摘要
数字图像分存技术主要研究如何把一幅秘密的数字图像分解成几幅无意义或者杂乱无章的图像或者伪装到几幅有意义的图像中进行存储或传输,以便增加图像信息的安全性能。该文以图像信息安全问题为背景,介绍了数学中矩阵分解的若干种形式,以及其在数字图像分存中的应用,并给出了相应的算法和应用例子。按照该文所给算法来分存,数据膨胀率分别为8和4,并且可以无误差地恢复出原图像。
The technology of digital image sharing mainly studies how to decompose a secret image into several mean-ingless or disordered images or camouflage it into several significant and meaningful images to store or transfer in order to enhance the security of the image information.With image information security as background,this paper introduces several forms of matrix decomposition in math and the using in digital image sharing.At the same time ,the paper pre-sents the corresponding algorithm and examples.Sharing an image based on the scheme proposed by this paper,the pix-el expansion is only8or4,which is the least among those in the previously proposed methods,and the secret image can be recovered accurately and without error.
出处
《计算机工程与应用》
CSCD
北大核心
2004年第32期96-98,127,共4页
Computer Engineering and Applications
关键词
信息安全
信息隐藏
矩阵分解
数字图像置乱
数字图像分存
information security,information hiding,matrix decomposition,digital image scrambling,digital image sharing
