[1] [1] Yin L, Yang R K. Weighted median filters: a tutorial [J]. IEEE Trans. Circuits System, 1996, 43(3): 157～192

[2] [2] Sun T, Neuvo Y. Detail-preserving median based filters in image processing [J]. Pattern Recognition Letters, 1994, 15(4): 341～347

[3] [3] Eng H L, Ma K K. Noise adaptive soft-switching median filter[J]. IEEE Trans. Image Processing, 2001, 10(2): 242～251

[4] [4] Xing C J, Wang S J, Deng H J et al.. A new filtering algorithm based on extremum and median value[J]. J. Image and Graphics, 2001, 6(6): 533～536

[5] [5] Li Ziqin, Wang Qian. Edge similar degree and its application in the comparison of suppressing speckle noise algorithm[J]. Chin. J. Lasers, 2006, 33(5): 655～658

[6] [6] Yang Xia, Yu Qifeng, Fu Sihua. Adaptive window filter for electric speckle pattern interferometry fringe pattern[J]. Acta Optica Sinica, 2007, 27(4): 625～630

[7] [7] Vapnik V. The Nature of Statistical Learning Theory[M]. NY: Springer, 1995

[8] [8] Suykens J A K, Vandewalle J. Least squares support vector machine classifiers[J]. Neural Processing Letters, 1999, 9(3): 293～300

[9] [9] Su Gaoli, Deng Fangping. Introduction to model selection of SVM regression[J]. Bulletin of Science and Technology, 2006, 22(2): 154～158

[10] [10] Zong Siguang, Wang Jiang′an. Multi-scale mathematical morphology fusion filtering and the evaluation of the filtered image[J]. Acta Optica Sinica, 2005, 25(9): 1176～1180