基于特征点的抗几何失真数字图像水印

为了增强水印的抗几何攻击能力,本文提出了一种基于图像内容的水印方案。图像的内容由具有几何不变性的特征点选出,在每块选出的内容上进行水印的嵌入和检测。由于图像的特征点在经过几何攻击后仍然可以保持,这样就很好地解决了水印的同步问题,保证了水印检测的可靠性。实验表明该算法能够很好地抵抗诸如旋转、缩放、剪切等几何攻击以及JPEG压缩攻击。

Robust Digital Image Watermarking Using Feature Point Against Geometrical Attacks

In this paper we proposed a robust digital image watermarking based on image content. The content of the image is used to mark independently different regions. This allows the synchronization of the mark for the detection step. Feature points mixed with a Delaunay tessellation permit to mark each triangle of the image. Experiments demonstrate that the technique can well withstand such geometrical attacks as rotation, scaling, shearing and translation, and JPEG lossy compression.