文章介绍了数字水印和信息隐藏的相关概念,提出了一种改进的基于离散小波变换的二值图像盲水印算法。首先利用置乱技术将包含隐藏信息的二值水印图像打乱,然后利用改进的基于离散小波变换的嵌入和提取算法实现盲水印。由于文章中提出的算法可以降低对宿主图像的改动幅度,因而具有良好的不可见性和鲁棒性。
This thesis introduced the concept of the digital watermark and the information hiding, and proposed one kind of DWT - based image blind watermark algorithm. First disrupts the hideaway information binary watermark image with the scrambling technology, and then realizes the blind watermark using the improvement based on separate wavelet transformation's inserting and the extraction algorithm. Because this algorithm reduced to the host image modification scope, thus has the good invisibility and robustness.