基于最小费用流的InSAR干涉相位展开算法

Phase Unwrapping Based on the Minimum Cost Network Flow in SAR Interferometry

从影响InSAR干涉相位展开算法的相干系数出发,分析了相干系数对干涉处理的影响,提出了基于新的加权系数矩阵的最小费用流算法,定义了新的加权系数矩阵并分析其性能,使得加权系数矩阵不再随着幅度的变化而变化,减小了相干系数较小时对干涉相位展开的不利影响。通过仿真和实测数据检验本方法的处理性能,可以获得较好的相位展开处理效果。

Phase unwrapping is a key problem in all quantitative applications of synthetic aperture radar （SAR） interferometry. We present the minimum cost network flow algorithm which is based on the novel weighted coefficient. The proposed operation accounts for the coefficient characteristics and reduces the influence of the coefficient on phase unwrapping. The tests performed on simulated data and real data confirm the validity of our approach,