中文说明：这是个由matlab仿真实现的基于dwt的数字水印技术算法，实现了数字水印的嵌入、提取和一系列攻击实验。效果良好。
English Description：
This is a digital watermarking algorithm based on DWT, which is simulated by MATLAB. It realizes the embedding, extraction and a series of attack experiments of digital watermarking. The effect is good.