elements of a surface show deletion and accretion as a nearer surface moves across it. The chapter deals with the role of all these stimulus features in the perception of relative depth. It ends with an account of how shading and shadows provide information about the three-dimensional shapes of objects.

Keywords: interposition; subjective contours; accretion-deletion; shape from shading; shadows

Chapter.  12497 words.  Illustrated.

Subjects: Neuroscience

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