5S.-F.Lin,J.-Y.Chen,and H.-X.Chao.Estimation of number of people in crowded scenes using perspective transformation.Systems,Man and Cybernetics,Part A[J].IEEE Transactions,,2001,31 (6):645-654.
6R.Ma,L.Li,W.Huang,and Q.Tian.On pixel count based crowd density estimation for visual surveillance.Cybemetics and Intelligent Systems[C].2004 IEEE Conference,2004(1):.170-173.
7B.Boghossian and S.Velastin.Motion-based machine vision techniques for the management of large crowds.Electronics,Circuits and Systems,1999.Proceedings of ICECS' 99.The6th IEEE Intemational Conference[C].1999 (2):961-964.
8A.Davies,J.H.Yin,and S.Velastin.Crowd monitoring using image processing.Electronics & Communication Engineering Journal[J].1995,7(1) 37-47.
9E.Andrade,S.Blunsden,and R.Fisher.Hidden markov models for optical flow analysis in crowds.Pattern Recognition,2006[C].ICPR 2006 18th International Conference,2006 (1):460-463.
10E.L.Andrade,S.Blunsden,and R.B.Fisher.Modelling crowd scenes for event detection[C].In ICPR' 06:Proceedings of the 18th International Conference on Pattern Recognition,2006:175-178.