Multi-Chart Geometry Images

Author Info

P. V. Sander, Harvard University
Z. J. Wood, CaltechFollow
S. J. Gortler, Harvard University
H. Hoppe, Microsoft Research

Recommended Citation

Postprint version. Published in Symposium on Geometry Processing Proceedings: Aachen, Germany, June 23, 2003.

NOTE: At the time of publication, the author Zoë Wood was not yet affiliated with Cal Poly.

Abstract

We introduce multi-chart geometry images, a new representation for arbitrary surfaces. It is created by resampling a surface onto a regular 2D grid. Whereas the original scheme of Gu et al. maps the entire surface onto a single square, we use an atlas construction to map the surface piecewise onto charts of arbitrary shape. We demonstrate that this added flexibility reduces parametrization distortion and thus provides greater geometric fidelity, particularly for shapes with long extremities, high genus, or disconnected components. Traditional atlas constructions suffer from discontinuous reconstruction across chart boundaries, which in our context create unacceptable surface cracks. Our solution is a novel zippering algorithm that creates a watertight surface. In addition, we present a new atlas chartification scheme based on clustering optimization.

Disciplines

Computer Sciences

Copyright

2003 European Association for Computer Graphics.

Number of Pages

10