| 多环带中值滤波法实现重力区域场与局部场的划分 |
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| 引用本文： | 马国庆,孟令顺,杜晓娟.多环带中值滤波法实现重力区域场与局部场的划分[J].世界地质,2010,29(1):113-117. |
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| 作者姓名： | 马国庆 孟令顺 杜晓娟 |
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| 作者单位： | 吉林大学,地球探测科学与技术学院,长春,130026 |
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| 基金项目： | 国家发展和改革委员会项目 |
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| 摘 要： | 重力区域场与局部场的划分是重力资料解释中的重要步骤之一。在考察空间域和波数域划分重力区域场与局部场常用方法的基础上, 提出了多环带中值滤波法。该方法以计算点为中心建立多个环带, 计算出各个环带的中值和均方差, 按照事先设定的条件进行筛选, 将满足条件的环带中值作为该点的区域场值, 从重力异常中减去区域场后得到局部场。理论模型与实际资料的处理结果表明, 该方法适应性强, 划分出的场畸变小, 并且能够很好地保留异常之间的界限特征。
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| 关 键 词： | 区域重力场 局部重力场 多环带中值滤波 场划分 |
Division of regional gravity field and local gravity field by multi-ring median filtering method |
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| MA Guo-qing,MENG Ling-shun,DU Xiao-juan.Division of regional gravity field and local gravity field by multi-ring median filtering method[J].World Geology,2010,29(1):113-117. |
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| Authors: | MA Guo-qing MENG Ling-shun DU Xiao-juan |
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| Institution: | College of Geoexploration Science and Technology, Jilin University, Changchun 130026, China |
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| Abstract: | The division of regional gravity field and local gravity field is one of the important steps in gravity data interpre-tation. On the basis of inspecting common methods in dividing regional gravity field and local gravity field by spatial domain and frequency domain, the authors propose multi-ring median filteringmethod. This method builds multiple rings using calculated point as the center, calculates the median and the mean variance of each ring, and process filter under presettable conditions to take the median which meet the condition of ring as the point of regional field value and get local field by removing regional field in gravity anomaly. The results of theoretical model and actual data show multi-ring median filtering method is adaptable, which carrying out smaller field distortion, and the method can well retain the boundary characteristics between anomalies. |
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| Keywords: | regional gravity field local gravity field multi-ring median filtering field division |
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