一种基于子采样的混合域稳健零水印算法

图学学报

一种基于子采样的混合域稳健零水印算法

出版日期:2013-06-29 发布日期:2015-06-11

A Robust Zero-Watermark Algorithm in Hybrid Transform Domains Based on Subsampling

Online:2013-06-29 Published:2015-06-11

摘要/Abstract

摘要： 为了实现对图像数据版权的有效保护，论文提出了一种新的基于子采样的
混合变换域零水印算法。先将载体图像进行非下采样剪切波变换，变换后的低频分量经过子
采样后得到4 幅子图，然后对每一幅子图进行分块处理，最后通过比较两幅随机子图中规定
映射位置上子块DCT 变换后的直流分量的大小关系构造零水印。实验结果表明，该算法能
够较稳健地抵抗添加噪声、JPEG 压缩和剪切等多种常见的攻击操作，同时具有较高的安全
性。

关键词: 零水印, 子采样, 剪切波变换, DCT

Abstract: A novel zero-watermark algorithm is proposed based on subsampling in hybrid
transform domain for the copyright protection of image dates. In this method, the host image is
performed with Non-Subsampled Shearlet Transform (NSST) firstly, and low-frequency
component is divided into four sub-images by subsampling, then block processing is done to
every sub-image. Finally, the zero-watermark is constructed by judging the numerical relationship
between the DC coefficients of two special blocks from different sub-images randomly.
Experimental results show that the method is very robust to common attack operations such as
Adding noise, JPEG compression, Cropping and so on.

Key words: zero-watermark, subsampling, Shearlet transform, DCT

韩绍程，张兆宁. 一种基于子采样的混合域稳健零水印算法[J]. 图学学报.

Han Shaocheng, Zhang Zhaoning. A Robust Zero-Watermark Algorithm in Hybrid Transform Domains Based on Subsampling[J]. Journal of Graphics.

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