Table 2.

Definition of top texture features.

Feature name	Definition
Mean deviation	Mean of the absolute deviation of the pixel intensity around the mean
Local binary pattern matrix (LBM)	Bins of binary pattern distributions around a pixel from local binary pattern of matrix calculations
Run length non-uniformity (RLN)	Measures the similarity of gray level runs in a determined degree direction. A gray level run is a set of consecutive, collinear pixels having the same gray level. The RLN is low if the run lengths are alike
Gray level non-uniformity (GLNU)	Total non-uniformity of pixel intensities throughout the region of interest. It measures the similarity of gray level intensity values in the image. The GLNU is low if the intensity values are alike
Short run emphasis	This metric increases when gray level short runs are predominant
Kurtosis	Measure of peakedness of pixel distribution
Size zone variability	Variability found in gray level size zone matrix generated from image
Cluster tendency	Measure of tendency of data to form non-random clusters
Inverse variance	Inverse of the measure of distribution around the mean