This book deals with mobile robot autonomous navigation in natural (unstructured outdoor) environment. This is a very difficult task and we propose an appropriate but not avoidably complex solution using a vision based perception system and a behaviour based (re)action system. Since we could not use a real robot and for general testing purpose, we developed a real mono camera based vision acquisition system and a virtual acting 3D environment for mobile robot navigation. We developed a virtual environment called VIMRINNE (Virtual Interface for Mobile Robot Instant Navigation in Natural...