ep-premc-mincmorph ep-premc-mincmorph smoothens masks using mincmorph. Typically, this is done as a preprocessing step to create a volume suitable for marching-cubes. This program does the same thing as: https://github.com/aces/surface-extraction/blob/7c9c5987a2f8f5fdeb8d3fd15f2f9b636401d9a1/scripts/marching_cubes.pl.in#L166-L184