EIKONAL-BASED MODELS OF RANDOM TESSELLATIONS

Authors

  • Bruno Figliuzzi Centre for Mathematical Morphology, Mines ParisTech - PSL Research University, Fontainebleau, 77300

DOI:

https://doi.org/10.5566/ias.2061

Keywords:

Eikonal equation, Fast marching algorithm, Stochastic geometry, Voronoi tessellations,

Abstract

In this article, we propose a novel, efficient method for computing a random tessellation from its vectorial representation at each voxel of a discretized domain. This method is based upon the resolution of the Eikonal equation and has a complexity in O(N log N), N being the number of voxels used to discretize the domain. By contrast, evaluating the implicit functions of the vectorial representation at each voxel location has a complexity of O(N²) in the general case. The method also enables us to consider the generation of tessellations with rough interfaces between cells by simulating the growth of the germs on a domain where the velocity varies locally. This aspect constitutes the main contribution of the article. A final contribution is the development of an algorithm for estimating the multi-scale tortuosity of the boundaries of the tessellation cells. The algorithm computes the tortuosity of the boundary at several scales by iteratively deforming the boundary until it becomes a straight line. Using this algorithm, we demonstrate that depending on the local velocity model, it is possible to control the roughness amplitude of the cells boundaries.

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Published

2019-04-11

How to Cite

Figliuzzi, B. (2019). EIKONAL-BASED MODELS OF RANDOM TESSELLATIONS. Image Analysis and Stereology, 38(1), 15–23. https://doi.org/10.5566/ias.2061

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Section

Original Research Paper

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