NDLI: Removing excess topology from isosurfaces

Content Provider	ACM Digital Library
Author	Hoppe, Hugues Desbrun, Mathieu Wood, Zoë Schröder, Peter
Copyright Year	2004
Abstract	Many high-resolution surfaces are created through isosurface extraction from volumetric representations, obtained by 3D photography, CT, or MRI. Noise inherent in the acquisition process can lead to geometrical and $\textit{topological}$ errors. Reducing geometrical errors during reconstruction is well studied. However, isosurfaces often contain many topological errors in the form of tiny handles. These nearly invisible artifacts hinder subsequent operations like mesh simplification, remeshing, and parametrization. In this article we present a practical method for removing handles in an isosurface. Our algorithm makes an axis-aligned sweep through the volume to locate handles, compute their sizes, and selectively remove them. The algorithm is designed to facilitate out-of-core execution. It finds the handles by incrementally constructing and analyzing a Reeb graph. The size of a handle is measured by a short nonseparating cycle. Handles are removed robustly by modifying the volume rather than attempting "mesh surgery." Finally, the volumetric modifications are spatially localized to preserve geometrical detail. We demonstrate topology simplification on several complex models, and show its benefits for subsequent surface processing.
Starting Page	190
Ending Page	208
Page Count	19
File Format	PDF
ISSN	07300301
e-ISSN	15577368
DOI	10.1145/990002.990007
Volume Number	23
Issue Number	2
Journal	ACM Transactions on Graphics (TOG)
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2004-04-01
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Topological artifacts Genus reduction Marching cubes Surface reconstruction
Content Type	Text
Resource Type	Article
Subject	Computer Graphics and Computer-Aided Design

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