Activity recognition in smart homes with self verification of assignments

Fahad, L. G., Khan, A. U. & Rajarajan, M. (2015). Activity recognition in smart homes with self verification of assignments. Neurocomputing, 149(C), pp. 1286-1298. doi: 10.1016/j.neucom.2014.08.069

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Abstract

Activity recognition in smart homes provides valuable benefits in the field of health and elderly care by remote monitoring of patients. In health care, capabilities of both performing the correct recognition and reducing the wrong assignments are of high importance. The novelty of the proposed activity recognition approach lies in being able to assign a category to the incoming activity, while measuring the confidence score of the assigned category that reduces the false positives in the assignments. Multiple sensors deployed at different locations of a smart home are used for activity observations. For multi-class activity classification, we propose a binary solution using support vector machines, which simplifies the problem to correct/incorrect assignments. We obtain the confidence score of each assignment by estimating the activity distribution within each class such that the assignments with low confidence are separated for further investigation by a human operator. The proposed approach is evaluated using a comprehensive performance evaluation metrics. Experimental results obtained from nine publicly available smart home datasets demonstrate a better performance of the proposed approach compared to the state of the art.

Item Type: Article
Additional Information: NOTICE: this is the author’s version of a work that was accepted for publication in Neurocomputing. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Neurocomputing, Volume 149, Part C, 3 February 2015, Pages 1286–1298, http://dx.doi.org.10.1016/j.neucom.2014.08.069
Uncontrolled Keywords: Activity recognition, Assisted living, Clustering, Performance evaluation metrics, Classification, Reliability
Subjects: T Technology > T Technology (General)
Divisions: School of Engineering & Mathematical Sciences > Engineering
URI: http://openaccess.city.ac.uk/id/eprint/4782

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