Non-destructive pre-symptomatic detection of gray mold infection in kiwifruit using hyperspectral data and chemometrics

Table 5 The prediction results of kiwifruit firmness values by PLSR and SVR models using Savitzky–Golay 1^st derivative spectral data and different wavelength selections

Prediction model	Wavelength selection	\({R}_{Cal}^{2}\)	\({RMSE}_{Cal}\)	\({R}_{CV}^{2}\)	\({RMSE}_{CV}\)
PLSR	None	0.9691	0.3739	0.9363	0.6940
	CARS	0.9879	0.2761	0.9723	0.4211
	SPA	0.9164	0.7266	0.8595	0.9416
	UVE	0.8985	0.8038	0.8709	0.9109
SVR	None	0.9532	0.4318	0.9105	0.7687
	CARS	0.9698	0.3723	0.9616	0.4868
	SPA	0.9171	0.7245	0.8753	0.8852
	UVE	0.9218	0.7009	0.8583	0.8947

ISSN: 1746-4811