Abstract : The aim of this paper is to present a new animation technique to control a humano?in a virtual environment. This control technique is issued from a need to simplify input parameters for automatic generation of motions, according to the simulation of the visual perception for a synthetic humano? The proposed method is founded on an image-based technique or more commonly called in the robotic field visual servoing. It consists in controlling the humano?s motions through the image it ``perceives''. This approach is dedicated to highly reactive contexts (video games, virtual reality), as far as it is based on a closed loop system. We also discuss of the integration of such a technique in a more complex behavioural system.