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Stereoscopic video oriented frequency domain parallax coherent watermarking method

A stereoscopic video and watermarking technology, applied in the field of image processing, can solve the problems of poor robustness of video compression, etc., and achieve the effect of good robustness and resistance robustness

Inactive Publication Date: 2017-09-29
BEIJING UNIV OF TECH
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Problems solved by technology

However, the algorithm embeds the watermark in the spatial domain, which is less robust to video compression

Method used

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  • Stereoscopic video oriented frequency domain parallax coherent watermarking method
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  • Stereoscopic video oriented frequency domain parallax coherent watermarking method

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Embodiment Construction

[0039] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0040] Process flow of the present invention such as figure 1 As shown, it specifically includes the following steps:

[0041] Step 1, watermark embedding location selection.

[0042] This algorithm embeds the watermark in the DC (direct current) component of the luminance channel of the video frame after 4*4DCT transformation. In view of the "Blind detection for disparity-coherent stereo video watermarking" published by Baudry et al. on Proceedings of SPIE-The International Society for Optical Engineering in 2014, using the correlation between disparity and watermark, it can well deal with the problem of view synthesis, we The watermarking algorithm is also designed based on this principle (it is more clearly reflected in the process of watermark extraction). The difference is that in order to better deal with video compression attacks, the...

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Abstract

The invention discloses a stereoscopic video oriented frequency domain parallax coherent watermarking method. At a watermark embedding part, watermark information blocks of which value distribution is consistent with standard normal distribution is generated; copyright information can be selected as a key for scrambling the watermark information blocks; a video into which a watermark is about to be embedded is decoded into continuous sequence frames; 4*4 DCT is carried out on each frame; watermark information is repeatedly embedded into each sequence frame; and the sequence frames are recoded into the video. At a watermark detection part, a to-be-detected video is provided; I frames are extracted from the to-be-detected video; and the watermark information is determined by caring out statistics on the watermark energy of each I frame on each parallax. In the whole watermark detection process, the to-be-detected video is compared with a target watermark and no any other assistant information is required, namely the detection process is full blind. Compared with the existing method, the method has the advantage that on the basis of ensuring the invisibility and resisting a DIBR (Depth Image Based Rendering) attack, a video compression attack can be effectively resisted.

Description

technical field [0001] The invention belongs to the technical field of image processing, and relates to a frequency-domain parallax coherent watermarking method for stereoscopic video. Background technique [0002] Since the release of the 3D movie "Avatar" in 2009, stereoscopic video technology has received more and more attention and has been applied to more and more fields. However, the high economic value of stereoscopic digital video attracts pirates. Therefore, the copyright protection of stereoscopic digital video becomes an urgent problem to be solved. Digital watermarking is an important research direction of the content security branch in information security, and it is an effective method to realize anti-counterfeiting traceability and protect the copyright of digital products. The invention belongs to the category of robust digital hidden watermark and blind watermark. Hidden watermarking utilizes the characteristics of the human visual system and the redundan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/467H04N19/597H04N19/61
CPCH04N19/467H04N19/597H04N19/61
Inventor 马伟成聪鑫丁治明
Owner BEIJING UNIV OF TECH
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