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Theoretical understanding of the early visual processes by data compression and data selection

Zhaoping, L; (2006) Theoretical understanding of the early visual processes by data compression and data selection. NETWORK-COMP NEURAL , 17 (4) 301 - 334. 10.1080/09548980600931995. Green open access

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Abstract

Early vision is best understood in terms of two key information bottlenecks along the visual pathway - the optic nerve and, more severely, attention. Two effective strategies for sampling and representing visual inputs in the light of the bottlenecks are (1) data compression with minimum information loss and (2) data deletion. This paper reviews two lines of theoretical work which understand processes in retina and primary visual cortex (V I) in this framework. The first is an efficient coding principle which argues that early visual processes compress input into a more efficient form to transmit as much information as possible through channels of limited capacity. It can explain the properties of visual sampling and the nature of the receptive fields of retina and V1. It has also been argued to reveal the independent causes of the inputs. The second theoretical tack is the hypothesis that neural activities in VI represent the bottom up saliencies of visual inputs, such that information can be selected for, or discarded from, detailed or attentive processing. This theory links V1 physiology with pre-attentive visual selection behavior. By making experimentally testable predictions, the potentials and limitations of both sets of theories can be explored.

Type: Article
Title: Theoretical understanding of the early visual processes by data compression and data selection
Open access status: An open access version is available from UCL Discovery
DOI: 10.1080/09548980600931995
Keywords: early vision, efficient coding, bottom up attentional selection, V1, retina, saliency map, LATERAL GENICULATE-NUCLEUS, CLASSICAL RECEPTIVE-FIELD, RETINAL GANGLION-CELLS, CONTEXTUAL INFLUENCES, INFORMATION CAPACITY, STRIATE CORTEX, NATURAL SCENES, EYE-MOVEMENTS, SALIENCY MAP, V1
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
URI: https://discovery.ucl.ac.uk/id/eprint/5248
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