电子学报2025，Vol.53Issue(4)：1153-1163,11.DOI:10.12263/DZXB.20240803
基于GMM的GB-InSAR图像PS点选择方法
PS Selecting Method of GB-InSAR Based on GMM
摘要
Abstract
Permanent scatterer(PS)selection is a crucial step in the processing of ground-based interferometric syn-thetic aperture radar(GB-InSAR).Existing methods rely on amplitude stability,phase stability or high coherence between pixels to select PS.Amplitude stability and phase stability are sensitive to phase fluctuations and may not well represent phase errors in some cases.The methods based on high coherence can easily lead to false detections due to their reliance on local windows.To address these issues,this paper analyzes the differences in the distribution characteristics of interferomet-ric phases between PS and non-PS in GB-InSAR.A new PS selection method based on Gaussian mixture model(GMM)is proposed.The method firstly selects enough PS as prior reference PS.Then,GMM is used to fit the probability distribution of the interferometric phases of the reference PS.Finally,the PS and non-PS are distinguished based on the matching degree between the interferometric phase series of all image pixels and the GMM.The results of measured data show that,compar-ing to the traditional methods based on amplitude and phase stability,when the number of obtained PS is close,the pro-posed method yields stronger coherence and higher degree of aggregating of phase series among the obtained PS.The PS obtained by GMM are with less residues than other methods.This demonstrates the method's ability to accurately select PS.关键词
永久散射体(PS)/地基干涉合成孔径雷达(GB-InSAR)/高斯混合模型(GMM)Key words
permanent scatterer(PS)/ground-based interferometric synthetic aperture radar(GB-InSAR)/Gaussian mixture model(GMM)分类
信息技术与安全科学引用本文复制引用
田卫明,王龙跃,高嵩,邓云开..基于GMM的GB-InSAR图像PS点选择方法[J].电子学报,2025,53(4):1153-1163,11.基金项目
国家重点研发计划(No.2021YFC3001903) National Key Research and Development Program of China(No.2021YFC3001903) （No.2021YFC3001903）
