Abstract：2D multi-level median filtering technique is a mature technique in signal processing,which has not only auto-adapted ability,but also has change-able feature of windows.The paper uses this tech-nique to eliminate the noises in seismic explo-ration,and emphasizes analysis of the relationship between the noise conditions and the length of fil-tering factor.The noise conditions defined by the paper include two factors:noise strength and noise distribution density.The effects of 2D multi-level median filtering are better by selecting the filtering length as 5 points when the noise conditions are fixed;changing the noise strength has no determi-nate role for selection of filtering length when noise density is fixed;changing noise density has significant influence on filtering length when noise strength is fixed.It is shown by practical data pro-cessing that the method not only can effectively suppress random noises,but also can reduce the shallow refraction interference in some degree.
刘财, 王典, 刘洋, 王培茂, 李勤学. 二维多级中值滤波技术在随机噪声消除中的应用初探[J]. 石油地球物理勘探, 2005, 40(2): 163-167.
LiuCai, Wang Dian, Liu Yang, Wang Pei-mao, LiQin-xue. Preliminary study of using 2D multi-level medianfiltering technique to eliminate random noises. OGP, 2005, 40(2): 163-167.
