Alexandra Bac

57
Documents

Présentation

Publications

31
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10
9
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Publications

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Generating 3D Anisotropic Centroidal Voronoi Tessellations

Alexandre Marin , Alexandra Bac , Laurent Astart

International Journal of Mathematical, Computational, Statistical, Natural and Physical Engineering, 2024, 18 (9)

Article dans une revue hal-04706922v2
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A constructive approach of alexander duality

Aldo Gonzalez-Lorenzo , Alexandra Bac , Yann-Situ Gazull

Journal of Applied and Computational Topology, 2024, 9 (1), pp.2. ⟨10.1007/s41468-024-00198-1⟩

Article dans une revue hal-05003653v1
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Computing Geometrical Measures of Topological Holes

Yann-Situ Gazull , Alexandra Bac , Aldo Gonzalez-Lorenzo

Computer-Aided Design, 2023, 163, pp.103563. ⟨10.1016/j.cad.2023.103563⟩

Article dans une revue hal-04322031v1

Segmentation of unbalanced and in-homogeneous point clouds and its application to 3D scanned trees

Jules Morel , Alexandra Bac , Takashi Kanai

The Visual Computer, 2020

Article dans une revue hal-03418434v1
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Comparison of Three Algorithms to Estimate Tree Stem Diameter from Terrestrial Laser Scanner Data

Joris Ravaglia , Richard A Fournier , Alexandra Bac , Cédric Véga , Jean-François Côté et al.

Forests, 2019, 10 (7), pp.599. ⟨10.3390/f10070599⟩

Article dans une revue hal-03325416v1

Surface reconstruction of incomplete datasets: A novel Poisson surface approach based on CSRBF

Jules Morel , Alexandra Bac , Cedric Vega

Computers and Graphics, 2018, 74, pp.44-55. ⟨10.1016/j.cag.2018.05.004⟩

Article dans une revue hal-02109646v1

Terrain model reconstruction from terrestrial LiDAR data using radial basis functions

Jules Morel , Alexandra Bac , Cédric Vega

IEEE Computer Graphics and Applications, 2017, 37 (5), pp.72-84. ⟨10.1109/MCG.2017.3621225⟩

Article dans une revue hal-01380160v1

Allowing cycles in discrete Morse theory

Aldo Gonzalez-Lorenzo , Alexandra Bac , Jean-Luc Mari , Pedro Real

Topology and its Applications, 2017, 228, pp.1-35. ⟨10.1016/j.topol.2017.05.008⟩

Article dans une revue hal-01528103v1

Extraction of tubular shapes from dense point clouds and application to tree reconstruction from laser scanned data

Joris Ravaglia , Alexandra Bac , Richard A Fournier

Computers and Graphics, 2017, 66, pp.23-33. ⟨10.1016/j.cag.2017.05.016⟩

Article dans une revue hal-01685214v1

Searching combinatorial optimality using graph-based homology information

Pedro Real , Helena Molina-Abril , Aldo Gonzalez-Lorenzo , Alexandra Bac , Jean-Luc Mari

Applicable Algebra in Engineering, Communication and Computing, 2015, 26 (1-2), pp. 103-120. ⟨10.1007/s00200-014-0248-x⟩

Article dans une revue hal-01285969v1

3D modeling and segmentation with discrete curvatures

Alexandra Bac , Marc Daniel , Jean-Louis Maltret

Journal of Medical Informatics and Technology, 2005, 9, pp.13--24

Article dans une revue hal-01288298v1

Un modèle relationnel de la logique linéaire du second ordre

Alexandra Bac

Notes aux Comptes-Rendus de l'Académie des Sciences, 2001, 334 (2)

Article dans une revue hal-01380172v1
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Characterization of the Computed Homology and Cohomology Bases

Yann-Situ Gazull , Aldo Gonzalez-Lorenzo , Alexandra Bac

Discrete Geometry and Mathematical Morphology, Michael H. F. Wilkinson, Jiří Kosinka, Nov 2025, Groningen, Netherlands. pp.163-177, ⟨10.1007/978-3-032-09544-2_12⟩

Communication dans un congrès hal-05357027v1

A New Data Structure For Handling Efficiently Polyhedral Complexes

Alexandre Marin , Wassim Ahmed-Belkacem , Alexandra Bac , Laurent Astart

RING Meeting, Jun 2022, Nancy, France

Communication dans un congrès hal-03650376v1

A Heuristic for Short Homology Basis of Digital Objects

Aldo Gonzalez-Lorenzo , Alexandra Bac , Jean-Luc Mari

International Joint Conference on Discrete Geometry and Mathematical Morphology (DGMM), 2022, Strasbourg, France. pp.60-70, ⟨10.1007/978-3-031-19897-7_6⟩

