Registration and phase unwrapping algorithms for InSAR images with dense residues

doi:10.11834/jrs.20090107

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Registration and phase unwrapping algorithms for InSAR images with dense residues
Vol. 13, Issue 1, Pages: 54-59(2009)
Published：2009
DOI： 10.11834/jrs.20090107
稿件说明：

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[1]魏志强,金亚秋.密集残差点区域的解缠算法[J].遥感学报,2009,13(01):54-59. DOI： 10.11834/jrs.20090107.

Registration and phase unwrapping algorithms for InSAR images with dense residues[J]. Journal of Remote Sensing, 2009, 13(1): 54-59. DOI： 10.11834/jrs.20090107.

摘要

针对其他路径跟踪相位解缠算法对密集残差点的干涉图像解缠的不足

提出适用于残差点不同分布的两种路径跟踪相位解缠算法:区域分片连接法和中心扩展搜索法。这两种方法能有效地避免过长的枝切线和残差点的多次连接

既提高了解缠精度

又保留了路径跟踪法在运算速度上的优势。将上述方法应用于ENVISAT-ASAR图像

结果证明了本文方法是一种有效的InSAR处理方法。

Abstract

This paper introduces a procedure of Interferometric SAR（InSAR）processing

including the algorithms of image registration and phase unwrapping.A coarse-to-fine fast registration framework

based on the mean square difference function

is proposed.Aiming at the interferogram with large size and dense residues

two unwrapping algorithms are presented:one is the multi-patches method to connect opposite residues

and another one the center expanding method to search opposite residues.These two algorithms can avoid long branch cuts and excessive connection of residues

and are well employed in the experiments of ENVISAT-ASAR datasets.Compared with conventional methods

our results of registration and unwrapping show good advantages in InSAR data processing.