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Efficient reversible data hiding based on two-dimensional pixel-intensity-histogram modification

In this paper, referred to the general framework of histogram-shifting-based reversible data hiding, some valuable related works based on two-dimensional pixel-intensity-histogram modification are first introduced. In these schemes, all pixels are classified into two categories, which are embedded with data or shifted for reversibility, respectively. From this point of view, novel embedding schemes are proposed with more applicable pixel partition and more redundant information utilized. Moreover, pixel selection is conducted such that smooth pixels are priorly embedded to further exploit the image redundancy. The experimental results show the superiority of the proposed methods over some state-of-the-art works in terms of capacity-distortion performance.