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Wavelet Packet-Based Feature Extraction for Brain-Computer Interfaces

机译:基于小波包的脑机接口特征提取

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摘要

A novel feature extraction method of spontaneous electroencephalogram (EEG) signals for brain-computer interfaces (BCIs) is explored. The method takes the wavelet packet transform (WPT) as an analysis tool and utilizes two kinds of information. Firstly, EEG signals are transformed into wavelet packet coefficients by the WPT. And then average coefficient values and average power values of certain subbands are computed, which form initial features. Finally, part of average coefficient values and part of average power values with larger Fisher indexes are combined to form the feature vector. Compared with previous feature extraction methods, the proposed approach can lead to higher classification accuracy.
机译:探索了一种新颖的特征提取方法,用于脑 - 计算机接口(BCIS)的自发脑电图(EEG)信号。该方法将小波包变换(WPT)作为分析工具,并利用两种信息。首先,eEG信号由WPT转换为小波分组系数。然后计算某些子带的平均系数值和平均功率值,其形成初始特征。最后,平均系数值的一部分和具有较大Fisher索引的平均功率值的一部分组合以形成特征向量。与先前的特征提取方法相比,所提出的方法可以导致更高的分类精度。

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