1. Shenzhen Key Laboratory of Visual Object Detection and Recognition, Harbin Institute of Technology, Shenzhen, China
2. School of Computer Science and Technology, Guangdong University of Technology, Guangzhou, China
3. Taipa, University of Macau, PAMI Research Group, Department of Computer and Information Science, Macau, Macau
4. School of Computer Science and Information Engineering, Hefei University of Technology, Hefei, China