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Probabilistic Human Recognition from Video

  • Shaohua Zhou
  • Rama Chellappa
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 2352)

Abstract

This paper presents a method for incorporating temporal information in a video sequence for the task of human recognition. A time series state space model, parameterized by a tracking state vector and a recognizing identity variable, is proposed to simultaneously characterize the kinematics and identity. Two sequential importance sampling (SIS) methods, a brute-force version and an efficient version, are developed to provide numerical solutions to the model. The joint distribution of both state vector and identity variable is estimated at each time instant and then propagated to the next time instant. Marginalization over the state vector yields a robust estimate of the posterior distribution of the identity variable. Due to the propagation of identity and kinematics, a degeneracy in posterior probability of the identity variable is achieved to give improved recognition. This evolving behavior is characterized using changes in entropy. The effectiveness of this approach is illustrated using experimental results on low resolution face data and upper body data.

Keywords

Posterior Probability State Vector Face Recognition Video Sequence Conditional Entropy 
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 2002

Authors and Affiliations

  • Shaohua Zhou
    • 1
  • Rama Chellappa
    • 1
  1. 1.Center for Automation Research (CfAR) Department of Electrical and Computer EngineeringUniversity of MarylandCollege Park

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