Table 2. Performance of PLS, SVM and BPNN models for predicting firmness and TSS.

			Calibration		Prediction
Parameter	Method	Spectra	SEC	r	SEP	r
Firmness(N)	PLS	VIS	0.518	0.91	0.451	0.93
		NIR	0.859	0.81	0.943	0.67
		Whole	0.504	0.91	0.421	0.94
	SVM	VIS	0.149	0.94	0.674	0.76
		NIR	1.523	0.78	0.794	0.72
		Whole	0.112	0.94	0.532	0.78
	BPNN	VIS	0.599	0.90	0.436	0.93
		NIR	0.677	0.87	0.713	0.87
		Whole	0.424	0.93	0.375	0.94
TSS (°Bx)	PLS	VIS	0.776	0.64	0.638	0.73
		NIR	0.783	0.55	0.795	0.67
		Whole	0.712	0.81	0.575	0.76
	SVM	VIS	0.756	0.67	0.784	0.60
		NIR	2.780	0.48	0.855	0.42
		Whole	0.361	0.92	0.775	0.62
	BPNN	VIS	0.721	0.59	0.656	0.78
		NIR	0.753	0.58	0.705	0.74
		Whole	0.506	0.76	0.573	0.83