Illuminant estimation of natural scene using the sensor correlation method

Shoji Tominaga; Atsushi Ishida; Brian A. Wandell

doi:10.1117/12.464643

6 June 2002 Illuminant estimation of natural scene using the sensor correlation method

Shoji Tominaga, Atsushi Ishida, Brian A. Wandell

Proceedings Volume 4421, 9th Congress of the International Colour Association; (2002) https://doi.org/10.1117/12.464643
Event: 9th Congress of the International Color Association, 2001, Rochester, NY, United States

Abstract

This paper describes practical algorithms and experimental results using the sensor correlation method. We improve the algorithms to increase the accuracy and applicability to a variety of scenes. First, we use the reciprocal scale of color temperature, called 'mired,' in order to obtain perceptually uniform illuminant classification. Second, we propose to calculate correlation values between the image color gamut and the reference illuminant gamut, rather than between the image pixels and the illuminant gamuts. Third, we introduce a new image scaling operation with an adjustable parameter to adjust overall intensity differences between images and find a good fit to the illuminant gamuts. Finally, the image processing algorithms incorporating these changes are evaluated using a real image database.

Citation Download Citation

Shoji Tominaga, Atsushi Ishida, and Brian A. Wandell "Illuminant estimation of natural scene using the sensor correlation method", Proc. SPIE 4421, 9th Congress of the International Colour Association, (6 June 2002); https://doi.org/10.1117/12.464643

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