Efficient approach for EEG‐based emotion recognition

Abstract

Identi fi cation of human emotion involving electroencephalogram (EEG) signals has become an emerging fi eld in health monitoring application as EEG signals can give us a more diverse insight on emotional states. The aim of this study is to develop an ef fi cient framework based on deep learning concept for automatic identi fi cation of human emotion from EEG signals. In the proposed framework, the signals are pre-processing for removing noises by low-pass fi ltering and then delta rhythm is extracted. After that, the extracted rhythm signals are converted into the EEG rhythm images by employing the continuous wavelet transform and then deep features are discovered by using a pre-trained convolutional neural networks model. Afterwards, MobileNetv2 is used for deep feature selection to obtain the most ef fi cient features and fi nally, long short term memory method is employed for classi fi cation of selected features. The proposed methodology is tested on ‘ DEAP EEG data set ’ (publicly available). This study considers two emotions namely ‘ Valence ’ and ‘ Arousal ’ for classi fi cation. The experimental results demonstrate that the proposed approach produced accuracies of 96.1% for low/ high valence and 99.6% for low/high arousal classi fi cation. A further comparison of the proposed method is also carried out and it is seen that the proposed method outperforms other compared methods.