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CLC number: TP391.4

On-line Access: 2024-08-27

Received: 2023-10-17

Revision Accepted: 2024-05-08

Crosschecked: 2009-04-10

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Journal of Zhejiang University SCIENCE A 2009 Vol.10 No.6 P.810-819

http://doi.org/10.1631/jzus.A0820388


Bi-dimension decomposed hidden Markov models for multi-person activity recognition


Author(s):  Wei-dong ZHANG, Feng CHEN, Wen-li XU

Affiliation(s):  Department of Automation, Tsinghua University, Beijing 100084, China

Corresponding email(s):   zwd03@mails.tsinghua.edu.cn

Key Words:  Multi-channel setting, Hierarchical modeling, Hidden Markov model, Activity recognition


Wei-dong ZHANG, Feng CHEN, Wen-li XU. Bi-dimension decomposed hidden Markov models for multi-person activity recognition[J]. Journal of Zhejiang University Science A, 2009, 10(6): 810-819.

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author="Wei-dong ZHANG, Feng CHEN, Wen-li XU",
journal="Journal of Zhejiang University Science A",
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pages="810-819",
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%A Feng CHEN
%A Wen-li XU
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T1 - Bi-dimension decomposed hidden Markov models for multi-person activity recognition
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DOI - 10.1631/jzus.A0820388


Abstract: 
We present a novel model for recognizing long-term complex activities involving multiple persons. The proposed model, named ‘decomposed hidden Markov model’ (DHMM), combines spatial decomposition and hierarchical abstraction to capture multi-modal, long-term dependent and multi-scale characteristics of activities. Decomposition in space and time offers conceptual advantages of compaction and clarity, and greatly reduces the size of state space as well as the number of parameters. DHMMs are efficient even when the number of persons is variable. We also introduce an efficient approximation algorithm for inference and parameter estimation. Experiments on multi-person activities and multi-modal individual activities demonstrate that DHMMs are more efficient and reliable than familiar models, such as coupled HMMs, hierarchical HMMs, and multi-observation HMMs.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article

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