Data Hiding in Halftone Images Using Error Diffusion Halftoning Method with Adaptive Thresholding

DHSED is a watermarking algorithm to embed hidden binary visual patterns in two error diffused halftone images such that the hidden patterns can be visually inspected when the images are overlaid. A drawback of the DHSED method is that if the image has large areas of the same grey-level, hiding data causes some edge effects which may reveal the hidden data. In this paper we propose an improvement to the DHSED which fairly reduces the edge effects.

کلیدواژه ها:

Watermarking ، Halftoning ، Error Diffusion ، Adaptive Thresholding