Please see (T.X.Le, 2019) for more details.
Test with wet glass beads: (a) original image; (b) image obtained after the classification of voxels – solid-only (black), air-only (white), water-only (red), air/solid (blue), water/solid (yellow), air/water (green). Image dimensions: 2.000 mm x 2.000 mm.
Ex. Glass-fibers reinforced composites