1. First IEEE Workshop on Visual Surveillance, January 1998, Bombay, India
2. Second IEEE Workshop on Visual Surveillance, January 1999, Fort Collins, Colorado
3. Third IEEE International Workshop on Visual Surveillance (VS'2000), July 2000, Dublin, Ireland
4. First IEE Workshop on Intelligent Distributed Surveillance Systems, February 2003, London
5. Second IEE Workshop on Intelligent Distributed Surveillance Systems, February 2004, London