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Titolo:
Visual response saturation to orientation contrast in the perception of texture boundary
Autore:
Motoyoshi, I; Nishida, S;
Indirizzi:
NTT, Commun Sci Labs, Human & Informat Sci Lab, Atsugi, Kanagawa 2430198, Japan NTT Atsugi Kanagawa Japan 2430198 ci Lab, Atsugi, Kanagawa 2430198, Japan
Titolo Testata:
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION
fascicolo: 9, volume: 18, anno: 2001,
pagine: 2209 - 2219
SICI:
1084-7529(200109)18:9<2209:VRSTOC>2.0.ZU;2-O
Fonte:
ISI
Lingua:
ENG
Soggetto:
SPATIAL-FREQUENCY; HUMAN-VISION; DISCRIMINATION TASKS; CONTOUR CURVATURE; GAIN-CONTROL; MECHANISMS; SEGMENTATION; SEGREGATION; MASKING; ASYMMETRIES;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
59
Recensione:
Indirizzi per estratti:
Indirizzo: Nishida, S NTT, Commun Sci Labs, Human & Informat Sci Lab, 3-1 Morinosato Wakamiya, Atsugi, Kanagawa 2430198, Japan NTT 3-1 Morinosato Wakamiya Atsugi Kanagawa Japan 2430198 Japan
Citazione:
I. Motoyoshi e S. Nishida, "Visual response saturation to orientation contrast in the perception of texture boundary", J OPT SOC A, 18(9), 2001, pp. 2209-2219

Abstract

We analyzed how the visual response to orientation modulation in texture patterns varied as a function of the magnitude of orientation contrast. Using a contrast-discrimination technique, we measured threshold increments of orientation contrast (the orientation contrast required for discriminating between two textures) at various pedestal-orientation contrasts. The orientation-contrast-response function estimated for a step-orientation contrast,which produces a vivid percept of surface boundaries, saturated at approximately 30 degrees (experiment 1). The saturation was still evident even when the strength of the step-orientation contrast was reduced by orientation noise (experiment 2), but no strong saturation was found for textures that did not produce a vivid percept of surface boundaries (experiment 3). Theseresults are consistent with the notion that orientation-based texture segregation involves the generation of a neural representation of the surface boundary whose strength is nearly independent of the magnitude of orientation contrast. (C) 2001 Optical Society of America.

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Documento generato il 26/01/20 alle ore 09:53:32