基于残差点的质量阈值确定方法

Method for Determining the Quality Threshold Based on Residual Point

质量图指导的相位解缠过程中,选择质量阈值的大小,对相位解缠结果影响极大.利用干涉图中残差点的分布信息,来确定质量阈值数值的大小.并根据此数值将干涉相位图划分为高质量区域和低质量区域.以具体干涉数据为实验对象,对比质量阈值其他数值的解缠结果.实验结果表明,该方法确定的质量阈值,可以最大限度地减少干涉图中有效信息的流失,并减少了由残差点引起的相位跳变现象.

In the quality-map-guide phase unwrapping process, choosing the quality threshold, greatly influence the results of the phase unwrapping. In this paper, the interference distribution information of residual points is used to determine the quality threshold value. According to this value, the interferogram is divided into high quality regions and low quality regions. With real data, results of other threshold values are tested. The experimental results show that, the method of determining the quality threshold in this paper, can minimize the loss of effective information, and reduce the phase jump phenomenon caused by residual points.