Visual illusions via neural dynamics: Wilson-Cowan-type models and the efficient representation principle.

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State: Public
Version: Final published version
License: All rights reserved
Serval ID
serval:BIB_489E7A50A3E5
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Visual illusions via neural dynamics: Wilson-Cowan-type models and the efficient representation principle.
Journal
Journal of neurophysiology
Author(s)
Bertalmío M., Calatroni L., Franceschi V., Franceschiello B., Gomez Villa A., Prandi D.
ISSN
1522-1598 (Electronic)
ISSN-L
0022-3077
Publication state
Published
Issued date
01/05/2020
Peer-reviewed
Oui
Volume
123
Number
5
Pages
1606-1618
Language
english
Notes
Publication types: Journal Article
Publication Status: ppublish
Abstract
We reproduce suprathreshold perception phenomena, specifically visual illusions, by Wilson-Cowan (WC)-type models of neuronal dynamics. Our findings show that the ability to replicate the illusions considered is related to how well the neural activity equations comply with the efficient representation principle. Our first contribution consists in showing that the WC equations can reproduce a number of brightness and orientation-dependent illusions. Then we formally prove that there cannot be an energy functional that the WC dynamics are minimizing. This leads us to consider an alternative, variational modeling, which has been previously employed for local histogram equalization (LHE) tasks. To adapt our model to the architecture of V1, we perform an extension that has an explicit dependence on local image orientation. Finally, we report several numerical experiments showing that LHE provides a better reproduction of visual illusions than the original WC formulation, and that its cortical extension is capable also to reproduce complex orientation-dependent illusions.NEW & NOTEWORTHY We show that the Wilson-Cowan equations can reproduce a number of brightness and orientation-dependent illusions. Then we formally prove that there cannot be an energy functional that the Wilson-Cowan equations are minimizing, making them suboptimal with respect to the efficient representation principle. We thus propose a slight modification that is consistent with such principle and show that this provides a better reproduction of visual illusions than the original Wilson-Cowan formulation. We also consider the cortical extension of both models to deal with more complex orientation-dependent illusions.
Keywords
Brightness perception, Efficient representation principle, Variational modelling, Wilson-Cowan equations, Wilson–Cowan equations, brightness perception, efficient representation principle, variational modeling
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Create date
14/03/2020 14:28
Last modification date
03/05/2020 6:02
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