Table A1.

Definition of gray-level co-occurrence matrix (GLCM) descriptors.

Feature Group	Feature Id	Feature Description
GLCM	$f_5$	Auto-Correlation
	$f_6$	Contrast
	$f_7$	Correlation
	$f_8$	Prominence
	$f_9$	Shade
	$f_{10}$	Dissimilarity
	$f_{11}$	Energy
	$f_{12}$	Entropy
	$f_{13}$	Homogeneity
	$f_{14}$	Maximum Probability
	$f_{15}$	Variance
	$f_{16}$	Sum Average
	$f_{17}$	Sum Variance
	$f_{18}$	Sum Entropy
	$f_{19}$	Difference variance
	$f_{20}$	Difference Entropy
	$f_{21}$	Information measure I of correlation
	$f_{22}$	Information measure II of correlation
	$f_{23}$	Inverse Difference Normalized
	$f_{24}$	Inverse difference moment