Distance measuring method in camera monitoring system

A distance measuring method and monitoring system technology, applied in optics, focusing devices, cameras, etc., can solve the problems of increased cost of camera monitoring system, complicated circuit and structural design of monitoring system, etc., to save development and design cost, save equipment cost, The effect of reducing complexity

Inactive Publication Date: 2009-06-03
TIANJIN YAAN TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • Distance measuring method in camera monitoring system
  • Distance measuring method in camera monitoring system
  • Distance measuring method in camera monitoring system

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Experimental program
Comparison scheme
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Embodiment Construction

[0025] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0026] The ranging method in the camera monitoring system includes the following steps:

[0027] Step 1: Adjust the shooting direction and optical zoom of the camera, so that the position and area of ​​the monitoring object in the shooting picture meet the requirements of distance measurement, that is: the monitoring object is located in the center of the camera shooting screen, and the camera shooting screen Take more than a quarter of the total screen or adjust the optical zoom to the maximum.

[0028] In this step, the process of adjusting the shooting direction of the camera and the optical zoom needs to be adjusted repeatedly. The adjustment process is as follows: figure 2 As shown, through repeated adjustment, the position and the area occupied by the monitoring object in the shooting picture meet the requirements of distance measurem...

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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...

Claims

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Application Information

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IPC IPC(8): G03B13/20G03B13/36
Inventor 权立伟
Owner TIANJIN YAAN TECH CO LTD
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