| Does the chromatic Mach bands effect exist? | |
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MedLine Citation:
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PMID: 19761311 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The achromatic Mach bands effect is a well-known visual illusion, discovered over a hundred years ago. This effect has been investigated thoroughly, mainly for its brightness aspect. The existence of Chromatic Mach bands, however, has been disputed. In recent years it has been reported that Chromatic Mach bands are not perceived under controlled iso-luminance conditions. However, here we show that a variety of Chromatic Mach bands, consisting of chromatic and achromatic regions, separated by a saturation ramp, can be clearly perceived under iso-luminance and iso-brightness conditions. In this study, observers' eye movements were recorded under iso-brightness conditions. Several observers were tested for their ability to perceive the Chromatic Mach bands effect and its magnitude, across different cardinal and non-cardinal Chromatic Mach bands stimuli. A computational model of color adaptation, which predicted color induction and color constancy, successfully predicts this variation of Chromatic Mach bands. This has been tested by measuring the distance of the data points from the "achromatic point" and by calculating the shift of the data points from predicted complementary lines. The results suggest that the Chromatic Mach bands effect is a specific chromatic induction effect. |
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Authors:
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Avital Tsofe; Hedva Spitzer; Shmuel Einav |
Publication Detail:
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Type: Comparative Study; Journal Article; Research Support, Non-U.S. Gov't Date: 2009-06-30 |
Journal Detail:
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Title: Journal of vision Volume: 9 ISSN: 1534-7362 ISO Abbreviation: J Vis Publication Date: 2009 |
Date Detail:
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Created Date: 2009-09-18 Completed Date: 2009-12-14 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101147197 Medline TA: J Vis Country: United States |
Other Details:
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Languages: eng Pagination: 20.1-29 Citation Subset: IM |
Affiliation:
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Department of Biomedical Engineering, Faculty of Engineering, Tel-Aviv University, Tel-Aviv, Israel. tsofim@gmail.com |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adaptation, Psychological Adult Color* Color Perception Eye Movements* Female Humans Light* Male Models, Psychological Optical Illusions* Photic Stimulation / methods* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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