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Method and apparatus for comparing videos

A technology for video and target video, applied in the fields of digital video signal modification, special data processing applications, instruments, etc., can solve the problem of time-consuming video ordinal signature, achieve high-efficiency video duplication detection, reduce computing costs, and improve processing time.

Inactive Publication Date: 2014-02-12
ALCATEL LUCENT SAS
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  • Description
  • Claims
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Problems solved by technology

Sequential comparison of video ordinal signatures is a time-consuming process

Method used

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  • Method and apparatus for comparing videos
  • Method and apparatus for comparing videos
  • Method and apparatus for comparing videos

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Embodiment Construction

[0027] refer tofigure 1 , the video that will be involved in the duplicate video detection procedure consists of multiple frames. In step 1, each frame in the video is divided into N1xN2 blocks. In step 2, the average intensity value corresponding to each block is calculated. Video modification techniques, such as histogram equalization, can adjust the mean value of intensities corresponding to the entire frame to the median grayscale value. In this case, the temporal changes of the entire video will be flattened, making it unsuitable for extreme point-based data compression. This problem is avoided by exploiting the temporal intensity changes from the divided blocks, since each block is able to preserve the changes in intensity changes in the divided subsections.

[0028] In step 3, significant minima and maxima are extracted from the temporal changes corresponding to the mean intensity value of each block. In step 4, the main rise / fall is obtained from the extracted minim...

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Abstract

In a method of comparing a query video and a target video, frames of the query video and frames of the target video arc partitioned into blocks. The mean intensity value is calculated for each block. Minima and maxima values are extracted from temporal changes of the mean intensity values for each block. Inclines and declines are obtained from the minima and maxima values. The inclines and declines are used in determining if alignment exists between the query video and the target video.

Description

technical field [0001] The present invention relates to a method and apparatus for comparing videos. Background technique [0002] In video hosting websites such as YouTube, Google Video, and Yahoo! Video, video content can be uploaded onto the website by users and made available to others through search engines. It is believed that current web video search engines provide a list of search results ranked according to their relevance score based on a particular textual query entered by a user. The user must then consider the results in order to find the video or videos of interest. [0003] Since it is easy for a user to upload a video to a hosting site, obtain the video, and redistribute the video after making some modifications, there is potentially a lot of duplicate or near-duplicate content in the video search results. Such reproductions will be deemed "substantially identical" by users based on their overall content and subjective impression. For example, the copied ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/30
CPCG06F17/30799G06F16/7847H04N19/33H04N19/54G06F16/2457
Inventor Y·任F·常T·L·伍德
Owner ALCATEL LUCENT SAS
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