摘要
该文主要研究了水印算法中小波基的选择和正交小波基的性质与水印稳健性的关系。研究结果表明:正交小波基的正则性、消失矩阶数、支撑长度以及小波图像能量在低频带的集中程度对水印稳健性的影响极小。同时也得到了一个有意义的结论:Haar小波比较适合应用于图像水印。该文还研究了在水印算法中,小波变换级数和嵌入公式的选取及其它一些问题。
In this paper, based on an embedding strategy for watermarking in DWT domain, the influence of characteristics of orthogonal wavelet for the robustness of watermarking and the selection of wavelet bases are mainly investigated. The results show the features like regularity, number of vanishing moments, filter length and the degree of energy collecting in the low frequency subband do not have any important impact on the robustness for watermarking. Meanwhile a significant conclusion that wavelet Haar is the most suitable for digital watermarking is got. Wavelet decomposed levels and watermarking embedding formula are also addressed.
出处
《电子与信息学报》
EI
CSCD
北大核心
2003年第4期453-459,共7页
Journal of Electronics & Information Technology
基金
国家自然科学基金(60133020
60172067)
广东省自然科学基金(013164)
广州市重大科技攻关项目
