Cargando…

Can Color and Motion Information Be Used to Disentangle the Influence of Multiple Light Sources on Gloss Perception?

Previous results suggest that the glossiness of a surface is systematically underestimated when adjacent highlights from different light sources overlap to such an extent that they appear as a single, expanded highlight. Here we investigated how the availability of color- and motion-induced informat...

Descripción completa

Detalles Bibliográficos
Autores principales: Wendt, Gunnar, Faul, Franz
Formato: Online Artículo Texto
Lenguaje:English
Publicado: SAGE Publications 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6187428/
https://www.ncbi.nlm.nih.gov/pubmed/30344995
http://dx.doi.org/10.1177/2041669518803964
_version_ 1783363019370135552
author Wendt, Gunnar
Faul, Franz
author_facet Wendt, Gunnar
Faul, Franz
author_sort Wendt, Gunnar
collection PubMed
description Previous results suggest that the glossiness of a surface is systematically underestimated when adjacent highlights from different light sources overlap to such an extent that they appear as a single, expanded highlight. Here we investigated how the availability of color- and motion-induced information, which may help to unravel such merged highlights, affects gloss constancy. We used images of computer-generated scenes where a complex 3D object made of glossy material was illuminated by three point light sources, which had varying distances to each other. The point lights were either all achromatic or they differed clearly in their color and the test object was either presented statically or rotating. The subjects had to adjust the smoothness of a match object illuminated by a single achromatic point light so that it appeared to have the same glossiness as the test object. The results show that color information contributes to gloss constancy in this situation: If it was available, the perceived glossiness remained almost invariant with changes in the degree of overlap between the highlights. This suggests that highlights of different color are processed separately. Motion information had no such effect but only led to a general increase in perceived glossiness.
format Online
Article
Text
id pubmed-6187428
institution National Center for Biotechnology Information
language English
publishDate 2018
publisher SAGE Publications
record_format MEDLINE/PubMed
spelling pubmed-61874282018-10-19 Can Color and Motion Information Be Used to Disentangle the Influence of Multiple Light Sources on Gloss Perception? Wendt, Gunnar Faul, Franz Iperception Article Previous results suggest that the glossiness of a surface is systematically underestimated when adjacent highlights from different light sources overlap to such an extent that they appear as a single, expanded highlight. Here we investigated how the availability of color- and motion-induced information, which may help to unravel such merged highlights, affects gloss constancy. We used images of computer-generated scenes where a complex 3D object made of glossy material was illuminated by three point light sources, which had varying distances to each other. The point lights were either all achromatic or they differed clearly in their color and the test object was either presented statically or rotating. The subjects had to adjust the smoothness of a match object illuminated by a single achromatic point light so that it appeared to have the same glossiness as the test object. The results show that color information contributes to gloss constancy in this situation: If it was available, the perceived glossiness remained almost invariant with changes in the degree of overlap between the highlights. This suggests that highlights of different color are processed separately. Motion information had no such effect but only led to a general increase in perceived glossiness. SAGE Publications 2018-10-10 /pmc/articles/PMC6187428/ /pubmed/30344995 http://dx.doi.org/10.1177/2041669518803964 Text en © The Author(s) 2018 http://creativecommons.org/licenses/by/4.0/ Creative Commons CC-BY: This article is distributed under the terms of the Creative Commons Attribution 4.0 License (http://www.creativecommons.org/licenses/by/4.0/) which permits any use, reproduction and distribution of the work without further permission provided the original work is attributed as specified on the SAGE and Open Access pages (https://us.sagepub.com/en-us/nam/open-access-at-sage).
spellingShingle Article
Wendt, Gunnar
Faul, Franz
Can Color and Motion Information Be Used to Disentangle the Influence of Multiple Light Sources on Gloss Perception?
title Can Color and Motion Information Be Used to Disentangle the Influence of Multiple Light Sources on Gloss Perception?
title_full Can Color and Motion Information Be Used to Disentangle the Influence of Multiple Light Sources on Gloss Perception?
title_fullStr Can Color and Motion Information Be Used to Disentangle the Influence of Multiple Light Sources on Gloss Perception?
title_full_unstemmed Can Color and Motion Information Be Used to Disentangle the Influence of Multiple Light Sources on Gloss Perception?
title_short Can Color and Motion Information Be Used to Disentangle the Influence of Multiple Light Sources on Gloss Perception?
title_sort can color and motion information be used to disentangle the influence of multiple light sources on gloss perception?
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6187428/
https://www.ncbi.nlm.nih.gov/pubmed/30344995
http://dx.doi.org/10.1177/2041669518803964
work_keys_str_mv AT wendtgunnar cancolorandmotioninformationbeusedtodisentangletheinfluenceofmultiplelightsourcesonglossperception
AT faulfranz cancolorandmotioninformationbeusedtodisentangletheinfluenceofmultiplelightsourcesonglossperception