Table 1 Correlation between image feature values and moisture content.

parameter	Y	R	G	B	H	S	V	a^*	b^*	L^*
R	0.709^**	1	0.866^**	0.591^**	−0.286	−0.158	0.987^**	0.104	−0.080	0.939^**
G	0.856^**	0.866^**	1	0.141	0.186	0.336	0.807^**	−0.402	0.411	0.984^**
B	−0.051	0.591^**	0.141	1	−0.690^**	−0.884^**	0.696^**	0.836^**	−0.843^**	0.310
H	0.350	−0.286	0.186	−0.690^**	1	0.756^**	−0.314	−0.827^**	0.755^**	0.037
S	0.490^*	−0.158	0.336	−0.884^**	0.756^**	1	−0.284	−0.988^**	0.996^**	0.168
V	0.641^**	0.987^**	0.807^**	0.696^**	−0.314	−0.284	1	0.215	−0.206	0.897^**
a^*	−0.560^**	0.104	−0.402	0.836^**	−0.827^**	−0.988^**	0.215	1	−0.993^**	−0.236
b^*	0.559^**	−0.080	0.411	−0.843^**	0.755^**	0.996^**	−0.206	−0.993^**	1	0.247
L^*	0.860^**	0.939^**	0.984^**	0.310	0.037	0.168	0.897^**	−0.236	0.247	1
m	0.641^**	0.987^**	0.807^**	0.696^**	−0.314	−0.284	1.000^**	0.215	−0.206	0.897^**
δ	0.676^**	0.177	0.620^**	−0.656^**	0.697^**	0.917^**	0.057	−0.929^**	0.937^**	0.478^*
r	0.619^**	0.063	0.532^**	−0.744^**	0.737^**	0.960^**	−0.060	−0.965^**	0.972^**	0.378
μ₃	0.246	0.495^*	0.416^*	0.068	−0.414^*	0.115	0.389	−0.028	0.128	0.431^*
U	−0.840^**	−0.517^*	−0.859^**	0.322	−0.553^**	−0.712^**	−0.424^*	0.763^**	−0.763^**	−0.765^**
e	0.837^**	0.423^*	0.806^**	−0.421^*	0.631^**	0.783^**	0.325	−0.829^**	0.827^**	0.695^**

Note: ^**Correlation is significant at the 0.01 level, ^*Correlation is significant at the 0.05 level.

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