Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Detection of chromoluminance patterns on chromoluminance pedestals I: threshold measurements
Autore:
Chen, CC; Foley, JM; Brainard, DH;
Indirizzi:
Univ Calif Santa Barbara, Dept Psychol, Santa Barbara, CA 93106 USA Univ Calif Santa Barbara Santa Barbara CA USA 93106 Barbara, CA 93106 USA
Titolo Testata:
VISION RESEARCH
fascicolo: 7, volume: 40, anno: 2000,
pagine: 773 - 788
SICI:
0042-6989(2000)40:7<773:DOCPOC>2.0.ZU;2-7
Fonte:
ISI
Lingua:
ENG
Soggetto:
CONE-CONTRAST SPACE; CHROMATIC MECHANISMS; SIMULTANEOUS MASKING; HUMAN-VISION; LUMINANCE; COLOR; DISCRIMINATION; ADAPTATION; PSYCHOPHYSICS; SENSITIVITY;
Keywords:
chromoluminance pattern; masking; facilitation; chromatic mechanisms; isoluminance;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
55
Recensione:
Indirizzi per estratti:
Indirizzo: Chen, CC Univ British Columbia, Dept Ophthalmol, Room A146,4480 Oak St, Vancouver, BC V6H 3V4, Canada Univ British Columbia Room A146,4480 Oak St Vancouver BC Canada V6H 3V4
Citazione:
C.C. Chen et al., "Detection of chromoluminance patterns on chromoluminance pedestals I: threshold measurements", VISION RES, 40(7), 2000, pp. 773-788

Abstract

Measurement of the detection thresholds of patterns on pedestals: of various kinds has the potential of providing insight into the mechanisms that mediate pattern vision. This study is concerned with chromoluminance patterns, that is, patterns that vary over space in luminance, chromaticity, or both. Contrast thresholds for 1 c/deg Gabor patterns (targets) were measured as a function of the contrast of Gabor pedestal patterns (TvC functions),: where the pedestals paired with each target were modulated in a wide range of directions in color space. For most target-pedestal pairs, the TvC function decreased (facilitation) and then increased as pedestal contrast increased. The increase went above the absolute contrast threshold (masking) for all target-pedestal pairs except in cases where facilitation occurred at theupper end of the pedestal contrast range. The specific form of the TvC function varied greatly with the target and pedestal, consistent with a general, model of pedestal effects proposed by Foley [Journal of the Optical Society of America A, 1994, 11(6)]. There were two sets of target-pedestal pairs for which facilitation did not occur, but masking did occur: pairs in which the target was a luminance modulation:and the pedestals were individually isoluminant and pairs in which the pedestal was blue/yellow and the target was in any-of our directions except blue/yellow. (C) 2000 Elsevier Science Ltd. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 27/11/20 alle ore 02:10:42