Noise Reduction in Brainwaves by Using Both EEG Signals and Frontal Viewing Camera Images

被引:18
作者
Bang, Jae Won [1 ]
Choi, Jong-Suk [1 ]
Park, Kang Ryoung [1 ]
机构
[1] Dongguk Univ Seoul, Div Elect & Elect Engn, Seoul 100715, South Korea
基金
新加坡国家研究基金会;
关键词
EEG; BCI; LDA; SVM; COMPUTER INTERFACES; ARTIFACT REMOVAL; GAZE-TRACKING; CLASSIFICATION; ERROR; P300;
D O I
10.3390/s130506272
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
Electroencephalogram (EEG)-based brain-computer interfaces (BCIs) have been used in various applications, including human-computer interfaces, diagnosis of brain diseases, and measurement of cognitive status. However, EEG signals can be contaminated with noise caused by user's head movements. Therefore, we propose a new method that combines an EEG acquisition device and a frontal viewing camera to isolate and exclude the sections of EEG data containing these noises. This method is novel in the following three ways. First, we compare the accuracies of detecting head movements based on the features of EEG signals in the frequency and time domains and on the motion features of images captured by the frontal viewing camera. Second, the features of EEG signals in the frequency domain and the motion features captured by the frontal viewing camera are selected as optimal ones. The dimension reduction of the features and feature selection are performed using linear discriminant analysis. Third, the combined features are used as inputs to support vector machine (SVM), which improves the accuracy in detecting head movements. The experimental results show that the proposed method can detect head movements with an average error rate of approximately 3.22%, which is smaller than that of other methods.
引用
收藏
页码:6272 / 6294
页数:23
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