1. Pfinder: real-time tracking of the human body;Wren;IEEE Transactions on Pattern Analysis and Machine Intelligence,1997
2. Tracking interacting people;McKenna,2000
3. W4: who? when? where? a real time system for detecting and tracking people;Haritaoglu,1998
4. Active appearance models;Cootes,1998
5. Tracking colour objects using adaptive mixture models;McKenna;Image and Vision Computing,1999