Julien Tierny

I am a senior researcher (DR2) with the CNRS, at the Computer Science Department (LIP6, APR team) of Sorbonne Universite. I am also a professor (PCC) at Ecole Polytechnique. My research focuses on Topological Data Analysis and Visualization.
I am the principal investigator of the project TORI (In-situ Topological Reduction of Scientific Data), awarded by the ERC.

>>> Full curriculum

News

· We have one open internship position (master2 level, with Ph.D. follow-up)!	[Dec. 10, 2024]
· We have one open internship position (master2 level, with Ph.D. follow-up)!	[Dec. 06, 2024]
· Our paper on Topological Simplification Optimization has been accepted to IEEE VIS!	[Aug. 21, 2024]
· Our paper on Localized Discrete Vector Field Construction has been accepted to IEEE VIS!	[Aug. 21, 2024]
· Our paper on Distributed Path Compression has been accepted to IEEE LDAV!	[Aug. 21, 2024]
· Our poster on Locally Turbulent Vortex Detection has been accepted to IEEE LDAV!	[Aug. 21, 2024]
· Our paper on MPI distributed computations in TTK has been accepted to IEEE TVCG!	[Apr. 6, 2024]

		A Practical Solver for Scalar Data Topological Simplification Mohamed Kissi, Mathieu Pont, Joshua A. Levine, Julien Tierny IEEE Transactions on Visualization and Computer Graphics Proc. of IEEE VIS 2024. Code - Replicability stamp
		Localized Evaluation for Constructing Discrete Vector Fields Tanner Finken, Julien Tierny, Joshua A. Levine IEEE Transactions on Visualization and Computer Graphics Proc. of IEEE VIS 2024.
		Wasserstein Auto-Encoders of Merge Trees (and Persistence Diagrams) Mathieu Pont and Julien Tierny IEEE Transactions on Visualization and Computer Graphics Accepted, to be presented at IEEE VIS 2024. Code - Replicability stamp
		Wasserstein Dictionaries of Persistence Diagrams Keanu Sisouk, Julie Delon, Julien Tierny IEEE Transactions on Visualization and Computer Graphics Accepted, to be presented at IEEE VIS 2024. Code - Replicability stamp
		TTK is Getting MPI-Ready Eve Le Guillou, Michael Will, Pierre Guillou, Jonas Lukasczyk, Pierre Fortin, Christoph Garth, Julien Tierny IEEE Transactions on Visualization and Computer Graphics Accepted, to be presented at IEEE VIS 2024. Code - Replicability stamp
		Distributed Path Compression for Piecewise Linear Morse-Smale Segmentations and Connected Components Michael Will, Jonas Lukasczyk, Julien Tierny, Christoph Garth Proc. of IEEE Symposium on Large Data Analysis and Visualization 2024.
		Identifying Locally Turbulent Vortices within Instabilities Fabien Vivodtzev, Florent Nauleau, Jean-Philippe Braeunig, Julien Tierny, Proc. of IEEE Symposium on Large Data Analysis and Visualization 2024 (poster).
		Principal Geodesic Analysis of Merge Trees (and Persistence Diagrams) Mathieu Pont, Jules Vidal, Julien Tierny IEEE Transactions on Visualization and Computer Graphics Accepted, to be presented at IEEE VIS 2023. Code - Data - Replicability stamp
		Discrete Morse Sandwich: Fast Computation of Persistence Diagrams for Scalar Data -- An Algorithm and A Benchmark Pierre Guillou, Jules Vidal, Julien Tierny IEEE Transactions on Visualization and Computer Graphics Accepted, to be presented at IEEE VIS 2023. Code - Benchmark - Replicability stamp
		Merge Tree Geodesics and Barycenters with Path Mappings Florian Wetzels, Mathieu Pont, Julien Tierny, Christoph Garth IEEE Transactions on Visualization and Computer Graphics Proc. of IEEE VIS 2023. Code
