Active Approach for Tamper Detection with Robustness to Lossy Compression  

作　　者：李剑 李生红 郑旭平 

机构地区：[1]Department of Electronic Engineering,Shanghai Jiaotong University [2]The Third Research Institute of Ministry of Public Security of P.R.C

出　　处：《Journal of Shanghai Jiaotong university(Science)》2013年第4期385-393,共9页上海交通大学学报（英文版）

基　　金：the National Natural Science Foundation of China(Nos.61071152 and 61271316);the National Basic Research Program (973) of China(Nos.2010CB731406 and 2013CB329605);the National "Twelfth Five-Year" Plan for Science&Technology Support(No.2012BAH38B04)

摘　　要：Active tamper detection using watermarking technique can localize the tampered area and recover the lost information. In this paper, we propose an approach that the watermark is robust to legitimate lossy compression, fragile to malicious tampering and capable of recovery. We embed the watermark bits in the direct current value of energy concentration transform domain coefficients. Let the original watermark bits be content dependent and apply error correction coding to them before embedded to the image. While indicating the tam- pered area, the extracted bits from a suspicious image can be further decoded and then used to roughly recover the corresponding area. We also theoretically study the image quality and bit error rate. ExperimentM results demonstrate the effectiveness of the proposed scheme.Active tamper detection using watermarking technique can localize the tampered area and recover the lost information. In this paper, we propose an approach that the watermark is robust to legitimate lossy compression, fragile to malicious tampering and capable of recovery. We embed the watermark bits in the direct current value of energy concentration transform domain coefficients. Let the original watermark bits be content dependent and apply error correction coding to them before embedded to the image. While indicating the tampered area, the extracted bits from a suspicious image can be further decoded and then used to roughly recover the corresponding area. We also theoretically study the image quality and bit error rate. Experimental results demonstrate the effectiveness of the proposed scheme.

关 键 词：active tamper detection energy concentration transform error correction code semi-fragile water- marking 

分 类 号：TN911.73[电子电信—通信与信息系统]