Feature group | Number of features | Description |
---|---|---|
Textural (1st-order) | 4 | Mean, Standard deviation, Kurtosis, Skewness |
 |  | Energy, contrast, correlation, variance, inverse difference moment normalized, |
Textural (2nd-order) | 72 | Sum average, sum variance, entropy, sum entropy, difference entropy, |
 | (18 in each of 4 directions) | Information measure of correlation, homogeneity, autocorrelation |
 |  | Difference variance, dissimilarity, cluster shade, cluster prominence, maximum probability |
Gabor filters | 12 | 3 scales and 4 orientations |
Kirsch filters | 8 | 8 directions |
Total | 96 | All features |