Distance measuring method in camera monitoring system

Abstract

The invention relates to a distance measuring method in a camera monitoring system, belonging to the field of video monitoring. The method comprises the steps as follows: (1) shooting direction and optical zoom of the camera are adjusted so as to lead the present position and the taken area of the monitored object in the scene to meet the requirements of distance measuring; (2) focusing regulation is carried out on the monitored object so as to lead the image of the monitored object in the camera to be clearly focused; (3) zoom parameters and focus parameters of the camera are read out and the distance between the camera and the monitored object is calculated according to the parameters. The invention can realize the function of measuring the distance between the camera and the monitored object on the basis of the relationship among self-zooming, focusing and distance of a zoom-varying camera in shooting, thus saving the design and manufacturing costs of the camera monitoring system. The method is easy to use and widely applicable to camera monitoring systems employing zoom-vary cameras.

Description

technical field [0001] The invention belongs to the field of video surveillance, in particular to a ranging method in a camera surveillance system. Background technique [0002] Camera surveillance is the most extensive surveillance method in the field of security surveillance. The camera monitoring system can record the scene situation, and the monitoring personnel can monitor the scene situation through the display device without on-site patrol. One monitoring personnel can monitor multiple monitoring sites in real time at the same time. The video information monitored by the camera monitoring system is generally obtained through the monitoring terminal installed in the monitoring site. The camera in the monitoring terminal collects the scene picture and sends it back to the control center for the monitoring personnel to monitor the scene, with an intuitive display , strong real-time and so on. However, the video information captured by the camera is two-dimensional info...

AI Technical Summary

Problems solved by technology

In order to be able to obtain this distance information, many video surveillance systems have added auxiliary ranging devices that use laser or ultrasonic methods to measure distances, or installed monitoring terminals with built-in ranging functions. Added, the cost of the camera monitoring system is greatly increased, and it also makes the circuit and structural design of the monitoring system very complicated

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