Document Detail


Simulations of adaptation and color appearance in observers with varying spectral sensitivity.
MedLine Citation:
PMID:  20883345     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
A model of adaptation and visual coding was used to simulate how color appearance might vary among individuals that differ only in their sensitivity to wavelength. Color responses to images were calculated for cone receptors with spectral sensitivities specific to the individual, and in postreceptoral mechanisms tuned to different combinations of the cones. Adaptation was assumed to normalize sensitivity within each cone and postreceptoral channel so that the average response to an ensemble of scenes equaled the mean response in channels defined for the reference observer. Image colors were then rendered from the adapted channels' outputs. The transformed images provide an illustration of the variations in color appearance that could be attributed to differences in spectral sensitivity in otherwise identical observers adapted to identical worlds, and examples of these predictions are shown for both normal variation (e.g. in lens and macular pigment) and color deficiencies (anomalous trichromacy). The simulations highlight the role that known processes of adaptation may play in compensating color appearance for variations in sensitivity both within and across observers, and provide a novel tool for visualizing the perceptual consequences of any variation in visual sensitivity including changes associated with development or disease.
Authors:
Michael A Webster; Igor Juricevic; Kyle C McDermott
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Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural    
Journal Detail:
Title:  Ophthalmic & physiological optics : the journal of the British College of Ophthalmic Opticians (Optometrists)     Volume:  30     ISSN:  1475-1313     ISO Abbreviation:  Ophthalmic Physiol Opt     Publication Date:  2010 Sep 
Date Detail:
Created Date:  2010-10-04     Completed Date:  2011-02-25     Revised Date:  2014-09-15    
Medline Journal Info:
Nlm Unique ID:  8208839     Medline TA:  Ophthalmic Physiol Opt     Country:  England    
Other Details:
Languages:  eng     Pagination:  602-10     Citation Subset:  IM    
Copyright Information:
© 2010 The Authors, Ophthalmic and Physiological Optics © 2010 The College of Optometrists.
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MeSH Terms
Descriptor/Qualifier:
Adaptation, Physiological / physiology*
Aged
Aging / physiology
Child
Color Perception / physiology*
Color Perception Tests / methods
Color Vision / physiology
Color Vision Defects / physiopathology,  psychology
Humans
Lens, Crystalline / physiology
Macula Lutea / chemistry
Models, Biological
Models, Psychological*
Retinal Cone Photoreceptor Cells / physiology*
Retinal Pigments / analysis
Grant Support
ID/Acronym/Agency:
EY-10834/EY/NEI NIH HHS; R01 EY010834/EY/NEI NIH HHS; R01 EY010834-14/EY/NEI NIH HHS
Chemical
Reg. No./Substance:
0/Retinal Pigments
Comments/Corrections

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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