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Machine Vision and Applications

, Volume 25, Issue 1, pp 85–98 | Cite as

Selection of negative samples and two-stage combination of multiple features for action detection in thousands of videos

  • G. J. BurghoutsEmail author
  • K. Schutte
  • H. Bouma
  • R. J. M. den Hollander
Special Issue Paper

Abstract

In this paper, a system is presented that can detect 48 human actions in realistic videos, ranging from simple actions such as ‘walk’ to complex actions such as ‘exchange’. We propose a method that gives a major contribution in performance. The reason for this major improvement is related to a different approach on three themes: sample selection, two-stage classification, and the combination of multiple features. First, we show that the sampling can be improved by smart selection of the negatives. Second, we show that exploiting all 48 actions’ posteriors by two-stage classification greatly improves its detection. Third, we show how low-level motion and high-level object features should be combined. These three yield a performance improvement of a factor 2.37 for human action detection in the visint.org test set of 1,294 realistic videos. In addition, we demonstrate that selective sampling and the two-stage setup improve on standard bag-of-feature methods on the UT-interaction dataset, and our method outperforms state-of-the-art for the IXMAS dataset.

Keywords

Human action detection Sparse representation Pose estimation Interactions between people Spatiotemporal features STIP Tracking of humans Person detection  Event recognition  Random forest Support vector machines 

Notes

Acknowledgments

This work is supported by DARPA (mind’s eye program). The content of the information does not necessarily reflect the position or the policy of the US Government, and no official endorsement should be inferred. The authors acknowledge the CORTEX scientists for their significant contributions to the overall system: S. P. van den Broek, P. Hanckmann, J-W Marck, L. de Penning, J-M ten Hove, S. Landsmeer, C. van Leeuwen, A. Halma, M. Kruithof, S. Korzec, W. Ledegang and R. Wijn. Figure 3 has been contributed by E. Boertjes.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • G. J. Burghouts
    • 1
    Email author
  • K. Schutte
    • 1
  • H. Bouma
    • 1
  • R. J. M. den Hollander
    • 1
  1. 1.Intelligent ImagingTNOThe HagueThe Netherlands

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