Trajectory Analysis and Semantic Region Modeling Using Nonparametric Hierarchical Bayesian Models

@article{Wang2011TrajectoryAA,
  title={Trajectory Analysis and Semantic Region Modeling Using Nonparametric Hierarchical Bayesian Models},
  author={Xiaogang Wang and Keng Teck Ma and Gee Wah Ng and W. Eric L. Grimson},
  journal={International Journal of Computer Vision},
  year={2011},
  volume={95},
  pages={287-312}
}
We propose a novel framework of using a nonparametric Bayesian model, called Dual Hierarchical Dirichlet Processes (Dual-HDP) (Wang et al. in IEEE Trans. Pattern Anal. Mach. Intell. 31:539–555, 2009), for unsupervised trajectory analysis and semantic region modeling in surveillance settings. In our approach, trajectories are treated as documents and observations of an object on a trajectory are treated as words in a document. Trajectories are clustered into different activities. Abnormal… CONTINUE READING
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