In this section, a novel RDH scheme based on 2D-PEH modification is presented. First, the 2D-PEH is divided into specific regions. Then, the expansion bins selection in the divided 2D-PEH region is formulated as an optimal path searching problem. Finally, combine the adaptive PEE embedding [28] with the proposed optimal expansion path, the modification mapping is adaptively determined. The reversible embedding is then conducted according to the obtained modification mapping.