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Science 29 September 1978:
Vol. 201. no. 4362, pp. 1221 - 1223
DOI: 10.1126/science.201.4362.1221
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Articles

Red - Green Opponent Spectral Sensitivity: Disparity Between Cancellation and Direct Matching Methods

CARL R. INGLING JR. 1, PHILLIP W. RUSSELL 1, MARK S. REA 1, and BRIAN H.-P. TSOU 1

1 Institute for Research in Vision and Division of Sensory Biophysics, Ohio State University, Columbus 43212

The spectral sensitivity at the opponent stage of the visual system is traditionally measured by a hue-cancellation procedure. Comparison with a direct hue-matching method shows that cancellation overestimates short-wavelength sensitivity by as much as a factor of 30. The observation implies that different mechanisms control the perception of short-wavelength and long-wavelength redness.

Submitted on March 1, 1978
Revised on June 14, 1978


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Chromatic valence curves: alternative interpretation derived by the direct matching method.
M Ayama and M Ikeda (1982)
Science 215, 1538-1539
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