Color Facial Expression Recognition by Quaternion Convolutional Neural Network With Gabor Attention

Facial expression recognition (FER) plays an important role in cognitive psychology research. In FER studies, deep convolutional neural networks (CNNs) and attention mechanisms have shown great advantages over traditional techniques. Although many attention-based CNN models have been developed, most of them are proposed to deal with grayscale images. For color images, these network models usually ...