期刊
NEUROCOMPUTING
卷 463, 期 -, 页码 566-579出版社
ELSEVIER
DOI: 10.1016/j.neucom.2021.08.067
关键词
Brain-computer interface (BCI); Motor imagery (MI); electroencephalography (EEG); Sparse learning (SL); Genetic algorithm (GA); Channel selection
资金
- Dazhi Scholarship of the Guangdong Polytechnic Normal University (GPNU)
- Education Department of Guangdong Province [2019KSYS009]
- Scientific and Technological Planning Projects of Guangdong Province [2021A0505030074]
- University of Strathclyde Scholarship
In this paper, a genetic algorithm-based band power feature sparse learning approach for EEG classification is proposed. The method outperforms conventional classifiers in terms of accuracy, sensitivity, and specificity, showing promising results for brain-computer interfacing applications.
In this paper, we present a genetic algorithm (GA) based band power feature sparse learning (SL) approach for classification of electroencephalogram (EEG) (GABSLEEG) in motor imagery (MI) based brain-computer interfacing (BCI). The band power in the alpha and beta bands was extracted from the EEG segments and used as features to construct the SL dictionary, in which the GA was employed for channel selection. The GABSLEEG system was tested in three functional areas: i) classification of MI data and idle state data; ii) performance with decreased training data size; and iii) computational efficiency. The system was evaluated by dividing the data into training, validation, and testing sets. The proposed GABSLEEG model is found to significantly outperform conventional classifiers, including the support vec-tor machine (SVM) classifier in (i-iii), and the random forest (RF) and the k-nearest neighbour (k-NN) classifiers in (i-ii). The GABSLEEG system consistently had a higher classification accuracy, sensitivity, and specificity. The average accuracy of the proposed system was 99.65%, on BCI Competition IV dataset 1 and 96.08% for BCI Competition III dataset IVa with the idle state included as a class, which was on a par with state-of-the-art SL and even deep learning approaches. (c) 2021 Elsevier B.V. All rights reserved.
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