Table 3.

Spectral variables and chlorophyll content retrieval accuracies for the different models (ASD data).

Feature	Model	No. of Wavelengths	Calibration		Validation
			RMSEc	R2	RMSEc	R2
spectral reflectance	LR	1	0.665	0.20	0.527	0.57
	MLR	3	0.510	0.53	0.380	0.77
	MLR	7	0.408	0.70	0.348	0.80
	PLSR	520	0.364	0.76	0.364	0.78
	SVR	3	0.464	0.61	0.405	0.74
	SVR	7	0.403	0.71	0.405	0.72
	SVR	520	0.399	0.74	0.412	0.71
derivative spectral reflectance	LR	1	0.581	0.39	0.424	0.72
	MLR	3	0.477	0.59	0.413	0.76
	MLR	7	0.365	0.76	0.378	0.78
	PLSR	520	0.489	0.57	0.406	0.72
	SVR	3	0.344	0.79	0.463	0.73
	SVR	7	0.380	0.75	0.411	0.77
	SVR	520	0.381	0.76	0.431	0.71