IOS Press - Article

Journal of Intelligent and Fuzzy Systems
Issue:  Volume 18, Number 3 / 2007
Pages:  217 - 232
URL: Linking Options
Special Issue: Marco Somalvico Memorial Issue
Guest Editor(s): M. Colombetti, G. Gini, E. Nissan
Published Online: 06 June 2007
Knowledge propagation in a distributed omnidirectional vision system
E. Menegatti A1, C. Simionato A1, S. Tonello A1, G. Cicirelli A2, A. Distante A2, H. Ishiguro A3, E. Pagello A1 A4
A1 Intelligent Autonomous Systems Laboratory, Department of Information Engineering (DEI), Faculty of Engineering, University of Padua, Padova, Italy
A2 Institute of Intelligent Systems for Automation, National Research Council, Bari, Italy
A3 Department of Adaptive Machine Systems, Osaka University, Suita, Osaka, 565-0871 Japan
A4 Institute of Biomedical Engineering of the National Research Council (ISIB-CNR), Padova, Italy
Abstract:
In this paper an omnidirectional Distributed Vision System (DVS) is presented. The presented DVS is able to learn to navigate a mobile robot in its working environment without any prior knowledge about calibration parameters of the cameras or the control law of the robot (this is an important feature if we want to apply this system to existing camera networks). The DVS consists of different Vision Agents (VAs) implemented by omnidirectional cameras. The main contribution of the work is the explicit distribution of the acquired knowledge in the DVS. The aim is to develop a totally autonomous system able not only to learn control policies by on-line learning, but also to deal with a changing environment and to improve its performance during lifetime. Once an initial knowledge is acquired by one Vision Agent, this knowledge can be transferred to other Vision Agents in order to exploit what was already learned. In this paper, first we investigate how the Vision Agent learns the knowledge, then we evaluate its performance and test the knowledge propagation on three different VAs. Experiments are reported both using a system simulator and using a prototype of the Distributed Vision System in a real environment demonstrating the feasibility of the approach.