Qualitative Discrimination of Intact Tobacco Leaves Based on Near-Infrared Technology

Table 2

Accuracy of the DPLS model using different preprocessing methods (independent spectra).

Preprocessing method	Position-GV discrimination model		Grade discrimination model
	Training set	Validation set	Training set	Validation set
None	92.98	90.75	85.76	80.37
1st derivative	98.31	94.22	91.27	84.46
SNV	100.00	94.22	89.39	82.33
1st derivative + SNV	100.00	96.22	90.51	86.25