现代电子技术Issue(15)：76-78,81,4.
基于 DCT 域自适应数字图像水印技术
Adaptive digital image watermarking technology based on DCT domain
摘要
Abstract
An adaptive digital watermarking algorithm is proposed based on the characteristics of discrete cosine transformation (DCT). Three medium frequency DCT coefficients and main diagonal coefficients are selected,and their means are calculated. The relation between the embedded coefficient and these two means are analyzed to achieve watermarking embedding adaptively by adjusting the value of embedded coefficient. The watermarking is preprocessed by Arnold transformation before being embedded to enhance the security of the algorithm. The experimental result shows that the algorithm has a good effect in watermarking extraction,as well as enough toughness and robustness for some common attacks,such as cutting,rotation,altering,JPEG compression,etc.关键词
自适应算法/数字图像水印/Arnold 变换/离散余弦变换Key words
adaptive algorithm/digital image watermarking/Arnold transformation/discrete cosine transformation分类
信息技术与安全科学引用本文复制引用
方春城,谭忠明,林若波,邢南亮..基于 DCT 域自适应数字图像水印技术[J].现代电子技术,2013,(15):76-78,81,4.基金项目
揭阳职业技术学院科研基金项目 （）
