IEEE Trans Image Process - Reference sharing mechanism for watermark self-embedding.

Tópicos

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Resumo

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.

Resumo Limpo

paper propos two novel selfembed watermark scheme base upon refer share mechan watermark embed refer deriv origin princip content differ region share region content restor identifi tamper block refer data origin content reserv area use recov princip content tamper area use first scheme origin data five signific bit layer cover imag can recov origin watermark imag can also retriev content replac extens second scheme host content decompos three level refer share method differ restor capabl employ protect data differ level therefor lower tamper rate level content data recov better qualiti restor result

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