| 中值滤波器对信号相位和形状影响的研究 |
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| 引用本文： | 冯晻,刘财,杨宝俊,李哲,张凤琴,刘洋.中值滤波器对信号相位和形状影响的研究[J].石油物探,2002,41(1):37-41,35. |
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| 作者姓名： | 冯晻 刘财 杨宝俊 李哲 张凤琴 刘洋 |
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| 作者单位： | 吉林大学朝阳校区地球物理系,吉林长春,130026 |
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| 摘 要： | 中值滤波器具有许多优点,已经在VSP等地震资料处理中得到较为广泛的应用。由于中值滤波器是一种非线性滤波器,对尖脉冲的响应是零,在傅氏域没有“真正”的振幅普和相位谱,所以了解其特性比了解线性滤波器特性要困难得多。然而许多简单的数值方法可合理、直观地了解这种滤波器在地震资料中的作用。其中,通过研究它对各种信号的响应来了解其性质是一种有效而实用的方法。在此方法基础上分析了中值滤波器的特性。
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| 关 键 词： | 中值滤波器 信号 影响 研究 非线性滤波器 子波形状 相位特征 地震勘探 |
| 文章编号： | 1000-1441(2002)01-0037-05 |
| 收稿时间： | 2001-2-16 |
| 修稿时间： | 2001-5-14 |
The impacts of median filter to the phases and shapes of signals |
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| Feng Xuan,Liu Cai,Yang Baojun,Li Zhe,Zhang Fengqin,Liu Yang.The impacts of median filter to the phases and shapes of signals[J].Geophysical Prospecting For Petroleum,2002,41(1):37-41,35. |
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| Authors: | Feng Xuan Liu Cai Yang Baojun Li Zhe Zhang Fengqin Liu Yang |
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| Affiliation: | Dept. of Geophysics, Jilin University, Chaoyang Campus, Changchun 130026,China |
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| Abstract: | Although median filter has been widely used in seismic data processing, especially in processing of VSP data due to its many merits, it is difficult to understand the behaviors of the median filter, because it is one kind of nonlinear filter with zero response to spike pulse, and has no "actual" amplitude and phase spectrum. However, the effects of the filter can still be analyzed via many straightforward numerical means. Among them analysis of its responses to different signals is an effective and practical way to study the behaviors of the filter. Some characteristics of the median filter are presented in the paper. |
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| Keywords: | median filter nonlinear filter wavelet shape phase characteristic |
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