Les sites web dédiés aux applications développées au sein de XLIM, site de Poitiers, sont accessibles à la rubrique Développements logiciels.
Le projet TRILION, initié en 1998, a pour objectif de transmettre des
images fixes et animées sur de longues distances via le canal
ionosphérique. Il résulte d'une collaboration entre l'équipe SYSCOM du
laboratoire SIC et l'équipe CPR de l'IETR. La page WEB suivante présente
le système opérationnel et les résultats obtenus pour la transmission
d'images fixes finalisé en 2005. Son adaptation pour la transmission
visioconférence est en cours de développement.
Our work aims at defining a complete system for defining efficient
representations dedicated to architectural environments.
We are interested in modeling, rendering and lighting simulations.
Therefore, we propose a topological model including semantics, geometry,
photometry and radiometry descriptions.
We have defined a hierarchical approach for modeling with multi-partitions.
Our lighting simulation system handles very large building, either with
radiosity or photon shooting, on a single processor or with a parallel system.
In this project, our goal is to insert image-based objects into virtual
environments, using image-based rendering techniques combined with usual
rendering techniques.
The main problems concern: object depth, object placement, surface reshading,
shadows and so on.
Fisrt, we aim at recovering as much information as possible from a set of
photographs (object shape, BRDF, light sources, etc).
Then, recovered information is combined with the original images for the object
relighting and integration into virtual scenes.
Jerboa provides both a dedicated language and a software library to prototype
topology-based geometric modeler in a fast and safe way.
Once the manipulated objects are specified (dimension, data types), operations
can be graphically defined within Jerboa by rules.
A syntactic analyser automatically checks that the operation under definition
is consistent and indicates what is wrong otherwise.
Once operation rules are defined, the prototyped modeler can be generated
and directly exploited.
The monogenic signal theory can be extended for color image processing.
The 2d phase invariant multi-scale & edge contour analysis based on a local
AM-FM becomes the elliptical monogenic representation by R. Soulard and P. Carré.
We aim at making our work as understandable as possible, and our experiments reproductible.
This is why a dedicated minimal MATLAB code is provided in every section.
The reader shoud be familiar with basic signal and imag processing (2D Filtering, FFT).
