1. Faculty of Electrical Engineering and Computer Science, Ningbo University, Ningbo, China
2. Department of Geography and Spatial Information Techniques, Ningbo University, Ningbo, China
3. Hubei Key Laboratory of Applied Mathematics, Faculty of Mathematics and Statistics, Hubei University, Wuhan, China
4. Institute of Applied Remote Sensing and Information Technology, Key Laboratory of Agricultural Remote Sensing and Information System, Zhejiang University, Hangzhou, China
5. School of Geodesy and Geomatics, Wuhan University, Wuhan, China