Physics-based modelling of human skin color under mixed illuminants

摘要

Skin colour is an often used feature in human face and motion tracking. It has the advantages of being orientation and size invariant and it is fast to process. The major disadvantage is that it becomes unreliable if the illumination changes. In this paper, skin colour is modelled based on a reflectance model of the skin, the parameters of the camera and light sources. In particular, the location of the skin colour area in the chromaticity plane is modelled for different and mixed light sources. The model is empirically validated. It has applications in adaptive segmentation of skin colour and in the estimation of the current illumination in camera images containing skin colour.