Feature Descriptors

Formula

Style

L_linearity

$$\left({\lambda }_1-{\lambda }_2\right)/{\lambda }_1$$

Dimensional Feature

P_planarity

$$\left({\lambda }_2-{\lambda }_3\right)/{\lambda }_1$$

S_sphericity

$${\lambda }_3/{\lambda }_1$$

A_anisotropy

$$\left({\lambda }_1-{\lambda }_3\right)/{\lambda }_1$$

Statistical Feature

E_eigenentropy

$$-{\displaystyle {\sum }_{i=1}^3{\lambda }_i\ln \left({\lambda }_i\right)}$$

O_ominvariance

$${\left({\lambda }_1\cdot {\lambda }_2\cdot {\lambda }_3\right)}^{1/3}$$

S_{surface_variation}

$${\lambda }_3/\left({\lambda }_1+{\lambda }_2+{\lambda }_3\right)$$

V_verticality

$$1-\left|\langle \left[001\right],\overrightarrow{e_3}\rangle \right|$$