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An Optimized Framework for Plane-Probing Algorithms

Jacques-Olivier Lachaud 1 Jocelyn Meyron 2 Tristan Roussillon 2
2 Origami - Origami
LIRIS - Laboratoire d'InfoRmatique en Image et Systèmes d'information
Abstract : A plane-probing algorithm computes the normal vector of a digital plane from a starting point and a predicate "Is a point x in the digital plane?". This predicate is used to probe the digital plane as locally as possible and decide on-the-fly the next points to consider. However, several existing plane-probing algorithms return the correct normal vector only for some specific starting points and an approximation otherwise, e.g. the Hand R-algorithm proposed in Lachaud et al. (J. Math. Imaging Vis., 59, 1, 23-39, 2017). In this paper, we present a general framework for these plane-probing algorithms that provides a way of retrieving the correct normal vector from any starting point, while keeping their main features. There are O(ω log ω) calls to the predicate in the worst-case scenario, where ω is the thickness of the underlying digital plane, but far fewer calls are experimentally observed on average. In the context of digital surface analysis, the resulting algorithm is expected to be of great interest for normal estimation and shape reconstruction.
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Submitted on : Wednesday, June 24, 2020 - 11:36:04 AM
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Jacques-Olivier Lachaud, Jocelyn Meyron, Tristan Roussillon. An Optimized Framework for Plane-Probing Algorithms. Journal of Mathematical Imaging and Vision, Springer Verlag, In press, ⟨10.1007/s10851-020-00965-6⟩. ⟨hal-02879784⟩

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