Genetic-Algorithm-Based Feature-Selection Technique for Fall Detection Using Multi-placement Wearable Sensors

  • I Putu Edy Suardiyana Putra
  • Rein Vesilo
Conference paper
Part of the Internet of Things book series (ITTCC)


For a machine-learning-based fall-detection approach using wearable sensors, having a high number of features can not only cause a reduction in the detection rate because of irrelevant features, but it can also cause a high computational cost. Therefore, the number of features needs to be reduced through a feature-selection technique. However, current studies in fall-detection only consider features that can give an optimum detection rate without considering their computational cost. Having features with a high computational cost on wearable devices can cause their battery to drain fast. This paper presents a genetic-algorithm-based feature-selection technique that can search for a subset of low-computational-cost features from different sensor placements, where those features can give a relatively good detection rate in terms of F-score. The experimental results show that our technique is able to select a subset of low-computational-cost features that can achieve up to 97.7% of F-score on average. Compared to the SelectKBest and Recursive Feature Elimination (RFE) techniques (a filter and an embedded feature-selection technique, respectively), our approach is able to select features that can give a comparable F-score and significantly lower computational cost.



This work was supported by an International Macquarie University Research Excellence Scholarship (iMQRES) and a Coventry University studentship, under a co-tutelle scheme. The authors would like to thank Professor Elena Gaura and Dr. James Brusey (Coventry University) for their insightful inputs.


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Authors and Affiliations

  1. 1.School of EngineeringMacquarie UniversitySydneyAustralia

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