The quasi-one-way function and its applications to image watermarking. - Kazuo Ohzeki; Engyoku Gi (IMCSIT, 2008)

Discontinuity in SVD Embedding Mapping Used for Watermarks. - Kazuo Ohzeki; Yuki Seo; Engyoku Gi (Int. J. Comput. Sci. Appl., 2010)