全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...

基于无损水印的医学图像篡改检测和高质量恢复

DOI: 10.11834/jig.20140413

Keywords: 无损数字水印,医学图像,四叉树分解,线性插值,篡改检测

Full-Text   Cite this paper   Add to My Lib

Abstract:

目的采用无损数字水印算法对医学图像进行篡改检测和恢复是一个重要的研究领域。针对现有方法在区域划分和块特征值选取上的不足,提出一种新的基于四叉树分解和线性加权插值技术的无损水印算法。方法首先对原始的医学图像进行四叉树分解,得到非固定尺寸且具有高同质性的图像块;然后利用线性加权插值方法计算每个图像块的特征值作为水印信息,最后采用基于混沌的简单可逆整数变换进行水印嵌入。结果在提取端当水印图像没有受到篡改时,原始的图像能被无损恢复;当受到篡改时,算法能精确定位篡改区域并能高质量恢复,采用本文算法恢复的图像质量较现有方法高出20dB左右。另外,在水印图像遭到较大程度篡改时,本文算法的正检率和负检率均优于现有方法。结论实验结果表明,本文算法相比现有方法具有更高的嵌入容量、篡改检测精确性、恢复图像质量。算法适用于医学图像的完整性认证和篡改检测中。

References

[1]  Chen F, He H J, Wang H X.Variable-payload self-recovery watermarking scheme for digital image authentication[J].Chinese Journal of Computers, 2012, 35(1): 154-163.[陈帆, 和红杰, 王宏霞.用于图像认证的变容量恢复水印算法[J].计算机学报, 2012, 35(1):154-163.]
[2]  Zhong X Y, Feng Q J, Chen W F, et al.Hard authentication for medical image based on sensitivity of hash function[J].Journal of Image and Graphics, 2008, 13(2): 204-208.[钟晓燕, 冯前进, 陈武凡, 等.基于Hash函数敏感性的医学图像精确认证[J].中国图象图形学报, 2008, 13(2): 204-208.]
[3]  Deng X H, Chen Z G, Deng X H, et al.A novel dual-layer reversible watermarking for medical image authentication and EPR hiding[J].Advanced Science Letters, 2011, 4(11): 3678-3684.
[4]  Li C T, Li Y.Medical images authentication through repetitive index modulation based watermarking[J].International Journal of Digital Crime and Forensics, 2009, 1(4):32-39.
[5]  Peng F, Lei Y Z, Long M, et al.A reversible watermarking scheme for two-dimensional CAD engineering graphics based on improved difference expansion[J].Computer-Aided Design, 2011, 43(8):1018-1024.
[6]  Tian L H, Zheng N N, Xue J R, et al.An integrated visual saliency-based watermarking approach for synchronous image authentication and copyright protection[J].Signal Processing: Image Communication, 2011, 26(8):427-437.
[7]  Chiang K H, Chien K C C, Chang R F, et al.Tamper detection and restoring system for medical images using wavelet-based reversible data embedding[J].Journal of Digital Imaging, 2008, 21(1): 77-90.
[8]  Guo X T, Zhuang T G.Lossless watermarking for verifying the integrity of medical images with tamper localization[J].Journal of Digital Imaging, 2009, 22(6): 620-628.
[9]  Li C L, Wand Y H, Ma B, et al.Tamper detection and self-recovery of biometric images using salient region-based authentication watermarking scheme[J].Computer Standards & Interfaces, 2012, 34(4): 367-379.
[10]  Kim K S, Lee M J, Lee J W, et al.Region-based tampering detection and recovery using homogeneity analysis in quality-sensitive imaging[J].Computer Vision and Image Understanding, 2011, 115(9):1308-1323.
[11]  Deng X H, Chen Z G, Zeng F, et al.Authentication and recovery of medical diagnostic image using dual reversible digital watermarking[J].Journal of Nanoscience and Nanotechnology, 2013, 13(3):2099-2107.
[12]  Rawat S, Raman B.A chaotic system based fragile watermarking scheme for image tamper detection[J].International Journal of Electronics and Communications, 2011, 65(10): 840-847.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133