1. Key Laboratory of Forestry Intelligent Monitoring and Information Technology Research of Zhejiang Province, Zhejiang A & F University, Lin’an, 311300 Zhejiang, China
2. College of Information Engineering, Zhejiang A & F University, Lin’an, 311300 Zhejiang, China
3. Zhejiang Forest Resources Monitoring Center, Hangzhou, 310004 Zhejiang, China