摘要
提出了一种在静止图像中嵌入数字水印的新算法 ;该算法采用灰度级图像作为水印 ,通过分解水印的离散余弦变换 (DCT)系数和修改原始图像的DCT中频系数实现水印的嵌入 .在水印嵌入过程中使用了伪随机排序和基块方差排序技术 .实验结果表明该算法对JPEG有损压缩、剪切等图像处理操作有很强的稳健性 .
Presents a novel algorithm for still image watermarking which is a gray scale image embedded into an original image by decomposing its discrete cosine transform (DCT) coefficients and modifying the DCT middle frequency coefficients of the original image, and in which pseudo random permuting and block based variance permuting techniques are adopted, and concludes from experimental results that the proposed algorithm is robust to many image operations, such as JPEG lossy compression image cropping, etc.
出处
《哈尔滨工业大学学报》
EI
CAS
CSCD
北大核心
2001年第5期700-705,共6页
Journal of Harbin Institute of Technology
关键词
数字水印
离散余玄变换
伪随机排序
基块方差排序
图像处理
digital watermarking
discrete cosine transform
pseudo random permutation
block based variance permutation