		Parallel Computation of Piecewise Linear Morse-Smale Segmentations Robin Maack, Jonas Lukasczyk, Julien Tierny, Hans Hagen, Ross Maciejewski, Christoph Garth IEEE Transactions on Visualization and Computer Graphics Accepted, to be presented at IEEE VIS 2023. Code - Replicability stamp
		Topological Data Analysis of Vortices in the Magnetically-Induced Current Density in LiH Molecule Malgorzata Olejniczak, Julien Tierny Physical Chemistry Chemical Physics Accepted, 2023.
		VESTEC: Visual Exploration and Sampling Toolkit for Extreme Computing Markus Flatken, Artur Podobas, Riccardo Fellegara, Achim Basermann, Johannes Holke, David Knapp, Max Kontak, Christian Krullikowski, Michael Nolde, Nick Brown, Rupert Nash, Gordon Gibb, Evgenij Belikov, Steven Wei Der Chien, Stefano Markidis, Pierre Guillou, Julien Tierny, Jules Vidal, Charles Gueunet, Johannes Günther, Miroslaw Pawlowski, Piero Poletti, Giorgio Guzzetta, Mattia Manica, Agnese Zardini, Jean-Pierre Chaboureau, Miguel Mendes, Adrián Cardil, Santiago Monedero, Joaquín Ramírez, Andreas Gerndt IEEE Access Accepted, 2023.
		A Hands-on TTK Tutorial for Absolute Beginners Christoph Garth, Robin Maack, Mathieu Pont, Julien Tierny, Bei Wang, Florian Wetzels, Michael Will IEEE VIS Tutorials 2023. Tutorial web page
		Topological Analysis of Ensembles of Hydrodynamic Turbulent Flows -- An Experimental Study Florent Nauleau, Fabien Vivodtzev, Thibault Bridel-Bertomeu, Heloise Beaugendre, Julien Tierny Proc. of IEEE Symposium on Large Data Analysis and Visualization 2022.
		Topological Analysis of Ensemble Scalar Data with TTK, A Sequel Christoph Garth, Charles Gueunet, Pierre Guillou, Federico Iuricich, Joshua Levine, Jonas Lukasczyk, Mathieu Pont, Julien Tierny, Jules Vidal, Bei Wang, Florian Wetzels IEEE VIS Tutorials 2022. Tutorial web page
		Wasserstein Distances, Geodesics and Barycenters of Merge Trees Mathieu Pont, Jules Vidal, Julie Delon, Julien Tierny IEEE Transactions on Visualization and Computer Graphics Proc. of IEEE VIS 2021. Talk video - Code - Data - Replicability stamp
		A Progressive Approach to Scalar Field Topology Jules Vidal, Pierre Guillou, Julien Tierny IEEE Transactions on Visualization and Computer Graphics Accepted, Presented at IEEE VIS 2021. Talk video - Code - Companion video - Replicability stamp
		Fast Approximation of Persistence Diagrams with Guarantees Jules Vidal and Julien Tierny Proc. of IEEE Symposium on Large Data Analysis and Visualization 2021. Talk video - Code and Data
		Topological Analysis of Ensemble Scalar Data with TTK Christoph Garth, Charles Gueunet, Pierre Guillou, Lutz Hofmann, Joshua A Levine, Jonas Lukasczyk, Julien Tierny, Jules Vidal, Bei Wang, Florian Wetzels IEEE VIS Tutorials 2021. Tutorial web page
		TopoMap: A 0-dimensional Homology Preserving Projection of High-Dimensional Data Harish Doraiswamy, Julien Tierny, Paulo J. S. Silva, Luis Gustavo Nonato, Claudio Silva IEEE Transactions on Visualization and Computer Graphics Proc. of IEEE VIS 2020.
		Localized Topological Simplification of Scalar Data Jonas Lukasczyk, Christoph Garth, Ross Maciejewski, Julien Tierny IEEE Transactions on Visualization and Computer Graphics Proc. of IEEE VIS 2020. Code
		Topological Data Analysis Made Easy with the Topology ToolKit, What is New? Martin Falk, Christoph Garth, Charles Gueunet, Pierre Guillou, Attila Gyulassy, Lutz Hofmann, Christopher Kappe, Joshua A Levine, Jonas Lukasczyk, Julien Tierny, Jules Vidal IEEE VIS Tutorials 2020. Tutorial web page
