A basis for cones

Brian Funt; Weihua Xiong

doi:10.1117/12.643211

3 February 2006 A basis for cones

Brian Funt, Weihua Xiong

Proceedings Volume 6057, Human Vision and Electronic Imaging XI; 605706 (2006) https://doi.org/10.1117/12.643211
Event: Electronic Imaging 2006, 2006, San Jose, California, United States

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.

Citation Download Citation

Brian Funt and Weihua Xiong "A basis for cones", Proc. SPIE 6057, Human Vision and Electronic Imaging XI, 605706 (3 February 2006); https://doi.org/10.1117/12.643211

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