An improved technique for 3D head tracking under varying illumination conditions is proposed. The head is modeled as a texture mapped cylinder.
Tracking is formulated as an image registration problem in the cylinder's texture map image.
The resulting dynamic texture map provides a stabilized view of the face that can be used as input to many existing 2D techniques for face recognition, facial expressions analysis, lip reading, and eye tracking. To solve the registration problem in the presence of lighting variation and head motion, the residual error of registration is modeled as a linear combination of texture warping templates and orthogonal illumination templates. 21, no.6, June 1999. An Approach Based on Registration of Texture-Mapped 3D Models, IEEE PAMI, vol. 21, no.6, June 1999.