1. School of Electrical and Electronic Engineering, Nanyang Technological University, Jurong West, Singapore
2. Faculty of Information Technology, College of Information and Communication Engineering, Beijing University of Technology, Beijing, China
3. Cyberspace Institute of Advanced Technology, Guangzhou University, Guangzhou, China
4. Department of Automation and also with the Key Laboratory of Smart Manufacturing in Energy Chemical Process, Ministry of Education, East China University of Science and Technology, Shanghai, China
5. Shenzhen Key Laboratory of Visual Object Detection and Recognition, Harbin Institute of Technology, Shenzhen, China