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Stereoscopic video robust watermarking method based on tensor decomposition

A technology of stereoscopic video and tensor decomposition, applied in image watermarking, image data processing, instruments, etc., can solve problems such as watermark test without test extraction

Pending Publication Date: 2020-02-25
COLLEGE OF SCI & TECH NINGBO UNIV
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  • Application Information

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Problems solved by technology

Although the above two methods have a certain degree of robustness, neither of these two methods has tried to extract the watermark after the video is encoded by HEVC video.

Method used

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  • Stereoscopic video robust watermarking method based on tensor decomposition
  • Stereoscopic video robust watermarking method based on tensor decomposition
  • Stereoscopic video robust watermarking method based on tensor decomposition

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Embodiment Construction

[0030] The present invention will be described in further detail below in conjunction with the embodiments of the drawings.

[0031] The present invention proposes a robust watermarking method for stereo video based on tensor decomposition, which includes two parts: watermark embedding and watermark extraction.

[0032] Such as Figure 1a As shown, the specific steps of the watermark embedding part are:

[0033] Step 1_1: Mark the left-view color video and the right-view color video of the original stereo video as C L,org And C R,org , Will C L,org The luminance component of is denoted as Y L,org , Will C R,org The luminance component of is denoted as Y R,org ; Among them, C L,org The left view point in the color image and C R,org The width of the right-view color image in the middle is P and the height is Q. Both P and Q can be 2 n Divide evenly, 2≤n≤6, generally the value of n is 2 or 3 or 4. In this embodiment, n=2, C L,org The total number of frames of the left-view color imag...

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Abstract

The invention discloses a stereoscopic video robust watermarking method based on tensor decomposition. A watermark is embedded into the watermark embedding end, the brightness components of the left viewpoint color video and the right viewpoint color video are converted into third-order tensors; tensor decomposition is carried out on the third-order tensor; the two-dimensional matrix representations of the two feature maps containing the main energy are synthesized into a three-dimensional matrix in sequence; the three-dimensional matrix is converted into a three-order tensor; tensor decomposition is carried out on the third-order tensor; non-overlapping sub-image block processing is carried out on the obtained feature map containing the main energy, to-be-embedded blocks are determined,a coefficient in a left singular matrix of each to-be-embedded block is modified according to each bit in an original binary watermark sequence to obtain a corresponding watermark-containing block, and inverse operation is carried out on the watermark-containing block to finally obtain a watermark-containing three-dimensional video; at a watermark extraction end, image block processing is performed in the same way, to-be-extracted blocks are determined according to the to-be-embedded blocks, and watermark information are extracted from each to-be-extracted block. The method has the advantages of being good in robustness and imperceptibility.

Description

Technical field [0001] The invention relates to a stereo video watermarking technology, in particular to a stereo video robust watermarking method based on tensor decomposition. Background technique [0002] Stereoscopic video will be an important development direction of multimedia technology in the future. Stereoscopic video may need to be compressed and decoded during transmission and may be attacked by some harmful copyrights. Therefore, the copyright of stereoscopic video must be protected. The digital watermarking technology is one of the ways to effectively solve this problem. [0003] At present, the research on digital watermarking technology for stereoscopic video is still in the preliminary stage of development. Digital watermarking technology for stereoscopic video can be divided into two categories: digital watermarking technology for stereoscopic video in the original domain and digital watermarking technology for stereoscopic video in the compressed domain. . Liu e...

Claims

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Application Information

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IPC IPC(8): G06T1/00
CPCG06T1/005G06T2201/0065G06T2201/0051
Inventor 骆挺张芳燕徐海勇宋洋
Owner COLLEGE OF SCI & TECH NINGBO UNIV
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