2Otsu N. A Threshold Selection Method from Gray-Level Histograms. IEEE Transactions on Systems , Man, and Cy- bernetics, 1979, 9(1):919-926.
3Kass M ,Witkin A,Terzopulos D. Snakes:Active Contour Mod- els[J]. Int 1 Journal of Computer Vision,1987,1(4):321-331.
4Cohen L D. On Active Contour Models and Balloons [J]. CVGIP: Image Under,1991,53(2): 112N218.
5Caselles V,Catte F, TColl, et al. A Geometric Model for Ac- tive Contours[J]. Numeric Mathematik,1993,66(1):1-31.
6Kimia B B, Tannenbaum A R, Zucker S W. Shapes, Shocks, and Deformations I: The Components of Two-Dimensional Shape and the Reaction-Diffusion Space[J]. Int.1 Journal of Computer Vision, 1995,8:189-224.
70sher S, Sethian J. Fronts Propagating with Curvature De- pendent Speed: Algorithms Based on Hamihon-Jacobi For- mulations[J]. Comput Phys,1988,79(1): 12-49.
8Udupa J K, Wei L, Samarasekera S, et al. Multiple Sclerosis Lesion Qualification Using Fuzzy-Connectedness Principle[J]. IEEE Trans on Med Imaging,1997,16(5): 598-609.
9P. Anandan. A Unified Perspective on Computational Te- chniques for the Measurement of Visual Motion. In Interna- tional Conference on Computer Vision, 1987. London.
10C.T.Zahn,GraPh-Theoretic Methods for Detecting and De- seribing Gestalt Clusters. IEEE Transactions on Computing, 1971, 20:68-86.
