3-D Difference Histogram Modification for Reversible Data Hiding

Abstract: 3-Dimensional Difference Histogram Modification for reversible data hiding is a technique, in which a reversible data hiding scheme is proposed by using difference-pair-mapping for 3-d images. For each pixel pair, it calculate the differences of neighbouring pixel values and select some difference numbers for difference expansion.. Then, a three-dimensional difference-histogram is generated. Finally, reversible data embedding is implemented according to the improved Difference Pair Mapping and LSB method. In 3-d Difference Histogram Modification for Reversible Data Hiding, a separable reversible data hiding is implemented. The LSB algorithm is improved to RGB- LSB algorithm for 3-d images. The image redundancy can be better exploited and an improved embedding performance is achieved by this approach. A pixel-pair-selection strategy is also adapted to use the pixel-pairs located in smooth image regions to embed data. This can further enhance the embedding performance.

Keywords: Reversible data hiding, Difference Expansion, Histogram Modification, image encryption, RGB- LSB technique.