摘要
首先讨论所有滤波长度为4的双正交小波的正则性,然后提出用这种参数小波提高易碎水印的安全性。研究结果表明:参数小波可以很容易同现有的水印算法结合提高水印的安全性,且不增加计算复杂度。
The regularity of all biorthonormal wavelets with filter length 4 is analyzed firstly. It is proposed to use secret wavelet filters to improve the security of digital watermarking schemes operating in the wavelet transform domain secondly. The results show that the parametric wavelet filters can be easily integrated into existing wavelet_based watermarking algorithms, resulting in improved security without additional computational complexity.
出处
《中山大学学报（自然科学版）》
CAS
CSCD
北大核心
2003年第5期11-14,共4页
Acta Scientiarum Naturalium Universitatis Sunyatseni
基金
国家自然科学基金资助项目(60172067)
国家863计划资助项目(2002AA144060)
博士后基金资助项目(2002032243)
关键词
参数小波
正则性
易碎水印
安全性
parametric wavelet
regularity
fragile watermarking
security
