Color Constancy and a Changing Illumination

Finlayson, Graham (1994) Color Constancy and a Changing Illumination. In: Human Vision, Visual Processing and Digital Display V, 1994-02-08 - 1994-02-10.

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The color constancy problem has proven to be very hard to solve. This is even true in the simple Mondriaan world where a planar patchwork of matte surfaces is viewed under a single illuminant. In this paper we consider the color constancy problem given two images of a Mondriaan viewed under different illuminants. We show that if surface reflectances are well modeled by 3 basis functions and illuminants by up to 5 basis functions then we can, theoretically, solve for color constancy given 3 surfaces viewed under 2 illuminants. The number of recoverable dimensions in the illuminant depends on the spectral characteristics of the sensors. Specifically if for a given sensor set a von Kries type, diagonal model of color constancy is sufficient then we show that at most 2 illuminant parameters can be retrieved. Recent work has demonstrated that for the human visual system a diagonal matrix is a good model of color constancy given an appropriate choice of sensor basis. We might predict therefore, that we can recover at most 2 illuminant parameters. We present simulations which indicate that this in fact the case.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: human vision, digital display, spie, visual processing, imaging science
Faculty \ School: Faculty of Science > School of Computing Sciences
UEA Research Groups: Faculty of Science > Research Groups > Interactive Graphics and Audio
Faculty of Science > Research Groups > Colour and Imaging Lab
Depositing User: Pure Connector
Date Deposited: 24 Nov 2014 15:02
Last Modified: 20 Jun 2023 14:36
DOI: 10.1117/12.172686

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