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Titolo:
Color and luminance in the perception of 1-and 2-dimensional motion
Autore:
Farell, B;
Indirizzi:
Syracuse Univ, Inst Sensory Res, Syracuse, NY 13244 USA Syracuse Univ Syracuse NY USA 13244 t Sensory Res, Syracuse, NY 13244 USA
Titolo Testata:
VISION RESEARCH
fascicolo: 16, volume: 39, anno: 1999,
pagine: 2633 - 2647
SICI:
0042-6989(199908)39:16<2633:CALITP>2.0.ZU;2-U
Fonte:
ISI
Lingua:
ENG
Soggetto:
DISCRIMINATION DETECTION RATIOS; VISUAL AREA MT; SPATIAL-FREQUENCY; CHROMATIC PROPERTIES; CARDINAL DIRECTIONS; PERCEIVED DIRECTION; SPEED PERCEPTION; HUMAN VISION; HAPPENS IF; RED-GREEN;
Keywords:
color; luminance; perceived speed; motion signals;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
76
Recensione:
Indirizzi per estratti:
Indirizzo: Farell, B Syracuse Univ, Inst Sensory Res, Syracuse, NY 13244 USA SyracuseUniv Syracuse NY USA 13244 Res, Syracuse, NY 13244 USA
Citazione:
B. Farell, "Color and luminance in the perception of 1-and 2-dimensional motion", VISION RES, 39(16), 1999, pp. 2633-2647

Abstract

An isoluminant color grating usually appears to move more slowly than a luminance grating that has the same physical speed. Yet a grating defined by both color and luminance is seen as perceptually unified and moving at a single intermediate speed. In experiments measuring perceived speed and direction, it was found that color- and luminance-based motion signals are combined differently in the perception of 1-D motion than they are in the perception of 2-D motion. Adding color to a moving 1-D luminance pattern, a grating, slows its perceived speed. Adding color to a moving 2-D luminance pattern, a plaid made of orthogonal gratings, leaves its perceived speed unchanged. Analogous results occur for the perception of the direction of 2-D motion. The visual system appears to discount color when analyzing the motion of luminance-bearing 2-D patterns. This strategy has adaptive advantages, making the sensing of object motion more veridical without sacrificing the ability to see motion at isoluminance. (C) 1999 Elsevier Science Ltd. All rights reserved.

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Documento generato il 16/07/20 alle ore 05:54:04