1. Department of Electronic Engineering, Shantou University, Guangdong, 515063, China Key Lab of Digital Signal and Image Processing of Guangdong Province, Guangdong, China
2. Department of Electronic Engineering, Shantou University, Guangdong, 515063, China
3. College of Computer Science and Technology, Nanjing University of Aeronautics and Astronautics, Jiangsu, 210016, China
4. School of Mathematics and Statistics, Xi'an Jiaotong University, Shan'xi, 710049, China
5. Department of Mathematics, Shantou University, Guangdong, 515063, China
6. Department of Computer Science, City University of Hong Kong, Hong Kong, China
7. BEACON Center for the Study of Evolution in Action, Michigan State University, East Lansing, Michigan, USA