基于相干曲面移动拟合的SAR影像高精度配准方法
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摘要
本文采用斜距-多普勒模型与卫星轨道状态矢量探查影像粗配准点,以粗配准像素中心及其邻域相干系数阵列拟合相干曲面,通过快速求解二元连续相干函数的极值点作为影像精细配准位置,建立主从影像同名像素的坐标映射转换模型。实验分别以我国东部平原地区的ERS SAR影像和西部龙门山地区的ALOS PALSAR影像为例,进行InSAR影像配准与干涉计算,结果表明,SAR影像配准后的相干性提高约5%。
In the paper,the satellite orbital state vector and slang-range Doppler model were first used to seek the coarse matched pixel. The mathematical model was fitted based on the coherence values of central pixel and its adjacent pixels. The accurate position of matched point was obtained by computing the maximum value of fitted surface function. The matched homologous points were employed to establish the coordinate transformation relationship between master acquisition and slave image. The ERS-1 /2 SAR images covering Shanghai plain area and ALOS PALSAR images covering Longmenshan mountainous area were respectively used in the study.The testing results showed that the coherence could be improved by about 5%.
In the paper,the satellite orbital state vector and slang-range Doppler model were first used to seek the coarse matched pixel. The mathematical model was fitted based on the coherence values of central pixel and its adjacent pixels. The accurate position of matched point was obtained by computing the maximum value of fitted surface function. The matched homologous points were employed to establish the coordinate transformation relationship between master acquisition and slave image. The ERS-1 /2 SAR images covering Shanghai plain area and ALOS PALSAR images covering Longmenshan mountainous area were respectively used in the study.The testing results showed that the coherence could be improved by about 5%.
引文
[1]许才军,林敦灵,温扬茂.利用InSAR数据的汶川地震形变场提取及分析[J].武汉大学学报·信息科学版,2010,35(10):1138-1142.
[2]刘国祥,丁晓利,李志林,等.使用InSAR建立DEM的试验研究[J].测绘学报,2001,30(4):336-342.
[3]舒宁.雷达影像干涉测量原理[M].武汉:武汉大学出版社,2003.
[4]陈强,丁晓利,刘国祥,等.雷达干涉PS网络的基线识别与解算方法[J].地球物理学报,2009,52(9):2229-2236.
[5]王艳,廖明生,李德仁,等.利用长时间序列相干目标获取地面沉降场[J].地球物理学报,2007,50(2):598-604.
[6]何秀凤,仲海蓓,何敏.基于PS-InSAR和GIS空间分析的南通市区地面沉降监测[J].同济大学学报·自然科学版,2011,39(1):129-134.
[7]谢仁伟,等.基于控制点库的SIFT多源影像自动配准方法[J].测绘科学,2011,36(4).
[8]曾琪眀,解学通.基于谱运算的复相关函数法在干涉复图像配准中的应用[J].测绘学报,2004,33(2):128-131.
[9]刘磊,王志勇.基于DEOS精密轨道数据和插值的InSAR高精度配准方法[J].山东科技大学学报,2008,27(6):9-15.
[10]Kampes B M,Hanssen R F,Perski Z.Radar Interferometry with Public Domain Tools[C]//Proc.FRINGE 2003Workshop,Frascati,Italy,2003,December 1-5.
[2]刘国祥,丁晓利,李志林,等.使用InSAR建立DEM的试验研究[J].测绘学报,2001,30(4):336-342.
[3]舒宁.雷达影像干涉测量原理[M].武汉:武汉大学出版社,2003.
[4]陈强,丁晓利,刘国祥,等.雷达干涉PS网络的基线识别与解算方法[J].地球物理学报,2009,52(9):2229-2236.
[5]王艳,廖明生,李德仁,等.利用长时间序列相干目标获取地面沉降场[J].地球物理学报,2007,50(2):598-604.
[6]何秀凤,仲海蓓,何敏.基于PS-InSAR和GIS空间分析的南通市区地面沉降监测[J].同济大学学报·自然科学版,2011,39(1):129-134.
[7]谢仁伟,等.基于控制点库的SIFT多源影像自动配准方法[J].测绘科学,2011,36(4).
[8]曾琪眀,解学通.基于谱运算的复相关函数法在干涉复图像配准中的应用[J].测绘学报,2004,33(2):128-131.
[9]刘磊,王志勇.基于DEOS精密轨道数据和插值的InSAR高精度配准方法[J].山东科技大学学报,2008,27(6):9-15.
[10]Kampes B M,Hanssen R F,Perski Z.Radar Interferometry with Public Domain Tools[C]//Proc.FRINGE 2003Workshop,Frascati,Italy,2003,December 1-5.
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