Application of multiscale fuzzy entropy features for multilevel subject-dependent emotion recognition

Abstract

Emotion recognition can be used in clinical and nonclinical situations. Despite previous works which mostlyused time and frequency features of electroencephalogram (EEG) signals in subject-dependent emotion recognitionissues, we used multiscale fuzzy entropy as a nonlinear dynamic feature. The EEG signals of the well-known Databasefor Emotion Analysis Using Physiological signals dataset was used for classification of two and three levels of emotionsin arousal and valence space. The compound feature selection with a cost of average accuracy of support vector machineclassifier was used to reduce feature dimensions. For subject-dependent systems, the proposed method is superior incomparison to previous works with 90.81% and 90.53% accuracies in two-level classification and 79.83% and 77.80%accuracies in three-level classification in arousal and valence dimensions, respectively.