I joined the CNRS as a permanent researcher in October 2010. Since September 2014, I am a faculty member of the Scientific Computing Department of the LIP6 lab at Sorbonne Universites UPMC. From 2010 to 2014, I was a faculty member of the TII Team of the LTCI  lab at Telecom ParisTech. Prior to my CNRS tenure, I held a postdoctoral research associate position at the Scientific Computing and Imaging Institute at the University of Utah. I defended my Ph.D. thesis in October 2008 at the University of Lille.
My research interests include topological and geometrical analysis of 3D data for Scientific Visualization and Graphics: Topological Data Analysis, Uncertainty, Computational Topology, Morse Theory, etc.
I'm always looking for talented and motivated students to work with. Feel free to send me internship applications.

   News

 · O'Reilly selected TTK among its daily Four short links! [April 3rd, 2017]
 · We are excited to announce the open-source release of the Topology ToolKit! [April 1st, 2017]
 · Our paper on graph cuts uncertainty has been accepted to EuroVis [March 19th, 2017]
 · The February issue of the IEEE Computing Now magazine discusses my work on bivariate Reeb spaces! [February 3rd, 2017]
 · I received the Best Paper Award at IEEE VIS 2016 for my work on bivariate Reeb spaces! [September 1st, 2016]
 · Our IEEE SciViz contest entry was awarded an honorable mention! [September 1st, 2016]


Research

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Teaching

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Misc

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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.
Conformal Factor Persistence for Fast Hierarchical Cone Extraction

Ana Vintescu, Florent Dupont, Guillaume Lavoue, Pooran Memari, Julien Tierny

Proc. of Eurographics 2017 (short papers).
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
Contributions to Topological Data Analysis for Scientific Visualization

Julien Tierny

Habilitation Thesis, Sorbonne Universites UPMC.
April 2016.

Committee:
I. Bloch (President), J.-D. Fekete (Examiner), P. Frey (Examiner), H. Hagen (Reviewer), C. Johnson (Reviewer), B. LÚvy (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. LÚvy, 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.


Updated on April 15th, 2017.