静态图像多维水印的并行嵌入和检测  

PARALLEL EMBEDDING AND DETECTION OF MULTIDI- MENSIONAL WATERMARK FOR STILL IMAGE

作　　者：梁建勋[1] 胡波[1] 凌燮亭[1] 

机构地区：[1]复旦大学电子工程系CAT实验室,上海200433

出　　处：《红外与毫米波学报》2002年第2期114-118,共5页Journal of Infrared and Millimeter Waves

摘　　要：数字水印已经成为多媒体数据产权保护的一种有效的解决方案 .不可察觉性和鲁棒性是图像水印中基本要求 ,但它们却是一对互相制约的因素 .在两者中间寻找一个平衡点 ,已经成为水印中的一个关键问题 .本文提出了一种多维水印的方案 ,在图像的DCT域中 ,使用扩频技术并行地嵌入互相独立的多维水印信号 ,可以在不增加水印信号幅度的情况下 ,提高水印的鲁棒性 .Digital watermarking has become one of the effective solutions to the protection of copyright of multimedia data. Imperceptibility and robustness, which are the basic requirements of digital watermark, conflict with each other. So, looking for a trade-off of the pair has become of the keys in watermarking. A scenario of multidimensional watermark for resolving rightful ownership of digital images was proposed in this paper. The multidimensional watermark, whose vectors are mutually independent, was embedded into image in the DCT domain in parallel by suing spread-spectrum technology. The robustness of multidimensional watermark was improved without enhancing the watermark energy.

关 键 词：静态图像 多维水印 并行嵌入 检测 产权保护 扩频通信 伪随机 联合概率分布 数字水印 

分 类 号：TN911.93[电子电信—通信与信息系统] TP391.41[电子电信—信息与通信工程]