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

Table 1 Results of PLSR models based on different pretreated spectral data

Target	Pretreatment	\({R}_{Cal}^{2}\)	\({RMSE}_{Cal}\)	\({R}_{CV}^{2}\)	\({RMSE}_{CV}\)
Firmness	None	0.9301	0.6650	0.8631	0.9402
	MWS	0.9336	0.6481	0.8916	0.8323
	MSC	0.9103	0.7531	0.8467	0.9953
	Savitzky–Golay 1st derivative	0.9448	0.5909	0.9023	0.7906
	Savitzky–Golay 2nd derivative	0.9226	0.6997	0.7469	1.2721
	SNV	0.9236	0.6950	0.8553	0.9673
SSC	None	0.7832	0.5836	0.6916	0.7028
	MWS	0.7182	0.6653	0.6455	0.7513
	MSC	0.8958	0.4046	0.7468	0.6368
	Savitzky–Golay 1st derivative	0.9127	0.3703	0.7523	0.6283
	Savitzky–Golay 2nd derivative	0.7317	0.6492	0.6180	0.7822
	SNV	0.8622	0.4652	0.7170	0.6736
TA	None	0.8197	0.0488	0.7329	0.0600
	MWS	0.8695	0.0415	0.7834	0.0540
	MSC	0.8446	0.0453	0.7400	0.0591
	Savitzky–Golay 1st derivative	0.9594	0.0232	0.7841	0.0539
	Savitzky–Golay 2nd derivative	0.8260	0.0480	0.5830	0.0750
	SNV	0.8211	0.0486	0.7321	0.0599

ISSN: 1746-4811