计算机应用 ›› 2010, Vol. 30 ›› Issue (8): 2161-2163.
• 信息安全 • 上一篇 下一篇
崔得龙1,左敬龙2,彭志平3
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摘要： 为了实现数字图像的版权保护，设计了一种基于范重心和提升小波变换的抗局部非线性几何攻击数字水印算法。算法首先将水印图像进行置乱加密预处理，其次对原始图像进行三级小波提升，分别提取低频图像和高频图像范重心，并根据子图范重心坐标生成特征向量，最后将特征向量与水印运算得到代表原始图像的版权信息。实验结果表明，该算法对图像遭受的局部非线性几何攻击具有较强的鲁棒性，同时密钥的使用保证了算法的安全性。
关键词: 数字水印, 提升小波, 范重心, 非线性几何攻击
Abstract: An image watermarking scheme based on Normed Centre of Gravity (NCG) and lifting-based wavelet resisting nonlinear geometrical attacks was proposed to achieve the copyright protection of digital image in this paper. Firstly, the watermark image was preprocessed by employing scrambled. Secondly, wavelet transformation based three-level lifting for the original image was conducted, and then NCGs were detected from the low frequency and high frequency components, then the feature vector was generated by taking distances between NCGs. Finally, the copyright information was obtained by calculating the watermark and feature vector. The experimental results show that the scheme can well withstand local nonlinear geometric attacks, meanwhile security of the algorithm is guaranteed by using secret keys.
Key words: digital watermarking, lifting-based wavelet, normed centre of gravity, nonlinear geometric attack
崔得龙 左敬龙 彭志平. 基于范重心抗局部非线性几何攻击水印算法[J]. 计算机应用, 2010, 30(8): 2161-2163.
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链接本文: http://www.joca.cn/CN/
http://www.joca.cn/CN/Y2010/V30/I8/2161
