| 加权最小二乘相位解缠的一种改进 |
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| 引用本文： | 董春敏,刘国林,于胜文,刘伟科,周伟.加权最小二乘相位解缠的一种改进[J].大地测量与地球动力学,2011,31(Z1):90-93,97. |
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| 作者姓名： | 董春敏 刘国林 于胜文 刘伟科 周伟 |
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| 作者单位： | 山东科技大学测绘科学与工程学院;海岛(礁)测绘技术国家测绘局重点实验室; |
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| 基金项目： | 国家自然科学基金(40874001); 海岛(礁)测绘技术国家测绘局重点实验室资助项目(2010A01) |
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| 摘 要： | 基于最小二乘相位解缠原理,针对现有的加权和不加权最小二乘在残差点过多时计算结果平滑问题,提出利用相位导数变化图对其进行加权改进。结合真实数据,通过现有的加权与不加权最小二乘算法的比较和分析,证明该改进算法能有效处理残差点过多的情况,解缠精度高,解缠结果更可靠。
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| 关 键 词： | InSAR 相位解缠 加权最小二乘 相位导数变化 残差 |
AN IMPROVED ALGORITHM OF WEIGHTED LEAST-SQUARES FOR PHASE UNWRAPPING |
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| Dong Chunmin,Liu Guolin,Yu Shengwen,Liu Weike,Zhou Wei.AN IMPROVED ALGORITHM OF WEIGHTED LEAST-SQUARES FOR PHASE UNWRAPPING[J].Journal of Geodesy and Geodynamics,2011,31(Z1):90-93,97. |
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| Authors: | Dong Chunmin Liu Guolin Yu Shengwen Liu Weike Zhou Wei |
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| Institution: | Dong Chunmin{1)},Liu Guolin{1,2)},Yu Shengwen{1)},Liu Weike{1)} and Zhou Wei{1)}1)Geomatics College,Shandong University of Science and Technology,Qingdao 2665102)Key Laboratory of Surveying and Mapping Technology on Island and Reef,State Bureau of Surveying and Mapping,Qingdao 266510 |
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| Abstract: | Phase unwrapping is the key step in topographic elevation mapping and reconstruction of three-dimensional terrain model by Interferometric Synthetic Aperture Radar(InSAR).Considering the problem that the existing weighted and unweighted least-squares phase unwrapping results need smoothing,an improved algorithm using phase derivative variance map based on the principle of Least-squares phase unwrapping is proposed.With the real InSAR data,by comparison of the improved algorithm with the existing weighted an... |
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| Keywords: | InSAR phase unwrapping weighted least-squares phase derivative variance residue |
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