Cargando…

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...

Descripción completa

Detalles Bibliográficos
Autores principales: Hecht, Selig, Shlaer, Simon
Formato: Texto
Lenguaje:English
Publicado: The Rockefeller University Press 1936
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2141492/
https://www.ncbi.nlm.nih.gov/pubmed/19872985
_version_ 1782144226806464512
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
work_keys_str_mv AT hechtselig thecolorvisionofdichromatsiisaturationasthebasisforwavelengthdiscriminationandcolormixture
AT shlaersimon thecolorvisionofdichromatsiisaturationasthebasisforwavelengthdiscriminationandcolormixture
AT hechtselig colorvisionofdichromatsiisaturationasthebasisforwavelengthdiscriminationandcolormixture
AT shlaersimon colorvisionofdichromatsiisaturationasthebasisforwavelengthdiscriminationandcolormixture