DGtal

Jan 1, 2010
Go to Project Site website GitHub
digital geometry digital topology digital convexity arithmetic 2D 3D nD discrete calculus discrete geometric estimator image analysis geometry processing reconstruction
Jacques-Olivier Lachaud
Jacques-Olivier Lachaud
Professor of Computer Science

My research interests include digital geometry, geometry processing, image analysis, variational models and discrete calculus.

Publications

Digital Surface Regularization by Normal Vector Field Alignment
Digital objects and digital surfaces are isothetic structures per se. Such surfaces are thus not adapted to direct visualization with …
D. Coeurjolly, P. Gueth, Jacques-Olivier Lachaud
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Digital Surface Regularization by Normal Vector Field Alignment
Heat Kernel Laplace-Beltrami Operator on Digital Surfaces
Many problems in image analysis, digital processing and shape optimization can be expressed as variational problems involving the …
T. Caissard, D. Coeurjolly, Jacques-Olivier Lachaud, T. Roussillon
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Heat Kernel Laplace-Beltrami Operator on Digital Surfaces
Robust and Convergent Curvature and Normal Estimators with Digital Integral Invariants
We present, in details, a generic tool to estimate differential geometric quantities on digital shapes, which are subsets of …
Jacques-Olivier Lachaud, D. Coeurjolly, J. Levallois
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Robust and Convergent Curvature and Normal Estimators with Digital Integral Invariants
Voronoi-Based Geometry Estimator for 3D Digital Surfaces
We propose a robust estimator of geometric quantities such as normals, curvature directions and sharp features for 3D digital surfaces. …
L. Cuel, Jacques-Olivier Lachaud, B. Thibert
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Voronoi-Based Geometry Estimator for 3D Digital Surfaces
Two efficient algorithms for computing the characteristics of a subsegment of a digital straight line
We address the problem of computing the exact characteristics of any subsegment of a Digital Straight Line (DSL) with known …
Jacques-Olivier Lachaud, M. Said
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Two efficient algorithms for computing the characteristics of a subsegment of a digital straight line
Multigrid Convergence of Discrete Geometric Estimators
The analysis of digital shapes requires tools to determine accurately their geometric characteristics. Their boundary is by essence …
D. Coeurjolly, Jacques-Olivier Lachaud, T. Roussillon
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Multigrid Convergence of Discrete Geometric Estimators
Fast, Accurate and Convergent Tangent Estimation on Digital Contours
This paper presents a new tangent estimator to digitized curves based on digital line recognition. It outperforms existing ones on …
Jacques-Olivier Lachaud, A. Vialard, F. de Vieilleville
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Fast, Accurate and Convergent Tangent Estimation on Digital Contours

Events

Tutorial on digital geometry at DGMM2024
Introduction to digital geometry
Apr 15, 2024 11:00 AM — 12:00 PM Florence, Italy
David Coeurjolly, Jacques-Olivier Lachaud
Project Slides (PDF) Slides (keynote) DGtal
Tutorial on digital geometry at DGMM2024
DGtal tutorial at DGMM2022
A tutorial on the DGtal library with several practicals.
Oct 24, 2022 9:30 AM — 12:30 PM Strasbourg, France
David Coeurjolly, Bertrand Kerautret, Jacques-Olivier Lachaud, Tristan Roussillon
Code Project PDF (part 1) PDF (part 2)
DGtal tutorial at DGMM2022
Graduate School on Digital Geometry
A graduate school on digital geometry for the geometry processing community.
Jul 11, 2021 1:30 PM — 3:00 PM Toronto, Ontario (virtual)
David Coeurjolly, Jacques-Olivier Lachaud
Code Project Video Slides (PDF) Slides (Keynote)
Graduate School on Digital Geometry
Digital Geometry in Pattern Recognition: Extracting Geometric Features with DGtal and Applications
A tutorial on digital geometry and its applications to pattern recognition
Nov 25, 2019 2:45 PM — Nov 26, 2019 6:00 PM Auckland, New Zealand
Bertrand Kerautret, Jacques-Olivier Lachaud
Project Website GitHub PDF (part 1) PDF (part 2)
Digital Geometry in Pattern Recognition: Extracting Geometric Features with DGtal and Applications
A tutorial for DGtal library (2012)
A gentle introduction to DGtal and its main features
Jun 1, 2012 12:00 AM — 12:00 AM
David Coeurjolly, Bertrand Kerautret, Jacques-Olivier Lachaud, Tristan Roussillon
Project Website
A tutorial for DGtal library (2012)
A tutorial for DGtal library (2011)
A gentle introduction to DGtal and its main features
Sep 1, 2011 12:00 AM — 12:00 AM
David Coeurjolly, Guillaume Damiand, Bertrand Kerautret, Jacques-Olivier Lachaud, Tristan Roussillon
Project Website
A tutorial for DGtal library (2011)