[1] K. R. Castleman, Digital Image Processing (Prentice Hall, New Jersey, 1995).
[2] G. Aubert and P. Kornprobst, Mathematical Problems in Image Processing: Partial Differential Equations and the Calculus of Variations (Springer-Verlag, New York, 2001).
[3] C. Cai, M. Ding, C. Zhou, and T. Zhang, Chin. Opt. Lett. 2, 268 (2004).
[4] P. Perona and J. Malik, IEEE Trans. Pattern Anal. Machine Intell. 12, 629 (1990).
[5] L. Alvarez and L. Mazorra, SIAM J. Numer. Anal. 31, 590 (1994).
[6] S. J. Osher and L. I. Rudin, SIAM J. Numer. Anal. 27, 919 (1990).
[7] L. A. Zadeh, Information and Control 8, 338 (1965).
[8] W. Chen, X. Lu, J. Chen, and G. Wu, Science in China (Series A) 38, 1272 (1995).
[9] R. Liu and Q. Shu, Some New Methods in Computing Fluid Dynamics (Science Press, Beijing, 2004).