[1] Goodman J W. Some fundamental properties of speckle. J. Opt. Soc., 1976, 66(11):1145～1150

[5] Jiang Lihui, Wang Chunhui, Wang Qi et al.. Speckle noise suppressing based on a generalized parallel weighted-average morphological filtering algorithm. Chinese J. Laser (B), 2000 9(2):182～186

[6] Zhao ChunHui, Sun ShengHe, Qiao JingLu. A generalized morphological filter based on adaptive weighted average. Chinese J. Electronics, 1997, 6(3):76～81

[7] Letalick D, Renhorn I, Steinvall O. Measured signal amplitude distributions for a coherent FM-CW CO2 laser radar. Appl. Opt., 1986, 25(21):3927～3938

[8] Donoho D L. De-noising by -thresholding. IEEE Trans. on Information Technology, 1995, 41(3):613～627

[9] Lee J S. Speckle analysis and smoothing of SAR images. Opt. Engng., 1986, 26(5):636～643

[10] Dewaele P, Wambacq P, Oosterlinck A. Comparison of some speckle reduction techniques for SAR images. IGRASS′90, Maryland USA:the University of Maryland College Park,2417～2422