基于图像特征点的公钥水印算法

Public-key Watermarking Algorithm Based on Image Feature Keypoints

对于现在公钥水印算法一些抗几何攻击能力弱的问题,提出一种基于图像特征点的公钥水印算法。通过Harris-Laplace算法提取图像的特征点,构造局部特征区域,并在这些区域内做DCT变换和水印信息的嵌入,使得嵌入水印后的图像可以更好地抗RST攻击。

Aiming at the weak robustness to the geometric attacks of the public-key watermarking algorithm,a public-key watermarking algorithm based on image feature keypoints is proposed.The feature keypoints of image are extracted by Harris-Laplace algorithm,the watermarking in the DCT domain of the feature zone is embedded,so it can rest the RST attack.