Abstract
A new difference-histogram modification Reversible Data Hiding (RDH) scheme by using bilinear interpolation prediction is proposed in this paper. First, the proposed method considers each neighboring pixels x and y to predict z by bilinear interpolation on four pixels which are near to pixel-pairs x and y. Then, according to d1 = x−y,d2 = y−zy, and d3 = z−zx, a new coordinate system (d1,d2,d3) is generated. In this three-dimensional coordinate, the proposed method uses six quadrants to embed secret information: points on the specified surface are used for embedding and the extending space surrounded the embedded surfaces are used for shifting. Finally, a new multi-dimension difference-pair-mapping is used to implement the reversible data embedding. Therefore, more embedding conditions are obtained, thereby increase the number of embedded pixels and get more embedding capacity.
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