一种基于DCT的图像灰度水印算法  

A gray level image watermarking algorithm based on DCT

作　　者：李春华[1] 秦志英[2] 

机构地区：[1]河北科技大学信息科学与工程学院,河北石家庄050018 [2]河北科技大学机械电子与工程学院,河北石家庄050018

出　　处：《河北工业科技》2012年第3期146-148,154,共4页Hebei Journal of Industrial Science and Technology

基　　金：国家自然科学基金资助项目(11002046);河北省自然科学基金资助项目(A2011208007)

摘　　要：针对二值水印信息量小的缺陷,提出一种基于DCT的图像灰度水印算法,通过修改DCT域中低频系数值来嵌入水印,易于实现。仿真实验证明本算法能够抵御剪切、噪声和JPEG压缩失真,具有良好的不可见性和鲁棒性。A gray level image watermarking algorithm based on DCT is put forward in this paper, aiming at the binary water- mark defeets. The gray level image watermark is embedded in the host image by modifying the chosen DCT medium frequency coefficients, which is easy to be implemented. The experiments have proved that the proposed algorithm is with strong robust- ness in resisting shear attracts, noise attracts, compression attracts, and other common attracts.

关 键 词：DCT 灰度图像水印 鲁棒性 

分 类 号：TN911.73[电子电信—通信与信息系统]