Table 1.

Five GLCM features extracted from the samples.

Feature name	Mathematical equation
Contrast	$\sum _{i=0}^{m-1}\sum _{j=0}^{n-1}{\left(i-j\right)}^{2}f\left(i,j\right)$
Entropy	$-\sum _{i=0}^{m-1}\sum _{j=0}^{n-1}{\log }_{2}f\left(i,j\right)$
Energy	$\sqrt{\sum _{i=0}^{m-1}\sum _{j=0}^{n-1}{f}^2\left(i,j\right)}$
Correlation	$\frac{{\sum }_{i=0}^{m-1}{\sum }_{j=0}^{n-1}\left(i,j\right)f\left(i,j\right)-{\mu }_i{\mu }_j}{{\sigma }_i{\sigma }_j}$
Homogeneity	$\sum _{i=0}^{m-1}\sum _{j=0}^{n-1}\frac{1}{1+{\left(i-j\right)}^2}f\left(i,j\right)$