Rosenfeld and Weszka RW75

Corner strength. Averaged $k$-cosine of the angle between the $k$-vectors is used, which is defined as

$$\overline{c}_{ik} = \begin{cases} \frac{2}{k+2}\sum\limits_... ...t=(k-1)/2}^{k}c_{it} & \text{if $k$\space is odd}, \end{cases}$$

where $c_{it}$ are given by (3).
Selection procedure. Same as in RJ73, but for $\overline{c}_{ik}$.
Parameter. Same as in RJ73, with the same default $\kappa = 0.05$.