		Implementing Persistence-Based Clustering of Point Clouds in the Topology ToolKit Ryan Cotsakis, Jim Shaw, Julien Tierny, and Joshua A. Levine Upcoming TopoInVis book (accepted).
		Report of the TopoInVis TTK Hackathon: Experiences, Lessons Learned, and Perspectives Jonas Lukasczyk, Jakob Beran, Wito Engelke, Martin Falk, Anke Friederici, Christoph Garth, Lutz Hofmann, Ingrid Hotz, Petar Hristov, Wiebke Köpp, Talha Bin Masood, Małgorzata Olejniczak, Paul Rosen, Jan-Tobias Sohns, Tino Weinkauf, Kilian Werner, Julien Tierny Upcoming TopoInVis book (accepted).
		A Topological Data Analysis Perspective on Non-Covalent Interactions in Relativistic Calculations Małgorzata Olejniczak, André Severo Pereira Gomes, Julien Tierny, International Journal of Quantum Chemistry Code and data - Journal cover!
		Progressive Wasserstein Barycenters of Persistence Diagrams Jules Vidal, Joseph Budin, Julien Tierny IEEE Transactions on Visualization and Computer Graphics Proc. of IEEE VIS 2019. Best Paper Honorable Mention Award Supplemental material - Code - Fast forward video - Replicability stamp
		Ranking Viscous Finger Simulations to an Acquired Ground Truth with Topology-Aware Matchings Maxime Soler, Martin Petitfrere, Gilles Darche, Melanie Plainchault, Bruno Conche, Julien Tierny Proc. of IEEE Symposium on Large Data Analysis and Visualization 2019. Best Paper Award
		Task-based Augmented Reeb Graphs with Dynamic ST-Trees Charles Gueunet, Pierre Fortin, Julien Jomier, Julien Tierny Proc. of Eurographics Symposium on Parallel Graphics and Visualization 2019 Code - Data
		Topological Analysis of High Velocity Turbulent Flow Thibault Bridel-Bertomeu, Benjamin Fovet, Julien Tierny, Fabien Vivodtzev Proc. of IEEE Symposium on Large Data Analysis and Visualization 2019 (posters). Video1 - Video2 - Video3
		An Overview of the Topology ToolKit Talha Bin Masood, Joseph Budin, Martin Falk, Guillaume Favelier, Christoph Garth, Charles Gueunet, Pierre Guillou, Lutz Hofmann, Petar Hristov, Adhitya Kamakshidasan, Christopher Kappe, Pavol Klacansky, Patrick Laurin, Joshua A. Levine, Jonas Lukasczyk, Daisuke Sakurai, Maxime Soler, Peter Steneteg, Julien Tierny, Will Usher, Jules Vidal, Michal Wozniak Upcoming TopoInVis book (accepted).
		Statistical Parameter Selection for Clustering Persistence Diagrams Max Kontak, Jules Vidal, Julien Tierny Proc. of Super Computing workshop on Urgent HPC 2019
		Topological Data Analysis Made Easy with the Topology ToolKit, A Sequel Martin Falk, Christoph Garth, Charles Gueunet, Joshua A Levine, Jonas Lukasczyk, Julien Tierny, Jules Vidal IEEE VIS Tutorials 2019. Tutorial web page
		Task-based Augmented Contour Trees with Fibonacci Heaps Charles Gueunet, Pierre Fortin, Julien Jomier, Julien Tierny IEEE Transactions on Parallel and Distributed Systems Accepted, 2019. Code
		Persistence Atlas for Critical Point Variability in Ensembles Guillaume Favelier, Noura Faraj, Brian Summa, Julien Tierny IEEE Transactions on Visualization and Computer Graphics Proc. of IEEE VIS 2018. Video - Code - Replicability stamp
		Lifted Wasserstein Matcher for Fast and Robust Topology Tracking Maxime Soler, Melanie Plainchault, Bruno Conche, Julien Tierny Proc. of IEEE Symposium on Large Data Analysis and Visualization 2018. Best Paper Honorable Mention Award Online demo of the core algorithm
		Topological Data Analysis Made Easy with the Topology ToolKit Guillaume Favelier, Charles Gueunet, Attila Gyulassy, Julien Jomier, Joshua Levine, Jonas Lukasczyk, Daisuke Sakurai, Maxime Soler, Julien Tierny, Will Usher, Qi Wu IEEE VIS Tutorials 2018. Tutorial web page
