Method for embedding multiple watermarks in video based on three-dimensional DWT (Discrete Wavelet Transform) and DFT (Discrete Fourier Transform)

A three-dimensional, multiple technology, applied in the direction of digital video signal modification, television, electrical components, etc., can solve the problem of difficulty in implementation, achieve the effect of wide range of use, strong anti-geometric attack ability, strong anti-conventional attack ability

Inactive Publication Date: 2012-06-20
HAINAN UNIVERSITY
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For extracting video data features based on 3D wavelet transform, embedding multiple watermarks in digital video, and requiring the embedded multiple watermarks to have a strong ability to resist geometric attacks, it is difficult to implement, and has not been reported yet.

Method used

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  • Method for embedding multiple watermarks in video based on three-dimensional DWT (Discrete Wavelet Transform) and DFT (Discrete Fourier Transform)
  • Method for embedding multiple watermarks in video based on three-dimensional DWT (Discrete Wavelet Transform) and DFT (Discrete Fourier Transform)
  • Method for embedding multiple watermarks in video based on three-dimensional DWT (Discrete Wavelet Transform) and DFT (Discrete Fourier Transform)

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Embodiment Construction

[0083] The present invention will be further described below in conjunction with accompanying drawing.

[0084] First generate 1000 sets of independent binary pseudo-random sequences (values ​​are +1 or 0) each set of sequence length is 128bit, in these 1000 sets of data, the inventor here selects three sets as a large watermark to be embedded, each set As a sub-watermark, its sequence length is 128bit, so the total length of the binary sequence is: 128x3=384bit. In the experiment, the 300th, 500th, and 700th groups are used specifically. A frame of the video is shown in Figure 4(a), and the output of the watermark detector is shown in Figure 4(b) when the frame image is not disturbed. The size of the video data used in the experiment is 300x300x6), and the original video frame is expressed as F(i, j, k), where 1≤i, j≤300; 1≤k≤6, corresponding to the coefficient matrix of the three-dimensional DWT-DFT transformation For DF(i, j, k), considering the robustness and the capacity...

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Abstract

The invention relates to a method for embedding multiple watermarks in a video based on three-dimensional DWT (Discrete Wavelet Transform) and DFT (Discrete Fourier Transform). The method firstly performs the process of embedding multiple watermarks and comprises the following steps of: (1) performing three-dimensional wavelet transform and three-dimensional global Fourier transform on an original video, and extracting a geometric attack resisting feature vector from transform coefficients; (2) performing Hash function operation on the feature vector and multiple sub-watermarks to be embedded to obtain a corresponding binary logic sequence, and storing the binary logic sequence in a third party; the method then performs the process of extracting multiple watermarks and comprises the following steps of: (3) performing three-dimensional wavelet transform and three-dimensional global Fourier transform on a video section to be detected, and extracting a feature vector of the video section to be detected from a transform domain; and (4) extracting multiple sub-watermarks by utilizing the characteristics of the Hash function and the binary logic sequence stored in the third party. The method provided by the invention can perform the process of embedding watermarks without affecting the original video, has stronger robustness and can resist geometric attack and conventional attack, thereby better protecting the copyright of the video.

Description

technical field [0001] The invention belongs to the field of multimedia signal processing, and relates to a method for embedding multiple digital watermarks in video based on discrete three-dimensional wavelet transform (DWT) and discrete three-dimensional Fourier transform (DFT), specifically a method based on three-dimensional DWT and DFT in A method for embedding multiple watermarks in videos. Background technique [0002] With the development of multimedia technology, there are more and more video products, and the copyright protection of video products needs to be solved urgently. As an intellectual property protection method for video data, video watermarking is receiving more and more attention. Video watermarking can be understood as adding information to the subjective and objective time redundancy and space redundancy of digital video carriers, which will not affect the video quality, but also achieve digital watermarking technology for copyright protection and co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/26H04N7/30H04N19/467H04N19/62H04N19/625H04N19/63
Inventor 李京兵杜文才魏应彬
Owner HAINAN UNIVERSITY
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