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Prediction-error expansion (PEE) is an efficient technique for reversible data hiding (RDH). Instead of expanding the highest histogram bins in conventional PEE, in this paper, to better utilize the image redundancy, we propose a new PEE-based RDH scheme with an advisable expansion strategy utilizing referential prediction-errors. For each pixel, we first calculate its prediction-error and use its...
In this paper, a novel reversible data hiding (RDH) scheme based on reference pixels and adaptive block selection is proposed. We first divide the cover image into non-overlapping blocks. Then for each block, we assign the pixels with median value as reference pixels and the number of reference pixels as a smooth level (SL). In this way, residual histograms for each SL can be generated. For the blocks...
Reversible data hiding (RDH), in which the original cover medium can be exactly extracted from the marked content, has attracted considerable interests from the information hiding community. In this paper, current RDH techniques are first reviewed by introducing the following five types of schemes: early lossless-compression-based schemes, expansion-based schemes, recent lossless-compression-based...
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