Monitoring system, monitoring method, and camera terminal

Abstract

A monitoring system in which the area to be monitored is fully covered by the imaging areas of camera terminals and imaging with a resolution corresponding to the monitoring importance level distribution is possible. The monitoring system for monitoring the area to be monitored by means of camera terminals (101, 101a) comprises a camera (106) having a function of adjusting its imaging area, a camera control unit (107) for controlling the adjustment of the imaging area of the camera (106), a communication IF (103) for communicating with another camera terminal (101a), and a processing unit (104) for controlling the camera through a camera control unit (107) according to the information on the imaging area of the camera terminal (101a) obtained through the communication IF (103) so that the difference between the weighted resolutions of the imaging areas of the camera terminal (101) and the camera terminal(101a) may be decreased and for thereby adjusting the resolution of the imaging area of the camera terminal (101).

Description

technical field [0001] The present invention relates to a surveillance system composed of a plurality of cameras that can adjust the photographing area by controlling panning, tilting, zooming, etc., and particularly relates to simultaneously photographing the entire surveillance target area at a resolution distributed according to the importance of surveillance Surveillance system for photography. Background technique [0002] In recent years, research and development on a surveillance system using a plurality of cameras mainly for surveillance purposes has been actively conducted. In the monitoring by multiple cameras, strive to meet the following two requirements: for the area to be monitored (surveillance target area) to maintain the state of the blind spot area as little as possible (requirement 1), further, to monitor the important areas in the target area area, to obtain as detailed photographic information as possible (requirement 2). [0003] Among conventional de...

AI Technical Summary

Problems solved by technology

[0015] More specifically, in the moving object detection and determination device of Patent Document 1, in order to eliminate blind spots, the imaging area of ​​the detection camera device is fixed, so when the number of moving objects increases and it is determined that the camera device cannot capture images with a predetermined resolution, the detection The camera device cannot flexibly respond to high-resolution photography

In addition, as shown in FIG. 2 , the judging camera device always repeatedly takes pictures of the area photographed by the detection camera device, so imaging resources such as CCD cannot be effectively utilized.

[0016] In addition, in the imaging device of Patent Document 2, it is disclosed that a plurality of cameras with the function of adjusting the vergence angle and the angle of view are used, and in order to create a panoramic image, the overlapped area is kept within a certain range, but it is not considered at all to share the responsibility of the multi-camera. Adjustment of shooting area and resolution of each camera when monitoring the entire surveillance area including multiple important surveillance areas with several moving objects

[0017] In addition, the intrusion monitoring device of Patent Document 3 only discloses that the field of view of the camera that takes pictures of the adjacent area is expanded to include the normal monitoring area of ​​the camera switched to the "tracking" mode. The operation of each camera is not considered

In this way, when expanding the field of view of one camera to include the normal monitoring area of ​​multiple cameras in "tracking" mode, the resolution will be lowered more than necessary.

[0018] In addition, as in the monitoring system of Patent Document 4, since the place where the image is captured or the zoom value is switched according to the purpose, when the camera orientation or zoom is preset for each camera, the preset The setting operation is very complicated

In addition, for moving objects that move irregularly, it is not possible to pre-set

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