Multi-Chart Geometry Images (MCGIMs)

1
Multi-Chart Geometry Images (MCGIMs) efficient
representation of 3D geometry as a regular, 2D
array reduces distortion better than mapping to
a single square

chartified orig. mesh MCGIM (400x160) remesh, PSNR71.7dB

(a) Domain boundary samples in black and cut-node samples in pink (b) Before zipperingsurface cut-path in red

(c) Boundary samples snapped tothe cut-paths (d) Boundary samples unified to form watertight mesh
Illustration of the zippering process. Zippering removes cracks between charts whose boundaries are sampled differently in the MCGIM domain. Illustration of the zippering process. Zippering removes cracks between charts whose boundaries are sampled differently in the MCGIM domain.
MCGIM example, generated completely automatically
areas of comparison detailed below, PSNR pair
refers to geometric, normal vector error
PSNR 73.4, 19.4
PSNR 68.0, 17.6
Single-Chart Gims. Notice areas of high
distortion due to mapping from a single square.
PSNR 84.6, 30.8
PSNR 79.5, 28.7
Multi-Chart Gims. Samples are evenly distributed
over the surface to reduce error.