一种基于矢量共享方案的DCT域上数字水印分存算法

A DCT Domain Digital Watermarking Sharing Algorithm Based on Vector Secret Sharing Scheme

数字水印分存是将秘密共享的思想用于数字水印 ,将原始水印信息分解成n份分存水印信息 ,获得其中部分分存水印信息就能恢复出原始水印信息 .该文提出一种基于矢量共享方案的DCT域上的数字水印分存算法 .它将矢量共享的思想用于数字水印 .原始载体图像分块后 ,在DCT变换的低频域上加载分存后的水印数据 .水印信息隐藏前 ,对原始水印和分块水印都进行扰乱处理 ,同时分存也具有加密作用 .算法具有很高的安全性和较好的稳健性 .实验表明 ,算法还具有较好的隐藏效果和很好的抗剪切、抗压缩等功能 .

Digital watermarking sharing applies the thought of the secret sharing to the digital watermarking. It divides the original watermarking information into n parts. When some parts are known, the original information can be recovered. This paper presents a digital watermarking sharing algorithm based on vector secret sharing scheme, and applies the thought of vector sharing to digital watermarking. After the original image is divided, the digital watermark is embed into the low frequency DCT domain. The algorithm disturbs both the original watermark and the sharing block watermark before hiding the original watermark. The sharing processing has the effect of disturbing too. So the algorithm has highly security and robustness. Experimental results show the algorithm has a good effect of hiding, anti-cutting and anti-compressing.