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Color image robust watermarking method based on tensor singular value decomposition

A singular value decomposition and color image technology, which is applied in image watermarking, image enhancement, image analysis, etc., can solve the problems of not fully utilizing the close relationship and not being able to better protect the copyright of color images

Active Publication Date: 2019-08-30
杭州电子科技大学上虞科学与工程研究院有限公司
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Problems solved by technology

The above color image watermarking method only embeds the watermark into one of the channels, and does not make full use of the close relationship between the three channels in the color image, resulting in the inability to better protect the copyright of the color image

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  • Color image robust watermarking method based on tensor singular value decomposition
  • Color image robust watermarking method based on tensor singular value decomposition
  • Color image robust watermarking method based on tensor singular value decomposition

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Embodiment Construction

[0038] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0039] A color image robust watermarking method based on tensor singular value decomposition proposed by the present invention, which includes two parts: watermark embedding and watermark extraction;

[0040] Such as Figure 1a As shown, the specific steps of the watermark embedding part are:

[0041] Step 1_1: Denote the original color image with width M and height N as I org , will I org The R channel image, the G channel image, and the B channel image are correspondingly marked as I R , I G , I B; Denote the grayscale watermark image with width A and height B as W; then perform singular value decomposition on W to obtain the principal component of W, which is denoted as J; where 1R , I G , I B Both have width M and height N, and J have width A and height B.

[0042] In this embodiment, in step 1_1, perform singular value decompositio...

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Abstract

The invention discloses a color image robust watermarking method based on tensor singular value decomposition, which comprises the following steps of extracting the LL sub-bands of three channels of an original color image in watermark embedding; performing the block processing on an approximate image synthesized by the three LL sub-bands; performing T-SVD on the image block to obtain a diagonal tensor; embedding a pixel value of a pixel point in a main component of the grayscale watermark image into a maximum singular value of a first diagonal matrix of the diagonal tensor; carrying out T-SVDinverse transformation on the image blocks embedded with the watermarks to obtain the approximate images embedded with the watermarks, and decomposing the LL sub-bands of three channels to obtain thecolor images containing the watermarks; in watermark extraction, obtaining the diagonal tensor of the image block in the synthesized approximate image as well, and then obtaining the main component of the watermark image to be extracted; and extracting to obtain a watermark image according to the main component and the watermark extraction key. The method has the advantages that the close relationship among the three channels of the color image is kept, and the robustness and the invisibility are good.

Description

technical field [0001] The invention relates to a color image watermark technology, in particular to a color image robust watermark method based on tensor singular value decomposition. Background technique [0002] With the rapid development of computer networks, the duplication, dissemination and downloading of digital data has become very easy, seriously damaging the legitimate rights and interests of users. Therefore, the copyright protection of digital products is an urgent problem to be solved. Digital watermarking technology embeds some meaningful information into digital products without affecting the original carrier. Digital watermarking method provides an effective protection method for images. However, in real life, color images play a leading role. Therefore, the research on color image watermarking technology has important significance and application value. [0003] Generally speaking, image watermarking techniques can be divided into: fragile watermarking, ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T1/00
CPCG06T1/005G06T2207/10024
Inventor 李黎骆挺徐海勇杜萌许辰张芳燕
Owner 杭州电子科技大学上虞科学与工程研究院有限公司
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