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Video motion compensation frame rate up-conversion forensics method based on noise level estimation

A noise level and motion compensation technology, applied in the direction of digital video signal modification, electrical components, image communication, etc., can solve the problem of lack of safe and reliable video anti-counterfeiting technology, and achieve the effect of solving anti-counterfeiting problems, good use effect and easy operation.

Inactive Publication Date: 2018-02-16
XINYANG NORMAL UNIVERSITY
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Problems solved by technology

However, in terms of video authentication technology, there is still no safe and reliable video anti-counterfeiting technical means for the identification of motion compensation frame rate up-conversion operation

Method used

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  • Video motion compensation frame rate up-conversion forensics method based on noise level estimation
  • Video motion compensation frame rate up-conversion forensics method based on noise level estimation
  • Video motion compensation frame rate up-conversion forensics method based on noise level estimation

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Embodiment Construction

[0013] The specific implementation of the present invention will be described in detail below in combination with specific situations.

[0014] In concrete implementation, the present invention is realized by the following steps:

[0015] (1) Calculate the Gaussian distribution standard deviation of each frame of the video to be identified to characterize the noise level, and obtain the standard deviation sequence, the method is: extract the luminance component f of the t-th frame video frame t , t=1,2,...,T, T is the total frame number of the video sequence, and the highest frequency subband coefficient of the first-level wavelet decomposition is calculated by formula (1):

[0016] Formula 1)

[0017] Among them, (m, n) is the coordinate of the pixel position, × indicates the convolution operation, the even index n=2k, m=2k, k≥0, which means filtering and subsampling by 2 when calculating the convolution at the non-negative position, and h ψ They are finite-length low-...

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Abstract

The invention relates to a video motion compensation frame rate up-conversion method based on noise level estimation, which can effectively solve the problem of video security and anti-counterfeiting in the video authentication technology for motion compensation frame rate up-conversion operation. The frame characterizes the standard deviation of the Gaussian distribution of the noise level to obtain the standard deviation sequence; then perform Fourier transform on the standard deviation sequence in turn to obtain the Fourier spectrum, perform high-pass filtering on the Fourier spectrum, and perform significance enhancement processing to extract the peak of the spectrum and separate it from Abnormal spike set; finally, the credibility is calculated by using the spectrum spike and the abnormal spike subset, and the threshold is set according to the credibility. When the credibility is greater than the threshold, the video to be identified is a fake video edited by motion compensation frame rate up-conversion , otherwise it is the original video, the method of the present invention is novel and unique, easy to operate, good in use effect, can effectively solve the anti-counterfeiting problem of the video, and ensure the safety of video motion compensation frame rate up-conversion.

Description

technical field [0001] The invention relates to multimedia information security, in particular to a video motion compensation frame rate up-transfer evidence collection method based on noise level estimation. Background technique [0002] With the popularization of social networks and the cheapness and portability of digital cameras, people increasingly hope to take pictures of their lives and upload them to the Internet to share with relatives and friends. The amount or traffic can generate income for video websites and obtain economic returns. High-definition video requires a high frame rate (temporal resolution), which can obtain good subjective visual quality and attract more attention from netizens. Therefore, photographers often use cheap webcams to obtain low-frame-rate videos, and then use video editing software to enhance them. frame rate to meet the high-definition bit rate. The high-definition video processed through frame rate up-transfer is aimed at defrauding...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/51H04N19/117H04N19/80
Inventor 李然马行坡郭华平刘宏兵
Owner XINYANG NORMAL UNIVERSITY
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