Fig. 5

(a) True colour composite of the drone hyperspectral imagery acquired at different heights: 20 m, 25 m, 30 m, and 40 m, (b) endmember spectra of cabbage and soil from the drone flown at the height of 20 m, and (c) endmember spectra of cabbage and soil acquired from the drone flown at 40 m height.