1 Australian Centre for Field Robotics (ACFR), Faculty of Engineering, The University of Sydney, Sydney, NSW, Australia.
2 Information Technology Group, Wagenigen University & Research, Wageningen, Netherlands.
3 College of Engineering, China Agricultural University, Beijing, China.
4 Key Laboratory of Smart Agriculture System Integration, Ministry of Education, China Agricultural University, Beijing, China.
5 Key Laboratory of Agriculture Information Acquisition Technology, Ministry of Agriculture and Rural Affairs of China, China Agricultural University, Beijing, China.
6 College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling, Shaanxi, China.