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IEICE TRANSACTIONS on Information

Motion Pattern Study and Analysis from Video Monitoring Trajectory

Kai KANG, Weibin LIU, Weiwei XING

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Summary :

This paper introduces an unsupervised method for motion pattern learning and abnormality detection from video surveillance. In the preprocessing steps, trajectories are segmented based on their locations, and the sub-trajectories are represented as codebooks. Under our framework, Hidden Markov Models (HMMs) are used to characterize the motion pattern feature of the trajectory groups. The state of trajectory is represented by a HMM and has a probability distribution over the possible output sub-trajectories. Bayesian Information Criterion (BIC) is introduced to measure the similarity between groups. Based on the pairwise similarity scores, an affinity matrix is constructed which indicates the distance between different trajectory groups. An Adaptable Dynamic Hierarchical Clustering (ADHC) tree is proposed to gradually merge the most similar groups and form the trajectory motion patterns, which implements a simpler and more tractable dynamical clustering procedure in updating the clustering results with lower time complexity and avoids the traditional overfitting problem. By using the HMM models generated for the obtained trajectory motion patterns, we may recognize motion patterns and detect anomalies by computing the likelihood of the given trajectory, where a maximum likelihood for HMM indicates a pattern, and a small one below a threshold suggests an anomaly. Experiments are performed on EIFPD trajectory datasets from a structureless scene, where pedestrians choose their walking paths randomly. The experimental results show that our method can accurately learn motion patterns and detect anomalies with better performance.

Publication
IEICE TRANSACTIONS on Information Vol.E97-D No.6 pp.1574-1582
Publication Date
2014/06/01
Publicized
Online ISSN
1745-1361
DOI
10.1587/transinf.E97.D.1574
Type of Manuscript
PAPER
Category
Pattern Recognition

Authors

Kai KANG
  Beijing Jiaotong University,Beijing Key Laboratory of Advanced Information Science and Network Technology
Weibin LIU
  Beijing Jiaotong University,Beijing Key Laboratory of Advanced Information Science and Network Technology
Weiwei XING
  Beijing Jiaotong University

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