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Issue No. 03 - May/June (2010 vol. 16)
ISSN: 1077-2626
pp: 484-498
Miloš Šrámek , Austrian Academy of Sciences, Vienna
Pavol Novotný , IBL Software Engineering, Mierova and Comenius University, Bratislava
Leonid I. Dimitrov , Austrian Academy of Sciences, Vienna
ABSTRACT
This paper presents a new method for voxelization of solid objects containing sharp details. Voxelization is a sampling process that transforms a continuously defined object into a discrete one represented as a voxel field. The voxel field can be used for rendering or other purposes, which often involve a reconstruction of a continuous approximation of the original object. Objects to be voxelized need to fulfill certain representability conditions; otherwise, disturbing artifacts appear during reconstruction. The method proposed here extends the traditional distance-based voxelization by an a-priori detection of sharp object details and their subsequent modification in such a way that the resulting object to be voxelized fulfills the representability conditions. The resulting discrete objects are represented by means of truncated (i.e., narrow-band) distance fields, which provide reduction of memory requirements and further processing by level set techniques. This approach is exemplified by two classes of solid objects that normally contain such sharp details: implicit solids and solids resulting from CSG operations. In both cases, the sharp details are rounded to a specific curvature dictated by the sampling distance.
INDEX TERMS
Voxelization, truncated distance fields, run-length compression, CSG operations, sharp details, implicit solids, artifacts, representability.
CITATION
Miloš Šrámek, Pavol Novotný, Leonid I. Dimitrov, "Enhanced Voxelization and Representation of Objects with Sharp Details in Truncated Distance Fields", IEEE Transactions on Visualization & Computer Graphics, vol. 16, no. , pp. 484-498, May/June 2010, doi:10.1109/TVCG.2009.74
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