摘要
为了克服常规的数字水印算法在嵌入水印信息时,造成图像一定程度的失真,提出了一种基于分段logistic混沌映射的零水印算法。在不对图像原始数据作任何修改的基础上,利用混沌算法对初始值极其敏感的特性来生成混沌序列,利用混沌序列来确定所选取的图像小波变换第三级细节部分小波系数的位置,提取相应位置上小波系数的特征生成图像的水印。实验结果表明,该算法针对压缩、噪声攻击、剪切攻击等具有较强的鲁棒性。
To overcome conventional watermarking algorithm cause distortion of image while embedding watermark, a Zero-watermarking algorithm based on piecewise logistic chaotic map is proposed and chaotic sequences are generates by chaos character that chaotic sequences is sensitive to initial value. The wavelet coefficients of the third level detail part is selected to make watermark of the image by the chaotic sequences , which does not make any changes to the original data of the image. The experimental results show that the algorithm has stronger robustness to compression, additive noise, shear and other image processing attacks.
出处
《计算机工程与设计》
CSCD
北大核心
2013年第2期464-468,共5页
Computer Engineering and Design
基金
上海高校选拔培养优秀青年教师科研专项基金项目(5107341007)
上海理工大学博士启动基金项目(10D143)
关键词
数字水印
小波变换
混沌算法
鲁棒性
相似度
digital watermarking wavelet transform chaos algorithm robustness similarity
