1. College of Computer Sciences, Guangdong Polytechnic Normal University, Guangzhou, China
2. National Center for International Collaboration Research on Precision Agricultural Aviation Pesticide Spraying Technology, Guangzhou, China
3. College of Electronic Engineering, South China Agricultural University, Guangzhou, China
4. College of Engineering, South China Agricultural University, Guangzhou, China
5. Engineering Fundamental Teaching and Training Center, South China Agricultural University, Guangzhou, China