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Bandwidth Selection and Reconstruction Quality in Point-Based Surfaces

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3 Author(s)
Hao Wang ; Sci. Comput. & Imaging (SCI) Inst., Univ. of Utah, Salt Lake City, UT ; Scheidegger, C.E. ; Silva, C.T.

We investigate the influence of bandwidth selection in the reconstruction quality of point-based surfaces. While the problem has received relatively little attention in the literature, we show that appropriate selection plays a significant role in the quality of reconstructed surfaces. We show how to compute optimal bandwidths for one class of moving least-squares surfaces by formulating the polynomial fitting step as a kernel regression problem for both noiseless and noisy data. In the context of Levin's projection, we also discuss the implications of the two-step projection for bandwidth selection. We show experimental comparisons of our method, which outperforms heuristically chosen functions and weights previously proposed. We also show the influence of bandwidth on the reconstruction quality of different formulations of point-based surfaces. We provide, to the best of our knowledge, the first quantitative comparisons between different MLS surface formulations and their optimal bandwidths. Using these experiments, we investigate the choice of effective bandwidths for these alternative formulations. We conclude with a discussion of how to effectively compare the different MLS formulations in the literature.

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Visualization and Computer Graphics, IEEE Transactions on  (Volume:15 ,  Issue: 4 )