| 基于多重小波的海洋重力异常畸变消除方法 |
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| 引用本文： | 赵池航,高成发,周百令.基于多重小波的海洋重力异常畸变消除方法[J].测绘学院学报,2006(4). |
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| 作者姓名： | 赵池航 高成发 周百令 |
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| 作者单位： | 东南大学交通学院 江苏南京210096(赵池航，高成发)，东南大学仪器科学与工程系 江苏南京210096(周百令) |
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| 基金项目： | 东南大学校基金资助(9221002246) |
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| 摘 要： | 分析了信号在多重小波算法下的表现形式,采用软阈值方法对经过多重小波变换后的重力异常信号的高频部分进行阈值处理。根据离散的重力异常状态方程,采用HGM多重小波进行了海洋重力异常数据仿真处理。理论分析和仿真处理表明:采用软阈值处理方法和联合软阈值处理方法以及特征值法阈值选择规则,都能在一定程度上消除海洋重力异常畸变。但在相同背景条件下,联合软阈值处理方法的性能优于软阈值处理方法。
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| 关 键 词： | 多重小波 重力异常 联合软阈值 |
Research on Multi-wavelet's Application to Elimination of Gravitational Abnormal Deform |
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| ZHAO Chi-hang,GAO Cheng-fa,ZHOU Bai-ling.Research on Multi-wavelet's Application to Elimination of Gravitational Abnormal Deform[J].Journal of Institute of Surveying and Mapping,2006(4). |
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| Authors: | ZHAO Chi-hang GAO Cheng-fa ZHOU Bai-ling |
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| Institution: | ZHAO Chi-hang~1,GAO Cheng-fa~1,ZHOU Bai-ling~2 |
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| Abstract: | The expressional form of signal under the condition of multi-wavelet's formula was analyzed,and the soft threshold method was used to process the high frequency part of the gravitational abnormal signal.Based on the discrete state equation of gravitational abnormality,HGM multi-wavelet was adopted to carry out the simulation experiments of alleviating gravitational abnormal distortion.Theoretical analysis and emulation experiments indicated that both methods were effective for alleviating Gravitational value,but the performance of the method of united soft threshold was better than the method of soft threshold under same background. |
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| Keywords: | multi-wavelet gravitational abnormal united soft threshold |
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