Communication dans un congrès hal-03953372v1
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Measuring Holes of 3D Meshes

Yann-Situ Gazull , Aldo Gonzalez-Lorenzo , Alexandra Bac

Groupe de Travail en Modélisation Géométrique (GTMG), Mar 2021, Online, France

Communication dans un congrès hal-03650377v1

High Accuracy Terrain Reconstruction from Point Clouds Using Implicit Deformable Model

Jules Morel , Alexandra Bac , Takashi Kanai

ICCS, Jun 2020, Amsterdam, Netherlands

Communication dans un congrès hal-03418436v1

Digital Terrain Model From UAV Photogrammetric Data

Jules Morel , Alexandra Bac , Takashi Kanai

Smart Tools and Applications in Graphics (STAG), Nov 2020, Firenze, Italy

Communication dans un congrès hal-03418438v1

Surface reconstruction of incomplete datasets: a novel Poisson surface approach based on CSRBF

Jules Morel , Alexandra Bac , Cedric Vega

Paper presented at the Shape Modelling International (SMI 2018) Symposium, Instituto Superior Técnico, University of Lisbon, Jun 2018, Lisbo, Portugal

Communication dans un congrès hal-02902826v1

The use of terrestrial LiDAR for enhanced forest inventory

Richard A Fournier , Jean-François Côté , Joris Ravaglia , Ulysse Rémillard , Olivier Martin-Ducup et al.

Earth Observation Summit, 2017, Montréal, Canada

Communication dans un congrès hal-02080481v1

Opening Holes in Discrete Objects with Digital Homotopy

Aldo Gonzalez-Lorenzo , Alexandra Bac , Jean-Luc Mari

20th IAPR International Conference on Discrete Geometry for Computer Imagery (DGCI 2017), Sep 2017, Vienne, Austria. pp.213--224, ⟨10.1007/978-3-319-66272-5_18⟩

Communication dans un congrès hal-01698847v1

Extraction of tubular shapes from dense point clouds and application to tree reconstruction from laser scanned data

Joris Ravaglia , Alexandra Bac , Richard A Fournier

Shape Modeling International, Jun 2017, Berkeley, United States

Communication dans un congrès hal-01685231v1

Anisotropic Octrees: a Tool for Fast Normals Estimation on Unorganized Point Clouds

Joris Ravaglia , Alexandra Bac , Richard A Fournier

WSCG, May 2017, Plzen, Czech Republic

Communication dans un congrès hal-01690397v1
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Two Measures for the Homology Groups of Binary Volumes

Aldo Gonzalez-Lorenzo , Alexandra Bac , Jean-Luc Mari , Pedro Real

19th IAPR International Conference on Discrete Geometry for Computer Imagery (DGCI 2016), Apr 2016, Nantes, France. pp.154-165, ⟨10.1007/978-3-319-32360-2_12⟩

Communication dans un congrès hal-01341015v1

Two new measures for the homology groups of discrete objects

Aldo Gonzalez-Lorenzo , Alexandra Bac , Jean-Luc Mari , Pedro Real

Journées du Groupement de Recherche "Informatique Mathématique" (GdR IM), 2016, Villetaneuse, France

Communication dans un congrès hal-01381805v1

Topological Comparisons of Fluvial Reservoir Rock Volumes Using Betti Numbers: Application to CO2 Storage Uncertainty Analysis

Asmae Dahrabou , Sophie Viseur , Aldo Gonzalez-Lorenzo , Jeremy Rohmer , Alexandra Bac et al.

