1. College of Computer and Information Technology, China Three Gorges University, Yichang, China
2. Hubei Key Laboratory of Intelligent Vision Based Monitoring for Hydroelectric Engineering, China Three Gorges University, Yichang, China
3. Department of Computer Science, Zhejiang University of Technology, Hangzhou, China
4. School of Information and Safety Engineering, Zhongnan University of Economics and Law, Wuhan, China