Wavelet Based Image Authentication and Recovery

作     者：Rafiullah Chamlaw Asifullah Khan Adnan Idris 

作者机构：Pakistan Institute of Engineering and Applied Sciences (PLEAS)NiloreIslamabadPakistan A JK UniversityRawalakotAzad Jammu and Kashmir(AJK)Pakistan 

出 版 物：《Journal of Computer Science & Technology》 (计算机科学技术学报（英文版）)

年 卷 期：2007年第22卷第6期

页      面：795-804页

核心收录：

学科分类：0711[理学-系统科学] 07[理学] 08[工学] 080401[工学-精密仪器及机械] 0804[工学-仪器科学与技术] 080402[工学-测试计量技术及仪器] 

基　　金：This work was supported by the Higher Education Commission of the Government of Pakistan under the Indigenous Ph.D.Scholarship Program(Grant No.17-5-1(Cu-180)HEC/Sch/2004/4343) 

主　　题：semi-fragile watermark integer wavelet transform (IWT) discrete cosine transform (DCT) JPEG compression authentication and self-recovery 

摘      要：In this paper, we propose a secure semi-fragile watermarking technique based on integer wavelet transform with a choice of two watermarks to be embedded. A self-recovering algorithm is employed, that hides the image digest into some wavelet subbands for detecting possible illicit object manipulation undergone in the image. The semi-fragility makes the scheme tolerant against JPEG lossy compression with the quality factor as low as 70%, and locates the tampered area accurately. In addition, the system ensures more security because the embedded watermarks are protected with private keys. The computational complexity is reduced by using parameterized integer wavelet transform. Experimental results show that the proposed scheme guarantees safety of a watermark, recovery of image and localization of tampered area.