Table 1 Shape-index ranges for each shape for 3D shape descriptors [24]
Shape | Shape-index range |
|---|---|
Spherical cup | -1 to -0.875 |
Trough | -0.875 to -0.625 |
Rut | -0.625 to -0.375 |
Saddle rut | -0.375 to -0.125 |
Saddle | -0.125 to 0.125 |
Saddle ridge | 0.125 to 0.375 |
Ridge | 0.375 to 0.625 |
Dome | 0.625 to 0.875 |
Spherical cap | 0.875 to 1 |