在对原图像进行双正交7／9三级小波分解后 ，在第二级的水平、垂直、对角以及第三级对角分量上加入水印系数，再经过小波反变换重构出图像。-in the original image Biorthogonal 7 / 9 3 wavelet decomposition, in the second-class level, vertical, diagonal, and the third-class right angle to add weight coefficient watermark, a

In the original image Biorthogonal 7 / 9 3 wavelet decomposition, in the second-class level, vertical, diagonal, and the third-class right angle to add weight coefficient watermark, after wavelet-transform reconstruct images.

本文介绍了小波量化的数字图像水印嵌入和数字提取，取得了良好的效果。-In this paper, wavelet quantitative digital image watermark embedding and digital extraction, achieved good results.

这是基于小波变换的数字水印代码,在嵌入的水印加上一个pn尾随机序列-This is a digital watermark based on wavelet transform code, plus a pn in the embedded watermark random sequence