Fragile Watermarking Scheme with Extensive Content Restoration Capability

Authors:
Xinpeng Zhang;Shuozhong Wang;Guorui Feng
Affiliations:
School of Communication and Information Engineering, Shanghai University, Shanghai, P.R. China 200072;School of Communication and Information Engineering, Shanghai University, Shanghai, P.R. China 200072;School of Communication and Information Engineering, Shanghai University, Shanghai, P.R. China 200072
Venue:
IWDW '09 Proceedings of the 8th International Workshop on Digital Watermarking
Year:
2009

Citing 6
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Abstract

This paper proposes a novel fragile watermarking scheme capable of recovering the original principal content in extensive areas. The watermark data are made up of two parts: reference-bits derived from the principal content of the host image and containing some necessary redundancy, and hash-bits matching the content of local blocks. While the reference-bits are embedded into the entire host image, the hash-bits are embedded into the local blocks. On the authentication side, after identifying the tampered areas, the watermark data extracted from the reserved regions can provide sufficient information to restore the principal content of host image even when the rate of tampered blocks is large.