The STORM research group at IRIT, develops its activities in the field of Computer Graphics. From geometric modeling to realistic rendering, STORM aims at developing computationally efficient models and tools for digital content creation and edition.

The member of the STORM research groups are recognized expert in the following field of computer graphics :

    • Colors and perception
    • Expressive rendering
    • Physically based rendering
    • Real time rendering
    • Implicit surfaces modeling
    • 3D Mesh processing
    • 3D Point cloud processing
    • 3D Shapes analysis
    • Skeleton-based computer animation

Research Activities

Content creation for computer graphics remains a complex problem while requirements and expectations from a constantly increasing number of users are getting more and more prominent.

On the one hand, the representation and computation of data require to combine 3D objects, animation parameters, and lighting parameters. Hence the computation of a picture leads to mathematical modeling, data structure and algorithmic complexity problems.

On the other hand, creating, acquiring, editing, and exploiting such data relies on efficient user interactions with these objects and requires versatile creation and edition metaphors hiding the mathematical complexity of the 3D content.

This ambivalent vision of content creation for computer graphics is at the heart of our scientific objectives : the definition of domain-centered content creation frameworks for animated computer graphics.

By relying on our joint geometry/appearance approach, we address bottlenecks in geometric aspect of skeletal animation guided by visual objectives, efficient sampling and reconstruction strategies for stochastic algorithms, user editing method for picture generation as well as multi-scale feature guided geometric reconstruction from acquired 3D data.

Collaborations and research valorization

Based on our research directions and on our expertise in 3D computer graphics, we collaborate with academic partners and industrial groups to build knowledge, models and tools towards the following applications :

    • Geometric modeling for real-time web 3D applications
    • 3D data acquisition, segmentation and classification for reverse engineering in CAD.
    • Numerical integration method for spectral radiative transfer simulation.
    • Color edition and transformation for visual content creation.
    • Interactive models and tools for computer animation.


Graphic computing
Geometric modeling
Rendering, animation and simulation
Acquisition, reconstruction and processing of 3D geometry
Acquisition, reconstruction and treatment of appearance

Members team

Permanent members
Non-permanent members

publications team

International journals articles
  • Thibault Lejemble, David Coeurjolly, Loic Barthe, Nicolas Mellado

    Stable and efficient differential estimators on oriented point clouds

    Computer Graphics Forum, Wiley, 2021


  • Jie Shao, Wuming Zhang, Aojie Shen, Nicolas Mellado, Shangshu Cai, Lei Luo, Nan Wang, Guangjian Yan, Guoqing Zhou

    Seed point set-based building roof extraction from airborne LiDAR point clouds using a top-down strategy

    Automation in Construction, Elsevier, 2021, 126, pp.103660. ⟨10.1016/j.autcon.2021.103660⟩


  • Amélie Fondevilla, Damien Rohmer, Stefanie Hahmann, Adrien Bousseau, Marie-Paule Cani

    Fashion Transfer: Dressing 3D Characters from Stylized Fashion Sketches

    Computer Graphics Forum, Wiley, 2021, pp.1-18


  • Chuan Yan, David Vanderhaeghe, Yotam Gingold

    A Benchmark for Rough Sketch Cleanup

    ACM Transactions on Graphics, Association for Computing Machinery, 2020, 39 (6), pp.163.1 – 163.14. ⟨10.1145/3414685.3417784⟩


  • Nicolas Bonneel, David Coeurjolly, Julie Digne, Nicolas Mellado

    Code Replicability in Computer Graphics

    ACM Transactions on Graphics, Association for Computing Machinery, 2020, 39 (4), ⟨10.1145/3386569.3392413⟩


  • Jie Shao, Wuming Zhang, Nicolas Mellado, Nan Wang, Shuangna Jin, Shangshu Cai, Lei Luo, Thibault Lejemble, Guangjian Yan

    SLAM-aided forest plot mapping combining terrestrial and mobile laser scanning

    ISPRS Journal of Photogrammetry and Remote Sensing, Elsevier, 2020, 163, pp.214-230. ⟨10.1016/j.isprsjprs.2020.03.008⟩


  • Anahid Ghazanfarpour, Nicolas Mellado, Chems Himeur, Loic Barthe, Jean Pierre Jessel