6th International Workshop on Computational Topology in Image Context (CTIC 2016), Jun 2016, Marseille, France. pp.101-112, ⟨10.1007/978-3-319-39441-1_10⟩

Communication dans un congrès hal-01341013v1
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Mesures géométriques pour les groupes d’homologie : vers une adaptation aux complexes simpliciaux

Aldo Gonzalez-Lorenzo , Alexandra Bac , Jean-Luc Mari , Pedro Real

Journées du Groupe de Travail en Modélisation géométrique (GTMG 2016), Mar 2016, Dijon, France. pp.12-15

Communication dans un congrès hal-01476541v1

Importing cooperative pedagogy into postgraduate courses - an experiment

Alexandra Bac , Alexis Ben-Miloud , Axel Rozo-Brezillac

Future Of Education - FOE, Jun 2016, Florence, Italy

Communication dans un congrès hal-01380181v1
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Fast, Simple and Separable Computation of Betti Numbers on Three-dimensional Cubical Complexes

Aldo Gonzalez-Lorenzo , Mateusz Juda , Alexandra Bac , Jean-Luc Mari , Pedro Real

6th International Workshop on Computational Topology in Image Context (CTIC 2016), Jun 2016, Marseille, France. pp.130-139, ⟨10.1007/978-3-319-39441-1_12⟩

Communication dans un congrès hal-01341014v1

Homological Discrete Vector Fields and homotopy equivalence

Aldo Gonzalez Lorenzo , Alexandra Bac , Jean-Luc Mari , Pedro Real

Applications of Computer Algebra (ACA 2015), 2015, Kalamata, Greece

Communication dans un congrès hal-01499699v1
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Tree stem reconstruction from terrestrial laser scanner point cloud using Hough transform and open active contours

Joris A Ravaglia , Alexandra Bac , Richard A Fournier

Silvilaser 2015, Sep 2015, La Grande Motte, France

Communication dans un congrès hal-01376470v1

Fast computation of Betti numbers on three-dimensional cubical complexes

Aldo Gonzalez-Lorenzo , Alexandra Bac , Jean-Luc Mari , Pedro Real

Applications of Computer Algebra (ACA 2015), 2015, Kalamata, Greece

Communication dans un congrès hal-01341017v1

Computation of tree volume from terrestrial LiDAR data

Jules Morel , Alexandra Bac , Cédric Vega

MMT, Dec 2015, Sydney, Australia. pp.53--59

Communication dans un congrès hal-01381812v1

Topological comparisons of fluvial reservoir rock volumes using Betti numbers: application to CO2 storage uncertainty analysis

Asmae Dahrabou , Sophie Viseur , Aldo Gonzalez-Lorenzo , Jean-Luc Mari , Alexandra Bac et al.

35th gOcad Meeting, 2015, Nancy, France

Communication dans un congrès hal-01341016v1

Computation of tree volume from terrestrial LiDAR data

Jules Morel , Alexandra Bac , Cédric Vega

SilviLaser 2015, Sep 2015, La Grande Motte, France. pp.308--310

Communication dans un congrès hal-01381791v1
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Cellular Skeletons: a New Approach to Topological Skeletons with Geometric Features

Aldo Gonzalez-Lorenzo , Alexandra Bac , Jean-Luc Mari , Pedro Real

16th International Conference on Computer Analysis of Images and Patterns (CAIP 2015), Sep 2015, La Valette, Malta. pp.616-627, ⟨10.1007/978-3-319-23117-4_53⟩

Communication dans un congrès hal-01341037v1

Forest carbon assessment from LiDAR 3D point cloud analysis

Alexandra Bac , Jules Morel , Cédric Vega

RFCC - Regional Forum on Climate Change, Jul 2015, Bangkok, Thailand

Communication dans un congrès hal-01381790v1
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Modélisation de tiges d'arbres à partir de contours actifs

Joris Ravaglia , Alexandra Bac , Richard A Fournier

GTMG 2015, Apr 2015, Poitiers, France

Communication dans un congrès hal-01376474v1

Triangulation of an elevation surface structured by a sparse 3D grid

Van-Sinh Nguyen , Alexandra Bac , Marc Daniel

The Fifth IEEE International Conference on Communications and Electronics IEEE ICCE 2014, 2014, DaNang, Vietnam. pp.464-469

Communication dans un congrès hal-01311428v1
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Computing Homological Information Based on Directed Graphs within Discrete Objects

Aldo Gonzalez-Lorenzo , Alexandra Bac , Jean-Luc Mari , Pedro Real

16th International Symposium on Symbolic and Numeric Algorithms for Scientific Computing (SYNASC 2014), Sep 2014, Timisoara, Romania. pp.571--578, ⟨10.1109/SYNASC.2014.82⟩

Communication dans un congrès hal-01381797v1

Spatial vegetation density index from terrestrial laser scanner : a continuous approach applied to forestry

Alexandra Bac , Joris Ravaglia , Richard A Fournier

IGARSS, Jul 2014, Québec, Canada

Communication dans un congrès hal-01381800v1
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Segmentation de nuages de points par octrees et analyse en composantes principales

