Table 1. Summary of TFs and FOS features.
| Order | Matrix | Features |
|---|---|---|
| FOS | Histogram | Variance (VAR) |
| Median (MED) | ||
| Coefficient of variation (COV) | ||
| Skewness (SKE) | ||
| Kurtosis (KUR) | ||
| Energy (ENEF) | ||
| Entropy (ENTF) | ||
| Lesion_mean (LSM) | ||
| Lung_mean (LUM) | ||
| Liver_mean (LVM) | ||
| Lesion_max (LSX) | ||
| Lung_max (LUX) | ||
| Liver_max (LVX) | ||
| Lesion_peak (LSP) | ||
| Second-order features | GLCM | Autocorrelation (AUC) |
| Contrast (CONG) | ||
| Correlation (COR) | ||
| Cluster shade (CS) | ||
| Dissimilarity (DIS) | ||
| Energy (ENG) | ||
| Entropy (ENTG) | ||
| Inverse difference (ID) | ||
| Homogeneity (HM) | ||
| Maximum probability (MP) | ||
| Sum of squares (SOS) | ||
| Sum average (SA) | ||
| Sum variance (SV) | ||
| Sum entropy (SE) | ||
| Difference variance (DV) | ||
| Difference entropy (DE) | ||
| Information measure of correlation (IMC) | ||
| Inverse difference normalized (IDN) | ||
| Inverse difference moment normalized (IDMN) | ||
| Diagonal moment (DM) | ||
| Second diagonal moment (SDN) | ||
| High-order features | GLRLM | Short-run emphasis (SRE) |
| Long-run emphasis (LRE) | ||
| Low grey-level run emphasis (LGRE) | ||
| High grey-level run emphasis (HGRE) | ||
| Short-run low grey-level emphasis (SRLGE) | ||
| Short-run high grey-level emphasis (SRHGE) | ||
| Long-run low grey-level emphasis (LRLGE) | ||
| Long-run high grey-level emphasis (LRHGE) | ||
| Grey-level non-uniformity for run (GLNr) | ||
| Run-length non-uniformity (RLN) | ||
| Run percentage (RP) | ||
| GLSZM | Short-zone emphasis (SZE) | |
| Long-zone emphasis (LZE) | ||
| Low grey-level zone emphasis (LGZE) | ||
| High grey-level zone emphasis (HGZE) | ||
| Short-zone low grey-level emphasis (SZLGE) | ||
| Short-zone high grey-level emphasis (SZHGE) | ||
| Long-zone low grey-level emphasis (LZLGE) | ||
| Long-zone high grey-level emphasis (LZHGE) |
||
| Grey-level non-uniformity for zone (GLNz) | ||
| Zone-length non-uniformity (ZLN) | ||
| Zone percentage (ZP) | ||
| NGLDM | Small number emphasis (SNE) | |
| Large number emphasis (LNE) | ||
| Number nonuniformity (NN) | ||
| Second moment (SM) | ||
| Entropy (ENTN) | ||
| NGTDM | Coarseness (COA) | |
| Contrast (CONN) | ||
| Busyness (BUSN) | ||
| Complexity (COMP) | ||
| Texture strength (TS) |
TF, texture feature; FOS, first-order statistics; GLCM, gray-level co-occurrence matrix; GLRLM, gray-level run length matrix; GLSZM, gray-level size zone matrix; NGLDM, neighboring gray-level dependence matrix; NGTDM, neighbor gray-tone difference matrix.