Brightness and darkness as perceptual dimensions.

A common-sense assumption concerning visual perception states that brightness and darkness cannot coexist at a given spatial location. One corollary of this assumption is that achromatic colors, or perceived grey shades, are contained in a one-dimensional (1-D) space varying from bright to dark. The...

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Autores principales:	Tony Vladusich, Marcel P Lucassen, Frans W Cornelissen
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2007
Materias:	Biology (General) QH301-705.5
Acceso en línea:	https://doaj.org/article/8062fc98b5eb463cb942872908c01d39
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id	oai:doaj.org-article:8062fc98b5eb463cb942872908c01d39
record_format	dspace
spelling	oai:doaj.org-article:8062fc98b5eb463cb942872908c01d392021-11-25T05:41:31ZBrightness and darkness as perceptual dimensions.1553-734X1553-735810.1371/journal.pcbi.0030179https://doaj.org/article/8062fc98b5eb463cb942872908c01d392007-10-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/18237226/?tool=EBIhttps://doaj.org/toc/1553-734Xhttps://doaj.org/toc/1553-7358A common-sense assumption concerning visual perception states that brightness and darkness cannot coexist at a given spatial location. One corollary of this assumption is that achromatic colors, or perceived grey shades, are contained in a one-dimensional (1-D) space varying from bright to dark. The results of many previous psychophysical studies suggest, by contrast, that achromatic colors are represented as points in a color space composed of two or more perceptual dimensions. The nature of these perceptual dimensions, however, presently remains unclear. Here we provide direct evidence that brightness and darkness form the dimensions of a two-dimensional (2-D) achromatic color space. This color space may play a role in the representation of object surfaces viewed against natural backgrounds, which simultaneously induce both brightness and darkness signals. Our 2-D model generalizes to the chromatic dimensions of color perception, indicating that redness and greenness (blueness and yellowness) also form perceptual dimensions. Collectively, these findings suggest that human color space is composed of six dimensions, rather than the conventional three.Tony VladusichMarcel P LucassenFrans W CornelissenPublic Library of Science (PLoS)articleBiology (General)QH301-705.5ENPLoS Computational Biology, Vol 3, Iss 10, p e179 (2007)
institution	DOAJ
collection	DOAJ
language	EN
topic	Biology (General) QH301-705.5
spellingShingle	Biology (General) QH301-705.5 Tony Vladusich Marcel P Lucassen Frans W Cornelissen Brightness and darkness as perceptual dimensions.
description	A common-sense assumption concerning visual perception states that brightness and darkness cannot coexist at a given spatial location. One corollary of this assumption is that achromatic colors, or perceived grey shades, are contained in a one-dimensional (1-D) space varying from bright to dark. The results of many previous psychophysical studies suggest, by contrast, that achromatic colors are represented as points in a color space composed of two or more perceptual dimensions. The nature of these perceptual dimensions, however, presently remains unclear. Here we provide direct evidence that brightness and darkness form the dimensions of a two-dimensional (2-D) achromatic color space. This color space may play a role in the representation of object surfaces viewed against natural backgrounds, which simultaneously induce both brightness and darkness signals. Our 2-D model generalizes to the chromatic dimensions of color perception, indicating that redness and greenness (blueness and yellowness) also form perceptual dimensions. Collectively, these findings suggest that human color space is composed of six dimensions, rather than the conventional three.
format	article
author	Tony Vladusich Marcel P Lucassen Frans W Cornelissen
author_facet	Tony Vladusich Marcel P Lucassen Frans W Cornelissen
author_sort	Tony Vladusich
title	Brightness and darkness as perceptual dimensions.
title_short	Brightness and darkness as perceptual dimensions.
title_full	Brightness and darkness as perceptual dimensions.
title_fullStr	Brightness and darkness as perceptual dimensions.
title_full_unstemmed	Brightness and darkness as perceptual dimensions.
title_sort	brightness and darkness as perceptual dimensions.
publisher	Public Library of Science (PLoS)
publishDate	2007
url	https://doaj.org/article/8062fc98b5eb463cb942872908c01d39
work_keys_str_mv	AT tonyvladusich brightnessanddarknessasperceptualdimensions AT marcelplucassen brightnessanddarknessasperceptualdimensions AT franswcornelissen brightnessanddarknessasperceptualdimensions
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Brightness and darkness as perceptual dimensions.

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