APW: An ensemble model for efficient wheat spike counting in unmanned aerial vehicle images. - Zhaosheng Yao; Dingshun Zhang; Ting Tian; Muhammad Zain; Weijun Zhang; Tianle Yang; Xiaoxin Song; Shaolong Zhu; Tao Liu; Haijiao Ma; Chengming Sun (Comput. Electron. Agric., 2024)