基于内容认证与盲重建的半脆弱水印系统  

Semi-frangile watermark system based on content authentication and blind reconstruction

作　　者：郭越[1] 程景云[1] 

机构地区：[1]上海海事大学信息工程学院,上海200135

出　　处：《上海海事大学学报》2005年第4期86-90,共5页Journal of Shanghai Maritime University

摘　　要：应用噪声分离技术处理图像的小波系数,利用形态学过滤操作选取特征系数,保证提取到的特征系数对一些可接受的失真具有鲁棒性。在此基础上利用纠错码对提取出来的特征系数进行编码,将纠错位经分散处理后嵌入图像中,以便于恢复篡改图像。利用公钥基础设施(PKI)系统对图像内容进行认证,进一步加强系统的安全性和完整性。The technique of noise decaration to deal with the wavelet coefficients is introduced. The morphological theory is used to select the characteristic coefficients, which ensures the robustness of the coefficients above mentioned. On the base of the method, the selected characteristic coefficients are encoded with the error correction code, in the meantime the error correction bits which are subject to the processing of dispersal are embedded into images. Authentication of image content using public key infrastructure （PKI） can locate the actual places of the tampering and rehab the image, and fortify the security and integrity of the system as well.

关 键 词：数字水印 内容认证 公钥基础设施(PKI) 纠错码 噪声分离 形式学操作 

分 类 号：TN918[电子电信—通信与信息系统]