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Visual ranging method of fixed focus monitoring camera

A technology of monitoring camera and ranging method, which is applied in the field of visual ranging to achieve a simple effect

Inactive Publication Date: 2009-07-01
TIANJIN SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no method of distance measurement through the monitoring camera to measure the distance to the monitored target.

Method used

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  • Visual ranging method of fixed focus monitoring camera
  • Visual ranging method of fixed focus monitoring camera
  • Visual ranging method of fixed focus monitoring camera

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Experimental program
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Embodiment Construction

[0009] The present invention will be described in detail below with reference to the accompanying drawings. The method includes: after the incident image is reflected by the reflector 1 fixed on the inner wall of the lens end, its image is connected to the reflector 2 fixed on the inner wall of the lens end and with a scale reference line. When the scale images on the overlay are superimposed, start to adjust the camera field of view so that the bottom edge of the image of the monitored object (such as a human body with a height of 1.70m) on the scene is aligned with the scale reference line on the reflector 2. At this moment, the monitored object The scale value aligned with the top edge is the distance between the camera and the monitored object on site.

[0010] In this method, a set of reflectors 1 and 2 are fixedly installed on the inner wall of the end of the camera lens. The reflector 2 has a scale with a scale reference line, such as figure 1 Shown. The reflector inside t...

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Abstract

The invention relates to the electronic monitoring technique, in particular to a visual measurement method for fixed focus monitoring cameras, which utilizes cameras to remotely measure a on-the-spot object distance. The visual measurement method comprises steps: after an incident image is reflected by a reflector fixed on the inner wall at the tail end of a lens, the incident image is superposed with a scale image on the reflector which is fixed at the tail end of the lens and is provided with a scale datum line, thereby adjusting visual field of the camera to enable the bottom edge of an image of a monitored object on the spot to be aligned to the scale datum line on the reflector, by now, the scale value aligned to the top edge of the monitored object is a distance between the camera and the monitored object on the spot. The visual measurement method has the advantages of easy realization, and after using the visual measurement method, monitoring staff can directly read the measurement results in a remote monitor, thereby the visual measurement method can be widely applied to various monitoring systems.

Description

Technical field [0001] The invention relates to electronic monitoring technology, in particular to a visual distance measurement method in a fixed-focus monitoring camera that uses a camera to remotely measure the distance of an on-site target. Background technique [0002] With the rapid development of network and electronic technology, video surveillance has entered the era of remote monitoring, which enables monitoring personnel to sit in the monitoring room to observe the remote field environment, but current surveillance cameras can only provide single field information, such as: Picture, sound, etc. With the continuous expansion of the application range of surveillance cameras, the types of environmental parameters that the surveillance cameras are required to provide continue to increase. At present, there is no method of distance measurement to realize the measurement of the distance to the monitored target through a surveillance camera. Summary of the invention [0003]...

Claims

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Application Information

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IPC IPC(8): G03B13/20
Inventor 徐海涛王炳强李承基
Owner TIANJIN SAMSUNG ELECTRONICS CO LTD