Madoka Hasegawa, Shigeo Kato,"Scalable Coding of Dithered Images Based on the Concept of Schalkwijk Code," IIAS-Trans. on Systems Research and Cybernetics, Vol.IV, No.2, pp.7-10, Dec. 2004.
Jun Watanabe, Madoka Hasegawa, Shigeo Kato,"A Study on a Watermarking Method for Both Copyright Protection and Tamper Detection," The IEEE International Conference on Image Processing 2004 (ICIP2004), Singapore, pp.2155-2158, Oct. 2004.
Jun Watanabe, Madoka Hasegawa, Shigeo Kato,"A Robust and Fragile Watermarking Method," The 2004 International Workshop on Spectral Methods and Multirate Signal Processing (SMMSP2004), Vienna, Austria, pp.211-216, Sept. 2004.
Shigeo Kato, Madoka Hasegawa,"Data Hiding Method in Adaptive Lossless Coding Scheme," IIAS-Trans. on Systems Research and Cybernetics, Vol.IV, No.1, pp.49-52, Aug. 2004.