| 滑动窗口混合加权法磁异常保真去噪研究 |
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| 引用本文： | 姚长利,何慧优,李淑玲,郭良辉.滑动窗口混合加权法磁异常保真去噪研究[J].地球物理学报,2009,52(11):2893-2902. |
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| 作者姓名： | 姚长利 何慧优 李淑玲 郭良辉 |
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| 作者单位： | 1.地下信息探测技术与仪器教育部重点实验室和地质过程与矿产资源国家重点实验室，北京 100083;2.中国地质大学(北京)地球物理与信息技术学院，北京 100083 |
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| 基金项目： | 国家863计划项目，高等学校学科创新引智计划 |
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| 摘 要： | 实测磁异常通常含有明显的噪声干扰，常用的滑动窗口平均滤波法虽然有明显的去噪效果，但对有意义的异常信号也会造成明显的幅值和宽度上的失真.S-G平滑滤波法具有异常形态保真的优点，但在平稳区的去噪效果欠佳.本文提出异常评价识别具体方法，并据此将平均法与S-G法动态加权融合，从而实现了既能对异常区进行信号的保护，又能在全区达到有效去噪的目的，为磁异常的有效去噪形成简单而有效的方法.
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| 关 键 词： | 磁异常 去噪 滑动窗口 加权 |
| 收稿时间： | 2009-8-12 |
| 修稿时间： | 2009-10-9 |
Denoising of magnetic data and anti-aliasing of the anomalies in a weighting procedure |
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| YAO Chang-Li,HE Hui-You,LI Shu-Ling,GUO Liang-Hui.Denoising of magnetic data and anti-aliasing of the anomalies in a weighting procedure[J].Chinese Journal of Geophysics,2009,52(11):2893-2902. |
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| Authors: | YAO Chang-Li HE Hui-You LI Shu-Ling GUO Liang-Hui |
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| Institution: | 1.Key Laboratory of Geo-detection (China University of Geosciences, Beijing), Ministry of Education, Beijing 100083, China; State Key Laboratory of Geological Processes and Mineral Resources, Beijing 100083, China;2.School of Geophysics and Information Technology, China University of Geosciences, Beijing 100083, China |
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| Abstract: | Noise is a notable feature of real magnetic data. The method of moving window averaging(named as AV filter) can generally get good results for denoising, but some distortion of widths and heights of anomalies can also appear in the processing. Another method called S-G filter has the ability of anti-aliasing of the anomalies, but its performance in denoising of data in the stable part falls down as compared with the AV filter. Based on the recognizing method of anomalies proposed in this paper, a weighted combination of AV and S-G filters was fulfilled and the purpose of anti-aliasing of the anomalies was achieved with effective denoising of data. The example shows that the process is simple, easy and stable with good effects. |
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| Keywords: | Magnetic anomalies Denoising Moving window Weighting |
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