一种基于小波域的数字水印嵌入与提取算法  

Realization of Embedding and Extracting Watermark Based on Wavelet Transform

作　　者：王雯霞[1] 彭勃[1] 

机构地区：[1]河南科技大学,河南洛阳471003

出　　处：《现代电子技术》2008年第11期75-77,共3页Modern Electronics Technique

摘　　要：提出了一种基于小波变换的图像嵌入数字水印及检测的方法。对数字图像进行多级二维小波变换可以得到一个逼近图像和几个高频细节图像,对低频(逼近部分)图像嵌入数字水印,对加入水印的图像进行小波逆变换得到重构图像。检测时,先对重构图像进行小波变换,再对低频图像提取数字水印。In this paper,a method of realization of embedding and extracting watermark based on wavelet transform is given.An approach image and several high frequency image are gained by multi-level 2D wavelet transform to digital image.Watermark is added to the low band of the wavelet transform of image,and a watermark embedded image is reconstructed.Then,watermark is extracted from the low band of wavelet transform of watermark embedded image.

关 键 词：数字水印 小波变换 小波逆变换 鲁棒性 

分 类 号：TP392[自动化与计算机技术—计算机应用技术]