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

Prins, Nicolaas, Nottingham, Natasha K. and Mussap, Alexander 2003, The role of local grouping and global orientation contrast in perception of orientation-modulated textures, Vision research, vol. 43, no. 22, pp. 2315-2331, doi: 10.1016/S0042-6989(03)00407-3.

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Title The role of local grouping and global orientation contrast in perception of orientation-modulated textures
Author(s) Prins, Nicolaas
Nottingham, Natasha K.
Mussap, Alexander
Journal name Vision research
Volume number 43
Issue number 22
Start page 2315
End page 2331
Publisher Pergamon
Place of publication Oxford, England
Publication date 2003-10
ISSN 0042-6989
1878-5646
Keyword(s) texture perception
orientation contrast
perceptual grouping
gabors
spatial-frequency discrimination
Summary 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.
Language eng
DOI 10.1016/S0042-6989(03)00407-3
Field of Research 170112 Sensory Processes, Perception and Performance
Socio Economic Objective 970117 Expanding Knowledge in Psychology and Cognitive Sciences
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2003, Elsevier Ltd.
Persistent URL http://hdl.handle.net/10536/DRO/DU:30002023

Document type: Journal Article
Collection: School of Psychology
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