Least-Squares Fitting of Algebraic Spline Surfaces |
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Authors: | Jttler Bert Felis Alf |
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Institution: | (1) Johannes Kepler University, Altenberger Str. 69, 4040 Linz, Austria;(2) ProSTEP GmbH, Dolivostr. 11, 64293 Darmstadt, Germany |
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Abstract: | We present an algorithm for fitting implicitly defined algebraic spline surfaces to given scattered data. By simultaneously approximating points and associated normal vectors, we obtain a method which is computationally simple, as the result is obtained by solving a system of linear equations. In addition, the result is geometrically invariant, as no artificial normalization is introduced. The potential applications of the algorithm include the reconstruction of free-form surfaces in reverse engineering. The paper also addresses the generation of exact error bounds, directly from the coefficients of the implicit representation. |
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Keywords: | algebraic surface spline surface surface fitting least-squares fitting reverse engineering |
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