IEICE TRANSACTIONS ON INFORMATION AND SYSTEMS, vol. E87D, no. 9, page. 2272 - 2276, 2004-09
JOURNAL OF ELECTRONIC IMAGING, vol. 13, no. 3, page. 602 - 612, 2004-07
IEICE TRANSACTIONS ON INFORMATION AND SYSTEMS, vol. E87D, no. 6, page. 1601 - 1605, 2004-06