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Published in: Neural Computing and Applications 12/2019

16-03-2019 | Original Article

A novel feature extraction method for machine learning based on surface electromyography from healthy brain

Authors: Gongfa Li, Jiahan Li, Zhaojie Ju, Ying Sun, Jianyi Kong

Published in: Neural Computing and Applications | Issue 12/2019

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Abstract

Feature extraction is one of most important steps in the control of multifunctional prosthesis based on surface electromyography (sEMG) pattern recognition. In this paper, a new sEMG feature extraction method based on muscle active region is proposed. This paper designs an experiment to classify four hand motions using different features. This experiment is used to prove that new features have better classification performance. The experimental results show that the new feature, active muscle regions (AMR), has better classification performance than other traditional features, mean absolute value (MAV), waveform length (WL), zero crossing (ZC) and slope sign changes (SSC). The average classification errors of AMR, MAV, WL, ZC and SSC are 13%, 19%, 26%, 24% and 22%, respectively. The new EMG features are based on the mapping relationship between hand movements and forearm active muscle regions. This mapping relationship has been confirmed in medicine. We obtain the active muscle regions data from the original EMG signal by the new feature extraction algorithm. The results obtained from this algorithm can well represent hand motions. On the other hand, the new feature vector size is much smaller than other features. The new feature can narrow the computational cost. This proves that the AMR can improve sEMG pattern recognition accuracy rate.

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Metadata
Title
A novel feature extraction method for machine learning based on surface electromyography from healthy brain
Authors
Gongfa Li
Jiahan Li
Zhaojie Ju
Ying Sun
Jianyi Kong
Publication date
16-03-2019
Publisher
Springer London
Published in
Neural Computing and Applications / Issue 12/2019
Print ISSN: 0941-0643
Electronic ISSN: 1433-3058
DOI
https://doi.org/10.1007/s00521-019-04147-3

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