Diagonal Transforms Suffice For Color Constancy: Proceedings of the Fourth International Conference on Computer Vision

Graham Finlayson, M. S. Drew, B. V. Funt

Research output: Contribution to conferencePaper

75 Citations (Scopus)

Abstract

The main result is to show that under the conditions imposed by the Maloney-Wandell color constancy algorithm, color constancy can be expressed in terms of a simple independent adjustment of the sensor responses, so long as the sensor space is first transformed to a new basis. The overall goal is to present a theoretical analysis connecting many established theories of color constancy. For the case where surface reflectances are two-dimensional and illuminants are three-dimensional, it is proved that perfect color constancy can always be solved for by an independent adjustment of sensor responses, which means that the color constancy transform can be expressed as a diagonal matrix. In addition to purely theoretical arguments, results from simulations of diagonal-matrix-based color constancy, in which the spectra of real illuminants and reflectances along with the human cone sensitivity functions were used, are presented. The simulations demonstrate that when the cone sensor space is transformed to its new basis in the appropriate manner, a diagonal matrix supports close to optimal color constancy
Original languageEnglish
Pages164-171
Number of pages8
DOIs
Publication statusPublished - 1993
EventComputer Vision, 1993. Proceedings., Fourth International Conference on - , United Kingdom
Duration: 11 May 199314 May 1993

Conference

ConferenceComputer Vision, 1993. Proceedings., Fourth International Conference on
CountryUnited Kingdom
Period11/05/9314/05/93

Cite this