摘要
本文提出了一种基于离散小波变换和奇异值分解的数字水印算法。该算法充分利用了离散小波分解和矩阵奇异值分解(SVD)的固有特征,对Arnold置乱后的水印的多层小波分解子带做奇异值分解,把分解后的奇异值嵌入到原始图像的多层小波分解的相应子带中。水印的提取是嵌入算法的逆过程。Matlab仿真试验表明了算法的透明性、稳健性和安全性。
A digital watermarking algorithm based on discrete wavelet transformation (DWT) and single value decomposition (SVD) is proposed. It makes well use of the characteristics of DWT and SVD by doing SVD deposition to the subbands of muli-DWT of the Arnold scambled watermark and embedding those singular value to the corresponding multi-DWT subbands of the original image. Emulational experimental results in Matlab indicates that the proposed algorithm is invisible, robust and secure.
出处
《微计算机信息》
北大核心
2007年第04X期83-84,87,共3页
Control & Automation
基金
香港特区政府研究资助局研究项目(CUHK/4180/01E
CUHK/1/00C)