基于图像置乱和小波变换的数字水印技术

Digital Watermark Technology Based on Image Scrambling and Wavelet Transform

本文研究了一种基于图像置乱和小波变换的信息隐藏技术.该算法先将嵌入的水印信息置乱加密,然后嵌入到进行了离散小波变换的宿主灰度图像中.通过实验验证,该算法在对嵌入水印后的图像进行有损压缩、剪切、旋转、添加各种噪声等处理后,提取出的水印表现出了较好的鲁棒性.

This paper discusses the digital watermark technology which is based on image scrambling and wavelet transform. After the scrambling and encryption of embedded watermark information, this algorithm embeds it into the host gray images with discrete wavelet transform. The experiment result showed that the algorithm has a good robustness for some image processing operations such as JPEG loss compression, cropping, rolling, blurring noise added and so on.