Table 1.
Details of spectral pre-treatments applied to each spectral region.
| Cell | Region | Pre-Treatments |
|---|---|---|
| 0.1 mm | W1 | FFT-filter, SavGol smoothing (25 SP, second polynomial order), SNV |
| W2 | FFT-filter, SavGol smoothing (25 SP, second polynomial order), SNV | |
| G1 | FFT-filter, SavGol smoothing (13 SP, second polynomial order), SNV, second SavGol derivative (15 SP, second polynomial order) | |
| G2 | FFT-filter, second SavGol derivative (11 SP, second polynomial order) | |
| 1 mm | W1 | SavGol smoothing (second polynomial order, 25 SP) |
| G1 | second SavGol derivative (19 SP, second polynomial order) | |
| G2 | second SavGol derivative (25 SP, second polynomial order) | |
| 2 mm | W1 | SavGol smoothing (25 SP, second polynomial order), SNV |
| G1 | second SavGol derivative (9 SP, second polynomial order) | |
| G2 | second SavGol derivative (7 SP, second polynomial order) |
SavGol—Savitzky-Golay; SP—smoothing points.