Photometric, geometric, and perceptual factors in illumination-independent lightness constancy

Hdl Handle:
http://hdl.handle.net/10149/97405
Title:
Photometric, geometric, and perceptual factors in illumination-independent lightness constancy
Authors:
Soranzo, A. (Alessandro); Agostini, T. (Tiziano)
Affiliation:
University of Teesside. School of Social Sciences and Law.
Citation:
Soranzo, A. and Agostini, T. (2006) 'Photometric, geometric, and perceptual factors in illumination-independent lightness constancy', Perception and Psychophysics, 68 (1), pp.102-113.
Publisher:
Psychonomic Society
Journal:
Perception and Psychophysics
Issue Date:
Jan-2006
URI:
http://hdl.handle.net/10149/97405
Additional Links:
http://app.psychonomic-journals.org/content/68/1/102.abstract
Abstract:
It has been shown that lightness constancy depends on the articulation of the visual field (Agostini & Galmonte, 1999). However, among researchers there is little agreement about the meaning of "articulation." Beyond the terminological heterogeneity, an important issue remains: What factors are relevant for the stability of surface color perception? Using stimuli with two fields of illumination, we explore this issue in three experiments. In Experiment 1, we manipulated the number of luminances, the number of reflectances, and the number of surfaces and their spatial relationships; in Experiment 2, we manipulated the luminance range; finally, in Experiment 3 we varied the number of surfaces crossed by the illumination edge. We found that there are two relevant factors in optimizing lightness constancy: (1) the lowest luminance in shadow and (2) the co-presence of patches of equal reflectance in both fields of illumination. The latter effect is larger if these patches strongly belong to each other. We interpret these findings within the albedo hypothesis.
Type:
Article
Language:
en
Keywords:
lightness constancy; photometric; geometric; perceptual; illumination
ISSN:
0031-5117
Rights:
Author can archive post-print (ie final draft post-refereeing). For full details see http://www.sherpa.ac.uk/romeo/ [Accessed 26/04/2010]
Citation Count:
1 [Scopus, 26/04/2010]

Full metadata record

DC FieldValue Language
dc.contributor.authorSoranzo, A. (Alessandro)en
dc.contributor.authorAgostini, T. (Tiziano)en
dc.date.accessioned2010-04-26T15:06:06Z-
dc.date.available2010-04-26T15:06:06Z-
dc.date.issued2006-01-
dc.identifier.citationPerception and Psychophysics; 68 (1): 102-113en
dc.identifier.issn0031-5117-
dc.identifier.urihttp://hdl.handle.net/10149/97405-
dc.description.abstractIt has been shown that lightness constancy depends on the articulation of the visual field (Agostini & Galmonte, 1999). However, among researchers there is little agreement about the meaning of "articulation." Beyond the terminological heterogeneity, an important issue remains: What factors are relevant for the stability of surface color perception? Using stimuli with two fields of illumination, we explore this issue in three experiments. In Experiment 1, we manipulated the number of luminances, the number of reflectances, and the number of surfaces and their spatial relationships; in Experiment 2, we manipulated the luminance range; finally, in Experiment 3 we varied the number of surfaces crossed by the illumination edge. We found that there are two relevant factors in optimizing lightness constancy: (1) the lowest luminance in shadow and (2) the co-presence of patches of equal reflectance in both fields of illumination. The latter effect is larger if these patches strongly belong to each other. We interpret these findings within the albedo hypothesis.en
dc.language.isoenen
dc.publisherPsychonomic Societyen
dc.relation.urlhttp://app.psychonomic-journals.org/content/68/1/102.abstracten
dc.rightsAuthor can archive post-print (ie final draft post-refereeing). For full details see http://www.sherpa.ac.uk/romeo/ [Accessed 26/04/2010]en
dc.subjectlightness constancyen
dc.subjectphotometricen
dc.subjectgeometricen
dc.subjectperceptualen
dc.subjectilluminationen
dc.titlePhotometric, geometric, and perceptual factors in illumination-independent lightness constancyen
dc.typeArticleen
dc.contributor.departmentUniversity of Teesside. School of Social Sciences and Law.en
dc.identifier.journalPerception and Psychophysicsen
ref.citationcount1 [Scopus, 26/04/2010]en
or.citation.harvardSoranzo, A. and Agostini, T. (2006) 'Photometric, geometric, and perceptual factors in illumination-independent lightness constancy', Perception and Psychophysics, 68 (1), pp.102-113.-
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