This paper proposes a unified and consistent set of flexible tools to approximate important geometric attributes, including normal vectors and curvatures on arbitrary triangle meshes. We present a consistent derivation of these first and second order differential properties using averaging Voronoi cells and the mixed Finite-Element/Finite-Volume method, and compare them to existing formulations. Building upon previous work in discrete geometry, these operators are closely related to the continuous case, guaranteeing an appropriate extension from the continuous to the discrete setting: they respect most intrinsic properties of the continuous differential operators. We show that these estimates are optimal in accuracy under mild smoothness conditions, and demonstrate their numerical quality. We also present applications of these operators, such as mesh smoothing, enhancement, and quality checking, and show results of denoising in higher dimensions, such as for tensor images.
- Gaussian Curvature
- Voronoi Cell
- Triangle Mesh
- Discrete Operator
- Voronoi Region
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Meyer, M., Desbrun, M., Schröder, P., Barr, A.H. (2003). Discrete Differential-Geometry Operators for Triangulated 2-Manifolds. In: Hege, HC., Polthier, K. (eds) Visualization and Mathematics III. Mathematics and Visualization. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-05105-4_2
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-05682-6
Online ISBN: 978-3-662-05105-4
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