一种基于新质量图引导的干涉相位快速解缠方法

Fast Phase Unwrapping Method for Interferometric Phase Based on New Quality-Guided

提出了一种基于新质量图引导的干涉相位快速解缠方法。首先,介绍了一种新的质量图求取方法,该方法考虑到传统质量图不能精细地反映地形坡度变化的缺陷,提出利用局部表面法向量的余弦作为质量,通过局部平面拟合纠正相位跳跃点的质量值,取得了良好的效果。其次,对质量图的解缠方法进行了改进,利用分块融合技术降低路径搜索的计算量,大大减少了解缠所需的时间。仿真和实测数据处理结果验证了方法的有效性。

A fast phase unwrapping method guided by new quality map for interferometric phase was proposed.Firstly, those conventional quality maps coundn＇t finely reflect terrain slope variation, in order to overcome the disadvantage, a new quality map was proposed, and his new quality map was denoted by cosine of local surface normal and quality values of phase jump dotswere rectified by local plane-fitting. Secondly, an improved phase unwrapping method with a quality map was introduced, and this new technique simplified the route-searching processes by tessellating the whole wrapped phase map into blocks, which reduced the total processing time greatly. Experimental results, with simulated and real data, show that the proposed method is effective.