Perception & Psychophysics

, Volume 3, Issue 4, pp 265–274 | Cite as

Depth, size and distance in stereoscopic vision

  • J. M. Foley
Article
  • 580 Downloads

Abstract

Evidence is presented to show that in stereoscopic vision a constant ratio of perceived size to perceived distance corresponds to a constant visual angle (the size-distance invariance hypothesis). The functions relating the size/ distance ratio to visual angle and the depth/distance ratio to disparity are determined for three as using the methods of magnitude estimation and magnitude production. The results for each a may be represented by power functions, the depth/ distance function having the higher exponent. These scales are used to predict the outcome of an experiment in which depth is matched to size. The agreement of predictions with results is good for the combined data of the group, but significant deviations occur from curves predicted for individual as. An experiment in which an oblique line is matched to a frontal extent yields data consistent with Luneburg’s hypothesis that the intrinsic geometry of visual space is non-Euclidean. The indicated curvature is negative for two as and varying from positive to negative for the third.

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Copyright information

© Psychonomic Society, Inc. 1968

Authors and Affiliations

  • J. M. Foley
    • 1
  1. 1.University of CaliforniaSanta Barbara

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