IEEE Trans Image Process - Improving various reversible data hiding schemes via optimal codes for binary covers.

Tópicos

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Resumo

In reversible data hiding (RDH), the original cover can be losslessly restored after the embedded information is extracted. Kalker and Willems established a rate-distortion model for RDH, in which they proved out the rate-distortion bound and proposed a recursive code construction. In our previous paper, we improved the recursive construction to approach the rate-distortion bound. In this paper, we generalize the method in our previous paper using a decompression algorithm as the coding scheme for embedding data and prove that the generalized codes can reach the rate-distortion bound as long as the compression algorithm reaches entropy. By the proposed binary codes, we improve three RDH schemes that use binary feature sequence as covers, i.e., an RS scheme for spatial images, one scheme for JPEG images, and a pattern substitution scheme for binary images. The experimental results show that the novel codes can significantly reduce the embedding distortion. Furthermore, by modifying the histogram shift (HS) manner, we also apply this coding method to one scheme that uses HS, showing that the proposed codes can be also exploited to improve integer-operation-based schemes.

Resumo Limpo

revers data hide rdh origin cover can lossless restor embed inform extract kalker willem establish ratedistort model rdh prove ratedistort bound propos recurs code construct previous paper improv recurs construct approach ratedistort bound paper general method previous paper use decompress algorithm code scheme embed data prove general code can reach ratedistort bound long compress algorithm reach entropi propos binari code improv three rdh scheme use binari featur sequenc cover ie rs scheme spatial imag one scheme jpeg imag pattern substitut scheme binari imag experiment result show novel code can signific reduc embed distort furthermor modifi histogram shift hs manner also appli code method one scheme use hs show propos code can also exploit improv integeroperationbas scheme

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