Method for compressing video image and video monitoring system

A video surveillance system and video image technology, applied in the field of video processing, can solve problems such as poor image quality in hotspot scenes, achieve the effect of reducing the size of the code stream and increasing the compression ratio

Active Publication Date: 2013-04-17
VIMICRO ELECTRONICS CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for compressing video images and a video monitoring system, which can preferentially allocate coding resources to images with monitoring events, and solve the problem of poor image quality in hot scenes caused by the average distribution of coding resources in the prior art technical issues

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  • Method for compressing video image and video monitoring system
  • Method for compressing video image and video monitoring system
  • Method for compressing video image and video monitoring system

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Embodiment Construction

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the specific embodiments will be described in detail below in conjunction with the accompanying drawings.

[0030] In the embodiment of the present invention, a weight is assigned to each possible pan / tilt posture in the video surveillance system, which represents the feeling that occurred within the monitoring field of view corresponding to the pan / tilt posture in the past period of time. Frequency information of events of interest. The video surveillance system will dynamically adjust the compression parameters of the pictures pointed to by different postures based on this information. In the field of view where events of interest frequently occur, the compression ratio of the image can be reduced to make the image quality better; for the field of view where events of interest rarely occur, the compression ratio of the image can be increased, and the need to b...

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Abstract

The invention provides a video image compression method and a video monitoring system. The method comprises: step 1, a gesture weight value is correspondingly allocated to each gesture of a pan tilt of the video monitoring system, each gesture weight value represents the frequency of a monitored event in a monitoring visual field range of the corresponding gesture; step 2, image compression is carried out on each image which is shot by a camera on the pan tilt according to the gesture weight value which is corresponding to the gesture of the pan tilt during the shooting of the image. The invention can priorly allocate coded resources to the images which shoot the monitored events, thereby solving the technical problem of poor image quality of the hot scene images caused by even distribution of the coded resources of the prior art.

Description

Technical field [0001] The present invention relates to video processing technology, in particular to a method for compressing video images and a video monitoring system. Background technique [0002] The main function of the video surveillance system is to assist the security system to monitor and record various scenes, and to provide monitoring and recording methods for the operation of banks, fire protection, and various field equipment and personnel activities. The currently commonly used surveillance systems mainly include a camera part and a monitoring part. The camera part is generally installed on site, and it includes cameras, lenses, protective covers, brackets and electric pan-tilts. Its function is to take a picture of the surveillance area and convert it into an electrical signal. With the rotation of the electric pan-tilt, the camera on it can take pictures of different angles. [0003] In the existing video surveillance system, no matter what angle the camera rota...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N7/26H04N19/20
Inventor 王浩
Owner VIMICRO ELECTRONICS CORP
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