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Alias-free voxelization of geometric objects

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2 Author(s)
Sramek, M. ; Inst. of Meas. Sci., Slovak Acad. of Sci., Bratislava, Slovakia ; Kaufman, A.E.

Introduces a new concept for alias-free voxelization of geometric objects based on a voxelization model (V-model). The V-model of an object is its representation in 3D continuous space by a trivariate density function. This function is sampled during the voxelization and the resulting values are stored in a volume buffer. This concept enables us to study general issues of sampling and rendering separately from object-specific design issues. It provides us with a possibility to design such V-models, which are correct from the point of view of both the sampling and rendering, thus leading to both alias-free volumetric representation and alias-free rendered images. We performed numerous experiments with different combinations of V-models and reconstruction techniques. We have shown that the V-model with a Gaussian surface density profile combined with tricubic interpolation and Gabor derivative reconstruction outperforms the previously published technique with a linear density profile. This enables higher fidelity of images rendered from volume data due to increased sharpness of edges and thinner surface patches

Published in:

Visualization and Computer Graphics, IEEE Transactions on  (Volume:5 ,  Issue: 3 )

Date of Publication:

Jul-Sep 1999

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