Figure 6
From: Hyperspectral imaging for small-scale analysis of symptoms caused by different sugar beet diseases
Spatial and temporal dynamics in hyperspectral signature of Cercospora leaf spot during pathogenesis. RGB images of infected sugar beet tissue (first row); region of interest (ROI) for the extraction of characteristic spectral signatures for the classes healthy tissue (light green), leaf spot 1 (light green) 3 (blue), 7 (yellow) and 11 (red) days after appearance, respectively (second row); Spectral Angle Mapper (SAM) classification based on spectral signatures from ROIs (third row); spectral signatures for each class (last row).