Last update: August 31, 2002

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3D Shape Representation based on Shocks

Frederic F. Leymarie and Benjamin B. Kimia

David dataset

Input

Dataset graciously shared by the Stanford Graphics group, USA.

Part of the Digital Michelangelo Project - Archive of 3D Models (head of Michelangelo's David).

Input

Dataset: 31043 pts.

 

Recovered Surface

The "surface scaffold" (i.e., the less significant part of the shock scaffold) gives us back a meshing of the input data. Thus, we can re-build connectivity on the input samples automatically.

Surface Mesh

 

Recovered "Internal" Medial Axis description

Internal MA (3 views)

Recovered "External" Medial Axis description

NB: Medial structure around neck and contributing sources as blue and fuchsia spheres.

Same as above, but viewed from the back of the face (i.e., "inside" David's head).

View from the back, with only surface points identified in relationship to the longest
"ridge-like" shock curve of the "external" scaffold (long blue curve in previous 2 figures).
Blue spheres represent input points directly associated to the links of that shock curve.
Fuchsia spheres are input data "carried over" during the recovery of the surface mesh,
which is performed by pruning those shock curves "closest" to the surface data.

 

Animation

 

F.F.Leymarie

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