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Number of discernible colors for color-deficient observers estimated from the MacAdam limits.
MedLine Citation:
PMID:  20922000     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
We estimated the number of colors perceived by color normal and color-deficient observers when looking at the theoretic limits of object-color stimuli. These limits, the optimal color stimuli, were computed for a color normal observer and CIE standard illuminant D65, and the resultant colors were expressed in the CIELAB and DIN99d color spaces. The corresponding color volumes for abnormal color vision were computed using models simulating for normal trichromatic observers the appearance for dichromats and anomalous trichomats. The number of colors perceived in each case was then computed from the color volumes enclosed by the optimal colors also known as MacAdam limits. It was estimated that dichromats perceive less than 1% of the colors perceived by normal trichromats and that anomalous trichromats perceive 50%-60% for anomalies in the medium-wavelength-sensitive and 60%-70% for anomalies in the long-wavelength-sensitive cones. Complementary estimates obtained similarly for the spectral locus of monochromatic stimuli suggest less impairment for color-deficient observers, a fact that is explained by the two-dimensional nature of the locus.
Authors:
Esther Perales; Francisco Miguel Martínez-Verdú; João Manuel Maciel Linhares; Sérgio Miguel Cardoso Nascimento
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of the Optical Society of America. A, Optics, image science, and vision     Volume:  27     ISSN:  1520-8532     ISO Abbreviation:  J Opt Soc Am A Opt Image Sci Vis     Publication Date:  2010 Oct 
Date Detail:
Created Date:  2010-10-05     Completed Date:  2011-01-28     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9800943     Medline TA:  J Opt Soc Am A Opt Image Sci Vis     Country:  United States    
Other Details:
Languages:  eng     Pagination:  2106-14     Citation Subset:  IM    
Affiliation:
Department of Optics, University of Alicante, Carretera de San Vicente del Raspeig s/n 03690, Alicante Spain. esther.perales@ua.es
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MeSH Terms
Descriptor/Qualifier:
Case-Control Studies
Color
Color Perception*
Color Vision Defects / physiopathology*
Humans
Models, Biological
Surface Properties

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


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