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Proceedings Paper

A basis for cones
Author(s): Brian Funt; Weihua Xiong
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Paper Abstract

Why do the human cones have the spectral sensitivities they do? We hypothesize that they may have evolved to their present form because their sensitivities are optimal in terms of their ability to recover the spectrum of incident light. As evidence in favor of this hypothesis, we compare the accuracy with which the incoming spectrum can be approximated by a three-dimensional linear model based on the cone responses and compare this to the optimal approximations defined by models based on principal components analysis, independent component analysis, non-negative matrix factorization and non-negative independent component analysis. We introduce a new method of reconstructing spectra from the cone responses and show that the cones are almost as good as these optimal methods in estimating the spectrum.

Paper Details

Date Published: 3 February 2006
PDF: 10 pages
Proc. SPIE 6057, Human Vision and Electronic Imaging XI, 605706 (3 February 2006); doi: 10.1117/12.643211
Show Author Affiliations
Brian Funt, Simon Fraser Univ. (Canada)
Weihua Xiong, Simon Fraser Univ. (Canada)

Published in SPIE Proceedings Vol. 6057:
Human Vision and Electronic Imaging XI
Bernice E. Rogowitz; Thrasyvoulos N. Pappas; Scott J. Daly, Editor(s)

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