Multi-chart geometry images
Symposium on Geometry Processing 2003, 146-155.
Surface shape represented using an atlas of charts within a regular grid.
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.
There is probably room for improvement in the zippering process, which is
important for uniform texture sampling.