FIGURE 6.

Distinction between cultivars obtained by hyperspectral imaging of leaves sampled at a presymptomatic stage (4 dpi) of a Cercospora leaf spot disease. Comparison of the normalized relative reflectance spectra between non-infected and infected plants, the profiles differ only marginally from one another (A,C,E). The mapping of the spectral information onto one dimension resulting from a multi-model LDA depicts the distribution of pixels belonging to “non-infected” or “infected”: the less the extent of overlap, the more well-separated are the groups (B,D,F).