摘要
小波变换以其良好的空频特性,及与图象编码标准JPEG2000的兼容性,使得小波域水印更具鲁棒性,以及更大的嵌入容量。该文将展示多种利用小波变换进行扩频的水印算法,阐述如何运用小波图象压缩中的多尺度概念嵌入、检测水印。此外该文对小波域水印算法进行分类、比较,总结出各类水印算法的特性,并提出小波域水印算法的发展方向。
The advantage of wavelet domain watermark is its perfect location-freq ue ncy feather and its compatibility with the upcoming image coding standard,JPEG 2000.It makes the wavelet-domain watermark is more robust and can contain more capacity.We will see how to perform spread-spectrum watermarking by emp loying wavelet transform domain in a variety of ways,and how to embed and extra ct watermarks by the concept of multiresolution property of wavelet image decom position.We will classify and compare the wavelet watermarking algorithms ,an d illustrate their properties.At last,we will propose the tendency of the wa velet-domain watermarking algorithm.
出处
《计算机工程与应用》
CSCD
北大核心
2004年第11期46-49,104,共5页
Computer Engineering and Applications
基金
国家863高技术研究发展计划项目(编号:2003AA144081)
关键词
数字水印
小波变换
鲁棒性
图象压缩
HVS
Digital watermarking,Wavelet t ransform,Robustness,Compression,HVS
