August 2000

BACK

Sub-voxel Medial Axis traces

Early results: April to June 2000

Breakthrough: by combining wave propagation on a discrete grid with local geometric computations of bisectors, I have achieved my first sub-voxel tracing of 3D shocks. Many refinements are now possible.


Samples (in yellow) of a cube togehter with Blue and White medial sheet sub-voxel traces.
Samples of the shock curves at voxel locations shown in green.

Computed sub-voxel trace of medial sheets (white and blue nodes) and curves (green).

Original scan.

Frontal view.

Side view.

by Frederic Leymarie

PhD candidate

Brown University

3D Medial Axis for Sherds

Seminar of Wednesday, August 16

Abstract

I will present a wave propagation algorithm for computing medial axis surfaces, curves and nodes from 3D samples of surfaces, e.g. as obtained when scaning pottery sherds.

Joint work with Prof. Kimia.

Original scan.

Frontal view.

Computed sub-voxel trace of medial sheets (white and blue nodes) and curves (green). In yellow are shown the samples of the original scan.

BACK

Last Updated: Sept. 1, 2000

F.F.Leymarie