Preference model assisted activity recognition learning in a smart home environment

Authors:
Yi-Han Chen;Ching-Hu Lu;Kuo-Chung Hsu;Li-Chen Fu;Yu-Jung Yeh;Lun-Chia Kuo
Affiliations:
Dept. of Computer Science & Information Eng., National Taiwan University, Taiwan, R.O.C.;Dept. of Computer Science & Information Eng., National Taiwan University, Taiwan, R.O.C.;Dept. of Computer Science & Information Eng., National Taiwan University, Taiwan, R.O.C.;Dept. of Computer Science & Information Eng. and Dept. of Electrical Eng., National Taiwan University, Taiwan, R.O.C.;Internet Platform Technology Division, Industrial Technology Research Inst., Taiwan, R.O.C.;Information & Communications Research Laboratories, Industrial Technology Research Inst., Taiwan, R.O.C.
Venue:
IROS'09 Proceedings of the 2009 IEEE/RSJ international conference on Intelligent robots and systems
Year:
2009

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Abstract

Reliable recognition of activities from cluttered sensory data is challenging and important for a smart home to enable various activity-aware applications. In addition, understanding a user's preferences and then providing corresponding services is substantial in a smart home environment. Traditionally, activity recognition and preference learning were dealt with separately. In this work, we aim to develop a hybrid system which is the first trial to model the relationship between an activity model and a preference model so that the resultant hybrid model enables a preference model to assist in recovering performance of activity recognition in a dynamic environment. More specifically, on-going activity which a user performs in this work is regarded as high level contexts to assist in building a user's preference model. Based on the learned preference model, the smart home system provides more appropriate services to a user so that the hybrid system can better interact with the user and, more importantly, gain his/her feedback. The feedback is used to detect if there is any change in human behavior or sensor deployment such that the system can adjust the preference model and the activity model in response to the change. Finally, the experimental results confirm the effectiveness of the proposed approach.