Tri and tetrachromatic metamerism

Alfredo Restrepo

doi:10.1117/12.2038206

25 February 2014 Tri and tetrachromatic metamerism

Alfredo Restrepo

Proceedings Volume 9019, Image Processing: Algorithms and Systems XII; 90190G (2014) https://doi.org/10.1117/12.2038206
Event: IS&T/SPIE Electronic Imaging, 2014, San Francisco, California, United States

Abstract

Two light beams that are seen of the same colour, but possibly having different spectra, are said to be metameric. The colour of a light beam is based on the outputs of a set of photodetectors with different spectral responses, and metamerism results when such a set of photodetectors is unable to resolve two spectra. Metamerism can be characterized in terms of the L, M and S responses of the receptoral layer in the retina, or in terms of the CIE X, Y and Z curves, etc. Working with linear spaces, metamerism is mathematized in terms of the kernel of a certain linear transformation; we derive a basis of localized support functions for such a kernel. We consider metamerism in general and we consider metamerism in the trichromatic and tetrachromatic cases, in particular. Applications are in computer vision, computational photography and satellite imaginery, for example. We make a case for hue metamerism, where the luminance and saturation of two colours of the same hue may be different.

Citation Download Citation

Alfredo Restrepo "Tri and tetrachromatic metamerism", Proc. SPIE 9019, Image Processing: Algorithms and Systems XII, 90190G (25 February 2014); https://doi.org/10.1117/12.2038206

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available