		Topologically Controlled Lossy Compression Maxime Soler, Melanie Plainchault, Bruno Conche, Julien Tierny Proc. of IEEE PacificVis 2018. Code
		Topological Data Analysis for Scientific Visualization Julien Tierny Springer, 2018 (ISBN 978-3-319-71507-0).
		The Topology ToolKit Julien Tierny, Guillaume Favelier, Joshua Levine, Charles Gueunet and Michael Michaux IEEE Transactions on Visualization and Computer Graphics Proc. of IEEE VIS 2017. Best Paper Honorable Mention Award Video - Code
		Visualizing the Uncertainty of Graph-based 2D Segmentation with Min-path Stability Brian Summa, Julien Tierny, Valerio Pascucci Computer Graphics Forum. Proc. of EuroVis 2017.
		Task-based Augmented Merge Trees with Fibonacci Heaps Charles Gueunet, Pierre Fortin, Julien Jomier, Julien Tierny Proc. of IEEE Symposium on Large Data Analysis and Visualization 2017. Code
		Conformal Factor Persistence for Fast Hierarchical Cone Extraction Ana Vintescu, Florent Dupont, Guillaume Lavoue, Pooran Memari, Julien Tierny Proc. of Eurographics 2017 (short papers).
		Least Squares Affine Transitions for Global Paramterization Ana Vintescu, Florent Dupont, Guillaume Lavoue, Pooran Memari, Julien Tierny Proc. of WSCG 2017.
		Viscous Fingering: A Topological Visual Analytic Approach Jonas Lukasczyk, Garrett Aldrich, Michael Steptoe, Guillaume Favelier, Charles Gueunet, Julien Tierny, Ross Maciejewski, Bernd Hamann, and Heike Leitte Proc. of Conference on Physical Modeling for Virtual Manufacturing Systems and Processes 2017.
		Jacobi Fiber Surfaces for Bivariate Reeb Space Computation Julien Tierny and Hamish Carr IEEE Transactions on Visualization and Computer Graphics Proc. of IEEE VIS 2016. Best Paper Award Video - Code
		Fast and Exact Fiber Surfaces for Tetrahedral Meshes Pavol Klacansky, Julien Tierny, Hamish Carr, Zhao Geng IEEE Transactions on Visualization and Computer Graphics Accepted, to be presented at IEEE VIS 2016. Video - Code
		Contour Forests: Fast Multi-threaded Augmented Contour Trees Charles Gueunet, Pierre Fortin, Julien Jomier, Julien Tierny Proc. of IEEE Symposium on Large Data Analysis and Visualization 2016. Code
		Visualizing Ensembles of Viscous Fingers Guillaume Favelier, Charles Gueunet, Julien Tierny IEEE VIS Scientific Visualization Contest 2016. Honorable Mention Award Video
		Habilitation Thesis (HDR): Contributions to Topological Data Analysis for Scientific Visualization Julien Tierny Sorbonne Universite. April 2016. Committee: I. Bloch (President), J.-D. Fekete (Examiner), P. Frey (Examiner), H. Hagen (Reviewer), C. Johnson (Reviewer), B. Levy (Reviewer), P. Ricoux (Examiner), W. Schroeder (Examiner).
		Fiber Surfaces: Generalizing Isosurfaces to Bivariate Data Hamish Carr, Zhao Geng, Julien Tierny, Amit Chattopadhyay, Aaron Knoll Computer Graphics Forum. Proc. of EuroVis 2015, accepted. Video
		Distributed Seams for Gigapixel Panoramas Sujin Philip, Brian Summa, Julien Tierny, Peer-Timo Bremer, Valerio Pascucci IEEE Transactions on Visualization and Computer Graphics. Accepted.
		Conforming Morse-Smale Complexes Attila Gyulassy, David Guenther, Joshua Levine, Julien Tierny, Valerio Pascucci IEEE Transactions on Visualization and Computer Graphics. Proc. of IEEE VIS 2014, accepted.
		Characterizing Molecular Interactions in Chemical Systems David Guenther, Roberto Alvarez Boto, Julia Contreras-Garcia, Jean-Philip Piquemal, Julien Tierny IEEE Transactions on Visualization and Computer Graphics. Proc. of IEEE VIS 2014, accepted.
