A Simple Image Tamper Detection and Recovery Based on Fragile Watermark with One Parity Section and Two Restoration Sections

摘要

A fragile self-recovery watermarking scheme with simple and effective tamper detection capability is proposed in this paper. In conventional fragile watermark for tamper detection and recovery, the parity section of the watermark is used for tamper detection and the restoration section of the watermark is used for image recovery, separately. In addition, to provide second chance for block recovery in case one copy is destroyed, Lee and Lin proposed dual watermarking scheme in which two copies of restoration watermark are embedded. In the proposed new scheme, fragile watermark with one parity section and two restoration sections are embedded, too. In addition to the second chance for image restoration, the two restoration sections as well as the parity section are all used for tamper detection. Experimental results show that the tamper detection capability is superior to other techniques.