基于三维变换域医用体数据鲁棒数字水印算法研究

项目名称： 基于三维变换域医用体数据鲁棒数字水印算法研究

项目编号： No.61263033

项目类型： 地区科学基金项目

立项/批准年度： 2013

项目学科： 自动化技术、计算机技术

项目作者： 李京兵

作者单位： 海南大学

项目金额： 43万元

中文摘要： 海南正在进行国际旅游岛建设，中外游客和候鸟老人对医疗的需求日益加大。由于历史原因海南的医疗诊断水平较低，远程医疗是解决这一难题的有效手段之一，但如何保证三维医用体数据在网上传输时的安全，这一问题随着网络的普及日益严重。通过水印技术可以将病人重要信息和其电子病历隐藏在医用体数据中，从而保证个人隐私信息在互联网传输时不被泄露。但目前三维医用体数据数字水印技术有两个难以解决的问题，一是鲁棒性;二是如何在宿主图像中嵌入大容量的信息。本项目通过在医用体数据的三维变换域中，提取出抗常规和几何攻击的鲁棒特征向量，将该特征向量与要嵌入的水印信息相关联，利用哈希函数、第三方概念和零水印等技术进行水印的嵌入与提取,设计的水印算法有较强的鲁棒性。并对基于3D DCT、3D DFT、3D DWT等不同的算法进行比较和理论分析。同时搭建基于医学图像数字水印的远程医疗测试平台，对水印算法进行验证。

中文关键词： 变换域；数字水印；特征提取；医学体数据；鲁棒性

英文摘要： In Hainan, the International tourism island is under construction. These people, who are the foreign tourists and the elderly called migratory birds, need high-quality medical. With the historical reasons, there is a lower level of medical diagnostics in Hainan province. Telemedicine is effective to solve this problem. How to ensure the security of patient's private information when it is transmitted on the Internet is a big issue. Utilizing the invisibility and robustness properties of watermarks, patient information, doctor diagnosis and Electronic Patient Records can be embedded in the medical images as hidden watermarks. However, there are two difficult things to be solved, which is robustness and high capacity for watermarking. In this project, using 3D transform, a strong feature vector, which is robust to common and geometrical attacks, is extracted. Combining the feature vector, hash function, the third part with zero watermarking, the robust algorithm is proposed. We propose some watermarking algorithm under 3D DCT, 3D DFT, 3D DWT and so on, and compare different algorithms and do some theoretical analysis. Finally, we design a telemedicine test platform based on medical image digital watermarking to validate these algorithms.

英文关键词： Transform domain；Watermarking；Feature extraction；Medical volume data；Robustness