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Titolo:
Attention activates winner-take-all competition among visual filters
Autore:
Lee, DK; Itti, L; Koch, C; Braun, J;
Indirizzi:
CALTECH, Pasadena, CA 91125 USA CALTECH Pasadena CA USA 91125CALTECH, Pasadena, CA 91125 USA
Titolo Testata:
NATURE NEUROSCIENCE
fascicolo: 4, volume: 2, anno: 1999,
pagine: 375 - 381
SICI:
1097-6256(199904)2:4<375:AAWCAV>2.0.ZU;2-U
Fonte:
ISI
Lingua:
ENG
Soggetto:
CONTRAST DISCRIMINATION; SELECTIVE ATTENTION; HUMAN-VISION; SPATIAL-FREQUENCY; SIMPLE CELLS; AREAS V1; CORTEX; MECHANISMS; SEARCH; MODEL;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
50
Recensione:
Indirizzi per estratti:
Indirizzo: Braun, J CALTECH, Pasadena, CA 91125 USA CALTECH Pasadena CA USA 91125CALTECH, Pasadena, CA 91125 USA
Citazione:
D.K. Lee et al., "Attention activates winner-take-all competition among visual filters", NAT NEUROSC, 2(4), 1999, pp. 375-381

Abstract

Shifting attention away from a visual stimulus reduces, but does not abolish, visual discrimination performance. This residual vision with 'poor' attention can be compared to normal vision with 'full' attention to reveal howattention alters visual perception. We report large differences between residual and normal visual thresholds for discriminating the orientation or spatial frequency of simple patterns, and smaller differences for discriminating contrast. A computational model, in which attention activates a winner-take-all competition among overlapping visual filters, quantitatively accounts for all observations. Our model predicts that the effects of attentionon visual cortical neurons include increased contrast gain as well as sharper tuning to orientation and spatial frequency.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 12/08/20 alle ore 21:04:36