Spatial frequency tuned channels: implications for structure and function from psychophysical and computational studies of stereopsis

Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
J P Frisby, J E Mayhew

Abstract

Various psychophysical experiments investigating the role of spatial frequency tuned channels in stereopsis are reviewed and a computational model of stereopsis deriving from these studies is described. The distinctive features of the model are: (1) it identifies edge locations in each monocular field by searching for zero crossings in non-orientated centre-surround convolution profiles; (2) it selects among all possible binocular point-for-point combinations of edge locations only those which satisfy a (quasi-) collinear figural grouping rule; (3) it presents a concept of the orientated and spatial frequency tuned channel as a nonlinear grouping operator. The success of the model is demonstrated both on a stereo pair of a natural scene and on a random-dot stereogram.

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Jan 1, 1984·Vision Research·D Sagi, S Hochstein
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