Data Hiding Using Multi-Pixel Difference Expansion

This paper proposed a reversible multiple layer data hiding to improve the method proposed by Arham et al. Using the relevance of pixels to modify the block size and change the scan mode can enhance image embedded capacity so that the maximum embedding amount of the original block was increased from 3 bits to 8 bits. For multiple-layer embedding, we modified the multiple-layer embedding method proposed by Alattar by changing the quad permutations for recursive embedding to nine permutations to avoid the distortion and overflow/underflow. The experimental results showed that our method achieves higher hiding capacity and better image quality for stego-images.