Video surveillance is an important part of public security.As the scale of surveillance network keeps growing

traditional surveillance systems fail to perform intelligent task on camera network.Large scale camera network requires high processing power and high efficient algorithm of correlation analysis.In order to solve this problem

a novel architecture for surveillance system is proposed

based on tree structure.This system can take full advantage of server cluster to efficiently run various algorithms and easily handle multi-camera correlation analysis loaded on it.This system has been tested in the network consisting of 20 HD cameras

and its stable performance verifies the rationalization of the design.