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The three dimensions of human visual sensitivity to first-order contrast statistics.

Authors
Type
Published Article
Journal
Vision Research
0042-6989
Publisher
Elsevier
Publication Date
Volume
47
Issue
17
Pages
2237–2248
Identifiers
PMID: 17619044
Source
Medline

Abstract

This work studies the preattentive discrimination of achromatic textures composed of mixtures of different (Weber) contrasts. These textures differ not at all in local spatial structure, but only in the relative proportions of different contrasts they comprise. It is shown that, like chromatic discrimination, preattentive discrimination of such textures is three-dimensional. The current results do not uniquely determine the characteristics of the three texture filters mediating human discrimination of these textures; they do, however, define the space of textures with 4th-order polynomial histograms to which human vision is sensitive. Three real-valued functions of contrast that collectively capture human sensitivity to the textures in this space are presented.

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