Table 4.

Texture features extracted from CT scans.

Histogram based features	Co-occurrence matrix based Run-length features features
Mean	Energy	Long run emphasis
Skewness	Inertia difference	Run length non-uniformity
Deviation	Correlation	Low grey-level run emphasis
Variance	Average difference	Short run low grey-level emphasis
Kurtosis	Entropy difference	Long run low grey-level emphasis
	Inertia	Short run high grey-level emphasis
	Entropy	Long run high grey-level emphasis
	Average sum	Short run emphasis
		Run grey-level non-uniformity
		Run percentage