1. A. Gee, R. Cipolla, Estimating gaze from a single view of a face, in: Proceedings of IEEE International Conference on Computer Vision and Pattern Recognition, 1994, pp. 758–760.
2. Estimating 3D facial pose using the EM algorithm;Choi,1998
3. T. Horprasert, Y. Yacoob, L. S. Davis, Computing 3-D head orientation from a monocular image sequence, in: Proceedings of IEEE Conference on Automatic Face and Gesture Recognition, 1996, pp. 242–247.
4. B.Tordoff, W.W.Mayol, T.E.de Campos, D.W.Murry, Head pose estimation for wearable robot control, in: Proceedings of British Machine Vision Conference, 2002, pp. 807–816.
5. S. Gong, E.Ong, S.Mckenna, Learning to associate faces across views in vector space of similarities to prototypes, in: Proceedings of BMVC, 1998, pp. 272–275.