Navel Orange Maturity Classification by Multispectral Indexes Based on Hyperspectral Diffuse Transmittance Imaging

Table 2

The statistical analysis of the five indexes.

	Calibration set (mean ± SD)				Prediction set (mean ± SD)
	Immature	Midmature	Mature		Immature	Midmature	Mature
	0.139 ± 0.242	0.144 ± 0.023	0.084 ± 0.097	0.000	0.139 ± 0.020	0.124 ± 0.051	0.097 ± 0.081	0.040
	0.054 ± 0.054	0.116 ± 0.093	0.256 ± 0.225	0.000	0.039 ± 0.035	0.196 ± 0.142	0.218 ± 0.201	0.003
	0.884 ± 0.115	0.731 ± 0.217	0.446 ± 0.422	0.000	0.912 ± 0.092	0.540 ± 0.329	0.539 ± 0.384	0.002
	0.066 ± 0.074	0.175 ± 0.161	0.536 ± 0.613	0.000	0.049 ± 0.057	0.364 ± 0.325	0.420 ± 0.518	0.012
	11.04 ± 10.32	0.115 ± 0.024	0.058 ± 0.118	0.000	11.79 ± 9.34	0.100 ± 0.038	0.056 ± 0.011	0.000