The DE technique for reversible data hiding was first proposed by Tian and Tiara [9
]. It is a high-capacity approach based on expanding the pixel difference value between neighboring pixels. His method allows one bit to be embedded in every pair of pixels. Given a pair of 256-grayscale image pixel values (x
255, their integer average c
and difference d
are computed as
denotes the floor function that seeks the greatest integer less than or equal ...