Reference Sharing Mechanism for Watermark Self-Embedding

Authors:
Xinpeng Zhang;Shuozhong Wang;Zhenxing Qian;Guorui Feng
Affiliations:
Sch. of Commun. & Inf. Eng., Shanghai Univ., Shanghai, China;-;-;-
Venue:
IEEE Transactions on Image Processing
Year:
2011

Citing 0
Cited 7

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Abstract

This paper proposes two novel self-embedding watermarking schemes based upon a reference sharing mechanism, in which the watermark to be embedded is a reference derived from the original principal content in different regions and shared by these regions for content restoration. After identifying tampered blocks, both the reference data and the original content in the reserved area are used to recover the principal content in the tampered area. By using the first scheme, the original data in five most significant bit layers of a cover image can be recovered and the original watermarked image can also be retrieved when the content replacement is not too extensive. In the second scheme, the host content is decomposed into three levels, and the reference sharing methods with different restoration capabilities are employed to protect the data at different levels. Therefore, the lower the tampering rate, the more levels of content data are recovered, and the better the quality of restored results.