Comparison of image alignment on hexagonal and square lattices. - Tetsuo Shima; Shigeki Sugimoto; Masatoshi Okutomi (ICIP, 2010)

Design and Evaluation of More Accurate Gradient Operators on Hexagonal Lattices. - Tetsuo Shima; Suguru Saito; Masayuki Nakajima 001 (IEEE Trans. Pattern Anal. Mach. Intell., 2010)

Optimal Differential Filter on Hexagonal Lattice. - Suguru Saito; Masayuki Nakajima 001; Tetsuo Shima (Computational Intelligence Paradigms in Advanced Pattern Classification, 2012)