Lightness in a Flash: Effect of Exposure Time on Lightness Perception

A gray target can appear lighter or darker depending on its surrounding spatial context. We examined the effect of exposure time on three such examples (simultaneous lightness contrast, dungeon illusion, and the two-room arrangement), finding very different results with exposure time as brief as 15...

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Detalles Bibliográficos
Autores principales: Kaneko, Sae, Gilchrist, Alan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: SAGE Publications 2020
Materias:
Short and Sweet
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7768315/
https://www.ncbi.nlm.nih.gov/pubmed/33489078
http://dx.doi.org/10.1177/2041669520983830
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author Kaneko, Sae
Gilchrist, Alan
author_facet Kaneko, Sae
Gilchrist, Alan
author_sort Kaneko, Sae
collection PubMed
description A gray target can appear lighter or darker depending on its surrounding spatial context. We examined the effect of exposure time on three such examples (simultaneous lightness contrast, dungeon illusion, and the two-room arrangement), finding very different results with exposure time as brief as 15 ms: the simultaneous lightness contrast was much stronger, the effect of the dungeon illusion was reversed, and the lightness difference between the two isoluminant patches in the two-room arrangement disappeared. These suggest that local luminance ratios dominate lightness perception in a brief flash.
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spelling pubmed-77683152021-01-21 Lightness in a Flash: Effect of Exposure Time on Lightness Perception Kaneko, Sae Gilchrist, Alan Iperception Short and Sweet A gray target can appear lighter or darker depending on its surrounding spatial context. We examined the effect of exposure time on three such examples (simultaneous lightness contrast, dungeon illusion, and the two-room arrangement), finding very different results with exposure time as brief as 15 ms: the simultaneous lightness contrast was much stronger, the effect of the dungeon illusion was reversed, and the lightness difference between the two isoluminant patches in the two-room arrangement disappeared. These suggest that local luminance ratios dominate lightness perception in a brief flash. SAGE Publications 2020-12-25 /pmc/articles/PMC7768315/ /pubmed/33489078 http://dx.doi.org/10.1177/2041669520983830 Text en © The Author(s) 2020 https://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 (https://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 Short and Sweet
Kaneko, Sae
Gilchrist, Alan
Lightness in a Flash: Effect of Exposure Time on Lightness Perception
title Lightness in a Flash: Effect of Exposure Time on Lightness Perception
title_full Lightness in a Flash: Effect of Exposure Time on Lightness Perception
title_fullStr Lightness in a Flash: Effect of Exposure Time on Lightness Perception
title_full_unstemmed Lightness in a Flash: Effect of Exposure Time on Lightness Perception
title_short Lightness in a Flash: Effect of Exposure Time on Lightness Perception
title_sort lightness in a flash: effect of exposure time on lightness perception
topic Short and Sweet
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7768315/
https://www.ncbi.nlm.nih.gov/pubmed/33489078
http://dx.doi.org/10.1177/2041669520983830
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