Cited by 26EEG and Brain-Computer InterfacesEmotion and Mood RecognitionAdvanced Graph Neural Networks

A data augmentation scheme for geometric deep learning in personalized brain–computer interfaces.

Open access
Kalaganis, Fotis P., Laskaris, Nikolaos A., Chatzilari, Elisavet, Nikolopoulos, Spiros, Kompatsiaris, Ioannis·2020·IEEE Access

Abstract

Electroencephalography signals inherently deviate from the notion of regular spatial sampling, as they reflect the coordinated action from multiple distributed overlapping cortical networks. Hence, the observed brain dynamics are influenced both by the topology of the sensor array and the underlying functional connectivity. Neural engineers are currently exploiting the advances in the domain of graph signal processing in an attempt to create robust and reliable brain decoding systems. In this direction, Geometric Deep Learning is a highly promising concept for combining the benefits of graph signal processing and deep learning towards revolutionising Brain-Computer Interfaces (BCIs). However, its exploitation has been hindered by its data-demanding character. As a remedy, we propose here a novel data augmentation approach that combines the multiplex network modelling of multichannel signal with a graph variant of the classical Empirical Mode Decomposition (EMD), and which proves to be a strong asset when combined with Graph Convolutional Neural Networks (GCNNs). As our graph-EMD algorithm makes no assumptions with respect to linearity and stationarity, it appears as an appealing solution towards analysing brain signals without artificially imposing regularities in either temporal or spatial domain. Our experimental results indicate that the proposed scheme for data augmentation leads to substantial improvement when it is combined with GCNNs. Using recordings from two distinct BCI applications and comparing against a state-of-the-art augmentation method, we illustrate the benefits from its use. By making it available to BCI community, we hope to further foster the application of geometric deep learning in the field.

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Crossref · 10.1109/access.2020.3021580

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  • Integrating graph CNN with DA obtained more stable performance in a sustained attention driving task.

    “The experimental results show that the exploration of the graph structure of EEG signal could reflect the spatial feature of signal and the methodology of integrating graph CNN with DA has obtained a more stable performance.”

    From Data Augmentation for Deep Neural Networks Model in EEG Classification Task: A Review (2021) · cites this paper as Kalaganis et al., 2020

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Authors
Kalaganis, F. P., Laskaris, N. A., Chatzilari, E., Nikolopoulos, S., & Kompatsiaris, I.
Affiliations
  • Aristotle University of Thessaloniki (GR)
  • Information Technologies Institute (GR)
Venue
IEEE Access
Published
2020
Volume
8
Pages
162218-162229
ISSN
2169-3536 (ISSN-L)
OpenAlex
W3083221507
Cited by
26
References
39
Citations by year
2025: 5 · 2024: 4 · 2023: 7 · 2022: 6 · 2021: 4
FWCI
2.28
Type
journal article
Language
en
Open access
Locations
  • IEEE Access (publishedVersion, cc-by)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
  • Horizon 2020 Framework Programme (644780)
  • European Union and Greek national funds through the Operational Program Competitiveness Entrepreneurship and Innovation (T1EDK-02454)
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › EEG and Brain-Computer Interfaces
  • Social Sciences › Psychology › Experimental and Cognitive Psychology › Emotion and Mood Recognition
  • Physical Sciences › Computer Science › Artificial Intelligence › Advanced Graph Neural Networks
Keywords
data augmentation, geometric deep learning, brain-computer interface, EEG, graph convolutional networks, multiplex networks, graph signal processing, EEG signal analysis, brain decoding

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