grid_spline_4-Multilevel_B-Spline_Interpolation

Multilevel B-Spline Interpolation

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contributed at 2018-11-06

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Multilevel B-spline algorithm for spatial interpolation of scattered data as proposed by Lee, Wolberg and Shin (1997).The algorithm makes use of a coarse-to-fine hierarchy of control lattices to generate a sequence of bicubic B-spline functions, whose sum approaches the desired interpolation function. Large performance gains are realized by using B-spline refinement to reduce the sum of these functions into one equivalent B-spline function.The 'Maximum Level' determines the maximum size of the final B-spline matrix and increases exponential with each level. Where level=10 requires about 1mb level=12 needs about 16mb and level=14 about 256mb(!) of additional memory.

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SAGA (2018). grid_spline_4-Multilevel_B-Spline_Interpolation, Model Item, OpenGMS, https://geomodeling.njnu.edu.cn/modelItem/df754438-9e27-4b21-8280-fae5c14622ee
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contributed at 2018-11-06

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