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Estimation of Multiple Periodic Motions from Video

  • Alexia Briassouli
  • Narendra Ahuja
Part of the Lecture Notes in Computer Science book series (LNCS, volume 3951)

Abstract

The analysis of periodic or repetitive motions is useful in many applications, both in the natural and the man-made world. An important example is the recognition of human and animal activities. Existing methods for the analysis of periodic motions first extract motion trajectories, e.g. via correlation, or feature point matching. We present a new approach, which takes advantage of both the frequency and spatial information of the video. The 2D spatial Fourier transform is applied to each frame, and time-frequency distributions are then used to estimate the time-varying object motions. Thus, multiple periodic trajectories are extracted and their periods are estimated. The period information is finally used to segment the periodically moving objects. Unlike existing methods, our approach estimates multiple periodicities simultaneously, it is robust to deviations from strictly periodic motion, and estimates periodicities superposed on translations. Experiments with synthetic and real sequences display the capabilities and limitations of this approach. Supplementary material is provided, showing the video sequences used in the experiments.

Keywords

Video Sequence Motion Estimation Periodic Motion Real Sequence Period Estimate 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2006

Authors and Affiliations

  • Alexia Briassouli
    • 1
  • Narendra Ahuja
    • 1
  1. 1.Beckman InsituteUniversity of Illinois, Urbana-ChampaignUrbanaUSA

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