Abstract
Two of the most effective methods for interpolating scattered data are the multiquadric method and the thin plate spline method. A negative aspect of these radial basis methods is that they are not local and they are computationally expensive and unstable if there are a large number of data points. We present a localized interpolation method that involves partitioning the data into arbitrary overlapping triangular regions based on arbitrary points, forming local radial basis interpolants to the data in each region, and then blending the local interpolants with rational triangle patches so that the resulting function is a locally defined C 1 interpolant. When the triangular regions form a triangulation of the scattered data locations, the resulting interpolant can be considered as a new local triangle patch method that generally has effective derivatives at the vertices and cross-boundary derivatives along the edges of the triangulation.
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Foley, T.A., Dayanand, S., Zeckzer, D. (1995). Localized Radial Basis Methods Using Rational Triangle Patches. In: Hagen, H., Farin, G., Noltemeier, H. (eds) Geometric Modelling. Computing Supplement, vol 10. Springer, Vienna. https://doi.org/10.1007/978-3-7091-7584-2_11
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DOI: https://doi.org/10.1007/978-3-7091-7584-2_11
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