Watermarked Data Hiding for Binary Images by Two Stage Referencing

This paper proposes a new data hiding method for twocolor images by two stage referencing. The cover image is partitioned into n x n non-overlapping sub-blocks, and calculated different values by two stages for all pixel to find the suitable replacement pixel. For a one stage, neighboring pixels with (n + 2) x (n + 2) are used to obtain difference value which is different with the current pixel value and (n + 4) x (n + 4) pixels are referenced for next stage. These two values are used to embed a secret bit on a subblock. The experimental results show that the proposed method achieves a good visual quality for the watermarked image and a high capacity for various n x n sub-block.

Ubiquitous Multimedia Computing, International Symposium on 13-15 Oct. 2008. Page(s). 206-209