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Method for video compression based on line clipping

A technology of video concentration and line cutting, applied in digital video signal modification, electrical components, image communication, etc., to achieve the effect of reducing the number of frames, enhancing the value of real-world applications, and maintaining integrity

Active Publication Date: 2014-04-30
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] (1) Storage space: Since it is a surveillance video, the camera must be monitored all the time, resulting in the generation of endless surveillance videos every minute and every second, which puts a huge pressure on storage

Method used

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  • Method for video compression based on line clipping
  • Method for video compression based on line clipping
  • Method for video compression based on line clipping

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Embodiment Construction

[0041] If use the present invention to realize video concentration for a section of video, can adopt figure 1 The method described is implemented. The specific implementation method is:

[0042] First, use existing methods (such as [1,2]) to realize the extraction of video tubes and generate video masks.

[0043] Then the video mask and the video tube are transposed to obtain two new cuboids, where the x-t plane before the transposition faces the user.

[0044]Generate energy maps based on information such as optical flow and gradients in the x-t plane of the video tube. Then, the transposed video tube and video mask are clipped synchronously based on the energy map. In this way, pixels with large changes in the time domain will be retained and pixels with small optical flow values ​​will be cut. Namely: After applying line clipping on each tube, smaller motions will be more condensed, while larger motions will be preserved.

[0045] During online clipping, the current D ...

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Abstract

The invention belongs to the technical field of video compression, in particular to a method for video compression based on line clipping. Video compression indicates that compression is conducted on a video in terms of time, details in the original video are described as many as possible in a short time, redundant information on a video time domain is removed, and therefore the capacity for rapidly browsing an endless surveillance video is given to a user. According to the method, video Tubes are clipped through line clipping so that the length of the video in the time domain can be reduced; in the clipping process, an energy image of the video Tubes is updated through a light stream and according to an analysis result of the energy image of the video Tubes, a clipping stopping criterion is set, so that according to each Tube, on the premise that the consistency of the video is guaranteed, the lasting time of each video Tube is compressed as much as possible, and finally the effective video compression effect is obtained. An experimental result shows that on the basis that object movement description is well kept, compression of the video in the time domain can be effectively achieved.

Description

technical field [0001] The invention belongs to the technical field of video concentration, and in particular relates to a video concentration method. Background technique [0002] Since the last century, tens of millions of surveillance cameras have been deployed at transportation hubs such as railway stations, airports, and various traffic intersections, and a large number of surveillance videos are constantly being produced. In the digital age, the number of surveillance videos has grown explosively. On the streets of the city, every camera is recording 24 hours a day, and many surveillance videos have never been watched at all. The length of the video also brings great difficulties to backtracking. As surveillance cameras become cheaper and easier to deploy, surveillance networks continue to become denser, making it more difficult to monitor people and requiring more storage space. Therefore, various algorithms born to solve various inconveniences caused by monitoring...

Claims

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Application Information

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IPC IPC(8): H04N19/51H04N19/43
Inventor 颜波薛向阳李可王伟祎
Owner FUDAN UNIV
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