Outreach

CGoGN is the geometric modeling platform of the IGG group. It is developped in C++ and provides an efficient and easy to use implementation of combinatorial maps, a topological model that allows the representation of meshes in any dimension (curves, surfaces, volumes, ...) and gives an optimal access to the neighborhood relations between the cells (vertices, edges, faces, ...). Several operators allow the manipulation of the meshes connectivity and many algorithms allow the computation of properties attached to the cells thanks to a dynamic attribute system. Multiresolution extensions allow the representation and traversal of objects at different scales. CGoGN permet à l'équipe de développer et tester de nombreux travaux notamment autour des activités en modélisation géométrique (acquisition, déformation, subdivision, simplification, ...). La représentation de maillages est également au coeur de nombreux domaines tels que la simulation numérique en mécanique des solides ou des fluides. Grâce à sa généricité et son efficacité, CGoGN est une bibliothèque particulièrement adaptée à ce contexte applicatif exigeant et plusieurs collaborations sont actuellement en cours dans ce cadre.

We develop the ExRealis digitization platform. ExRealis offers a range of devices and software tools covering the whole digitization processing pipeline, from data acquisition to the creation of textured 3D models, that also proposes some tools for texture reconstruction and visualization accounting for complex lighting environments or material characteristics. Our software tools are based on out-of-core data structures and mechanisms that allow very large data management: millions of sample points and hundreds of photographs for a single object. ExRealis also includes a motion capture system for the animation of avatars in virtual reality or biomechanical applications. Our platform covers our needs in terms of acquisition and data processing and also makes it possible to capitalize developments achieved through our scientific production.

PILOT software, developed by Caroline Essert and students, is protected by copyright. It was deposited at the Programs Protection Agency (APP) in Jul. 2015 under file n. IDDN.FR.001.280006.000.R.P.2015.000.31230: PILOT, and its spin-offs Brain-PILOT, RF-PILOT, Cryo-PILOT, is a preoperative assistance tool aiming at helping the surgeon in the decision-making process. It proposes automatically optimal trajectories for surgical tools (needles, electrodes) for percutaneous or keyhole procedures. It is currently under clinical testing in 3 different hospitals : Rennes Pontchaillou University Hospital, Pitié-Salpêtrière Paris Hospital, Strasbourg University Hospital, and expected soon at Trondheim hospital (Norway) and Brigham & Women's Hospital in Boston (USA).

Provisional patent application filed in the United States Patent Office on September 11, 2014. Serial No. 62/048,908. Inventors: Olga Dergachyova (30%), Caroline Essert (30%), Claire Haegelen (20%), Pierre Jannin (20%).

By way of its work on digitization, IGG team had the opportunity to execute several services (see also ExRealis framework):

Within the framework of the Eveil3D project, and in partnership with the technology transfer center Holo3, the digitization of two statues of the cathedral of Strasbourg has been performed in october 2013 for the Œuvre Notre Dame foundation. The goal was to use these statues in an immersive 3D environment for a language learning serious game.
The Inter-university House of Human Sciences (MISHA), Strasbourg, has at its disposal a huge collection of ethnographic artefacts, and has launched some years ago a project based on the OpenSIM game engine that provides a virtual world to make it possible the study and the contextualization of these artefacts. Obviously, this requires to have digital copies of them. A digitization campaign has thus been performed in autumn 2013 in order to produce digital copies of about ten african ethnographic artefacts.

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