AutoFER: PCA and PSO based automatic facial emotion recognition

Abstract

Automatic emotion recognition is a critical part of human-machine interactions. Reflection of emotions and to develop its understanding is crucial to provide dealings across human beings and machine frameworks. This work determines an automatic system that distinguishes different emotions connoted on the face. The framework is deliberated to apply the hybridization of feature extraction and optimization using PCA and PSO, respectively, to accomplish a high precision rate. PCA is used to get high-quality feature vectors for each category of emotion. Swarm intelligence, optimization is applied to get an optimized feature vector which is essential for classifying the features in the testing phase. For exploratory work, the authors have considered the Japanese Female Facial Expression (JAFFE) dataset. A maximum classification rate of 94.97% is achieved with the proposed technique. The proposed framework execution is assessed in terms of the false rejection rate, false acceptance rate, and accuracy.