1. School of Electronic Engineering and Automation, Guilin University of Electronic Technology, Guangxi, People's Republic of China
2. Guangxi Key Laboratory of Manufacturing System & Advanced Manufacturing Technology, School of Mechanical and Electrical Engineering, Guilin University of Electronic Technology, Guangxi, People's Republic of China
3. Center for Geospatial Information, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Beijing, People's Republic of China