基于SVD和NSCT水印算法的医院档案管理平台设计

Design of Hospital Archives Management Platform Based on SVD and NSCT Watermark Algorithm

为了防止医疗系统中存储的海量电子档案信息被恶意篡改或非法复制,提出并设计了一种利用数字水印保护文档内容的电子档案管理平台。基于C/S模式搭建平台整体架构,通过用户交互、业务、数据访问3个结构层实现平台功能。在算法设计中引入了奇异值分解与非下采样轮廓波变换两种方法,用于水印在Contourlet域内的提取和植入。测试结果表明,用提出的算法实现的隐藏水印具有更高的鲁棒性。

In order to prevent the massive electronic file information stored in the medical system from being tampered with or illegally copied, this paper proposes and designs an electronic file management platform which uses digital watermark to protect the content of the document. Based on the C/S mode, the overall architecture of the platform is built, and the platform functions are realized through three structural layers: user interaction, business and data access. Two methods, singular value decomposition and unsampled contourlet transform, are introduced to extract and embed the watermark in Contourlet domain. The test results show that the proposed algorithm is more robust.