Fig. 6.

Distribution of feature bands of different pre-processed spectral reflectance with the three featured band screening methods. R raw reflectance, RLR the reciprocal logarithm of reflectance, FDRL first-order differential of the reciprocal logarithm of reflectance, SDRL second-order differential of the reciprocal logarithm of reflectance, CARS competitive adaptive reweighted sampling, LASSO least absolute shrinkage and selection operator, UVE uninformative variable elimination. For each panel, the number of selected feature bands was shown