		Mandatory Critical Points of 2D Uncertain Scalar Fields David Guenther, Joseph Salmon, Julien Tierny Computer Graphics Forum. Proc. of EuroVis 2014, accepted. Video
		Active Stitching: Beyond Batch Processing of Panoramas Brian Summa, Julien Tierny, Peer-Timo Bremer, Giorgio Scorzelli, and Valerio Pascucci Technical Report, September 2013. Video
		Jacobians and Hessians of Mean Value Coordinates for Closed Triangular Meshes Jean-Marc Thiery, Julien Tierny, and Tamy Boubekeur The Visual Computer Journal. Accepted, 2013. Video - Code - Appendix
		Scalable Seams for Gigapixel Panoramas Sujin Philip, Brian Summa, Julien Tierny, Peer-Timo Bremer, Valerio Pascucci Proc. of Eurographics Symposium on Parallel Graphics and Visualization 2013. Best Paper Award.
		Optimal General Simplification of Scalar Fields on Surfaces Julien Tierny, David Guenther, and Valerio Pascucci Topological and Statistical Methods for Complex Data, Accepted.
		Accurate and robust shape descriptors for the identification of rib cage structures in CT-images with Random Forests Mariem Gargouri, Julien Tierny, Erwan Jolivet, Philippe Petit, Elsa Angelini Proc. of IEEE ISBI 2013.
		Quality Evaluation of 3D City Building Models with Automatic Error Diagnosis Jean-Christophe Michelin, Julien Tierny, Florence Tupin, Clement Mallet, and Nicolas Paparoditis Proc. of ISPRS Conference on SSG 2013.
		Generalized Topological Simplification of Scalar Fields on Surfaces Julien Tierny and Valerio Pascucci IEEE Transactions on Visualization and Computer Graphics. Proc. of IEEE VIS 2012, accepted. Video - Code
		Panorama Weaving: Fast and Flexible Seam Processing Brian Summa, Julien Tierny and Valerio Pascucci ACM Transactions on Graphics. Proc. of ACM SIGGRAPH 2012, accepted. Video
		CageR: Cage-based Reverse Engineering of Animated 3D Shapes Jean-Marc Thiery, Julien Tierny and Tamy Boubekeur Computer Graphics Forum. Accepted 2012, Presented at Eurographics 2013. Video - SIGGRAPH 2012 Talk
		Analytic Curve Skeletons for 3D Surface Modeling and Processing Jean-Marc Thiery, Bert Buchholz, Julien Tierny and Tamy Boubekeur Computer Graphics Forum. Proc. of Pacific Graphics 2012, accepted.
		Inspired quadrangulation Julien Tierny, Joel Daniels II, Luis Gustavo Nonato, Valerio Pascucci and Claudio Silva Computer Aided Design. Proc. of ACM SPM 2011, accepted. Video - Appendix
		Topology verification for isosurface extraction Tiago Etiene, Luis Gustavo Nonato, Carlos Scheidegger, Julien Tierny, Thomas Peters, Valerio Pascucci, Mike Kirby and Claudio Silva IEEE Transactions on Visualization and Computer Graphics. Accepted 2011, Presented at IEEE VIS 2011.
		Interactive quadrangulation with Reeb atlases and connectivity textures Julien Tierny, Joel Daniels II, Luis Gustavo Nonato, Valerio Pascucci and Claudio Silva IEEE Transactions on Visualization and Computer Graphics. Accepted, 2011. Video
		Topological methods in data analysis and visualization Valerio Pascucci, Xavier Tricoche, Hans Hagen and Julien Tierny (Editors) Springer, 2010 (ISBN 978-3-642-15013-5).
		Interactive exploration and analysis of large scale simulations using topology-based data segmentation Peer-Timo Bremer, Gunther Weber, Julien Tierny, Valerio Pascucci, Marcus Day and John Bell IEEE Transactions on Visualization and Computer Graphics. Accepted, 2010.
		Loop surgery for volumetric meshes: Reeb graphs reduced to contour trees Julien Tierny, Attila Gyulassy, Eddie Simon and Valerio Pascucci IEEE Transactions on Visualization and Computer Graphics, Vol 15, 2009. Proc. of IEEE VIS 2009. Videos
