Adaptive Smooth Scattered-data Approximation for Large-scale Terrain Visualization

Bertram, Martin; Tricoche, Xavier; Hagen, Hans

Adaptive Smooth Scattered-data Approximation for Large-scale Terrain Visualization

Files

177-184.pdf (3.58 MB)

Date

2003

Authors

Bertram, Martin
Tricoche, Xavier
Hagen, Hans

Publisher

The Eurographics Association

Abstract

We present a fast method that adaptively approximates large-scale functional scattered data sets with hierarchical B-splines. The scheme is memory efficient, easy to implement and produces smooth surfaces. It combines adaptive clustering based on quadtrees with piecewise polynomial least squares approximations. The resulting surface components are locally approximated by a smooth B-spline surface obtained by knot removal. Residuals are computed with respect to this surface approximation, determining the clusters that need to be recursively refined, in order to satisfy a prescribed error bound. We provide numerical results for two terrain data sets, demonstrating that our algorithm works efficiently and accurate for large data sets with highly non-uniform sampling densities.

        @inproceedings{10.2312:VisSym/VisSym03/177-184
,
booktitle = {Eurographics / IEEE VGTC Symposium on Visualization
},
editor = {G.-P. Bonneau and S. Hahmann and C. D. Hansen
},
title = {{Adaptive Smooth Scattered-data Approximation for Large-scale Terrain Visualization
}},
author = {Bertram, Martin and 
Tricoche, Xavier and 
Hagen, Hans
},
year = {2003
},
publisher = {The Eurographics Association
},
ISSN = {1727-5296
},
ISBN = {3-905673-01-0
},
DOI = {10.2312/VisSym/VisSym03/177-184
}
}