Fig. 3

Example of a plant top (a) and side (c) views and their 3D point clouds recorded with the 3D cameras at top (b) and side (d) views. The point cloud surfaces reconstructed by Alpha shapes algorithm with the alpha parameters 0.2 (e) with a sectional view (f) and Ball Pivoting algorithm with the ball radius 5 cm (g) with a sectional view (h), and with the Vacuum package algorithm (i) with a sectional view (j)