Color image blind watermarking scheme based on QR decomposition
Color image blind watermarking scheme based on QR decomposition
复制标题
基于QR分解的彩色图像盲水印方案
DOI：
10.1016/j.sigpro.2013.06.025
复制
发表时间：
2014-01-01
影响因子：
4.4
通讯作者：
Yue, Jun
中科院分区：
文献类型：
--
作者：
Su, Qingtang;Niu, Yugang;Yue, Jun
现有的彩色图像水印方案大多采用二值或灰度图像作为水印，其中很多属于非盲水印方法。彩色图像盲水印方案的设计是一个具有挑战性的问题。与现有的以二值图像或灰度图像作为水印的方法不同，本文提出了一种基于QR分解的图像盲水印算法，将彩色水印图像嵌入到彩色宿主图像中。首先，将彩色宿主图像划分为4 × 4不重叠的像素块。然后对每个像素块进行QR分解，并对矩阵R中的第一行第四列元素进行量化以嵌入水印信息。在水印提取过程中，不需要原始宿主图像或原始水印图像，就可以从水印图像中提取水印。实验结果表明，与现有的相关方法相比，本文提出的彩色图像压缩、滤波、裁剪、加噪、模糊、缩放和锐化等攻击具有更强的鲁棒性。（C）2013 Elsevier B.V.版权所有。
Most of the existing color image watermarking schemes use binary or gray-level image as watermark, and many of them belong to non-blind watermarking methods. It is a challenging problem to design a blind color image watermarking scheme. Based on QR decomposition, this paper proposes a novel blind image watermarking scheme to embed color watermark image into color host image, which is different from some existing works using the binary or gray-level image as watermark. Firstly, the color host image is divided to 4 x 4 non-overlapping pixel blocks. Then, each selected pixel block is decomposed by QR decomposition and the first row fourth column element in the matrix R is quantified for embedding the watermark information. In the extraction procedure, the watermark can be extracted from the watermarked image without the requirement of the original host image or the original watermark image. Experimental results, compared with the related existing methods, show that the proposed color image scheme has stronger robustness against most common attacks such as image compression, filtering, cropping, noise adding, blurring, scaling and sharpening etc. (C) 2013 Elsevier B.V. All rights reserved.