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Variations of Grey World for face tracking

Buenoposada J., Baumela L.

Image Processing & Communications

2001

Vol. 7, no 3-4

51--61

This paper deals with the problem of colour constancy for real-time face tracking. We present two extensions of the Grey World (GW) algorithm in order to deal with dynamic image sequences with varying illumination intensity. The first extension consists in a new colour normalisation, the Projective Grey World Normalisation, which makes GW more robust to illumination intensity variations. The second extension, the Dynamic Grey World Algorithm, permits the use of GW with dynamic image sequences. We have conducted several experiments with these extensions and compared the results obtained with the rg- normalisation algorithm, possibly the most popular colour constancy procedure among the face tracking community.