An Algebraic Approach to the Generation and Description of Binary Pictures. - Takeshi Agui; Masayuki Nakajima 001; Yukihiro Arai (IEEE Trans. Pattern Anal. Mach. Intell., 1982)

An Automatic Interpolation Method of Grayvalued Images Utilizing Density Contour Lines. - Takeshi Agui; Minoru Saito; Masayuki Nakajima 001; Yukihiro Arai (Eurographics, 1987)