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Bidirectional integrated random fields for human behaviour understanding

Bidirectional integrated random fields for human behaviour understanding

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Proposed is a bidirectional integrated random fields (BIRF) model for human behaviour understanding. The traditional hidden-state conditional random fields (HCRF) and conditional random fields (CRF) are bridged by modifying the feature functions of both, which propagates sequence classification or segmentation information in-between. Consequently, the sequence classification result by HCRF and the sequence segmentation results by CRF can be utilised to supervise the decision of each other and the performance of both models will be boosted iteratively. Large-scale experiments show that the BIRF model can achieve competing performance with the state-of-the-art methods for human behaviour understanding.

References

    1. 1)
      • Wang, S.B., Quattoni, A., Morency, L.P.: `Hidden conditional random fields for gesture recognition', Proc. of IEEE Conf. on Computer Vision and Pattern Recognition, 2006, New York, USA, p. 1521–1527.
    2. 2)
      • Wang, J., Liu, P., She, M.: `Human action categorization using Conditional random field', Proc. IEEE Workshop on Robotic Intelligence In Informationally Structured Space, 2011, p. 131–135.
    3. 3)
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