@inproceedings{ijcai2009p286,
  title     = {Abnormal Activity Recognition Based on HDP-HMM Models},
  author    = {Hu, Derek Hao and Zhang, Xian-Xing and Yin, Jie and Zheng, Vincent Wenchen and Yang, Qiang},
  booktitle = {Proceedings of the Twenty-First International Joint Conference on
               Artificial Intelligence, {IJCAI-09}},
  publisher = {International Joint Conferences on Artificial Intelligence},
  editor    = {Hiroaki Kitano},
  pages     = {1715--1719},
  year      = {2009},
  url       = {https://ijcai.org/proceedings/2009/286},
}