Section: Bilateral Contracts and Grants with Industry

Bilateral Grants with Industry

Google Chrome University Research Programme

Participants : Pierre Alliez, Cédric Portaneri.

We developed a novel approach and software prototype for the compression of 3D models. Our main focus is on progressive compression of surface triangle meshes with color textures, with emphasis on fine grain, genericity and flexible metric. The proposed methodology is to turn the input models into a stream of refinements, in which both mesh and texture refinement details are multiplexed in accordance to rate-distortion principles. Fine grain is achieved through considering all components, local as well as non-local, from both the mesh and its textures: mesh complexity, vertex accuracy, texture definition and accuracy. We leveraged the recent advances on perceptual metrics to improve the visual appearance, and performed joint consolidation and encoding of the models to further optimize the rate-distortion tradeoffs and visual perception.

Dorea technology

Participants : Vincent Vadez, Pierre Alliez [contact] .

In collaboration with SME Dorea Technology, our objective is to advance the knowledge on the thermal simulation of satellites, via geometric model reduction. The survival of a satellite is related to the temperature of its components, the variation of which must be controlled within safety intervals. In this context, the thermal simulation of the satellite for its design is crucial to anticipate the reality of its operation. The project started in August 2018, for a total duration of 3 years.

Luxcarta

Participants : Jean-Philippe Bauchet, Florent Lafarge [contact] .

The goal of this collaboration is to design automated approaches for producing city models from the last generation of satellites. The models should conform to the level 2 (LOD2) of the popular CityGML format. The project started in October 2016, for a total duration of 3 years.

CNES and Acri-ST

Participants : Onur Tasar, Pierre Alliez, Yuliya Tarabalka [contact] .

The aim is to devise efficient representations for satellite images. The project started in October 2017, for a total duration of 3 years.

CSTB

Participants : Hao Fang, Florent Lafarge [contact] .

The goal of this recent collaboration is to develop methods for analyzing and exploring scale-spaces into urban 3D data. The project started in March 2016, for a total duration of 3 years.