1. School of Automation, China University of Geosciences, Wuhan, China
2. Department of Computer Science, China University of Geosciences, Wuhan, China
3. Hubei Key Laboratory of Intelligent Geo-Information Processing, China University of Geosciences, Wuhan, China
4. Department of Mechanical and Electronic Information, China University of Geosciences, Wuhan, China
5. Department of Electrical and Information Engineering, Wuhan Institute of Technology, Wuhan, China