Team IGG : Computer Graphics and Geometry

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The core business of IGG (Computer Graphics and Geometry) research group of the LSIIT Lab at the University of Strasbourg is geometric modeling conjugated under all its aspects: modeling, construction and proofs in geometry. The ''geometric and topological modeling'' sub-team studies the combinatorial models which are the common basis for the whole team.  Some people also work on the solving of
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geometric constraints which is a complementary point of view, especially the embeddings. And finally the ''specifications and proofs in geometry'' topic makes geometric modeling benefit from the latest advances in specifications and proofs. The other theme of the group is ''visualization, interaction and
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simulation''. It splits in two operations - ''simulation, visualization and rendering'' and ''3D Interaction'' - which are complementary in the sense that simulations require both interaction and visualization.
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[[fr:Accueil]]
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[[File:Igg.png|left|120px]]
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{{Image_Cadre|LapinsIGG.jpg|right|300}}
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Geometry is the core of the '''IGG''' group (Computer Graphics and Geometry) activity as in other national and international computer graphics research groups. Within '''IGG''', all researchers share the same vision of object representation. This vision separates the topological representation, or more generally the combinatorial aspects, from the embedding representation defining the geometry. This vision is the source of originality and strength of the research within the group.
  
Also, the program RéVA (2002-1008) allowed the group to consolidate its expertise in virtual reality and simulation. Theme 2 - ''visualization, interaction and simulation'' - focuses on those more recent topics which involve two of the four professors of the group, six of its associate professors and a research engineer. A virtual reality device - of workbench type - welcomes the developments of this theme's participants. A research engineer works on the ressources' centralization, especially through the development of a virtual reality software platform and its scientific applications focused on medical applications.
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Research, within the group, explore geometry and its involvement in shape modeling with adaptive combinatorial models, multiresolution, embedded with subdivision surfaces. Tactics for formal specification, resolution of geometrical constraint systems and geometry proofs are also developped. It leads to new problems for rendering and interaction in virtual environments and its applications reside in fields such as
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computer-assisted teaching, medical simulation, or digitization of heritage.
  
== History ==
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The acquisition techniques of the shape, appearance and movement have significantly increased the quality and resolution of models. But the race to the realism requires visual richness ever more, we are looking through adequate levels of detail for the shape, a sophisticated background for appearance and transposition of movements acquired on a reference model.
  
IGG group is the first research group in computer science - associated to the CNRS - that was created in Strasbourg by Jean-François Dufourd and Jean Françon, more than twenty years ago.
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The IGG group aims to define efficient geometric models, taking into account a wide range of data (constraints, medical imaging, digitization, motion capture), to conceive and reproduce the shape, appearance and movement of 3D objects for visualisation, simulation and interaction in virtual environments. These goals are articulated around three complementary themes :
  
[[Image:LapinsIGG.jpg|right|thumb|300px]] Since fifteen years this research group is composed of about ten teniors. In 10 years, since Dominique Bechmann came at its head, the group has been almost completey renewed : only Dominique Bechmann, Jean-François Dufourd and Pascal Schreck - who were associate professors (AP) at the time - were already in the team in 1997.
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The '''Computer Graphics Group''' is structured in three themes:
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* [[Specifications, Constraints and Proofs in Geometry|Specification, Constraints and Proofs in Geometry]]:
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[[Specifications, Constraints and Proofs in Geometry_Assessment2016-2021|'''Assessment 2016 - 2021''']] //
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[[Specifications, Constraints and Proofs in Geometry|Assessment 2011 - 2016]]
  
Several events, such as the departure of many researchers for laboratories in Poitiers (Eric Andrès PR, Yves Bertrand PR, Laurent Fuchs AP, Pascal Lienhardt PR), Limoges (Djamchid Ghanzanfarpour PR) and Clermont-Ferrand (Jean-Pierre Réveilles PR), and such as the integration of discrete geometry and mathematical morphology in the MIV group, the return of Jean-Michel Dischler from Limoges on a professor (PR) position in 2001, and the hiring of eight new associate professors during the time period of 2005-2008, have largely recomposed this team and redrawn its scientific contours.
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* [[Geometric Modeling, Simulation and Interaction|Geometric Modeling, Simulation and Interaction]]:
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[[Geometric Modeling, Simulation and Interaction_Assessment2016-2021|'''Assessment 2016 - 2021''']] //
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[[Geometric Modeling, Simulation and Interaction|Assessment 2011 - 2016]]
  
[[fr:Accueil]]
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* [[Appearance and Movement|Appearance and Movement]]:
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[[Appearance and Movement_Assessment2016-2021|'''Assessment 2016 - 2021''']]  //
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[[Appearance and Movement|Assessment 2011 - 2016]]
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Starting in 2024, the team will be organized into four themes:
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* Proofs in Geometry
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* [[3D Geometry and Animation]]
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* Textures, Rendering and Visualization
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* [[Human-Machine_Interaction_and_Virtual_Reality|Human-Computer Interaction and Virtual Reality]]
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'''Keywords:''' computer science, shape modeling, proofs and specifications, virtual reality, rendering
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{{PAGE_End}}

Latest revision as of 16:46, 13 September 2023

Igg.png
LapinsIGG.jpg

Geometry is the core of the IGG group (Computer Graphics and Geometry) activity as in other national and international computer graphics research groups. Within IGG, all researchers share the same vision of object representation. This vision separates the topological representation, or more generally the combinatorial aspects, from the embedding representation defining the geometry. This vision is the source of originality and strength of the research within the group.

Research, within the group, explore geometry and its involvement in shape modeling with adaptive combinatorial models, multiresolution, embedded with subdivision surfaces. Tactics for formal specification, resolution of geometrical constraint systems and geometry proofs are also developped. It leads to new problems for rendering and interaction in virtual environments and its applications reside in fields such as computer-assisted teaching, medical simulation, or digitization of heritage.

The acquisition techniques of the shape, appearance and movement have significantly increased the quality and resolution of models. But the race to the realism requires visual richness ever more, we are looking through adequate levels of detail for the shape, a sophisticated background for appearance and transposition of movements acquired on a reference model.

The IGG group aims to define efficient geometric models, taking into account a wide range of data (constraints, medical imaging, digitization, motion capture), to conceive and reproduce the shape, appearance and movement of 3D objects for visualisation, simulation and interaction in virtual environments. These goals are articulated around three complementary themes :

The Computer Graphics Group is structured in three themes:

Assessment 2016 - 2021 // Assessment 2011 - 2016

Assessment 2016 - 2021 // Assessment 2011 - 2016

Assessment 2016 - 2021 // Assessment 2011 - 2016

Starting in 2024, the team will be organized into four themes:

Keywords: computer science, shape modeling, proofs and specifications, virtual reality, rendering