An Unsupervised Approach for Automatic Activity Recognition Based on Hidden Markov Model Regression

Abstract : Using supervised machine learning approaches to recognize human activities from on-body wearable accelerometers generally requires a large amount of labeled data.When ground truth information is not available, too expensive, time consuming or difficult to collect, one has to rely on unsupervised approaches. This paper presents a new unsupervised approach for human activity recognition from raw acceleration data measured using inertial wearable sensors. The proposed method is based upon joint segmentation of multidimensional time series using a Hidden Markov Model (HMM) in a multiple regression context. The model is learned in an unsupervised framework using the Expectation-Maximization (EM) algorithm where no activity labels are needed. The proposed method takes into account the sequential appearance of the data. It is therefore adapted for the temporal acceleration data to accurately detect the activities. It allows both segmentation and classification of the human activities. Experimental results are provided to demonstrate the efficiency of the proposed approach with respect to standard supervised and unsupervised classification approaches.
Mots-clés : RECONNAISSANCE REGRESSION
Type de document :
Article dans une revue
IEEE Transactions on Automation Science and Engineering, Institute of Electrical and Electronics Engineers, 2013, 3 (10), pp 829-335. <10.1109/TASE.2013.2256349>
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https://hal.archives-ouvertes.fr/hal-00865069
Contributeur : Ifsttar Cadic <>
Soumis le : lundi 23 septembre 2013 - 17:31:46
Dernière modification le : jeudi 28 janvier 2016 - 01:07:40

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Dorra Trabelsi, Samer Mohammed, Faicel Chamroukhi, Latifa Oukhellou, Yacine Amirat. An Unsupervised Approach for Automatic Activity Recognition Based on Hidden Markov Model Regression. IEEE Transactions on Automation Science and Engineering, Institute of Electrical and Electronics Engineers, 2013, 3 (10), pp 829-335. <10.1109/TASE.2013.2256349>. <hal-00865069>

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