Facial expression recognition Face recognition 3 Facial Expressions 3 Human computer interaction 2 facial expression 2 Accuracy rate 1 Action Unit 1 Affective learning 1 Attention mechanisms 1 Basic emotions 1 Behavioral analysis 1 Biological signals 1 Classification (of information) 1 Computer games 1 Convolution neural network 1 Convolutional neural network 1 Convolutional neural networks 1 Deep learning 1 Emotion recognition 1 Extraction 1 F1 scores 1 Facial action 1 Facial action unit 1 Facial emotions 1 Facial recognition 1 Faster R-CNN 1 Feature information 1 Fusion features 1 Heart rate variability 1 Image database 1