Van Thinh VU, François BRÉMOND and Monique THONNAT
Project ORION of I.N.R.I.A. Sophia Antipolis
2004 route des Lucioles, BP93-06902 Sophia Antipolis Cedex
France
e-mail: {Thinh.Vu, Francois.Bremond, Monique.Thonnat}@sophia.inria.fr
http://www-sop.inria.fr/orion/orion-eng.html
ABSTRACT
The objective of this work is the visualisation and simulation for automatic
video interpretation. We have conceived a test framework that generates
3D animations corresponding to behaviours recognised by an automatic interpretation
system or corresponding to behaviours described by an expert. Conceiving
this test framework is essential in order to be able to develop and validate
the interpretation process. The objective of our test framework is (1)
to visualise the computation of the interpretation, (2) to be flexible
(configurable) enough for testing the different configurations of the interpretation
and (3) to be realist enough to understand what is interpreted. To solve
this problem we have defined six types of model to represent all the information
that is necessary for the interpretation. First, we propose a model of
the scene context (containing the 3D geometry) and a model for the virtual
camera. Second, we propose an articulated and hierarchical model for representing
the human body given its sub parts. We propose two other hierarchical models
for modelling human actions and scenarios, and also a model of scene-scenarios
that gathers all previous models. We have defined a description language
for representing these models. The obtained results are promising: we have
developed a test system for a given interpretation system and started evaluating
it by generating test animations.
Keywords: 3D visualisation, 3D animation, simulation, video understanding,
modelling of the human body, human behaviours and scenes.