小波阈值去噪方法在重力资料处理中的应用  

Application of wavelet threshold de-noising method in gravity data processing

作　　者：高铁[1] 徐英奎[1] 颜萍[1] 吴燕冈[1] 

机构地区：[1]沈阳地质调查中心方法室

出　　处：《物探化探计算技术》2014年第5期566-570,共5页Computing Techniques For Geophysical and Geochemical Exploration

基　　金：沈阳地质矿产研究所自设项目(2012007)

摘　　要：简要介绍了小波变换的基本理论与小波阈值去噪实现过程。通过单球体与双球体模型试验,探讨了阈值去噪时小波基以及分解层数的选择问题;最后利用小波阈值去噪方法,对某实测布格重力资料进行处理,有效滤除了随机噪声。去噪后计算的水平方向导数明显比去噪前直接计算的水平方向导数效果好。In this paper,the basic theory of wavelet transform and the process of wavelet threshold denoising are intro-duced.Then,we discussed the criterion for wavelet bases and scales to be selected by establishing single sphere and double spheres models and doing various experiments on the gravity of the models.Finally,the wavelet threshold de-noising method is applied to practical gravity data,and the result is completely denoised.Directional derivatives calculated from the denoised data are more effective than that calculated from the original data.

关 键 词：小波阈值去噪 小波基 分解层数 重磁资料 

分 类 号：P631.1[天文地球—地质矿产勘探]