1. National Laboratory of Pattern Recognition (NLPR), Institute of Automation, Chinese Academy of Sciences (CASIA), Beijing, China
2. Mininglamp Academy of Sciences, Mininglamp Technology, Beijing, China
3. Faculty of Information Technology and Electrical Engineering, University of Oulu, Oulu, Finland
4. Baidu Research and National Engineering Laboratory for Deep Learning Technology and Application, Institute of Deep Learning, Beijing, China
5. Computer Vision Centre (CVC), Universitat de Barcelona (UB), Barcelona, Spain
6. Department of Computer Science and Technology, Tsinghua University, Beijing, China
7. Faculty of Innovation Engineering, Macau University of Science and Technology (MUST), Av. Wai Long, Macau, China
8. AI Lab, School of Engineer, Westlake University, Hangzhou, China