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EEG-based emotion recognition with deep convolutional neural networks

  • Mehmet Akif Ozdemir ORCID logo EMAIL logo , Murside Degirmenci , Elif Izci und Aydin Akan
Veröffentlicht/Copyright: 25. August 2020
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Abstract

The emotional state of people plays a key role in physiological and behavioral human interaction. Emotional state analysis entails many fields such as neuroscience, cognitive sciences, and biomedical engineering because the parameters of interest contain the complex neuronal activities of the brain. Electroencephalogram (EEG) signals are processed to communicate brain signals with external systems and make predictions over emotional states. This paper proposes a novel method for emotion recognition based on deep convolutional neural networks (CNNs) that are used to classify Valence, Arousal, Dominance, and Liking emotional states. Hence, a novel approach is proposed for emotion recognition with time series of multi-channel EEG signals from a Database for Emotion Analysis and Using Physiological Signals (DEAP). We propose a new approach to emotional state estimation utilizing CNN-based classification of multi-spectral topology images obtained from EEG signals. In contrast to most of the EEG-based approaches that eliminate spatial information of EEG signals, converting EEG signals into a sequence of multi-spectral topology images, temporal, spectral, and spatial information of EEG signals are preserved. The deep recurrent convolutional network is trained to learn important representations from a sequence of three-channel topographical images. We have achieved test accuracy of 90.62% for negative and positive Valence, 86.13% for high and low Arousal, 88.48% for high and low Dominance, and finally 86.23% for like–unlike. The evaluations of this method on emotion recognition problem revealed significant improvements in the classification accuracy when compared with other studies using deep neural networks (DNNs) and one-dimensional CNNs.


Corresponding author: Mehmet Akif Ozdemir, Department of Biomedical Engineering, Izmir Katip Celebi University, Izmir, Turkey; and Department of Biomedical Technologies, Izmir Katip Celebi University, Izmir, Turkey, E-mail:

Funding source: Izmir Katip Celebi University

Award Identifier / Grant number: 2019-ONAP–MUMF-0001

Acknowledgments

This study was supported by Izmir Katip Celebi University Scientific Research Projects Coordination Unit: Project numbers: 2019-ONAP–MUMF-0001.

  1. Research funding: This work was funded by Izmir Katip Celebi University Scientific Research Projects Coordination Unit (project number: 2019-ONAP–MUMF-0001). All funding is for equipment for the research project. There is no available funding for publication.

  2. Author contributions: All authors have accepted responsibility for the entire content of this manuscript and approved its submission.

  3. Conflict of interest: Authors state no conflict of interest.

  4. Informed consent: Informed consent is not applicable.

  5. Ethical approval: The research related to human use complies with all the relevant national regulations and institutional policies. Human EEG data were obtained from the DEAP dataset which compiles all relevant ethical processes.

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Received: 2019-11-19
Accepted: 2020-06-16
Published Online: 2020-08-25
Published in Print: 2021-02-23

© 2020 Walter de Gruyter GmbH, Berlin/Boston

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