Figure 2
From: Estimating and evaluating the rice cluster distribution uniformity with UAV-based images

Rice cluster recognition and location labeling process. (a): UAV image; (b): Image afer binarization, denosing and expansion; (c): Image afer preliminary marking seedling positon, the blue diamond indicates the larger component within the > 85th quantile and the red dots indicate the initially labeled seedling positions; (d): Image of fine labeled seedling position, the red and blue dots denote the preliminary and detailed labeled seedling positions, respectively.