    Proximity-Aware Multiple Meshes Decimation using Quadric Error Metric

    Graphical Models, Elsevier, 2020, pp.101062. ⟨10.1016/j.gmod.2020.101062⟩


  • Thibault Lejemble, C Mura, Loic Barthe, N Mellado

    Persistence Analysis of Multi-scale Planar Structure Graph in Point Clouds

    Computer Graphics Forum, Wiley, In press


  • François Desrichard, David Vanderhaeghe, Mathias Paulin

    Global Illumination Shadow Layers

    Computer Graphics Forum, Wiley, 2019, 38 (4), ⟨10.1111/cgf.13781⟩


  • Thomas Buffet, Damien Rohmer, Loic Barthe, Laurence Boissieux, Marie-Paule Cani

    Implicit Untangling: A Robust Solution for Modeling Layered Clothing

    ACM Transactions on Graphics, Association for Computing Machinery, 2019, Proc. ACM SIGGRAPH, 38 (4), pp.Article No. 120:1-12. ⟨10.1145/3306346.3323010⟩


  • National journals articles
    International conferences articles
  • E Moscoso Thompson, G Arvanitis, K Moustakas, N Hoang-Xuan, E R Nguyen, M Tran, Thibault Lejemble, Loic Barthe, Nicolas Mellado, C Romanengo, S Biasotti, B Falcidieno

    SHREC’19 track: Feature Curve Extraction on Triangle Meshes

    12th EG Workshop 3D Object Retrieval 2019, May 2019, Gênes, Italy. pp.1 – 8


  • Anahid Ghazanfarpour, Nicolas Mellado, Loic Barthe, Jean Pierre Jessel

    Mesh Simplification for Virtual Objects Disassembly (j-FIG 2018, Poitiers, France)

    Journées Françaises d’Informatique Graphique (j-FIG 208), GDR IGRV; AFIG, Nov 2018, Poitiers, France


  • François Desrichard, David Vanderhaeghe

    Analysis of Path Space for Layered Light Editing

    Journées Françaises d’Informatique Graphique, Nov 2018, Poitiers, France


  • Hugo Rens, Mathias Paulin

    Dimension reduction of path space for visualisation and sampling (J-FIG 2018, Poitiers, France)

    Journées Françaises d’Informatique Graphique – J-FIG 2018, Nov 2018, Poitiers, France


  • Thibault Lejemble, Claudio Mura, Loic Barthe, Nicolas Mellado

    Multi-scale Planar Segments Extraction from Point Clouds

    Journées Françaises d’Informatique Graphique, Nov 2018, Poitiers, France


  • Even Entem, Amal Parakkat, Marie-Paule Cani, Loic Barthe

    Structuring and layering contour drawings of organic shapes

    Expressive 2018 – Joint Symposium on Computational Aesthetics and Sketch-Based Interfaces and Modeling and Non-Photorealistic Animation and Rendering, Aug 2018, Victoria, Canada. pp.1-14, ⟨10.1145/3229147.3229155⟩


  • Sidonie Christophe, Bertrand Dumenieu, Antoine Masse, Charlotte Hoarau, Jérémie Ory, Mathieu Brédif, François Lecordix, Nicolas Mellado, Jérémie Turbet, Hugo Loi, Thomas Hurtut, David Vanderhaeghe, Romain Vergne, Joëlle Thollot

    Expressive map design: OGC SLD/SE++ extension for expressive map styles

    ICC 2017 – 28th International Cartographic Conference, Jul 2017, Washington DC, United States. pp.1 – 3, ⟨10.5194/ica-proc-1-21-2018⟩


  • International conferences articles
    National conferences articles
  • Pierre Mézières, Mathias Paulin

    Projection efficace de lumières sphériques sur les harmoniques sphériques

    Journées Françaises d’Informatique Graphique (JFIG 2020), Nov 2020, Nancy (en distanciel), France


  • Conferences articles without published proceedings
    Books parts
    Thesis and HDR
  • Thibault Lejemble

    Multi-scale Point Cloud Analysis

    Computer Vision and Pattern Recognition [cs.CV]. Université Paul Sabatier – Toulouse III, 2020. English. ⟨NNT : 2020TOU30184⟩


  • Anahid Ghazanfarpour

    Proximity-aware multiple meshes decimation using quadric error metric

    Multimedia [cs.MM]. Université Paul Sabatier – Toulouse III, 2019. English. ⟨NNT : 2019TOU30168⟩


  • Baptiste Angles

    Geometric modeling with primitives

    Networking and Internet Architecture [cs.NI]. Université Paul Sabatier – Toulouse III, 2019. English. ⟨NNT : 2019TOU30060⟩


  • Even Entem

    Intuitive modeling of 3D objects from outline drawing. Application tothe design of virtual animals.

