计算机工程与应用2011，Vol.47Issue(21)：157-161,5.DOI:10.3778/j.issn.1002-8331.2011.21.041
基于DCT和SVD变换的盲数字水印算法
Blind digital watermarking algorithm based on DCT and SVD transform
摘要
Abstract
Combining SVD transform, this paper proposes a blind digital watermarking algorithm based on DC coefficients of DCT-domain.This algorithm executes DCT transform on each 8×8 block of the original image,and executes SVD transform on each 2×2 block of the collection of the DC coefficients.The quantization step Q is used to quantify the max singular value in order to embed the watermark in the result of the quantization.Because the DC coefficients are chosen for SVD transform, and the results of SVD represent the internal properties instead of the visual features, this algorithm gets a better robustness and transparency.The experiment results show that it can effectively resist the tampering attacks such as:median filtering,JPEG compression,noise and so on.The extraction process becomes very easy and convenient because it does not require the original image to involve in.关键词
奇异值分解(SVD)变换/盲水印/量化步长/直流系数Key words
Singular Value Decomposition (SVD) transform/blind watermarking/quantization step/Direct Current(DC) coefficients分类
信息技术与安全科学引用本文复制引用
王友卫,申铉京,吕颖达,陈海鹏..基于DCT和SVD变换的盲数字水印算法[J].计算机工程与应用,2011,47(21):157-161,5.基金项目
国家自然科学基金(the National Natural Science Foundation of China under Grant No.60773098) （the National Natural Science Foundation of China under Grant No.60773098）
吉林省科技发展计划资助(No.20050305). （No.20050305）
