Laboratoire d'InfoRmatique en Image et Systèmes d'informationLIRIS UMR 5205 CNRS/INSA de Lyon/Université Claude Bernard Lyon 1/Université Lumière Lyon 2/Ecole Centrale de Lyon

Université Claude Bernard Lyon 1, bâtiment Nautibus43, boulevard du 11 novembre 1918 — F-69622 Villeurbanne cedex

http://liris.cnrs.fr

UMR 5205

Présentation LIRIS - 04/21/23

LIRIS

Présentation LIRIS - 04/21/23 2

At a glance…

270 people8 (+4) CNRS staff~100 academic staff140 PhD studentsbudget: 1.2 M€/year6 physical locations

LIRIS 2007 =

Présentation LIRIS - 04/21/23 3

Scientific presentation

Modeling and augmented realityAxis 3

Knowledge and complex systems

Axis 1

Images and videos : segmentation and extraction of information

Axis 2

Communicating information systemsAxis 4

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Application domains

Cultural Heritage

EROS 3D et Art3D with Louvre museum

U.E. Art3D (European museums)

Life quality

Radiotherapy et hadrontherapy

Cytology

Augmented reality and pain therapy

Digital entertainment

Video games

Visual art and architecture

Geometric modelingComputational Geometry

3D Reconstruction, dynamic and selective Compression Frequency descriptors Geometric computations (CGAL)

Fractal GeometryFractal Reconstruction

Hybrid Modeling

Theme- Mesh quality

DAVID3 617 008

points

123 529 points (-96%)

4min 6s

+29 134 points42s

Local dynamic update

Theme- Fractal model

Fractal approximation of rough shapes, modeler for creation

Reconstruction of mountains with fractal model

Visual artMartine Rondet -Mignotte

Simulation and augmented reality

Simulation of natural phenomena Addition of details (simulation of cracks and fractures,of lich

growth, of mushrooms, …)

Physical Simulation Particle systems Continuous media mechanics

Analysis and quantification of movement Reconstruction of postures and movements

Theme- Simulation

Simulation of ecosystems and natural phenomena

Theme Simulation-hadrontherapy

Radiotherapy/Hadrontherapy

Moving organs

Movements of tumor

Prediction of movement by simulating the behavior

Theme Simulation-Hadrontherapy

Approach FEM

Simulation of deformable objects

Masses/spring interaction

ParameterizationTaking into account rheological parameters

Parallel computing

Example

Mouvements respiratoires interne

Theme Simulation- Hadrontherapy

Non rigid image registration

Theme- Posture reconstruction and the track of a character’s movements

separation character /

backgroundExtraction of a skeletal animation +  Voxel model

Reconstruction of the envelope: Shape and texture

Views calculated from the

model and texture

Theme- Posture reconstruction and the track of a character’s movements

Theme- Posture reconstruction and the track of a character’s movements

Augmented reality and “phantom pains”Amputee

Adding a virtual animated member in the image (valid member+ EMG)

Electromyographic signals (EMG) at the level of residual

member

Theme – 3D modeling from photos

3D avatar reconstruction from 2 photos

3D face reconstruction face from a pictureShape from shading

3D

Photoavec

shading

3D

Rendering

Realistic rendering and Perceptual renderingLight vectorsSpectral approachUse of vision models

Towards interactive rendering Use of graphic cards Use of a Ray Tracer -> « Instant radiosity » + Metropolis

-> YACORT (open free ray tracer)

Rendering

Interactive rendering

Interactive rendering

Augmented reality

Augmented reality