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Cooperative Distributed Vision for Mobile Robots: 

Cooperative Distributed Vision for Mobile Robots E. Menegatti and E. Pagello IAS-Lab Dept. of Electronics and Informatics The University of Padua Italy

Presentation’s Outline: 

Presentation’s Outline What’s Distributed Vision Previous works Our projects: Two Vision Agents on a Robot Cooperative Object Tracking with Mobile Robots

Distributed Vision: 

Distributed Vision What is it? It is a set of vision systems embedded in the environment and connected by a network DV tasks? Real time wide area surveillance Cooperative tracking of objects

Previous Works: 

Previous Works Cooperative Distributed Vision [1999] T. Matsuyama at Kyoto University (Japan) Distributed Vision System (DVS) [1997] H. Ishiguro at Wakayama University (Japan)

The CDV testbed: 

A simple room Uniform background A big box 4 Fixed Viewpoint PTZ cameras Task: Track a radio controlled car or two people The CDV testbed

CDV limitations : 

CDV limitations Expensive hardware for Fixed Viewpoint camera Appearance Plane Active cameras but static image processing Very simple vision algorithm No implementation for mobile robots

The DVS testbed: 

The DVS testbed A toy town Outdoor-like lighting 2 non-autonomous robots 16 VAs Task: Navigate two mobile robots in the town

DVS limitations: 

DVS limitations No moving cameras Need teaching phase Robot is not autonomous Very simple vision algorithm

The Heterogeneous Team: 

The Heterogeneous Team The Artisti Veneti RoboCup Team

Two Vision Agents on a Robot: 

Two Vision Agents on a Robot Vision Agent Omnidirectional Vision Agent (OVA) Perspective Vision Agent (PVA) Task: Detect and Locate

Agents’ Views: 

Agents’ Views OVA’s view PVA’s view

Cooperative Object Tracking: 

Cooperative Object Tracking Cooperative Object Tracking Protocol [Matsuyama 1999] (NO Mobile Robots!!!) Agency and Agency’s Master A measure of uncertainty yabs = ysl+ yrel

Conclusion: 

Conclusion The Cooperative Distributed Vision idea Two realisations We presented our researches on this topic: Two VAs on a robot Cooperative Object Tracking