Orientation processing mechanisms revealed by the plaid tilt illusion

Stuart T Smith; Peter Wenderoth; Rick van der Zwan

doi:10.1016/S0042-6989(00)00268-6

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Orientation processing mechanisms revealed by the plaid tilt illusion

Journal article

Peer reviewed

Orientation processing mechanisms revealed by the plaid tilt illusion

Stuart T Smith, Peter Wenderoth and Rick van der Zwan

Vision Research, Vol.41(4), pp.483-494

2001

DOI: https://doi.org/10.1016/S0042-6989(00)00268-6

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Abstract

Medical and Health Sciences

Psychology and Cognitive Sciences

plaid tilt illusion

orientation coding

first-order

second-order

The tilt after-effect (TAE) and tilt illusion (TI) have revealed a great deal about the nature of orientation coding of 1-dimensional (1D) lines and gratings. Comparatively little research however has addressed the mechanisms responsible for encoding the orientation of 2-dimensional (2D) plaid stimuli. A multi-stage model of edge detection has recently been proposed [Georgeson, M. A. (1998) Image & Vision Computing, 16(6-7), 389-405] to account for the perceived structure of a plaid stimulus that incorporates extraction of the zero-crossings (ZCs) of the plaid. Data is presented showing that the ZCs of a plaid inducing stimulus can interact with vertical grating test stimulus to induce a standard tilt illusion. However, by considering the second-order structure of a plaid rather than ZCs, it was shown that the perceived orientation of the vertical test grating results from the combination of orientation illusions due to the first- and second-order components of an inducing plaid. The data suggest that the mechanisms encoding the orientation of second-order contours are similar to, and interact directly with, those that encode first-order contours.

Details

Title: Orientation processing mechanisms revealed by the plaid tilt illusion
Authors: Stuart T Smith (Author) - NASA Ames Research Centre, United States
Peter Wenderoth (Author) - Macquarie University
Rick van der Zwan (Author) - Sydney University
Publication details: Vision Research, Vol.41(4), pp.483-494
Publisher: Pergamon
Date published: 2001
DOI: 10.1016/S0042-6989(00)00268-6
ISSN: 0042-6989
Organisation Unit: University of the Sunshine Coast, Queensland
Language: English
Record Identifier: 99449589602621
Output Type: Journal article

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Collaboration types: Domestic collaboration; International collaboration
Web Of Science research areas: Neurosciences; Ophthalmology; Psychology