基于DCT的数字水印加密与解密技术  

Digital watermarking encryption and decryption based on DCT

作　　者：杨焰[1] 刘炜[2] 

机构地区：[1]成都职业技术学院,四川成都610051 [2]西安理工大学,陕西西安710048

出　　处：《中南林业科技大学学报》2011年第11期203-207,共5页Journal of Central South University of Forestry & Technology

摘　　要：研究了一种基于离散余弦变换(DCT)的数字水印算法,并进行了仿真实现和攻击测试。结果表明,通过在原始图像纹理较复杂子块的中频部分嵌入水印信息,可以达到较好的不可见性,并能有效抵抗加噪、拼贴、剪切、JPEG压缩等攻击,具有较强的鲁棒性。A digital watermarking algorithm based on discrete cosine transform（DCT） has been realized and an attack testing and simulation realization were carried out.The results show that,embedding the intermediate frequency part of the more complex texture sub-blocks of the original image the watermark information,we can achieve good invisibility and effectively resist the attacks of additive noise,collage,cutting,JPEG compression and others.The new thechnique has a strong robustness.

关 键 词：离散余弦变换 水印嵌入 水印提取 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]