摘要
提出一种基于曲波和混沌序列的数字图像脆弱水印算法.本算法采用混沌序列和位运算对水印图像进行加密,并使用曲波对载体和水印图像做变换.在嵌入强度上,为了能够具有更好的透明性,使用周围像素均值为依据,调整基本嵌入强度值,使得水印的透明性进一步增强.在进行曲波变换时,也采用效率比较高的Wrap-ping作为实现方法,有效地提高了算法效率.实验证明该算法对各种攻击具有较高的敏感性,可以作为图像认证的方法.
Based on Curvelet and chaotic sequences,a digital image fragile watermarking algorithm is presented.The algorithm scrambling watermarking image used Logistic chaotic sequence and bit exchange and used Curvelet transform the initial image and watermarking image.According to the average coefficient,the algorithm is self-adjust the basic embed intension.The algorithm has highly efficiency for using the Wrapping.The large amount of emulation experiment indicates the algorithm has highly efficiency and security.And effect of concealing is very good.
出处
《喀什师范学院学报》
2010年第3期59-62,共4页
Journal of Kashgar Teachers College
关键词
数字水印
曲波
混沌
脆弱水印
The digital watermarking
Curvelet
Chaotic
fragile watermarking
