Fig. 3From: Comparison of two novel methods for counting wheat ears in the field with terrestrial LiDARSchematic diagrams of removing irrelevant points (a) and segmenting ear point clouds (b) using the Otsu method. Subplots (a) and (b) show the histogram distribution of the point cloud density and the normal vector difference of the two cultivars (V1 and V2), N fertilization rates (N0, the N1, and N2) and planting densities (D1 and D2) for wheat during the early-filling stageBack to article page