Feature Extraction With Stacked Autoencoders for EEG Channel Reduction in Emotion Recognition.

Autor: Vafaei E; Department of Biomedical Engineering, Faculty of Medical Sciences and Technologies, Science and Research Branch, Islamic Azad University, Tehran, Iran., Nowshiravan Rahatabad F; Department of Biomedical Engineering, Faculty of Medical Sciences and Technologies, Science and Research Branch, Islamic Azad University, Tehran, Iran., Setarehdan SK; School of Electrical and Computer Engineering, University of Tehran, Tehran, Iran., Azadfallah P; Faculty of Humanities, Tarbiat Modares University, Tehran, Iran.
Jazyk: angličtina
Zdroj: Basic and clinical neuroscience [Basic Clin Neurosci] 2024 May-Jun; Vol. 15 (3), pp. 393-402. Date of Electronic Publication: 2024 May 01.
DOI: 10.32598/bcn.2023.5138.2
Abstrakt: Introduction: Emotion recognition by electroencephalogram (EEG) signals is one of the complex methods because the extraction and recognition of the features hidden in the signal are sophisticated and require a significant number of EEG channels. Presenting a method for feature analysis and an algorithm for reducing the number of EEG channels fulfills the need for research in this field.
Methods: Accordingly, this study investigates the possibility of utilizing deep learning to reduce the number of channels while maintaining the quality of the EEG signal. A stacked autoencoder network extracts optimal features for emotion classification in valence and arousal dimensions. Autoencoder networks can extract complex features to provide linear and non- linear features which are a good representative of the signal.
Results: The accuracy of a conventional emotion recognition classifier (support vector machine) using features extracted from SAEs was obtained at 75.7% for valence and 74.4% for arousal dimensions, respectively.
Conclusion: Further analysis also illustrates that valence dimension detection with reduced EEG channels has a different composition of EEG channels compared to the arousal dimension. In addition, the number of channels is reduced from 32 to 12, which is an excellent development for designing a small-size EEG device by applying these optimal features.
(Copyright© 2024 Iranian Neuroscience Society.)
Databáze: MEDLINE
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