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THE COLOR VISION OF DICHROMATS : II. SATURATION AS THE BASIS FOR WAVELENGTH DISCRIMINATION AND COLOR MIXTURE
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 mµ plus white; to the long-wave end by 650 plus white. The proportion of color to white, hence...
Autores principales: | , |
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Formato: | Texto |
Lenguaje: | English |
Publicado: |
The Rockefeller University Press
1936
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2141492/ https://www.ncbi.nlm.nih.gov/pubmed/19872985 |
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author | Hecht, Selig Shlaer, Simon |
author_facet | Hecht, Selig Shlaer, Simon |
author_sort | Hecht, Selig |
collection | PubMed |
description | 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 mµ 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 Δλ at the center, and slowly in regions of large Δλ 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. |
format | Text |
id | pubmed-2141492 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 1936 |
publisher | The Rockefeller University Press |
record_format | MEDLINE/PubMed |
spelling | pubmed-21414922008-04-23 THE COLOR VISION OF DICHROMATS : II. SATURATION AS THE BASIS FOR WAVELENGTH DISCRIMINATION AND COLOR MIXTURE Hecht, Selig Shlaer, Simon J Gen Physiol Article 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 mµ 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 Δλ at the center, and slowly in regions of large Δλ 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. The Rockefeller University Press 1936-09-20 /pmc/articles/PMC2141492/ /pubmed/19872985 Text en Copyright © Copyright, 1936, by The Rockefeller Institute for Medical Research This article is distributed under the terms of an Attribution–Noncommercial–Share Alike–No Mirror Sites license for the first six months after the publication date (see http://www.rupress.org/terms). After six months it is available under a Creative Commons License (Attribution–Noncommercial–Share Alike 4.0 Unported license, as described at http://creativecommons.org/licenses/by-nc-sa/4.0/). |
spellingShingle | Article Hecht, Selig Shlaer, Simon THE COLOR VISION OF DICHROMATS : II. SATURATION AS THE BASIS FOR WAVELENGTH DISCRIMINATION AND COLOR MIXTURE |
title | THE COLOR VISION OF DICHROMATS : II. SATURATION AS THE BASIS FOR WAVELENGTH DISCRIMINATION AND COLOR MIXTURE |
title_full | THE COLOR VISION OF DICHROMATS : II. SATURATION AS THE BASIS FOR WAVELENGTH DISCRIMINATION AND COLOR MIXTURE |
title_fullStr | THE COLOR VISION OF DICHROMATS : II. SATURATION AS THE BASIS FOR WAVELENGTH DISCRIMINATION AND COLOR MIXTURE |
title_full_unstemmed | THE COLOR VISION OF DICHROMATS : II. SATURATION AS THE BASIS FOR WAVELENGTH DISCRIMINATION AND COLOR MIXTURE |
title_short | THE COLOR VISION OF DICHROMATS : II. SATURATION AS THE BASIS FOR WAVELENGTH DISCRIMINATION AND COLOR MIXTURE |
title_sort | color vision of dichromats : ii. saturation as the basis for wavelength discrimination and color mixture |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2141492/ https://www.ncbi.nlm.nih.gov/pubmed/19872985 |
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