[1] [1] B. B. Hu and M. C. Nuss, Opt. Lett. 20, 1716 (1995).

[2] [2] D. M. Mittleman, R. H. Jocobsen, and M. C. Nuss, IEEE J. Sel. Top. Quantum Electron. 2, 679 (1996).

[3] [3] D. M. Mittleman, M. Gupta, R. Neelamani, R. G. Baraniuk, J. V. Rudd, and M. Koch, Appl. Phys. B 68, 1085 (1999).

[4] [4] Z. Jiang, X. Xu, and X. Zhang, Appl. Opt. 39, 2982 (2000).

[5] [5] L. Zhang, N. Karpowicz, C. Zhang, Y. Zhao, and X. Zhang, Opt. Commun. 281, 1473 (2008).

[6] [6] Y. Wang, Z. Zhao, Z. Chen, L. Zhang, K. Kang, and J. Deng, J. Infrared Millim. Waves 30, 193 (2011).

[7] [7] S. Ding, Q. Li, R. Yao, and Q. Wang, Appl. Opt. 49, 6834 (2010).

[8] [8] R. C. Gonzalez and R. E. Woods, Digital Image Processing (Publishing House of Electronics Industry, Beijing, 2007).

[9] [9] V. Jellus, W. Horger, and B. Kiefer, Magnetom Flash, 180, www.siemens.com/magnetom-world (2009).

[10] [10] P. Gorgel, A. Sertbas, and O. N. Ucan, J. Med. Syst. 34, 993 (2010).

[11] [11] H. H. Arsenault and D. Lefebvre, Opt. Lett. 25, 1567 (2000).

[12] [12] L. Xu, Digital Image Processing (in Chinese) (Science Press, Beijing, 2007).

[13] [13] S. Mickan, D. Abbott, J. Munch, X. Zhang, and T. van Doorn, Microelectron. J. 31, 503 (2000).

[14] [14] X. Zhang, Phy. Med. Biol. 47, 3667 (2002).

[15] [15] J. Yang, S. Yuan, and M. Zhang, Chin. Opt. Lett. 6, 29 (2008).

[16] [16] Q. Li, Q. Yin, R. Yao, S. Ding, and Q. Wang, Opt. Eng. 49, 037001 (2010).

[17] [17] S. C. Park, M. K. Park, and M. G. Kang, IEEE Signal Proc. Mag. 20, 21 (2003).

[18] [18] M. K. Ng and N. K. Bose, IEEE Signal Proc. Mag. 20, 62 (2003).

[19] [19] R. C. Hardie, K. J. Barnard, J. G. Bognar, E. E. Armstrong, and E. A. Watson, Opt. Eng. 37, 247 (1998).

[20] [20] M. Elad and A. Feuer, IEEE Trans. Image Processing 6, 1646 (1997).