Sensitivity to three-dimensional orientation in visual search

Psychological Science 1 (5):323-326 (1990)
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Abstract

Previous theories of early vision have assumed that visual search is based on simple two-dimensional aspects of an image, such as the orientation of edges and lines. It is shown here that search can also be based on three-dimensional orientation of objects in the corresponding scene, provided that these objects are simple convex blocks. Direct comparison shows that image-based and scene-based orientation are similar in their ability to facilitate search. These findings support the hypothesis that scene-based properties are represented at preattentive levels in early vision.

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Ronald A. Rensink
University of British Columbia

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