用少样本适配器实现跨被试脑电情绪识别,提升泛化能力。
FACE: Few-shot Adapter with Cross-view Fusion for Cross-subject EEG Emotion Recognition
- 通过跨视角动态融合全局脑连接与局部模式,增强信息互补。
- 在三个公开数据集上超越现有方法,在少样本下仍保持高准确率。
- 适合缺乏大量标注数据的跨被试情绪识别场景使用。
跨被试脑电情绪识别面临显著的个体差异和复杂的个体内变异挑战。现有方法主要依赖领域自适应或泛化策略,但通常需要大量目标被试数据,或对未见被试泛化能力有限。近期少样本学习尝试缓解此问题,但在少量样本下常出现灾难性过拟合。本文提出少样本适配器与跨视角融合方法(FACE),通过动态多视角融合与有效的个体特异性适配,提升性能。具体而言,FACE引入跨视角融合模块,利用被试特异性融合权重,动态整合全局脑连接与局部模式,提供互补情感信息。同时,提出少样本适配器模块,通过元学习增强适配器结构,实现对未见被试的快速适应并减少过拟合。在三个公开脑电情绪识别基准上的实验表明,FACE在泛化性能上优于当前最优方法,为标注数据有限的跨被试场景提供了实用解决方案。
原文摘要 · Abstract (English)
Cross-subject EEG emotion recognition is challenged by significant inter-subject variability and intricately entangled intra-subject variability. Existing works have primarily addressed these challenges through domain adaptation or generalization strategies. However, they typically require extensive target subject data or demonstrate limited generalization performance to unseen subjects. Recent few-shot learning paradigms attempt to address these limitations but often encounter catastrophic overfitting during subject-specific adaptation with limited samples. This article introduces the few-shot adapter with a cross-view fusion method called FACE for cross-subject EEG emotion recognition, which leverages dynamic multi-view fusion and effective subject-specific adaptation. Specifically, FACE incorporates a cross-view fusion module that dynamically integrates global brain connectivity with localized patterns via subject-specific fusion weights to provide complementary emotional information. Moreover, the few-shot adapter module is proposed to enable rapid adaptation for unseen subjects while reducing overfitting by enhancing adapter structures with meta-learning. Experimental results on three public EEG emotion recognition benchmarks demonstrate FACE's superior generalization performance over state-of-the-art methods. FACE provides a practical solution for cross-subject scenarios with limited labeled data.
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