Table 2.

The prediction results of TAA in validation set by the PLS models with full-spectrum.

Pretreatment	LV	r	RMSEP	Bias	Slope	Offset
Raw	6	0.879	0.751	−0.098	0.902	0.559
SG	6	0.868	0.790	−0.144	0.886	0.622
SNV	4	0.821	0.876	−0.026	0.783	1.432
MSC	4	0.814	0.893	−0.030	0.776	1.475
1-Der	6	0.823	0.866	0.031	0.769	1.582
2-Der	1	0.497	1.306	0.067	0.294	4.815
De-trending	6	0.875	0.759	−0.141	0.867	0.751
DOSC	1	0.835	0.909	−0.097	0.906	0.537