计算机与数字工程2011，Vol.39Issue(6)：122-125,134,5.
一种多级离散余弦变换和奇异值分解的零水印算法
Zero Digital Watermarking Algorithm Based on Multiple-Level Discrete Cosine Transform and SVD
王武军1
作者信息
- 1. 西安航空技术高等专科学校实验实训中心,西安,710077
- 折叠
摘要
Abstract
The drawback of the conventional digital watermark methods based on multiple level discrete cosine transform is loss of image fidelity due to the fact that essential modification to the original image should he done in embedding digital watermarks. A new algorithm for zero digital watermarks based on multiple level discrete cosine(MDCT) and SVD transforms is proposed in this paper. Firstly extracting the low frequency part of the multiple level discrete cosine transform result of the original image and SVD is applied. Then the watermark image is confused with the image scrambling,meanwhile SVD is applied as well as. Finally the encrypted image is constructed by correlative operation for the SVD results of original image and watermark image. The proposed algorithm is relatively robust in the presence of noise and presents high detection accuracy due to the fact that the watermark is a gray level image instead of a sequence of binary number. Experimental results show the superiority of the proposed method in comparison with some recent methods. It is also shown that the proposed method is relatively robust to some image degradation processes such as noise, cropping, filtering and JPEG compression etc.关键词
多级离散余弦变换/奇异值分解/零水印/鲁棒性Key words
multiple-level discrete cosine transform/ SVD/ zero-watermark/ robustness分类
信息技术与安全科学引用本文复制引用
王武军..一种多级离散余弦变换和奇异值分解的零水印算法[J].计算机与数字工程,2011,39(6):122-125,134,5.
