1. College of Computer Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, China
2. Engineering Research Center of Forensic Science, Chongqing Education Committee, College of Criminal Investigation, Southwest University of Political Science and Law, Chongqing, China
3. Guangxi Key Laboratory of Image and Graphic Intelligent Processing, Guilin University of Electronic Technology, Guilin, China