Table 2 Selected features with descriptions
Feature category | Features of early recurrence vs. non-early recurrence | |
|---|---|---|
Texture features | GLCM | X45.7DifferenceEntropy |
X135.7Dissimilarity | ||
X0.1InformationMeasureCorr1 | ||
X90.7InformationMeasureCorr2 | ||
X45.7InverseVariance | ||
GLRCM | X90HighGrayLevelRunEmpha | |
Shape features | Compactness1 | |
Mass | ||
Orientation | ||
Roundness | ||
Intensity histogram features | Intensity Histogram | Kurtosis |
Notes: GLCM, Gray-level co-occurrence matrix; and GLRLM, Gray-level run-length matrix. GLCM features have been constructed by four directions (θ = 0°, 45°, 90°, and 135°) and three offsets (d = 1, 4, 7); and GLRLM features have been constructed by two directions (θ = 0°, 90°) and one offset (d = 1). | ||