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Classification of sporting activities using smartphone accelerometers

Mitchell, Edmond, Monaghan, David orcid logoORCID: 0000-0002-5169-9902 and O'Connor, Noel E. orcid logoORCID: 0000-0002-4033-9135 (2013) Classification of sporting activities using smartphone accelerometers. Sensors, 13 (4). pp. 5317-5337. ISSN 1424-8220

Abstract
In this paper we present a framework that allows for the automatic identification of sporting activities using commonly available smartphones. We extract discriminative informational features from smartphone accelerometers using the Discrete Wavelet Transform (DWT). Despite the poor quality of their accelerometers, smartphones were used as capture devices due to their prevalence in today’s society. Successful classification on this basis potentially makes the technology accessible to both elite and non-elite athletes. Extracted features are used to train different categories of classifiers. No one classifier family has a reportable direct advantage in activity classification problems to date; thus we examine classifiers from each of the most widely used classifier families. We investigate three classification approaches; a commonly used SVM-based approach, an optimized classification model and a fusion of classifiers. We also investigate the effect of changing several of the DWT input parameters, including mother wavelets, window lengths and DWT decomposition levels. During the course of this work we created a challenging sports activity analysis dataset, comprised of soccer and field-hockey activities. The average maximum F-measure accuracy of 87% was achieved using a fusion of classifiers, which was 6% better than a single classifier model and 23% better than a standard SVM approach.
Metadata
Item Type:Article (Published)
Refereed:Yes
Uncontrolled Keywords:smartphone; classification; sport
Subjects:Computer Science > Machine learning
Medical Sciences > Sports sciences
DCU Faculties and Centres:Research Initiatives and Centres > CLARITY: The Centre for Sensor Web Technologies
Publisher:MDPI
Official URL:http://www.mdpi.com/1424-8220/13/4/5317
Copyright Information:© 2013 MDPI
Use License:This item is licensed under a Creative Commons Attribution-NonCommercial-Share Alike 3.0 License. View License
ID Code:18074
Deposited On:23 Apr 2013 08:45 by Edmond Mitchell . Last Modified 22 Oct 2018 14:30
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