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  • Research Article
  • Open Access

Continuous Learning of a Multilayered Network Topology in a Video Camera Network

EURASIP Journal on Image and Video Processing20092009:460689

  • Received: 20 February 2009
  • Accepted: 23 September 2009
  • Published:


A multilayered camera network architecture with nodes as entry/exit points, cameras, and clusters of cameras at different layers is proposed. Unlike existing methods that used discrete events or appearance information to infer the network topology at a single level, this paper integrates face recognition that provides robustness to appearance changes and better models the time-varying traffic patterns in the network. The statistical dependence between the nodes, indicating the connectivity and traffic patterns of the camera network, is represented by a weighted directed graph and transition times that may have multimodal distributions. The traffic patterns and the network topology may be changing in the dynamic environment. We propose a Monte Carlo Expectation-Maximization algorithm-based continuous learning mechanism to capture the latent dynamically changing characteristics of the network topology. In the experiments, a nine-camera network with twenty-five nodes (at the lowest level) is analyzed both in simulation and in real-life experiments and compared with previous approaches.


  • Network Topology
  • Face Recognition
  • Directed Graph
  • Discrete Event
  • Traffic Pattern

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Authors’ Affiliations

Center for Research in Intelligent Systems, University of California, Riverside, CA 92521, USA


© Xiaotao Zou et al. 2009

This article is published under license to BioMed Central Ltd. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.