[4] [4] Abutaleb A S.Automatic thresholding of gray-level picture using two-dimensional entropies[J].Pattern Recognition,1989,47(1):22-32

[5] [5] Prasanna K Sahoo,Gurdial Arora.A thresholding method based on two-dimensional Renyi's entropy[J].Pattern Recognition,2004,37(6):1149-1161

[8] [8] WU Xue-jing,ZHANG Yi-jun,XIA Liang-zheng.A fast recurring two-dimensional entropic thresholding algorithm[J].Pattern Recognition,1999,32(12):2055-2061

[9] [9] Prasanna K Sahoo,Gurdial Arora.Image thresholding using two-dimensional Tsallis–Havrda–Charvát entropy[J].Pattern Recognition Letters,2006,27(6):520-528