| Motion transparency in superimposed dense random-dot patterns: psychophysics and simulation. | |
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MedLine Citation:
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PMID: 9474339 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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To determine the mechanism underlying motion transparency, representative examples of motion transparency are listed and possible mechanisms are suggested. Those are feature tracking, multiple spatial-frequency channels, luminance-based transparency rules, and motion energy. Next, an interesting stimulus for motion transparency is introduced, namely superimposed dense random-dot patterns, which is not explained by feature tracking or multiple spatial-frequency channels. A psychophysical experiment reveals that the occurrence of motion transparency in this stimulus depends on three luminance levels assigned to three possible combinations of component dots: (1) white dots superimposed upon white dots, (2) white dots upon black dots, and (3) black dots upon black dots. However, physical rules of luminance-based transparency fail to explain the results. Finally, a computer simulation reveals that a computational model based on motion energy quantitatively predicts the human psychophysical performance. All the results support the idea that motion-energy detection followed by spatial integration is a likely candidate for the mechanism underlying motion transparency. |
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Authors:
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I Murakami |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Perception Volume: 26 ISSN: 0301-0066 ISO Abbreviation: Perception Publication Date: 1997 |
Date Detail:
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Created Date: 1998-03-04 Completed Date: 1998-03-04 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 0372307 Medline TA: Perception Country: ENGLAND |
Other Details:
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Languages: eng Pagination: 679-92 Citation Subset: IM |
Affiliation:
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Department of Psychology, University of Tokyo, Japan. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Computer Simulation* Humans Models, Biological Motion Perception* Pattern Recognition, Visual Psychophysics* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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