Data Hiding Based on Palette Images Using Weak Bases of Z2-Modules

Many steganography schemes were invented for the purpose of safe communication. Such previous schemes often show good and reasonable performance, however, few have been based on paletted images; it is not easy to invent good steganographic schemes with little evidence of data hiding. In this paper, we propose new hiding schemes (r, N, k) based on binary images. The proposed hiding scheme (r, N, k) applied to paletted images using the Optimal Parity Assignment (OPA) approach. Experimental results show that the proposed palette-scheme (3,18,9) exhibits good performance compared to that of previous schemes.