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Perception of Perspective Angles
We perceive perspective angles, that is, angles that have an orientation in depth, differently from what they are in physical space. Extreme examples are angles between rails of a railway line or between lane dividers of a long and straight road. In this study, subjects judged perspective angles bet...
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Formato: | Online Artículo Texto |
Lenguaje: | English |
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SAGE Publications
2015
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4934606/ https://www.ncbi.nlm.nih.gov/pubmed/27433312 http://dx.doi.org/10.1177/2041669515593022 |
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author | Erkelens, Casper J. |
author_facet | Erkelens, Casper J. |
author_sort | Erkelens, Casper J. |
collection | PubMed |
description | We perceive perspective angles, that is, angles that have an orientation in depth, differently from what they are in physical space. Extreme examples are angles between rails of a railway line or between lane dividers of a long and straight road. In this study, subjects judged perspective angles between bars lying on the floor of the laboratory. Perspective angles were also estimated from pictures taken from the same point of view. Converging and diverging angles were judged to test three models of visual space. Four subjects evaluated the perspective angles by matching them to nonperspective angles, that is, angles between the legs of a compass oriented in the frontal plane. All subjects judged both converging and diverging angles larger than the physical angle and smaller than the angles in the proximal stimuli. A model of shallow visual space describes the results. According to the model, lines parallel to visual lines, vanishing at infinity in physical space, converge to visual lines in visual space. The perceived shape of perspective angles is incompatible with the perceived length and width of the bars. The results have significance for models of visual perception and practical implications for driving and flying in poor visibility conditions. |
format | Online Article Text |
id | pubmed-4934606 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2015 |
publisher | SAGE Publications |
record_format | MEDLINE/PubMed |
spelling | pubmed-49346062016-07-18 Perception of Perspective Angles Erkelens, Casper J. Iperception Article We perceive perspective angles, that is, angles that have an orientation in depth, differently from what they are in physical space. Extreme examples are angles between rails of a railway line or between lane dividers of a long and straight road. In this study, subjects judged perspective angles between bars lying on the floor of the laboratory. Perspective angles were also estimated from pictures taken from the same point of view. Converging and diverging angles were judged to test three models of visual space. Four subjects evaluated the perspective angles by matching them to nonperspective angles, that is, angles between the legs of a compass oriented in the frontal plane. All subjects judged both converging and diverging angles larger than the physical angle and smaller than the angles in the proximal stimuli. A model of shallow visual space describes the results. According to the model, lines parallel to visual lines, vanishing at infinity in physical space, converge to visual lines in visual space. The perceived shape of perspective angles is incompatible with the perceived length and width of the bars. The results have significance for models of visual perception and practical implications for driving and flying in poor visibility conditions. SAGE Publications 2015-07-30 /pmc/articles/PMC4934606/ /pubmed/27433312 http://dx.doi.org/10.1177/2041669515593022 Text en © The Author(s) 2015 http://creativecommons.org/licenses/by/3.0/ This article is distributed under the terms of the Creative Commons Attribution 3.0 License (http://www.creativecommons.org/licenses/by/3.0/) 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 page (https://us.sagepub.com/en-us/nam/open-access-at-sage). |
spellingShingle | Article Erkelens, Casper J. Perception of Perspective Angles |
title | Perception of Perspective Angles |
title_full | Perception of Perspective Angles |
title_fullStr | Perception of Perspective Angles |
title_full_unstemmed | Perception of Perspective Angles |
title_short | Perception of Perspective Angles |
title_sort | perception of perspective angles |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4934606/ https://www.ncbi.nlm.nih.gov/pubmed/27433312 http://dx.doi.org/10.1177/2041669515593022 |
work_keys_str_mv | AT erkelenscasperj perceptionofperspectiveangles |