Fig. 8

Accessible covering radius transform. Color indicates the accessible covering radius transform value, with lighter colors indicating higher covering radii. Each row shows one of the four datasets, while each column shows a different method of seeding the aCRT, corresponding to a different notion of accessibility. Notice that nearly all internal cavities in the DA/ZC dataset are completely inaccessible from the lumen, and the internal regions of both the DA/SE and AFEX datasets are considerably less accessible to the lumen than they are from the boundary