| What defines a view? | |
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MedLine Citation:
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PMID: 11412888 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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At a given instant we see only visible surfaces, not an object's complete 3D appearance. Thus, objects may be represented as discrete 'views' showing only those features visible from a limited range of viewpoints. We address how to define a view using Koenderink's (Koenderink & Van Doorn, Biol. Cybernet. 32 (1979) 211.) geometric method for enumerating complete sets of stable views as aspect graphs. Using objects with known aspect graphs, five experiments examined whether the perception of orientation is sensitive to the qualitative features that define aspect graphs. Highest sensitivity to viewpoint changes was observed at locations where the theory predicts qualitative transitions, although some transitions did not affect performance. Hypotheses about why humans ignore some transitions offer insights into mechanisms for object representation. |
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Authors:
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M J Tarr; D J Kriegman |
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Publication Detail:
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Type: Journal Article; Research Support, U.S. Gov't, Non-P.H.S. |
Journal Detail:
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Title: Vision research Volume: 41 ISSN: 0042-6989 ISO Abbreviation: Vision Res. Publication Date: 2001 Jul |
Date Detail:
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Created Date: 2001-06-19 Completed Date: 2001-07-26 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 0417402 Medline TA: Vision Res Country: England |
Other Details:
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Languages: eng Pagination: 1981-2004 Citation Subset: IM |
Affiliation:
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Department of Cognitive and Linguistic Sciences, Brown University, Box 1978, 02912, Providence, RI, USA. michael_tarr@brown.edu |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Discrimination (Psychology)
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physiology Form Perception / physiology* Humans Mathematics Orientation / physiology |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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