    Modeling and Simulation. Université Grenoble Alpes, 2018. English. ⟨NNT : 2018GREAM054⟩


  • Valentin Roussellet

    Implicit muscle models for interactive character skinning

    Image Processing [eess.IV]. Université Paul Sabatier – Toulouse III, 2018. English. ⟨NNT : 2018TOU30055⟩


  • Thesis and HDR
    Other publications

    Contracts team

    AcronymeTitreResp. scDébut – fin
    CaLiTrOp anr Analyse des opérateurs de transport lumineux pour l’image de synthèse Mathias PAULIN
    2017 – 2022
    MCG-RAD anr Calcul par Monte-Carlo des forçages radiatifs à l’échelle globale Mathias PAULIN
    2018 – 2022
    STRUCTURES anr Structures: hierarchical motion representation for stylized rendering David VANDERHAEGHE
    2020 – 2024
    [Contract completed]
    anr Fonctions multi-couches dynamiques pour l’animation de personnages Loïc BARTHE
    2016 – 2020
    [Contract completed]
    autre Modèles et Maillages Implicites Loïc BARTHE
    2012 – 2015
    [Contract completed]
    Représentations stylisées en cartographie David VANDERHAEGHE
    2012 – 2016
    [Contract completed]
    autre Approche multi-physique et parallèle de l’électromagnétisme pour les radio-communications et l’espace Mathias PAULIN
    2011 – 2014
    AcronymeTitreResp. scDébut – fin
    [Contract completed]
    autre Solar Facilites for the European Research Area Mathias PAULIN
    2009 – 2013
    AcronymeTitreResp. scDébut – fin
    PSL PostFX Shadow Layers David VANDERHAEGHE
    2020 – 2022
    [Contract completed]
    Simplification d’objets 3D sous contraintes Mathias PAULIN
    2019 – 2021
    [Contract completed]
    Constrained Palette – Space Exploration Loïc BARTHE
    Nicolas MELLADO
    2017 – 2019
    [Contract completed]
    Acquisition de l’apparence de la peau humaine pour la synthèse d’images et la réalité augmentée : une approche robuste, précise et peu coûteuse Mathias PAULIN
    2010 – 2012
    Wednesday 9 December 2020, 15h30
    Multi-scale Point Cloud Analysis
    Thibault LEJEMBLE – Team STORM, IRIT UT3 Paul Sabatier, En visioconférence
    Friday 22 November 2019, 10h30
    Proximity-Aware Multiple Meshes Decimation using Quadric Error Metric
    Anahid GHAZANFARPOUR – Team REVA, Team STORM, IRIT UT3 Paul Sabatier, IRIT, Auditorium J. Herbrand
    Monday 25 June 2018, 14h00
    Modèles de muscles implicites pour déformation de peau interactive
    Valentin ROUSSELLET – Team STORM – IRIT UT3 Paul Sabatier, IRIT, Auditorium J. Herbrand
    Friday 7 June 2019, 12h30 – 13h30
    3D multimodal interaction with virtual environments
    Maud MARCHAL – Maître de conférences INSA, IRISA Rennes UT3 Paul Sabatier, IRIT, Salle des Thèses
    Friday 17 May 2019, 12h30 – 13h30
    Geometry processing on Voxel Objects
    David COEURJOLLY – Directeur de Recherche CNRS, Laboratoire LIRIS – Lyon UT3 Paul Sabatier, IRIT, Salle des Thèses
    Friday 9 November 2018, 12h30 – 14h00
    CGAL — The Computational Geometry Algorithm Library
    Sébastien LORIOT – GeometryFactory UT3 Paul Sabatier, IRIT, Salle des Thèses
    Monday 7 November 2016, 13h30 – 15h00
    Position-based Skin Deformations for Interactive Character Animation
    Nadine ABU RUMMAN – doctoral Researcher at Friedrich-Alexander University (Allemagne) IRIT, Salle 175