摘要
采用小波变换和零树编码对图像进行水印嵌入和提取,通过对原始图像和水印图像分别进行不同级别的小波变换,选取原始图像小波的重要系数,将水印图像小波系数以一定的方式嵌入进去,使图像具有很好的稳健性及抗压缩性。
A digital image watermarking algorithm based on EZW wavelet coding and wavelet transform is presented. Wavelet transforms of different levels are applied to the original image and the watermarking image. The significant coefficients of the original image wavelet are selected, and the wavelet coefficients of watermarking image are embedded into them. This algorithm has the characteristics of robustness and anti-compression.
出处
《计算机应用与软件》
CSCD
北大核心
2008年第3期257-259,共3页
Computer Applications and Software
关键词
数字水印
小波零树
小波变换
Digital watermarking Zerotree of wavelet Wavelet transform
