A Robust Video Watermarking Method Against Geometric Attacks Based on SIFT

An anti-geometric attack and video watermarking technology, applied in image data processing, instruments, electrical components, etc., can solve the problem that cryptography no longer has a protective effect, achieve good geometric attack, small distortion, and simple effect

Inactive Publication Date: 2016-12-07
深圳市千方航实科技有限公司
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Problems solved by technology

[0003] The traditional means of copyright protection is password authentication technology. Cryptography technology can ensure the information security of digital works during the transmission process from the sender to the recipient. replication of

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  • A Robust Video Watermarking Method Against Geometric Attacks Based on SIFT
  • A Robust Video Watermarking Method Against Geometric Attacks Based on SIFT
  • A Robust Video Watermarking Method Against Geometric Attacks Based on SIFT

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Embodiment Construction

[0049] Such as figure 1 , 4 As shown, the present invention includes two parts of watermark embedding and watermark extraction.

[0050] The flow chart of the watermark embedding process is shown in image 3 , the steps are as follows:

[0051] Step 1: For each frame of video data, first convert to the Ycbcr color space and extract the Y component. If the original video is in yuv format, the Y component can be directly extracted.

[0052] Step 2: Perform two-dimensional discrete wavelet transform on the Y component, the wavelet base is Haar wavelet, and extract low frequency components.

[0053] Step 3: First divide the video into reasonable segments according to the size of the watermark information and the number of video frames. Assuming that the number of watermark information bits is m and the number of video frames is n, you can choose a number k that is an integer less than n / m, and then every k A frame is regarded as a segment. In order to facilitate processing when ...

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Abstract

A robust video watermarking method based on SIFT against geometric attacks. The watermark embedding process is as follows: (1) Express the video frame image in Ycbcr color space, perform a layer of two-dimensional DWT transformation on the Y component of the image, and select the wavelet base is the haar wavelet, and obtain the low-frequency components after DWT transformation; (2) take n frames as a group, perform SIFT feature point extraction on the low-frequency components obtained after (1) in the first frame of each group, and record the obtained feature point positions; ( 3) Add a change amount determined by the watermark information to the pixel value at the feature point position; (4) Perform DWT inverse transformation to obtain the Y component after embedding the watermark, and then convert from Ycbcr space to RGB space to complete the watermark embedding . (1) and (2) of the watermark extraction process are the same as the embedding process, and then predict the pixel value at the feature point according to the surrounding pixels to obtain the predicted difference value, which is obtained by comparing the predicted difference value with the set threshold value Embedded watermark information. The invention improves the robustness of the video watermarking method to geometric attacks, and has small distortion and simple processing.

Description

technical field [0001] The invention relates to a robust video digital watermarking method, in particular to a robust video watermarking method against geometric attacks based on SIFT (Scale-invariant feature transform). Background technique [0002] As we all know, digital multimedia has replaced the traditional analog form. With the continuous development of Internet communication technology, digital multimedia can be copied and disseminated conveniently and quickly, and the piracy and copyright disputes caused by this have become increasingly serious social problems. According to an estimate by the Recording Industry Association of America, the annual economic loss caused by piracy in the world is as high as 5 billion US dollars, and the American Film Industry Association estimates that piracy reduces the annual income of the US film industry by 2.5 billion US dollars. [0003] The traditional means of copyright protection is password authentication technology. Cryptograp...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N21/8358G06T1/00
Inventor 李清广陈真勇徐周川王美娟熊璋
Owner 深圳市千方航实科技有限公司
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