Tree-Based Parity Check for an Optimal Data Hiding Scheme

Reducing distortion between the cover object and the stego object is an important issue for steganography. The tree-based parity check method is very efficient for hiding a message on image data due to its simplicity. Based on this approach, the authors propose a majority vote strategy that results in least distortion for finding a stego object. The lower embedding efficiency of their method is better than that of previous works when the hidden message length is relatively large.