1. Key Laboratory of Land Environment and Disaster Monitoring, Ministry of Natural Resources, China University of Mining and Technology, Xuzhou, China
2. Laboratoire d'Informatique Signal et Image de la Côte d'Opale, Université du Littoral Côte d'Opale, Calais, France
3. School of Environment Science and Spatial Informatics, China University of Mining and Technology, Xuzhou, China