IAPR Third International Conference on Discrete Geometry and Mathematical Morphology
3D illustration of notations and concepts, from left to right: input convex shape
X, its digitization Xh := X∩hZd seen as a collection of cubes (visually equivalent to
the h-boundary ∂hX), its digitized convex hull Yh := CvxH (Xh), the h-boundary ∂hX
with the normals of the closest facet on Yh. The three left images are rendered with
material “normal”, i.e. the displayed color corresponds to the normal vector direction.
