HHMM based recognition of human activity

Daiki Kawanaka, Takayuki Okatani, Koichiro Deguchi

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)


In this paper, we present a method for recognition of human activity as a series of actions from an image sequence. The difficulty with the problem is that there is a chicken-egg dilemma that each action needs to be extracted in advance for its recognition but the precise extraction is only possible after the action is correctly identified. In order to solve this dilemma, we use as many models as actions of our interest, and test each model against a given sequence to find a matched model for each action occurring in the sequence. For each action, a model is designed so as to represent any activity containing the action. The hierarchical hidden Markov model (HHMM) is employed to represent the models, in which each model is composed of a submodel of the target action and submodels which can represent any action, and they are connected appropriately. Several experimental results are shown.

Original languageEnglish
Pages (from-to)2180-2185
Number of pages6
JournalIEICE Transactions on Information and Systems
Issue number7
Publication statusPublished - 2006 Jul


  • Hierarchical hidden Markov model
  • Human activity
  • Image sequences
  • Motion trajectory

ASJC Scopus subject areas

  • Software
  • Hardware and Architecture
  • Computer Vision and Pattern Recognition
  • Electrical and Electronic Engineering
  • Artificial Intelligence


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