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Affective EEG-based cross-session person identification using hierarchical graph embedding.

Honggang Liu1,2, Xuanyu Jin1,2, Dongjun Liu1,2

  • 1School of Computer Science, Hangzhou Dianzi University, Hangzhou, 310018 Zhejiang China.

Cognitive Neurodynamics
|November 18, 2024
PubMed
Summary
This summary is machine-generated.

This study introduces a new Multi-scale Convolution and Graph Pooling network (MCGP) for more accurate electroencephalogram (EEG) biometrics. The MCGP model effectively identifies individuals despite emotional state changes, enhancing confidential person identification.

Keywords:
Brain biometricsElectroencephalogram ((EEG))Embedding vectorGraph neural networksPerson identification

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Area of Science:

  • Neuroscience
  • Biometrics
  • Machine Learning

Background:

  • Electroencephalogram (EEG) signals are explored for confidential person identification.
  • Variations in affective (emotional) states pose a significant challenge to EEG-based biometrics due to the non-stationary nature of EEG signals.
  • Accurate EEG-based person identification requires methods robust to affective state fluctuations.

Purpose of the Study:

  • To develop and evaluate a novel deep learning network, the Multi-scale Convolution and Graph Pooling network (MCGP), for robust EEG-based person identification.
  • To mitigate the impact of affective state variations on the accuracy of EEG biometrics.
  • To assess the performance of MCGP across different datasets and experimental conditions, including cross-session identification with mixed and single affective states.

Main Methods:

  • An integrated Multi-scale Convolution and Graph Pooling network (MCGP) was employed.
  • The MCGP network utilized multiple 1D convolutions at different scales for dynamic feature extraction and fusion.
  • A graph pooling layer with an attention mechanism was incorporated to generate hierarchical graph embeddings, which were then fed into a fully connected classification layer.

Main Results:

  • MCGP achieved high average accuracies: 85.51% on SEED and 88.69% on SEED-V datasets in cross-session conditions with mixed affective states.
  • In single affective state cross-session scenarios, MCGP attained 85.75% (SEED) and 88.06% (SEED-V) for same affective states, and 79.57% (SEED) and 84.52% (SEED-V) for different affective states.
  • Results demonstrated that MCGP significantly mitigated the impact of affective state variations compared to baseline methods.

Conclusions:

  • The proposed MCGP network effectively addresses the challenge of affective state variations in EEG-based person identification.
  • MCGP offers a promising approach for enhancing the confidentiality and accuracy of biometric systems utilizing EEG signals.
  • Performance was slightly better when identifying individuals within the same affective state compared to across different affective states in cross-session evaluations.