An Image Segmentation Method for Function Approximation of Gradation Images. - Kentaro Miyamoto; Tetsuo Kamina; Tetsuo Sugiyama; Keisuke Kameyama; Kazuo Toraichi (SPPRA, 2006)

A Function Approximation Method for Images with Grading Regions. - Kentaro Miyamoto; Tetsuo Kamina; Tetsuo Sugiyama; Keisuke Kameyama; Kazuo Toraichi; Yasuhiro Ohmiya (Int. J. Image Graph., 2009)