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arXiv 2108.12295cs.HCcs.NAmath.NA
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用于脑机接口的运动表象分类模型:一种稀疏群滤波器组表示模型

Motor-imagery classification model for brain-computer interface: a sparse group filter bank representation model

Cancheng Li, Chuanbo Qin, Jing Fang

摘要:

背景资料:公共空间模式(CSP)已被广泛用于运动想象(MI)脑电图(EEG)记录的情况下的特征提取和脑机接口(BCI)应用中的MI分类。BCI通常需要相对较长的EEG数据来进行可靠的分类器训练。更具体地,在使用一般空间模式进行特征提取之前,使用来自两个不同类别的训练字典来构造复合字典矩阵,并且将滤波器带中的测试样本的表示估计为字典矩阵中的列的线性组合。新方法:缓解频带间稀疏小样本(SS)问题。提出了一种新的稀疏组滤波器组模型(SGFB),用于脑机接口系统中的运动想象。结果:我们执行一项任务,表示残差的基础上对应的非零相关系数的类别。此外,我们还在三个不同的时间窗口中使用约束滤波器带进行联合稀疏优化,以在多任务学习框架中提取鲁棒的CSP特征。为了验证该模型的有效性,我们在BCI竞赛的公开EEG数据集上进行了实验,并将其与其他竞赛方法进行了比较。与现有方法的比较:体面的分类性能不同的子带证实,我们的算法是一个很有前途的候选人,以提高基于MI的BCI性能。

英文摘要:

Background: Common spatial pattern (CSP) has been widely used for feature extraction in the case of motor imagery (MI) electroencephalogram (EEG) recordings and in MI classification of brain-computer interface (BCI) applications. BCI usually requires relatively long EEG data for reliable classifier training. More specifically, before using general spatial patterns for feature extraction, a training dictionary from two different classes is used to construct a compound dictionary matrix, and the representation of the test samples in the filter band is estimated as a linear combination of the columns in the dictionary matrix. New method: To alleviate the problem of sparse small sample (SS) between frequency bands. We propose a novel sparse group filter bank model (SGFB) for motor imagery in BCI system. Results: We perform a task by representing residuals based on the categories corresponding to the non-zero correlation coefficients. Besides, we also perform joint sparse optimization with constrained filter bands in three different time windows to extract robust CSP features in a multi-task learning framework. To verify the effectiveness of our model, we conduct an experiment on the public EEG dataset of BCI competition to compare it with other competitive methods. Comparison with existing methods: Decent classification performance for different subbands confirms that our algorithm is a promising candidate for improving MI-based BCI performance.

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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