Self-embedding watermark with flexible restoration quality

Authors:
Xinpeng Zhang;Shuozhong Wang;Zhenxing Qian;Guorui Feng
Affiliations:
School of Communication and Information Engineering, Shanghai University, Shanghai, People's Republic of China 200072;School of Communication and Information Engineering, Shanghai University, Shanghai, People's Republic of China 200072;School of Communication and Information Engineering, Shanghai University, Shanghai, People's Republic of China 200072;School of Communication and Information Engineering, Shanghai University, Shanghai, People's Republic of China 200072
Venue:
Multimedia Tools and Applications
Year:
2011

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Abstract

A novel self-embedding watermarking scheme is proposed, in which the reference data derived from the most significant bits (MSB) of host image and the localization data derived from MSB and reference data are embedded into the least significant bits (LSB) of the cover. At authentication side, while the localization data are used to detect the blocks containing substitute information, the reference data extracted from other regions and the spatial correlation are exploited to recover the principal content in tampered area by a pixel-by-pixel manner. In this scheme, the narrower the tampered area is, the higher quality of recovered content can be obtained.