 
Analyse et synthèse temps réel du visage pour la
télévirtualité
Copyright
Image(s): 640*480
 Jpeg Image (32 Ko) |
 Jpeg Image (20 Ko) |
 Jpeg Image (30 Ko) |
 Jpeg Image (10 Ko) |
- Agnès Saulnier
- Marie-Luce Viaud
- David Geldreich
- Institut National de l'Audiovisuel
Project : Télévirtualité
Email : virtuel@ina.fr
URL : http://www.mediaport.net/Ina/Recherche/TV/TV.en.html
Video(s) and extracted images: 320*240
Film
" Literature" |
Video QuickTime -> |
 (3.7 Mo) |
| Jpeg Images -> |
 (7 Ko) |
 (6 Ko) |
Film
" The mouth" |
Video QuickTime -> |
 (4.7 Mo) |
| Jpeg Images -> |
 (10 Ko) |
 (10 Ko) |
 (10 Ko) |
Film
" The head" |
Video QuickTime -> |
 (7.0 Mo) |
| Jpeg Images -> |
 (10 Ko) |
 (10 Ko) |
Film
" The eyes" |
Video QuickTime -> |
 (3.5 Mo) |
| Jpeg Images -> |
 (11 Ko) |
 (11 Ko) |
 (8 Ko) |
Film
" Expressions" |
Video QuickTime -> |
 (4.0 Mo) |
| Jpeg Images -> |
 (11 Ko) |
 (11 Ko) |
Film
" Laughing" |
Video QuickTime -> |
 (1.6 Mo) |
| Jpeg Images -> |
 (10 Ko) |
 (11 Ko) |
Description
A synthetic face is animated in real time from a real face. The spectator can see both faces
simultaneously.
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Keys Words :
- face
- image processing
- facial animation
- real time
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Technical Information
This film has been realized on a SGI indigo for the image capture and analysis and
with an extrème SGI for the synthetic face rendering.
More Information...
Bibliography :
(2) "Real-time facial analysis and synthesis for televirtualite",
Imagina's Proceedings pp173, 1994
Abstract :
Although the animation of virtual clones is no longer just a dream,
current drawbacks limit possible applications (contact device,
sensor, head immobilization in front of the camera, etc.).
In this article, we propose a real-time facial animation analysis/synthesis
chain which imposes few constraints. This study has been elaborated for a
televirtuality context: several physically distant persons intervene in a
common virtual environment via their synthetic representatives. They are
thus able to share a virtual community, enter a virtual minitel, follow a
visioconference, access telework operations, or even join in multi
participant games.
The system can be broken down as follows:
- Video input
- Real image analysis: extraction of characteristic parameters
- Symbolic interpretation of parameters
- Transfer of these parameters to a remote machine
- Animation of the symbolic or realistic computer graphics clone
- Video output
The video image processing is designed to extract real facial control
parameters. This chiefly consists of identifying head movements and
mouth deformations.
For the realistic model, parameters corresponding to facial muscle
movements derived from the analysis are interpreted in terms of muscular
intensity.
Only the parameters necessary for synthesis of the clone image are
transmitted via the network or telephone line.
The computer graphics clone may be either symbolic, in which case it
is based on a geometric model, or realistic, in which case it is endowed
with a muscular basis. In the latter case, the facial surface is
represented by a network of springs. Each muscle is modeled by forces,
and muscular deformations are calculated by solving dynamic equations
for the given system (face/force). The muscular deformations are then
pre calculated to obtain a system capable of real-time evolution. Finally,
facial texture is mapped onto the polygonal representation of the face.
Some external links :
-
 Televirtutality project
- http://www.mediaport.net/Ina/Recherche/TV
- Facial Animation
- http://mambo.ucsc.edu/psl/fan.html
- Facial Analysis
- http://mambo.ucsc.edu/psl/fanl.html
Some internal links :
- Same Author
-
 Facial animation and ageing
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