[1] M. Kass, A.Witkin, and D. Terzopoulos, Int. J. Comput. Vis. 1, 321 (1988).

[2] X. Wang, L. Liu, and Z. Tang, Chin. Opt. Lett. 7, 931 (2009).

[3] H. Deng, J. Liu, and Z. Chen, Chin. Opt. Lett. 8, 24 (2010).

[4] V. Caselles, R. Kimmel, and G. Sapiro, Int. J. Comput. Vis. 22, 61 (1997).

[5] C. Xu and J. L. Prince, IEEE Trans. Image Process. 7, 359 (1998).

[6] T. F. Chan and L. A. Vese, IEEE Trans. Image Process. 10, 266 (2001).

[7] R. Ronfard, Int. J. Comput. Vis. 13, 229 (1994).

[8] C. Li, C. Xu, C. Gui, and M. D. Fox, in Proceedings of IEEE Conference on Computer Vision and Pattern Recognition 430 (2005).

[9] J. A. Sethian, Level Set methods and Fast Marching Methods: Evolving Interfaces in Computational Geometry, Fluid Mechanics, Computer Vision, and Materials Science (Cambridge University Press, New York, 1999).

[10] J.Weickert, B. M. ter Haar Romeny, andM. A. Viergever, IEEE Trans. Image Process. 7, 398 (1998).

[11] D. Wang, T. Zhang, W. Shi, Z. Wang, X. Yang, and L. Wei, Opt. Eng. 49, 037004 (2010).

[12] D. Chop, J. Comput. Phys. 106, 77 (1993).

[13] D. Adalsteinsson and J. Sethian, J. Comput. Phys. 118, 269 (1995).

[14] K. Zhang, H. Song, and L. Zhang, Pattern Recogn. 43, 1199 (2010).

[15] K. Zhang, L. Zhang, H. Song, and W. Zhou, Image Vis. Comput. 28, 668 (2010).

[16] L. Dice, Ecol. 26, 297 (1945).