arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2008.11227eess.SPcs.LG
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基于EEG运动想象的多类时频共同空间模式分析

A Computationally Efficient Multiclass Time-Frequency Common Spatial Pattern Analysis on EEG Motor Imagery

Virginia Tech(弗吉尼亚理工大学)

Ce Zhang, Azim Eskandarian

摘要:

共同空间模式(CSP)是一种流行的脑电(EEG)运动想象(MI)特征提取方法。本文对传统的CSP算法进行了改进,提高了多类MI分类的精度,并保证了计算过程的高效性。EEG MI数据是从脑机接口(BCI)竞赛IV中收集的。首先,对每一次实验进行带通滤波和时频分析。然后,根据信号能量的大小选择最优的脑电信号进行CSP特征提取。最后,提取的特征进行分类的三个分类器,线性判别分析(LDA),朴素贝叶斯(NVB),支持向量机(SVM),在并行的分类精度比较。实验结果表明,该算法的平均计算时间比第四届BCI竞赛第一名FBCSP算法减少了37.22%,比传统CSP算法增加了4.98%。对于分类率,与BCI竞赛IV的前3名获奖者相比,所提出的算法kappa值达到第二高。

英文摘要:

Common spatial pattern (CSP) is a popular feature extraction method for electroencephalogram (EEG) motor imagery (MI). This study modifies the conventional CSP algorithm to improve the multi-class MI classification accuracy and ensure the computation process is efficient. The EEG MI data is gathered from the Brain-Computer Interface (BCI) Competition IV. At first, a bandpass filter and a time-frequency analysis are performed for each experiment trial. Then, the optimal EEG signals for every experiment trials are selected based on the signal energy for CSP feature extraction. In the end, the extracted features are classified by three classifiers, linear discriminant analysis (LDA), naïve Bayes (NVB), and support vector machine (SVM), in parallel for classification accuracy comparison. The experiment results show the proposed algorithm average computation time is 37.22% less than the FBCSP (1st winner in the BCI Competition IV) and 4.98% longer than the conventional CSP method. For the classification rate, the proposed algorithm kappa value achieved 2nd highest compared with the top 3 winners in BCI Competition IV.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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