Beijing Key Laboratory of Human-Computer Interaction;
Institute of Software;
Chinese Academy of Sciences Bcijing 100190;
China;
University of Chinese Academy of Sciences;
Beijing 100049;
China;
State Key Laboratory of Computer Science;
Institute of Software;
Chinese Academy of Sciences;
Beijing 100190;
China;
facial expression recognition; non-frontal head pose; depth; spatial-temporal; convolutional neural network;