作　　者： ; ; ; ;

机构地区： 西安电子科技大学电子工程学院

出　　处： 《计算机与数字工程》 2007年第3期5-7,28,共4页

摘　　要： 提出一种基于DWT和DCT域的有意义二值图像数字水印算法;利用Arnold变换对水印序列进行置乱,消除象素的空间相关性,增加水印的安全性;而结合小波变换和离散余弦变换的特性,将水印信息嵌入到图像变换域的低频和中频系数中,提高水印的鲁棒性和不可见性;实验证明该算法具有较好的抗压缩、抗噪音和抗剪切性。 A novel meaning binary image digital watermarking algorithm based on DWT and DCT is proposed. The proposed scheme utilizes Arnold transform to scramble the watermarks sequences, which destroys the spatial relativity between each two pixels of watermark, so that the security of embedding watermarks is enhanced. Combined with the characteristics of DWT and DCT, the watermark is embedded into the low frequency of transform domain, so the robustness and transparency of watermark are improved. The experimental result shows that it is robust against JPEG compression, adding noise and cropping.

关 键 词： 数字水印 小波变换 离散余弦变换 置乱

领　　域： [自动化与计算机技术] [自动化与计算机技术]