G1 scattered data interpolation with minimized sum of squares of principal curvatures

Abstract

One of the main focus of scattered data interpolation is fitting a smooth surface to a set of non-uniformly distributed data points which extends to all positions in a prescribed domain. In this paper, given a set of scattered data V ={(xi, yi), i=1,...,n} ∈ R2 over a polygonal domain and a corresponding set of real numbers {Zi} i=1 n we wish to construct a surface S which has continuous varying tangent plane everywhere (G1) such that S(x iyi) = zi. Specifically, the polynomial being considered belong to G1 quartic Bézier functions over a triangulated domain. In order to construct the surface, we need to construct the triangular mesh spanning over the unorganized set of points, V which will then have to be covered with Bézier patches with coefficients satisfying the G1 continuity between patches and the minimized sum of squares of principal curvatures. Examples are also presented to show the effectiveness of our proposed method.