An Error Diffusion Based Algorithm for Hiding an Image in Distinct Two Images. - Xia Zhuge; Koji Nakano (CSSE (3), 2008)

Clipping-Free Halftoning and Multitoning Using the Direct Binary Search. - Xia Zhuge; Koji Nakano (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2009)

Halftoning via Error Diffusion using Circular Dot-overlap Model. - Xia Zhuge; Koji Nakano (J. Digit. Content Technol. its Appl., 2010)