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A geometrically motivated parametric model in manifold estimation
Authors:José R Berrendero  Alejandro Cholaquidis  Ricardo Fraiman
Institution:1. Departamento de Matemáticas, Universidad Autónoma de Madrid, Madrid, Spain;2. Centro de Matemática, Universidad de la República, Montevideo, Uruguay;3. Departamento de Matemática, Universidad de San Andrés, Buenos Aires, Argentina
Abstract:The general aim of manifold estimation is reconstructing, by statistical methods, an m-dimensional compact manifold S on /></span><sup><i>d</i></sup> (with <i>m</i>≤<i>d</i>) or estimating some relevant quantities related to the geometric properties of <i>S</i>. Focussing on the cases <i>d</i>=2 and <i>d</i>=3, with <i>m</i>=d or <i>m</i>=<i>d</i>?1, we will assume that the data are given by the distances to <i>S</i> from points randomly chosen on a band surrounding <i>S</i>. The aim of this paper is to show that, if <i>S</i> belongs to a wide class of compact sets (which we call <i>sets with polynomial volume</i>), the proposed statistical model leads to a relatively simple parametric formulation. In this setup, standard methodologies (method of moments, maximum likelihood) can be used to estimate some interesting geometric parameters, including curvatures and Euler characteristic. We will particularly focus on the estimation of the (<i>d</i>?1)-dimensional boundary measure (in Minkowski's sense) of <i>S</i>. It turns out, however, that the estimation problem is not straightforward since the standard estimators show a remarkably pathological behaviour: while they are consistent and asymptotically normal, their expectations are infinite. The theoretical and practical consequences of this fact are discussed in some detail.</td> </tr> <tr> <td align=
Keywords:estimation of boundary length  estimation of curvature  distance to boundary  volume function  remote sensing
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