一种基于DCT-SVD域灰度级的盲水印算法

AGray-Scale Blind Watermarking Algorithm Using Single Value Decomposition in DCT Domain

本文首先应用Arnold变换和一种快速的Arnold反变换对水印图像进行加密,进而应用分块的量化SVD嵌入法对DCT块系数进行调整,提出了一种新的灰度级的盲水印算法,较好的解决了灰度水印鲁棒性和透明性之间的矛盾。实验结果证明,该算法对JPEG压缩、裁剪等常见的处理操作有较好的鲁棒性。

First, a simple but fast algorithm is used to encrypt watermark in this paper which uses Arnold transform and a fast antiArnold transform, and then a gray-scale blind watermarking technique operating on DCT domain is presented, which embeds watermark information by adjusting coefficients of selected DCT block using quantization SVD. The experimental results show that the pro- posed algorithm is effective and robust to common image processing operations and some geometric distortions such as cropping.