Table 1 Parameters used for descriptor computation and number of features extracted from their outputs – N/A – not applicable

Gray-level histogram

N/A

4

GLCM

directions={0,45,90,135}

22

distance = 1px

GLRL

directions={0,45,90,135}

11

Wavelets

#levels=2

28

type=Daubechies4

Gabor filters

#scales=3

48

#orientations=4

LBP

R=8

58

block size= size of ROI

TOTAL=171