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Method and device for analyzing video definition

A technology of video clarity and analysis method, applied in the field of image processing, can solve the problems of monitoring omission, failure to detect in time, labor-intensive and other problems, and achieve the effect of preventing missing monitoring, ensuring reliability, and ensuring accuracy.

Active Publication Date: 2010-01-06
VIMICRO ELECTRONICS CORP
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AI Technical Summary

Problems solved by technology

The existing analysis of clarity depends entirely on the attention and sense of responsibility of the staff. It is indeed labor-intensive to find that a monitor has abnormal video clarity on a TV wall full of monitoring displays, and it may not be timely due to human factors. Discovery or failure to discover, there will inevitably be monitoring omissions
In this way, after the abnormality occurs, if the equipment cannot be maintained in time, the monitoring video cannot clearly record the relevant scenes due to the abnormal video definition, which greatly reduces the credibility of the video monitoring system.

Method used

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  • Method and device for analyzing video definition

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Embodiment Construction

[0033] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and examples.

[0034] figure 1 It is a flow chart of the video definition analysis method of the present invention, such as figure 1 shown, including:

[0035] Step 100: Extract video images.

[0036] A video image includes two parts, a foreground image and a background image. The foreground image is constantly changing, while the update speed of the background image is usually very slow.

[0037] The video image does not need to be extracted every frame, for example, a time interval can be preset, and the time interval can be set to different values ​​according to different places, for example, 5 seconds as an interval.

[0038] When the extracted video image is a color image, it is also necessary to grayscale the extracted image first, and the specific implementa...

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Abstract

The invention discloses a method and a device for analyzing video definition. The method for analyzing video definition ensures the accuracy of a condition whether the video image has definition anomaly or not through analyzing the frequency of a video image and by using energy sum of high-frequency components as a definition coefficient and a slow-change background as a definition judging reference in the video image; moreover, because the working personnel can obtain information whether a definition anomaly condition appears in time, a video image device is regulated or maintained in time, a monitor miss condition is prevented, and thereby, the reliability of the video image device is ensured.

Description

technical field [0001] The invention relates to image processing technology, in particular to a video definition analysis method and device. Background technique [0002] Video surveillance systems are widely used in various fields of society, such as transportation, banking, military, warehouses, public security, communities, office buildings, hotels, public places, shopping malls, etc. [0003] Abnormal video clarity is mainly due to improper focus, lens damage, or foreign object occlusion, which reduces the image clarity of the main part of the field of view. [0004] At present, it is found whether the clarity of the image is abnormal by watching the surveillance video image manually. The existing analysis of clarity depends entirely on the attention and sense of responsibility of the staff. It is indeed labor-intensive to find that a monitor has abnormal video clarity on a TV wall full of monitoring displays, and it may not be timely due to human factors. Whether it i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/18G06T7/00
Inventor 谌安军
Owner VIMICRO ELECTRONICS CORP
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