Reversible Data Hiding Using Two Marked Images Based on Adaptive Coefficient-Shifting Algorithm
Figure 1
Example of data embedment with an input data digits of (103 103 2)4. (a) A host block, (b) a difference block; (c) adjust the maximum pixel value (118) to the top-left of the block; (d) add each data digit to the coefficients of the block in reverse order, (e) a hidden block, and (f) the resultant stego-block 2.
