Estimation of Illuminants From Projections on the Planckian Locus

Baptiste Mazin 1 Julie Delon 2 Yann Gousseau 1
1 LTCI - Laboratoire Traitement et Communication de l'Information
2 MAP5 - UMR 8145 - Mathématiques Appliquées à Paris 5
Abstract : This paper introduces a new approach for the automatic estimation of illuminants in a digital color image. The method relies on two assumptions. First, the image is supposed to contain at least a small set of achromatic pixels. The second assumption is physical and concerns the set of possible illuminants, assumed to be well approximated by black body radiators. The proposed scheme is based on a projection of selected pixels on the Planckian locus in a well chosen chromaticity space, followed by a voting procedure yielding the estimation of the illuminant. This approach is very simple and learning-free. The voting procedure can be extended for the detection of multiple illuminants when necessary. Experiments on various databases show that the performances of this approach are similar to those of the best learning-based state of the art algorithms.
Keywords : color constancy multi-illuminant
Type de document :
Article dans une revue
IEEE Transactions on Image Processing, Institute of Electrical and Electronics Engineers, 2015, 24 (6), pp. 1944 - 1955. 〈10.1109/TIP.2015.2405414〉
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Baptiste Mazin, Julie Delon, Yann Gousseau. Estimation of Illuminants From Projections on the Planckian Locus. IEEE Transactions on Image Processing, Institute of Electrical and Electronics Engineers, 2015, 24 (6), pp. 1944 - 1955. 〈10.1109/TIP.2015.2405414〉. 〈hal-00915853v3〉

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