The dancer , who was in the premises of Grimage , platform common virtual reality and Inria Grenoble INP Montbonnot was accompanied by musicians in Spain, Poland and Lithuania. Evolving in a monochrome room, his body and his movements were captured by cameras whose images were used to reconstruct a 3D model of the artist in real time. At first , the profile of the dancer is recut to develop a model consisting of a set of triangular faces in 3D ( polyhedron ) . This is then placed with the musicians in a virtual scene . The dancer is colored texture mapping reproduced from images captured in real time.
This is sent via the network broadband Vilnius, and projected onto a screen in front of spectators and the attendant Lithuanian . During the show , the dancer also danced with his clones , demonstrating that the numerical model obtained is infinitely reproducible . "To get a perfect synchronization of dance music, he had to juggle time calculations and audio and video transmission from one country to another, explains Frédéric Noël , teacher at Grenoble INP - Industrial Engineering and researcher GSCOP laboratory . With more resources, including more powerful computers and 3D projection systems in Vilnius , the dancer could be viewed in 3D stereoscopy or as a hologram in the auditorium . "
Beyond the 3D reconstruction , there is behind this new experience demonstrated some ability to control the Grenoble scientific networks flows. "All data must flow simultaneously in high-speed ( up to 1 Gbit / s) , which in this case was carried out on a non- secure broadband network . " Of course we can also imagine applications in the field of telepresence, which would allow two people away from each other to meet in a virtual space with a strong sense of presence of each other, but also industrial robotics example. This opens a whole field of inquiry into the use, acceptability and performance of these techniques telepresence .
This experiment was carried out in the framework of international agreements infrastructure Visionair , who coordinated technical support teams PSNC in Poznan and i2CAT in Barcelona, ??Grimage platform and the G- SCOP laboratory. "If the basic technologies exist and are located in Europe , the strength of the organization is Visionair use cases integrating these resources and the provision for non-specialist users of the underlying technologies . What we do today artists can be replicated in many other contexts where visualization and interaction are required. "
You will find an explanation of this unique experience in the regional newspaper of November 13, France 3 , France Inter and newspaper 7am .
Web site contacts: Frédéric Noël : G- SCOP laboratory , scientific coordinator VISIONAIR Bruno Raffin : member of the team MOAIS (LIG ) Jean- Sebastien Franco: member of the team MORPHEO (LIG )
" The work described here was funded by the Européene community under the 7th framework program for research and development via the approval of infrastructure funding (I3) VISIONAIR 262044 . "