1. I. Haritaoglu, D. Harwood and L. Davis, W4S: a real-time system for detection and tracking people in 2.5D, in: Proc. ECCV, 1998
2. A.J. Lipton, H. Fujiyoshi, R.S. Patil, Moving target classification and tracking from real-time video, in: Proc. DARPA Image Understanding Workshop, vol. 1, November 1998, pp. 129–136
3. C. Papageorogiou, T. Evgeniou, T. Poggio, A trainable object detection system, in: Proc. DARPA Image Understanding Workshop, vol. 2, November 1998, pp. 1019–1024
4. A. Pentland, A. Azarbayjani, N. Oliver, M. Brand, Real-time 3-D tracking and classification of human behavior, in: Proc. DARPA Image Understanding Workshop, vol. 1, May 1997, pp. 193–200
5. F.Z. Brill, T.J. Olson, C. Tserng, Event recognition and reliability improvements for the autonomous video surveillance systems, in: Proc. DARPA Image Understanding Workshop, vol. 1, November 1998, pp. 267–284