Abstract:

We have developed a level set framework for editing closed
geometric models.
Level set models are deformable implicit surfaces where
the deformation of the surface is controlled
by a speed function in the level set partial differential equation.
In this chapter we define several speed functions that provide
a set of surface editing operators.
The speed functions
describe the velocity at each point on the evolving
surface in the direction of the surface normal.
All of the information needed to deform a surface
is encapsulated in the speed function, providing a
simple, unified computational framework.
The user combines pre-defined building blocks to create the
desired speed function.
The surface editing operators are quickly computed and
may be applied both regionally and globally.
The level set framework offers several
advantages: 1) By construction, self-intersection cannot occur,
which guarantees the generation of physically-realizable, simple, closed
surfaces. 2) Level set models easily change topological
genus, and 3) are free of the edge connectivity and mesh quality problems
associated with mesh models.
We present five examples of
surface editing operators: blending, smoothing, sharpening,
openings/closings and embossing. We demonstrate their effectiveness on
several scanned objects and scan-converted models.

Last modified on May 1, 2008.