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A novel EEG-based approach to classify emotions through phase space dynamics

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Abstract

Emotion recognition has drawn a great deal of attention in brain computer interface field. Researches have come to the conclusion that nonlinear features are more successful in emotion classification because of non-stationary and chaotic behavior of biological signals, especially electroencephalogram (EEG). In this study, a new method based on phase space dynamics and Poincare sections is introduced to classify emotions. This transformation quantifies the phase space and represents its characteristics in a new state space which can simply reflect the signal behavior. Not only are the proposed state space and quantifiers effective to appropriately describe nonlinear signal dynamics, but also this method successfully works in real-world applications like EEG-based emotion recognition. In this work, EEGs are transformed into the new state space and Poincare intersections are considered as features with the aim of classifying EEGs into four emotional groups based on arousal and valence values. A reliable dataset is used, and classification accuracy is about 82%. As results suggest, the proposed method and features are efficient in this task in comparison with previous studies employing the same dataset.

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Authors and Affiliations

  1. Department of Biomedical Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran

    Morteza Zangeneh Soroush & Keivan Maghooli

  2. Control and Intelligent Processing Centre of Excellence, School of Electrical and Computer Engineering, College of Engineering, University of Tehran, Tehran, Iran

    Seyed Kamaledin Setarehdan

  3. Department of Biomedical Engineering, Faculty of Engineering, Shahed University, Tehran, Iran

    Ali Motie Nasrabadi

Authors
  1. Morteza Zangeneh Soroush
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  2. Keivan Maghooli
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  3. Seyed Kamaledin Setarehdan
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  4. Ali Motie Nasrabadi
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Correspondence to Keivan Maghooli.

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Zangeneh Soroush, M., Maghooli, K., Setarehdan, S.K. et al. A novel EEG-based approach to classify emotions through phase space dynamics. SIViP 13, 1149–1156 (2019). https://doi.org/10.1007/s11760-019-01455-y

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  • DOI: https://doi.org/10.1007/s11760-019-01455-y

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