基于DWT数字图像水印技术研究

摘要

This paper introduces an algorithm of digital watermarking based on Discrete Wavelet Transform （DWT）. According to the strength of watermark signal lower than the characteristics of human vision, the watermarking image is embedded in another image by adjusting the signal which is an invisible digital watermarking. This method will be further illustrated by the example of watermarking system that is developed in Matlab, which obtains watermarking image of good robustness and security.%提出一种改进DWT的数字水印算法。它以水印信号的强度低于人类视觉的特点，通过对信号的调整，在不改变视觉的效果下嵌入另一个图像；并用MATLAB和实验数据去验证，得到鲁棒性强、安全性高的数字水印图像。