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Video fingerprint extraction and retrieval method

A technology of video fingerprinting and extraction method, applied in multimedia data retrieval, special data processing application, multimedia data query and other directions, can solve the problems of difficult retrieval, labor and time consumption, etc., and achieve the effect of video management and retrieval.

Active Publication Date: 2015-07-29
成都华栖云科技有限公司
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Huge video data makes video management and retrieval difficult
Traditional video management and retrieval needs to manually add various description information to each video, which is labor-intensive and time-consuming

Method used

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Embodiment Construction

[0029] The technical solutions of the present invention will be described in further detail below with reference to the accompanying drawings, but the protection scope of the present invention is not limited to the following.

[0030] Such as figure 1 As shown in the video fingerprint extraction method, it includes the following steps:

[0031] S101: Decode the video to obtain the YUV information of each frame of image, and separate the Y component;

[0032] S102: Use the Sobel operator to calculate the horizontal (X) and vertical (Y) gradient information of each pixel of the Y component of each frame of image. The template of the Sobel operator is as follows figure 2 Shown

[0033] S103: Retaining the first 10% of the points with the largest absolute value of the gradient for the horizontal and vertical gradient information of the single frame image;

[0034] S104: Divide each frame of image into N*N regions, such as image 3 As shown, the value of N can be changed according to applic...

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Abstract

The invention discloses a video fingerprint extraction and retrieval method, which is used for extracting the texture information from an image sequence in a video, so as to obtain the marking information indicating the difference of the video from other videos. The video fingerprint extraction method comprises the following steps: the video is decoded to obtain YUV data of each image; the Y component of each image is extracted, the gradient information of the Y component is extracted through the Sobel operator, and the first 10 percent of points with the maximum gradient range in the horizontal (X) direction and the first 10 percent of points with the maximum gradient range in the vertical (Y) direction are respectively reserved; each video frame image is divided into N*N areas, the gradient distributions in the forward and the backward X directions as well as in the forward and the backward Y directions in each area are obtained through statistics, and the gradient distributions in all the areas are combined to form a normalized column diagram. The video fingerprint retrieval method comprises the following steps: a fingerprint sequence of a template video is slide on a fingerprint sequence of a video to be inquired about, and a cross correlation coefficient is calculated to find out a matching position with the maximum similarity. The invention can greatly simplify the video contents, and effectively improve the video retrieval efficiency.

Description

Technical field [0001] The invention relates to a video fingerprint extraction and retrieval method. Background technique [0002] Nowadays, information is expanding rapidly, especially the proportion of digital media information of video owners is increasing. The huge video data makes the management and retrieval of the video difficult. Traditional video management and retrieval need to manually add various descriptions to each video, which consumes labor and time. Summary of the invention [0003] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a video fingerprint extraction and retrieval method, which can automatically extract characteristic information from the video to form a fingerprint, so that the video management and retrieval are simple, convenient and efficient. [0004] The purpose of the present invention is achieved through the following technical solutions: a video fingerprint extraction method, which includes the fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/30
CPCG06F16/43
Inventor 刘盾郑雪梅
Owner 成都华栖云科技有限公司
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