| 多波段InSAR差分滤波相位解缠方法 |
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| 引用本文： | 靳国旺,张红敏,徐青,秦志远,施全杰.多波段InSAR差分滤波相位解缠方法[J].测绘学报,2012,41(3):434-440,448. |
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| 作者姓名： | 靳国旺 张红敏 徐青 秦志远 施全杰 |
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| 作者单位： | 1. 信息工程大学测绘学院,河南郑州450052／中国科学院电子学研究所微波成像技术国家级重点实验室,北京100190
2. 信息工程大学测绘学院,河南郑州,450052 |
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| 基金项目： | 国家自然科学基金，国家863计划，中国博士后科学基金，国家西部1:50000地形图空白区测图工程 |
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| 摘 要： | 依据干涉图零中频矢量滤波经验,设计了多波段InSAR干涉图的差分滤波相位解缠方法。该方法将较短波长干涉图与较长波长干涉图的解缠结果进行差分处理,以降低干涉条纹频率,提高滤波效果和相位解缠性能,从而以较长波长干涉图的解缠结果指导较短波长干涉图的相位解缠。充分利用不同波段干涉图之间的互补相位信息,提高相位解缠的可靠性和解缠精度。采用由DEM仿真的多波段干涉图进行了相位解缠试验,得到了满意的解缠结果,验证了该解缠方法的有效性。
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| 关 键 词： | 合成孔径雷达干涉测量 多波段 差分 滤波 相位解缠 |
Phase Unwrapping Algorithm with Difference Filter for Multi-band InSAR |
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| JIN Guowang,ZHANG Hongmin,XU Qing,QIN Zhiyuan,SHI Quanjie.Phase Unwrapping Algorithm with Difference Filter for Multi-band InSAR[J].Acta Geodaetica et Cartographica Sinica,2012,41(3):434-440,448. |
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| Authors: | JIN Guowang ZHANG Hongmin XU Qing QIN Zhiyuan SHI Quanjie |
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| Institution: | 1.Institute of Surveying and Mapping,Information Engineering University,Zhengzhou 450052,China;2.National Key Laboratory of Science and Technology on Microwave Imaging,Institute of Electronics,Chinese Academy of Sciences,Beijing 100190,China |
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| Abstract: | A new phase unwrapping algorithm with difference filter for multi-band InSAR was designed by taking zero intermediate frequency vector filtering of interferogram for reference.It differences the interferogram with shorter wavelength to the one with longer wavelength to reduce the frequencies of fringes,as can improve the effects of filtering and phase unwrapping.It unwraps the phases with shorter wavelength based on the unwrapped phases with longer wavelength.All the phases in interferograms with different bands are used in phase unwrapping,so the reliability and the precision of phase unwrapping are improved.The simulated multi-band interferograms from DEM were applied in phase unwrapping experiments.The unwrapped phases were satisfying,as validated the proposed phase unwrapping algorithm. |
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| Keywords: | InSAR multi-band difference filter phase unwrapping |
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