Table 1.
Complete list (names and abbreviations) of the first-order, GLCM and GLDM features considered in this study. For each class, the features are listed in column-wise alphabetical order.
| First-Order Features | ||
| Entropy (Entropy) | Inter-quartile range (IQR) | Kurtosis |
| Mean absolute deviation (MAD) | Maximum (Max) | Mean (Mean) |
| Median | Minimum (Min) | Range |
| Robust mean absolute deviation (RMAD) | Standard deviation (Std) | Skewness |
| Uniformity | ||
| Features from Grey-Level Co-Occurrence Matrix (GLCM) | ||
| Autocorrelation (Acorr) | Cluster shade (ClShade) | Cluster prominence (ClProm) |
| Cluster tendency (ClTen) | Contrast (Contr) | Correlation (Corr) |
| Difference average (DiffAvg) | Difference entropy (DiffEnt) | Difference variance (DiffVar) |
| Joint average (JointAvg) | Joint energy (JointEnergy) | Joint entropy (JointEntropy) |
| Informational measure of correlation ‘1’ (IMC1) | Informational measure of correlation ‘2’ (IMC2) | Inverse difference (ID) |
| Inverse difference moment (IDM) | Inverse difference moment normalised (IDMN) | Inverse difference normalised (IDN) |
| Inverse variance (InvVar) | Maximal correlation coefficient (MCC) | Maximum probability (MaxProb) |
| Sum average (SumAvg) | Sum entropy (SumEnt) | Sum of squares (SumSquares) |
| Features from Grey-Level Difference Matrix (GLDM) | ||
| Dependence entropy (DE) | Dependence non-uniformity (DN) | Dependence non-uniformity normalised (DNN) |
| Dependence variance (DV) | Grey-level non-uniformity (GLN) | Grey-level variance (GLV) |
| High grey-level emphasis (HGLE) | Large dependence emphasis (LDE) | Large dependence high grey-level emphasis (LDHGLE) |
| Large dependence low grey-level emphasis (LDLGLE) | Low grey-level emphasis (LGLE) | Small dependence high grey-level emphasis (SDHGLE) |
| Small dependence low grey-level emphasis (SDLGLE) | Small dependence emphasis (SDE) | |