Feature type

Feature Number

Description

Texture [34] [35]

1 - 96

(96 features)

Uniformity/Energy/Angular Second Moment, Contrast/Inertia, Correlation, Homogeneity/Inverse difference moment are the various texture features computed along 0, 45, 90, and 135 degrees and distance 1, 2, 4, 8, 16 and 32.

Intensity histogram features [36]

97 - 105

(9 features)

Mean, smoothness, standard deviation, skewness, uniformity, kurtosis, average histogram, modified standard deviation, modified skewness of mass region are the various intensity histogram features.

Shape features [37] [38]

106 - 116

(11 Features)

Various shape features are area, perimeter, axis of least inertia, eccentricity, circularity ratio, ellipse variance, rectangularity, distance mean, distance standard deviation, centre of gravity X, and centre of gravity Y

Radial Distance Features [39]

117 - 123

(7 features)

Useful information to identify mass margin are Radial Distance Mean, Radial Distance Standard Deviation, Mass Circularity, Entropy, Area Ratio, Zero Crossing Count, Mass Boundary Roughness based on the radial distance signal.