An information sharing scheme in halftone images based on multi-scale error diffusion

This research presents an information sharing scheme in halftone images. Some gray-level images of the same resolution are selected and transferred to halftone ones, which are responsible for carrying a secret halftone image. Given the pixels of secret image as the constraint, the host images are generated using Multi-scale Error Diffusion (MED). The original pixels of host images are examined and the modified MED ensures that the pixels of the host images should satisfy the required conditions. After grouping all the processed halftone images, the secret image can be successfully revealed. The research objective is maintaining the quality of all the halftone images in this information sharing scenario. The experimental results demonstrate the interesting characteristics of the proposed scheme.