基于小波变换的灰度水印嵌入算法

本文针对网络化数字媒体的版权保护提出了一种新的灰度水印图像嵌入到RGB彩色图像中的方法。首先将灰度水印图像进行置乱变换,再将置乱后的图像转换成二值序列,并将二值序列进一步分解成三个二值序列;然后将待嵌入水印的彩色图像分解成R、G、B三个分量,对每个分量分别作二级小波变换,得到小波变换的子带系数,再用奇偶判断法把三个二值序列的值分别嵌入各分量子带;最后用小波逆变换,恢复图像,合并三个分量,得到嵌入水印后的图像。仿真结果表明,本文方法有很好的透明性,且能有效的抵抗剪切、灰度调整、有损压缩等攻击。

The Algorithm of Gray Watermark Embedding Based on Wavelet Transform

A new algorithm is presented that gray watermark image is embedded in RGB color image about copyright protection of network media.First gray watermark image is processed by Arnold Transform,after that the image is transformed into binary sequence,which is broken down into three new binary sequences according to some rules.Then,the watermark color image to be embedded is broken down into three components which are RGB.Separately making two-level wavelet transform to each component,in order to getting sub-ban...