作　　者： ; ; ;

机构地区： 天津大学精密仪器与光电子工程学院精密测试技术及仪器国家重点实验室

出　　处： 《光子学报》 2005年第8期1220-1223,共4页

摘　　要： 基于虚拟光学信息隐藏理论提出了一种三维空间数字水印算法.该数字水印算法能成为一种多媒体数据产权保护的有效方案.对算法的测试结果表明,该算法对于噪音叠加、剪切、旋转、有损压缩等常见的图像处理操作具有较高的鲁棒性.由于引入了虚拟光学信息隐藏思想,将虚拟光路的几何结构参数作为密钥,设计出了多重“锁”和多重“密钥”.随机模板编码技术的引入,更进一步提高了数字水印系统的密钥空间.仿真实验结果表明该算法具有很好的安全性. A new approach to digital watermarking in three-dimensional （3-D） space based on virtual-optics and random mask encoding is presented. The watermarking algorithm can offer an effective solution to the issue of copyright protection of multimedia data distributed via the communication channel. The results show that the embedded watermark is robust to normal data manipulations, such as adding noise, cropping, rotation, and JPEG compression. Because the design concept and methodology based on geometric parameters of Virtual-Optics was adopted, the proposed 3-D watermarking system has good security. There are large degrees of freedom existing for designing a security lock（s）/key（s）, including multiple lock（s）/key（s） and multi-dimensional lock（s）/key（s）. Numerical experiments are performed to validate the proposed method, and sensitivities of some parameters are quantitatively analyzed and illustrated. The possible dimensions of keys are roughly estimated and show a high security level.

关 键 词： 信息光学 虚拟光学 数字水印 随机模板 版权保护

领　　域： [自动化与计算机技术] [自动化与计算机技术]