3Ports J C, Yerri D G, Surya B Y. The development and evolution of an improved genetic algorithm based on migration and artifical selection[ J ]. IEEE Transaction on SMC, 1994, 24 (1):73-86.
4Aburaleb A S. Automatic thresholding of gray - level pictures using two- dimension entropy[ J ]. Computer Vislon, Graphics and Image Processing, 1989(47): 22 - 32.