Research of Recoverable Semi-fragile Watermarking for Image Content
Dongyan Liu · 2010
In this paper,a new semi-fragile watermarking scheme based on image content for tampering localization and recovery is proposed.The authentication watermark is embedded in the SVs(singular values) with an adaptive quantized method within the domain of nonsubsampled contourlet transform(NSCT).This method can improve the tampering localization capability without causing noticeable artifacts and can distinguish involuntary modification from vicious attacks.The recovery watermarking is achieved by dividing the original image,scrambling,encoding and encrypting,at last handing on the third party in which zero-watermarking technique is used.The results of the experiment show that the proposed scheme can detect and localize the tamper,as well as can recover the tamper image when it undergoes JPEG compression.