Figure 4. SAM-based plot segmentation and terrain sampling. (IMAGE)

Nanjing Agricultural University The Academy of Science

Figure 4. SAM-based plot segmentation and terrain sampling.

Caption

(A) Crop ranges detection based on vertical summation of vegetation pixels. Red triangles mark the midpoints of regions with minimal vegetation, corresponding to inter-row alleys. (B) Zoomed-in view of the area highlighted by the red rectangle in panel (A). Red triangles indicate peaks in accumulated vegetation, corresponding to crop rows. (C) Distribution of sampling points used for local terrain estimation. SAM-generated masks for individual rows are shown in pink and turquoise. Blue dash-dotted lines represent the detected crop rows. Green circles denote plot centroids used as prompts for SAM, and red circles indicate terrain sampling points.

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