摘要
提出了一种DCT域的数字图像盲水印算法,该算法将图像进行8*8分块后对各块图像进行DCT变换。之后将水印信息嵌入到选取的中频系数之间的关系中;提取水印时不需要原始图像,实现了盲检测;而且水印嵌入位置可由密码控制,增强了算法的保密性和灵活性;不可感知性和鲁棒性可调。仿真实验结果表明该算法在保证水印不可感知性的情况下,对一些常见的恶意攻击具有良好的鲁棒性。
A blind digital image watermarking algorithm in DCT domain is proposed.In the algorithm,block DCT with size of 8＊8 is performed on the given image.The relationship between the selected DCT middle frequency coefficients is used to embed the watermark,No original image is needed when detecting the watermark.The embedding position of the watermark is determined by a key and the security is enhanced.Numerical experiments are carried out and the results show that the algorithm can resist against several attacks,such as JPEG compression,adding noise,histogram equalization,keeping the watermark imperceptible.
出处
《计算机工程与应用》
CSCD
北大核心
2008年第5期125-127,142,共4页
Computer Engineering and Applications
基金
国家自然科学基金(the National Natural Science Foundation of China under Grant No.60572048)
湖北省教育厅自然科学基金(the Natural Science Foundation of DOE of Hubei Province, No.D200613003)
关键词
数字水印
DCT变换
系数关系
盲水印
digital watermarking
DCT
coefficients relationship
blind watermarking
