| Lighting direction affects recognition of untextured faces in photographic positive and negative. | |
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MedLine Citation:
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PMID: 10748933 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Face recognition in photographic positive and negative was examined in a same/different matching task in five lighting direction conditions using untextured 3-D laser-scanned faces. The lighting directions were +60, +30, 0, -30 and -60 degrees, where negative values represent bottom lighting and positive values represent top lighting. Recognition performance was better for faces in positive than in negative when lighting directions were at +60 degrees. In one experiment, the same effect was also found at +30 degrees. However, faces in negative were recognized better than positive when the direction was -60 degrees. There was no difference in recognition performance when the lighting direction was 0 and -30 degrees. These results confirm that the effect of lighting direction can be a determinant of the photographic negative effect. Positive faces, which normally appear to be top-lit, may be difficult to recognize in negative partly because of the accompanying change in apparent lighting direction to bottom-lit. |
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Authors:
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C H Liu; C A Collin; A M Burton; A Chaudhuri |
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Publication Detail:
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Type: Clinical Trial; Journal Article; Randomized Controlled Trial; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Vision research Volume: 39 ISSN: 0042-6989 ISO Abbreviation: Vision Res. Publication Date: 1999 Dec |
Date Detail:
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Created Date: 2000-04-12 Completed Date: 2000-04-12 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: 4003-9 Citation Subset: IM |
Affiliation:
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Department of Psychology, McGill University, Montréal, Québec, Canada. chang@psych.mcgill.ca |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adult Face* Female Humans Lasers Lighting / methods* Male Middle Aged Pattern Recognition, Visual* Photography* Psychophysics Reaction Time |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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