Reversibly Visible Polygons and Polygonal Approximation in Two Dimensional Space. - Sasipalli V. S. Rao; Harada Koichi (Computer Graphics International, 1997)

Hybrid Topology based Watermarking Method for Reconstructed Triangular Mesh Surface. - Mahfuzur Rahman; Harada Koichi (IMECS, 2006)

Watermarking Method for Copyright Protection and Retrieval of 2D/3D Model. - Mahfuzur Rahman; Harada Koichi (IMECS, 2006)

A connected component labeling algorithm for grayscale images and application of the algorithm on mammograms. - Roshan Dharshana Yapa; Harada Koichi (SAC, 2007)