Early phytopathological intervention in high-density CEA facilities prevents catastrophic yield loss. Edge computer vision using HSV color-space segmentation and convolutional feature extraction identifies *Botrytis cinerea* gray mold and interveinal chlorosis days before visible macroscopic necrosis occurs.
1. Hue-Saturation-Value (HSV) Lesion Extraction
H \in [10^\circ, 35^\circ], \quad S \ge 0.35, \quad V \le 0.70 \implies \text{Necrotic Lesion Mask}