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Alexandra Bac

51
Documents

Présentation

Publications

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

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

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

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

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

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

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

Measuring Holes of 3D Meshes

Yann-Situ Gazull , Aldo Gonzalez-Lorenzo , Alexandra Bac
GTMG, Mar 2021, Distanciel, France
Communication dans un congrès hal-03650377v1

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

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

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

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

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

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

The use of terrestrial LiDAR for enhanced forest inventory

Richard A Fournier , Jean-François Côté , Joris Ravaglia , Ulysse Rémillard , Olivier Martin-Ducup
Earth Observation Summit, 2017, Montréal, Canada
Communication dans un congrès hal-02080481v1

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
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
Image document

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
Image document

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

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
Image document

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

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
35th gOcad Meeting, 2015, Nancy, France
Communication dans un congrès hal-01341016v1
Image document

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

Computation of tree volume from terrestrial LiDAR data

Jules Morel , Alexandra Bac , Cédric Vega
SILVILASER, Sep 2015, La Grande Motte, France. pp.308--310
Communication dans un congrès hal-01381791v1

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
Image document

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

Forest carbon assessment from LiDAR 3D point cloud analysis

Alexandra Bac , Jules Morel , Cédric Vega
RFCC - Regional Forum on Climate Change, Jul 2015, Bandkok, Thailand
Communication dans un congrès hal-01381790v1
Image document

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
Image document

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
Image document

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

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

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

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

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

Alexandra Bac , Jean-Luc Mari , Dimitri Kudelski , van Tran Nam , Sophie Viseur
Discrete Curvature - Theory and Applications, a colloquium on discrete curvature, Nov 2013, Marseille, France
Communication dans un congrès hal-01311433v1
Image document

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

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

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

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

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
Image document

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 hal-01488865v1