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THE COLOR VISION OF DICHROMATS : II. SATURATION AS THE BASIS FOR WAVELENGTH DISCRIMINATION AND COLOR MIXTURE.
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MedLine Citation:
PMID:  19872985     Owner:  NLM     Status:  PubMed-not-MEDLINE    
Abstract/OtherAbstract:
1. Wavelength discrimination for the colorblind is entirely determined by saturation differences in the spectrum. From the neutral point to the short-wave end, his spectrum may be completely matched by 440 mmicro plus white; to the long-wave end by 650 plus white. The proportion of color to white, hence the relative saturation, changes rapidly in the region of small Deltalambda at the center, and slowly in regions of large Deltalambda at the ends. 2. The data of spectrum gauging with two primaries (color mixture) by the dichromat are shown to contain the saturation distribution in the spectrum for the dichromat. This is because each mixture of primaries may be considered as composed of a mixture which matches white and of an excess of one primary. The data when so computed yield saturation distributions almost identical with those found by direct measurement, and show that on each side of the neutral point the basis of color mixture for the colorblind lies in saturation and not in hue differences. 3. To judge by these measurements, the spectrum for the protanope and deuteranope is composed of only two hues, themselves probably of low saturation, situated one at each end. Toward the center these hues decrease still more in saturation until they completely disappear in the white of the neutral point.
Authors:
S Hecht; S Shlaer
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The Journal of general physiology     Volume:  20     ISSN:  0022-1295     ISO Abbreviation:  J. Gen. Physiol.     Publication Date:  1936 Sep 
Date Detail:
Created Date:  2010-06-22     Completed Date:  2010-06-22     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  2985110R     Medline TA:  J Gen Physiol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  83-93     Citation Subset:  -    
Affiliation:
Laboratory of Biophysics, Columbia University, New York.
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Full Text
Journal Information
Journal ID (nlm-ta): J Gen Physiol
ISSN: 0022-1295
ISSN: 1540-7748
Publisher: The Rockefeller University Press
Article Information
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Copyright © Copyright, 1936, by The Rockefeller Institute for Medical Research
Accepted Day: 27 Month: 11 Year: 1935
Print publication date: Day: 20 Month: 9 Year: 1936
Volume: 20 Issue: 1
First Page: 83 Last Page: 93
ID: 2141492
PubMed Id: 19872985

THE COLOR VISION OF DICHROMATS : II. SATURATION AS THE BASIS FOR WAVELENGTH DISCRIMINATION AND COLOR MIXTURE
Selig Hecht
Simon Shlaer
From the Laboratory of Biophysics, Columbia University, New York


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