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Titolo:
Characterizing the spatial-frequency sensitivity of perceptual templates
Autore:
Lu, ZL; Dosher, BA;
Indirizzi:
Univ So Calif, Dept Psychol, Los Angeles, CA 90089 USA Univ So Calif Los Angeles CA USA 90089 Psychol, Los Angeles, CA 90089 USA Univ Calif Irvine, Memory Attent & Percept Lab, Dept Cognit Sci, Irvine, CA 92697 USA Univ Calif Irvine Irvine CA USA 92697 pt Cognit Sci, Irvine, CA 92697 USA Univ Calif Irvine, Inst Math Behav Sci, Irvine, CA 92697 USA Univ Calif Irvine Irvine CA USA 92697 ath Behav Sci, Irvine, CA 92697 USA
Titolo Testata:
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION
fascicolo: 9, volume: 18, anno: 2001,
pagine: 2041 - 2053
SICI:
1084-7529(200109)18:9<2041:CTSSOP>2.0.ZU;2-#
Fonte:
ISI
Lingua:
ENG
Soggetto:
VISUAL SIGNAL-DETECTION; MONKEY STRIATE CORTEX; HUMAN-VISION; CONTRAST DETECTION; NOISE; DISCRIMINATION; MASKING; MECHANISMS; ATTENTION; THRESHOLD;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
89
Recensione:
Indirizzi per estratti:
Indirizzo: Lu, ZL Univ So Calif, Dept Psychol, SGM 501, Los Angeles, CA 90089 USA Univ So Calif SGM 501 Los Angeles CA USA 90089 ngeles, CA 90089 USA
Citazione:
Z.L. Lu e B.A. Dosher, "Characterizing the spatial-frequency sensitivity of perceptual templates", J OPT SOC A, 18(9), 2001, pp. 2041-2053

Abstract

Filtered external noise has been an important tool in characterizing the spatial-frequency sensitivity of perceptual templates. Typically, low-pass- and/or high-pass-filtered external noise is added to the signal stimulus. Thresholds, the signal energy necessary to maintain given criterion performance levels, are measured as functions of the spatial-frequency passband of the external noise. An observer model is postulated to segregate the impactof the external noise and the internal noise. The spatial-frequency sensitivity of the perceptual template is determined by the relative impact exerted by external noise in each frequency band. The perceptual template model (PTM) is a general observer model that provides an excellent account of human performance in white external noise [Vision Res. 38, 1183 (1998); J. Opt. Soc. Am. A 16, 764 (1999)]. We further develop the PTM for filtered external noise and apply it to derive the spatial-frequency sensitivity of perceptual templates. (C) 2001 Optical Society of America.

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Documento generato il 25/01/20 alle ore 16:21:05