| 基于小波阈值的海洋磁力测量数据消噪方法 |
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| 引用本文： | 于波,翟国君,刘雁春,肖付民.基于小波阈值的海洋磁力测量数据消噪方法[J].测绘科学,2009,34(5). |
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| 作者姓名： | 于波 翟国君 刘雁春 肖付民 |
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| 作者单位： | 1. 大连舰艇学院海测工程系,辽宁大连,116018
2. 天津海洋测绘研究所,天津,300061 |
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| 摘 要： | 波浪噪声和随机噪声是影响海洋磁力测量数据处理精度的重要因素。基于小波变换理论,研究了海洋磁力测量数据中的波浪和随机噪声的消除方法。首先对带有噪声的实测磁异常数据进行频谱分析,确定相应的多分辨分析尺度。分别采用滑动拟合法、基于小波高频系数置零的消噪方法、基于小波阈值消噪方法进行消噪计算。实例计算表明:基于小波阈值消噪方法能够将磁异常中的噪声和真实的高频信息分离开来,进一步提高了消噪的精度和可靠性。
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| 关 键 词： | 海洋磁力测量 小波阈值消噪 滑动拟合 小波变换 |
Data denoising based on Wavelet threshold in marine magnetic survey |
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| YU Bo,ZHAI Guo-jun,LIU Yan-chun,XIAO Fu-min.Data denoising based on Wavelet threshold in marine magnetic survey[J].Science of Surveying and Mapping,2009,34(5). |
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| Authors: | YU Bo ZHAI Guo-jun LIU Yan-chun XIAO Fu-min |
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| Abstract: | Wave noise and random noise are remarkable factors in influencing accuracy of processing of marine magnetic survey.A new de-noising algorithm based on wavelet threshold is presented to improve the precision of de-noising.Frequency-spectral analysis for magnetic anomaly with noise is given to decide the scale of wavelet multi-resolution analysis.By the calculation,it is shown that the new algorithm can effectively separate noise and actual high frequency and improve the precision and reliability of de-noising. |
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| Keywords: | marine magnetic survey wavelet threshold de-noising slide-fitting wavelet transform |
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