SURVEILLANCE SYSTEM INCLUDING A LARGE NUMBER OF CAMERAS
The surveillance system includes video detectors, and central aggregation device including a control device for controlling the video detectors, and a display device and image analysis device for displaying and analyzing images coming from one or more video detectors. The system further includes an intermediate aggregation device connected to a subset of the video detectors and to the central aggregation device, and including a merging device adapted to analyze the images from at least two video detectors of the subset of video detectors in order to trigger an alarm sent to the central aggregation device as a function of the result of the analysis.
1 . A surveillance system comprising:
a plurality of video detectors, and
central aggregation means comprising:
first control means for controlling the video detectors, and
display means and image analysis means for displaying and analyzing images coming from one or more video detectors,
intermediate aggregation means connected to a subset of the video detectors and to the central aggregation means, and
merging means adapted to analyze the images from at least two video detectors of the subset of video detectors in order to trigger an alarm sent to the central aggregation means as a function of the result of said analysis.
2 . A system according to claim 1 , wherein the intermediate aggregation means further include second control means for controlling the video detectors of the subset of video detectors and adapted to broadcast commands received from the first control means of the central aggregation means towards the video detectors.
3 . A system according to claim 1 , wherein the intermediate aggregation means are adapted to send images to the central aggregation means only on the request of said central aggregation means, or in association with said alarm.
4 . A system according to claim 1 , further including local aggregation means associated with one of the video detectors and including image analysis means for analyzing images from said video detector, and control means for controlling said video detector.
5 . A system according to claim 4 , wherein the local aggregation means also include interface means interfacing with at least one non-video sensor and they are adapted to transmit images from said video detector to the intermediate aggregation means in response to an event being detected by at least one of said non-video sensors.
6 . A system according to claim 5 , wherein the image analysis means of the local aggregation means are adapted to send an alarm to the intermediate aggregation means.
7 . A system according to claim 6 , wherein the alarm is forwarded to the central aggregation means by the intermediate aggregation means.
8 . A system according to claim 7 , wherein local aggregation means are connected to at least two intermediate aggregation means.
9 . A system according to claim 1 , wherein some intermediate aggregation means are put in reserve to enable the hierarchy of links between the local aggregation means, the intermediate aggregation means, and the central aggregation means to be configured dynamically.