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Method and system for compressing monitoring photograph

A technology of monitoring system and compression method, applied in closed-circuit television systems, electrical components, digital video signal modification, etc., can solve problems such as confusion, blurred judgment of vehicle information and passenger information, and reduced resolution of vehicle photos.

Inactive Publication Date: 2014-02-19
ZHEJIANG UNIVIEW TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method makes the resolution of the vehicle photo smaller, and the vehicle information and passenger information in the photo may become blurred, which will cause trouble for subsequent research and judgment.

Method used

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  • Method and system for compressing monitoring photograph
  • Method and system for compressing monitoring photograph

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] S11. The monitoring front-end device captures a snapshot of the moving object to obtain a snapshot of the moving object.

[0022] There are many ways to determine a moving object. For example, an object passing a tripwire can be determined as a moving object. The trip wire can be a ground sense coil, a video trip wire; the moving object is usually a vehicle in the electric police and bayonet. Capturing the moving objects that trigger the trip wire is a function supported by the current mainstream monitoring front-end equipment. Therefore, the details of the specific implementation will not be repeated here. figure 1 A photo of the vehicle captured for the monitoring front-end equipment.

[0023] S12. The monitoring front-end device extracts the contour information of the moving object, and sends the contour information and the snapshot of the moving object to the storage device.

[0024] The contour information of a moving object can be represented by the coordinates...

Embodiment 2

[0036] In some application scenarios, the user may also need to view the photos captured by the camera, that is, in addition to focusing on the moving objects, the user may also need to pay attention to the background information, so the second embodiment is based on the first embodiment, and the storage device further saves the background image . However, in order to make full use of the limited storage space, certain improvements need to be made when saving the background image. The background picture is the remaining picture after the captured photo is cut out of the moving object. image 3 is an example of a background image. The implementation process is further described in detail below.

[0037] Please refer to Embodiment 1 for S21-S25.

[0038] S26. Save the background picture obtained by extracting the moving object picture from the snapped photo, and further save the corresponding relationship between the moving object picture and the background picture and the po...

Embodiment 3

[0044] For the calculation of the common background picture, in addition to the comprehensive calculation method in step 27, a stepwise approximation method can also be used for calculation. The following is further described in detail through Example 3.

[0045] Please refer to Embodiment 1 for S31-S35.

[0046] S36. Cut out the picture of the moving object from the captured photo to obtain the background picture, and save the position information of the picture of the moving object in the background picture.

[0047] S37. Use the background picture to update the current public background picture to obtain a new public background picture, and use the new background picture as the current public background picture; the public background picture is initially 0.

[0048] S38. Save the corresponding relationship between the moving object picture and the updated public background picture.

[0049] It can be seen from the above implementation process that the stepwise approximati...

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Abstract

The invention provides a method for compressing a monitoring photograph. The method comprises the steps that firstly, a monitoring front-end device takes a candid photograph of a moving object to obtain the candid photograph of the moving object; secondly, the monitoring front-end device extracts the outline information of the moving object and sends the outline information and the candid photograph of the moving object to a storing device; thirdly, the storing device receives and stores the moving object candid photograph and the moving object outline information which are sent by the monitoring front-end device; fourthly, the storing device starts the compression for the candid photograph of the moving object according to the preset strategy; sixthly, the storing device cuts out the picture of the moving object from the candid photograph of the moving object according to the outline information of the moving object, stores the cut-out picture and deletes the candid photograph. According to the technical scheme, the purpose of compressing the candid photograph can be achieved, and meanwhile the quality of the image with the effective content of the photograph is not lowered.

Description

technical field [0001] The invention relates to the technical field of video monitoring, in particular to a monitoring photo compression method and system. Background technique [0002] The number of vehicle photos received by the checkpoint and electric police system is very large. According to 100 checkpoints, each checkpoint passes 10,000 vehicles per day, and the captured photos of each vehicle are 0.2MByte, so the size of the vehicle photos generated in 3 months is: 100*10000*0.2*90=18,000,000MByte=18T . Photos of these vehicles are stored on pre-programmed storage devices. When the storage space used by the vehicle photos reaches the threshold, the bayonet electric police system will clean up the storage space and clear the old vehicle photos so as to free up storage space for new vehicle photos. But there is a problem in this way. Once the clearing is started, the old vehicle photos will be deleted from the storage space and cannot be queried later. So how to incr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/18H04N19/172H04N19/46
Inventor 黄军
Owner ZHEJIANG UNIVIEW TECH CO LTD
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