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The role of local grouping and global orientation contrast in perception of orientation-modulated textures

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journal contribution
posted on 2003-10-01, 00:00 authored by N Prins, N Nottingham, Alexander MussapAlexander Mussap
We explored the contribution to perception of orientation-modulated textures of visual processes selective either for orientation contrast or orientation grouping. To distinguish between these two processes we manipulated the axis of local grouping of texture elements independently of the direction of global orientation modulation. The general question posed was whether visibility of texture structure (measured as threshold for discriminating spatial-frequency of texture structure) is dependent on the magnitude of orientation contrast, strength and direction of local grouping, or some combination of the two. We demonstrated that the factor of primary importance is the amplitude of global orientation contrast rather than the presence of local grouping content. Using orientation-interleaved textures (containing two superimposed textures modulated around orthogonal orientations), we further showed that orientation single-opponent processes are a more likely candidate for detecting orientation contrast than double-opponent processes.

History

Journal

Vision research

Volume

43

Pagination

2315 - 2331

Location

Oxford, England

Open access

  • Yes

ISSN

0042-6989

eISSN

1878-5646

Language

eng

Publication classification

C1 Refereed article in a scholarly journal

Copyright notice

2003, Elsevier Ltd.