[1] McKenna S J, Jabri S, Duric Z, et al. Tracking groups of people [J]. Computer Vision and Image Understanding, 2000, 80(1): 42-56.
[2] Rittscher J, Kato J, Joga S, et al. A probabilistic background model for tracking [A]. In: Proceedings of the 6th European Conference on Computer Vision [C]. Dublin, Ireland, 2000. 336-350.
[3] Wren C, Pentland A. Pfinder: real-time tracking of the human body [J]. IEEE Transaction on Pattern Analysis
and Machine Intelligence, 1997, 19(7): 780-785.
[4] Friedman N, Russell S. Image segmentation in video sequences: a probabilistic approach [A]. In: Proceedings of the 13th Conference on Uncertainty in Artificial Intelligence [C]. San Francisco, CA: Morgan Kaufmann Publishers, 1997. 175-181.
[5] Stauffer C, Grimson W E L. Learning patterns of activity using real-time tracking [J]. IEEE Transactions on Pattern Analysis and Machine Intelligence, 2000, 22(8): 747-757.
[6] Haritaoglu I, Harwood D, Davis L S. W4: real-time surveillance of people and their activities [J]. IEEE Transactions on Pattern Analysis and Machine Intelligence, 2000, 22(8): 809-830.
[7] Toyama K, Krumm J, Brumitt B, et al. Wallflower: principles and practice of background maintenance [A]. In: Proceedings of International Conference on Computer Vision [C]. Kerkyra, Greece, 1999. 255-261.
[8] Elgammal A, Harwood D, Davis L S. Non-parametric model for background subtraction [A]. In: Proceedings of the 6th European Conference on Computer Vision [C]. Dublin, Ireland, 2000. 751-767.
[9] Manjunath B S, Ohm J R, Vasudevan V V, et al. Color and texture descriptors [J]. IEEE Transactions on Circuits and Systems for Video Technology, 2001, 11(6): 703-715.
[10] Prati A, Cucchiara R, Mikic I, et al. Analysis and detection of shadows in video streams: a comparative evaluation [A]. In: Proceedings of IEEE International Conference on Computer Vision and Pattern Recognition [C]. Kauai, Hawaii, 2001. 571-576.