基于最少残余点数的InSAR复图像配准

提出了一种基于最少残余点数法的干涉合成孔径雷达(InSAR)复图像配准新算法。通过分析引起干涉相位图残余点的因素,以及残余点与相位图的信噪比和平均波动函数之间的内在联系,提出可以用相位图的残余点数最少作为InSAR复图像配准的评价测度。新算法的计算量比传统的最大干涉频谱法要小而且更稳定,与平均波动函数法相比则计算量相当但不受相位跳变的影响。试验结果验证了新算法的有效性。

InSAR SLC Based on Minimal Residues

A new coregistration algorithm of InSAR SLC based on the minimal residues was proposed.This paper pointed out that the minimal residues could be as the evaluating function by analyzing the factors which caused the residues in the interferogram as well as the intrinsic relation between residues and the signal-noise ratio and the average fluctuation function of the phase difference image.The computation of the new algorithm is smaller than the conventional max-spectrum algorithm and the new algrithm is more stable.The computation of the new algorithm is almost the same as the average fluctuation function algorithm but the new algorithm is not influenced by the phase leap.The simulations verified the validity of this new algorithm.