Document Detail


Positive colored afterimages from the figure-ground configurations of colored lights: effects of chromaticity, luminance and a spatial parameter of the adapting stimuli.
MedLine Citation:
PMID:  3195060     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Colored afterimages were obtained after the eye was exposed to the adapting field consisting of the figure-ground configuration of colored lights with the same hue and different saturation. When a colored patch was surrounded by a more saturated field, the color of the afterimage was similar to that of the previous patch (positive afterimage). By measuring the threshold chromaticity difference between the patch and the surround for the production of the positive afterimage, the effects of the chromaticity, luminance and a spatial parameter of the adapting field were determined. The obtained threshold chromaticity differences increased with an increase in the saturation of the adapting field, and with a decrease in the surround luminance. When the adapting field consisted of an equiluminous saturation-modulated rectangular grating, the threshold chromaticity difference curves showed similar properties as those of the contrast thresholds for equiluminous chromaticity-modulated gratings. The results suggest the existence of a set of mechanisms at higher-order level in the visual system, tuning the difference in hue and/or saturation across contours.
Authors:
S Takahashi; Y Ejima; M Akita
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Vision research     Volume:  28     ISSN:  0042-6989     ISO Abbreviation:  Vision Res.     Publication Date:  1988  
Date Detail:
Created Date:  1988-12-28     Completed Date:  1988-12-28     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0417402     Medline TA:  Vision Res     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  521-33     Citation Subset:  IM    
Affiliation:
Department of Psychology, Faculty of Letters, Kyoto University, Japan.
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MeSH Terms
Descriptor/Qualifier:
Adaptation, Ocular
Afterimage / physiology*
Color Perception / physiology*
Humans
Lighting
Sensory Thresholds / physiology

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