Activity and Location Recognition Using Wearable Sensors
IEEE Pervasive Computing
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ISWC '03 Proceedings of the 7th IEEE International Symposium on Wearable Computers
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Recognition of hand movements using wearable accelerometers
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BodyNets '13 Proceedings of the 8th International Conference on Body Area Networks
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Human activity is one of the most important ingredients of context information. In wearable computing scenarios, activities such as walking, standing and sitting can be inferred from data provided by body-worn acceleration sensors. In such settings, most approaches use a single set of features, regardless of which activity to be recognized. In this paper we show that recognition rates can be improved by careful selection of individual features for each activity. We present a systematic analysis of features computed from a real-world data set and show how the choice of feature and the window length over which the feature is computed affects the recognition rates for different activities. Finally, we give a recommendation of suitable features and window lengths for a set of common activities.