		Partial 3D shape retrieval by Reeb pattern unfolding Julien Tierny, Jean-Philippe Vandeborre and Mohamed Daoudi Computer Graphics Forum, Vol 28, 2009. Binaries
		Enabling advanced visualization tools in a web-based simulation monitoring system Emanuele Santos, Julien Tierny, Ayla Khan, Brad Grimm, Lauro Lins, Juliana Freire, Valerio Pascucci, Claudio Silva, Scott Klasky, Roselyne Barreto,, Norbert Podhorszki Proc. of IEEE eScience 2009.
		A topological framework for the interactive exploration of large scale turbulent combustion Peer-Timo Bremer, Gunther Weber, Julien Tierny, Valerio Pascucci, Marcus Day and John Bell Proc. of IEEE eScience 2009.
		Reeb graph based 3D shape modeling and applications Julien Tierny Ph.D. Thesis, LIFL, University of Lille. October 2008. Committee: A. Baskurt, B. Levy, C. Labit, A. Srivastava, S. Tison. Advisors: J.P. Vandeborre, M. Daoudi. Slides
		3D object indexing Stefano Berretti, Mohamed Daoudi, Alberto del Bimbo, Tarik Filali-Ansary, Pietro Pala, Julien Tierny and Jean-Philippe Vandeborre Chapter of "3D object processing: compression, indexing and watermarking". Wiley, 2008.
		Enhancing 3D mesh topological skeletons with discrete contour constrictions Julien Tierny, Jean-Philippe Vandeborre and Mohamed Daoudi The Visual Computer, Vol 24, 2008.
		Fast and precise kinematic skeleton extraction of 3D dynamic meshes Julien Tierny, Jean-Philippe Vandeborre and Mohamed Daoudi Proc. of IEEE ICPR 2008.
		Reeb chart unfolding based 3D shape signatures Julien Tierny, Jean-Philippe Vandeborre and Mohamed Daoudi Proc. of Eurographics 2007 (short paper).
		Topology driven 3D mesh hierarchical segmentation Julien Tierny, Jean-Philippe Vandeborre and Mohamed Daoudi Proc. of IEEE SMI 2007 (short paper). Video
		Geometry flavored topological skeletons: applications to shape handling, segmentation and retrieval Julien Tierny, Jean-Philippe Vandeborre and Mohamed Daoudi Proc. of Second DELOS Conference on Digital Libraries (invited paper), 2007.
		3D mesh models: view-based indexing and structural analysis Mohamed Daoudi, Tarik Filali-Ansary, Julien Tierny and Jean-Philippe Vandeborre Proc. of DELOS Conference on Digital Libraries (invited paper) Lecture Notes in Computer Science, 2007.
		3D mesh skeleton extraction using topological and geometrical analyses Julien Tierny, Jean-Philippe Vandeborre and Mohamed Daoudi Proc. of Pacific Graphics 2006. Video
		Invariant high level Reeb graphs of 3D polygonal meshes Julien Tierny, Jean-Philippe Vandeborre and Mohamed Daoudi Proc. of IEEE 3DPVT 2006.

CNRS - Sorbonne Universite
Computer Science Department (LIP6)

julien dot tierny at sorbonne-universite dot fr

4, Place Jussieu, 75005 Paris, France.
Office: 306, Hall 25-26
Phone: (+33) 1 44 27 88 25

News

Research

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Teaching

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Misc

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Julien Tierny

CNRS - Sorbonne Universite Computer Science Department (LIP6) julien dot tierny at sorbonne-universite dot fr 4, Place Jussieu, 75005 Paris, France. Office: 306, Hall 25-26 Phone: (+33) 1 44 27 88 25

News

Research

|

Teaching

|

Misc

|

CNRS - Sorbonne Universite
Computer Science Department (LIP6)

julien dot tierny at sorbonne-universite dot fr

4, Place Jussieu, 75005 Paris, France.
Office: 306, Hall 25-26
Phone: (+33) 1 44 27 88 25