Table 5.

PLS-DA classification results obtained using different spectral pretreatment methods.

Pretreatment	Latent Factors	Prediction (%)
		Total	Guizhou	Hainan
Raw	9	97.30	90.91	100.00
SG(9)	9	97.30	90.91	100.00
1D + SG(9)	8	100.00	100.00	100.00
2D + SG(9)	4	100.00	100.00	100.00
MSC	13	91.89	81.82	96.15
SNV	12	91.89	72.73	100.00