arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2012.03533cs.HC
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会话无关脑机接口的领域泛化

Domain Generalization for Session-Independent Brain-Computer Interface

Dong-Kyun Han, Ji-Hoon Jeong

摘要:

脑电(EEG)的个体间/个体内变异性给脑机接口(BCI)的实际应用带来了困难。通常,BCI系统需要校准过程来获取对象/会话特定数据,以在每次使用系统时调整模型。这个问题被认为是脑机接口的一个主要障碍,为了克服这个问题,最近出现了一种基于领域泛化(DG)的方法。本文的主要目的是重新考虑零校准问题的BCI的现实情况下,可以克服从DG任务的角度。在现实的情况下,我们专注于创建一个EEG分类框架,可以直接应用于看不见的会话,只使用多个主题/会话数据采集以前。因此,在本文中,我们通过leave-one-session-out验证测试了四种深度学习模型和四种DG算法。我们的实验表明,更深和更大的模型在跨会话泛化性能方面是有效的。此外,我们发现,没有显式DG算法优于经验风险最小化。最后,通过比较使用特定于主题的数据进行微调的结果,我们发现特定于主题的数据可能会由于会话间的变化而使看不见的会话分类性能恶化。

英文摘要:

The inter/intra-subject variability of electroencephalography (EEG) makes the practical use of the brain-computer interface (BCI) difficult. In general, the BCI system requires a calibration procedure to acquire subject/session-specific data to tune the model every time the system is used. This problem is recognized as a major obstacle to BCI, and to overcome it, an approach based on domain generalization (DG) has recently emerged. The main purpose of this paper is to reconsider how the zero-calibration problem of BCI for a realistic situation can be overcome from the perspective of DG tasks. In terms of the realistic situation, we have focused on creating an EEG classification framework that can be applied directly in unseen sessions, using only multi-subject/-session data acquired previously. Therefore, in this paper, we tested four deep learning models and four DG algorithms through leave-one-session-out validation. Our experiment showed that deeper and larger models were effective in cross-session generalization performance. Furthermore, we found that none of the explicit DG algorithms outperformed empirical risk minimization. Finally, by comparing the results of fine-tuning using subject-specific data, we found that subject-specific data may deteriorate unseen session classification performance due to inter-session variability.

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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