Joris Ravaglia , Alexandra Bac , Richard A Fournier

GTMG 2014, Mar 2014, Lyon, France

Communication dans un congrès hal-01376473v1
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Laser-scanned tree stem filtering for forest inventories measurements

Joris Ravaglia , Alexandra Bac , Alexandre Piboule

Digital Heritage, Oct 2013, Marseille, France. pp.649 - 652, ⟨10.1109/DigitalHeritage.2013.6743809⟩

Communication dans un congrès hal-01376465v1

Application of discrete curvatures to surface mesh simplification and feature line extraction

Alexandra Bac , Jean-Luc Mari , Dimitri Kudelski , van Tran Nam , Sophie Viseur et al.

Discrete Curvature - Theory and Applications, a colloquium on discrete curvature, Nov 2013, Marseille, France

Communication dans un congrès hal-01311433v1

Simplification of 3D point clouds sampled from elevation surfaces

Van-Sinh Nguyen , Alexandra Bac , Marc Daniel

21th International Conference on Computer Graphics, Visualization and Computer Vision, WSCG2013, 2013, Plenz, Czech Republic. pp.60-69

Communication dans un congrès hal-01311430v1

Boundary Extraction and Simplification of a Surface Defined by a Sparse 3D Volume

Van-Sinh Nguyen , Alexandra Bac , Marc Daniel

Proceeding of the third international symposium on information and communication technology SoICT 2012, 2012, Ha Long, Vietnam. pp.115-124

Communication dans un congrès hal-01311438v1

Surface Improvement for Reservoir Modelling

Alexandra Bac , Marc Daniel , Rainaud J.F. , van Tran Nam

MAMERN 2009, 2009, Unknown, Unknown Region. pp.163--167

Communication dans un congrès hal-01311451v1

A multistep approach to restoration of locally undersampled meshes

Alexandra Bac , van Tran Nam , Marc Daniel

GMP, Apr 2008, Langzhou, China

Communication dans un congrès hal-01381807v1

A hybrid simplification algorithm for triangular meshes

Alexandra Bac , van Tran Nam , Marc Daniel

GraphiCon'2007, 2007, Moscou, Unknown Region. pp.17--24

Communication dans un congrès hal-01311455v1

Une méthode hybride de simplification de maillages triangulaires

van Tran Nam , Alexandra Bac , Marc Daniel

GTMG 2006, 2006, Unknown, Région indéterminée

Communication dans un congrès hal-01311383v1

Controlled Local Deformation of NURBS Surfaces to Satisfy Several Punctual Constraints

Raphaël La Greca , Marc Daniel , Alexandra Bac

Curves and Surfaces, 2006, Avignon, France

Communication dans un congrès hal-01311460v1

Traitement de surfaces géologiques pour la construction de modèles 3D

Alexandra Bac , van Tran Nam , Marc Daniel , Michel Perrin

GTMG 2005, 2005, Unknown, Région indéterminée

Communication dans un congrès hal-01311385v1
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Spatial vegetation density index from terrestrial laser scanner

Joris Ravaglia , Alexandra Bac , Richard A Fournier

IEEE Geoscience and Remote Sensing Society (IGARSS), Jul 2014, Québec, Canada

Poster de conférence hal-01376468v1

Individual surface representations and optimization

Alexandra Bac , Marc Daniel , van Tran Nam

Editions Technip. Shared Earth Modeling: Knowledge driven solutions for building and managing subsurface 3D geological models, pp.95-113, 2013

Chapitre d'ouvrage hal-01288312v1

A Multistep Approach to Restoration of Locally Undersampled Meshes

Alexandra Bac , van Tran Nam , Marc Daniel

F. Chen and B. Jüttler. Advances in Geometric Modeling and Applications, pp.272-289, 2008

Chapitre d'ouvrage hal-01288313v1

Local Deformation of NURBS Curves

Raphaël La Greca , Marc Daniel , Alexandra Bac

Nashboro Press. Mathematical Methods for Curves and Surfaces: Tromso 2004, 0--9728482-4-X, pp.243--252, 2005

Chapitre d'ouvrage hal-01288315v1

Satisfying Constraints Through Local Deformation of NURBS Curves

Raphaël La Greca , Marc Daniel , Alexandra Bac

[Rapport de recherche] LSIS.RR.2004.006, Laboratoire des Sciences de l\'Information et des Syst\èmes. 2004

Rapport (rapport de recherche) hal-01488865v1