Hidden Markov models for modeling and recognizing gesture under variation

  • Authors:
  • Andrew D. Wilson;Aaron F. Bobick

  • Affiliations:
  • MIT Media Laboratory, Cambridge, MA;Georgia Institute of Technology, Atlanta

  • Venue:
  • Hidden Markov models
  • Year:
  • 2001

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Abstract

Conventional application of hidden Markov models to the task ofrecognizing human gesture may suffer from multiple sources ofsystematic variation in the sensor outputs. We present twoframeworks based on hidden Markov models which are designed tomodel and recognize gestures that vary in systematic ways. In thefirst, the systematic variation is assumed to be communicative innature, and the input gesture is assumed to belong to gesturefamily. The variation across the family is modeled explicityby the parametric hidden Markov model (PHMM). In the secondframework, variation in the signal is overcome by relying on onlinelearning rather than conventional offline, batch learning.