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Role of feedback in mammalian vision: a new hypothesis and a computational model

Sastry, PS and Shah, Shesha and Singh, S and Unnikrishnan, KP (1999) Role of feedback in mammalian vision: a new hypothesis and a computational model. In: Vision Research, 39 (1). pp. 131-148.

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Official URL: http://dx.doi.org/10.1016/S0042-6989(98)00085-6

Abstract

This paper presents a novel hypothesis on the function of massive feedback pathways in mammalian visual systems. We propose that the cortical feature detectors compete not for the right to represent the output at a point, but for exclusive rights to abstract and represent part of the underlying input. Feedback can do this very naturally. A computational model that implements the above idea for the problem of line detection is presented and based on that we suggest a functional role for the thalamo-cortical loop during perception of lines. We show that the model successfully tackles the so called Cross problem. Based on some recent experimental results, we discuss the biological plausibility of our model. We also comment on the relevance of our hypothesis (on the role of feedback) to general sensory information processing and recognition. (C) 1998 Published by Elsevier Science Ltd. All rights reserved.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Elsevier Science.
Keywords: Corticofugal;Recognition;Edge;Binding;Filtering
Department/Centre: Division of Electrical Sciences > Electrical Engineering
Date Deposited: 29 Jun 2011 06:09
Last Modified: 29 Jun 2011 06:09
URI: http://eprints.iisc.ernet.in/id/eprint/38755

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