1. College of computer and technology, BeiHua University, Jilin, 132021, Jilin, China
2. Institute of Digital Images Processing, BeiHua University, Jilin, 132011, Jilin, China
3. Department of Electronics and Information Engineering, Yili Normal University, Yining, 835000, China
4. School of Information Engineering, Dalian University, Dalian 116622, China
5. School of Automatic and Electronic Information, Sichuan University of Science and Engineering, Zigong 643000, China