E-touch: Overlay-based video surveillance system for urban security

This paper presents a novel distributed video surveillance system (E-touch) on Overlay Network. E-touch is constructed by a set of overlay nodes that can provide intelligence media service. The system allows service composition of distributed stream processing applications dynamically, to satisfy their end-to-end QoS demands. Compare to traditional centralized-group management scheme, our approach achieves better scalability and resource utilization by efficiently allocating media service resources. Large-scale experimental results demonstrate the scalability, efficiency and performance of the E-touch system.