original Figure 1: Partial reconstructions from a progressive encoding of the dinosaur model. File sizes are given in bytes, errors in multiples of 10 −4 and PSNR in dB. The right most model is the original which has 14K vertices (model courtesy of Cyberware). Normal meshes were recently introduced as a new way to represent geometry. A normal mesh is a multiresolution representation which has the property that all details lie in a known normal direction and hence the mesh depends only on a single scalar per vertex. Such meshes are ideally suited for progressive compression. We demonstrate such a compression algorithm for normal meshes representing complex, arbitrary topology surfaces as they appear in 3D scanning and scientific visualization. The resulting coder is shown to exhibit gains of an additional 2-5dB over the previous state of the art. 1
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