数字水印算法的鲁棒性和不可见性研究  

Research on Robust and Invisibility of Digital Watermarking Algorithm

作　　者：张德发[1] 胡维华[2] 

机构地区：[1]台州职业技术学院计算机工程系,浙江台州318000 [2]杭州电子科技大学,浙江杭州310018

出　　处：《计算机仿真》2012年第7期274-277,共4页Computer Simulation

摘　　要：研究用于数字图像版权保护的数字水印算法。由于数字图像的直观可见性,嵌入其中并对其进行版权保护的数字水印需要隐藏在图像内,但传统的数字水印算法不能兼顾实现鲁棒性和不可见性,造成水印的抗攻击能力不强。为了解决上述难题,提出了一种基于邻域均值的水印算法,首先对原数字图像进行多尺度Contourlet域变换,将图像分解为多个子带,便于增强嵌入水印的鲁棒性,然后对水印图像进行Arnold变换并加密,根据邻域均值量化算法选取图像中重要区域嵌入水印,保证嵌入水印的不可见性,最终实现水印的有效嵌入。实验证明,这种方法能够兼顾数字水印的鲁棒性和不可见性,提高了水印的抗攻击能力,取得了满意的结果。Research digital image watermarking algorithm for copyright protection. The paper proposed a new wa- termarking algorithm based on the neighborhood mean of watermarking algorithm. First Contourlet domain transforma- tion of digital image was carried out to decompose the image, which can increes enhance the robustness of the embed- ded watermarking. The Arnold transform and encryption were done with the wartermarking image. According to the neighborhood mean quantitative algorithm, the important areas were selected to enbed watermark, which ensures the invisibility of the watermarking and realizes the effective embedded watermarking at last. Experiments show that the method can give consideration to the digital watermarking against the attack, and satisfactory results were obtained.

关 键 词：数字水印 鲁棒性 不可见性 

分 类 号：TP317.4[自动化与计算机技术—计算机软件与理论]