基于合成孔径雷达影像目标点识别方法

Target point recognition method based on synthetic aperture radar image

为有效提升永久散射体点目标选取率和效率,本文总结了地基合成孔径雷达影像序列辐射校正原理和永久散射体选取的基本方法。基于矩阵实验室(MATLAB)平台,实现了多种单阈值永久散射体选取方法。针对单阈值法永久散射体目标选取的局限性,设计了多种阈值方法的组合策略,同时设计了点目标选取的验证方法以评价选取质量。对不同的应用场景和条件,对比分析不同永久散射体选取方法的适用性和稳定性。结果表明,组合阈值法结合了能够有效提升高质量永久散射体点目标选取率及效率,为后续地基合成孔径雷达干涉测量的时序分析提供保障。

To effectively improve the selection rate and efficiency of permanent scatterer point targets,this paper summarized the radiation correction principles of ground-based synthetic aperture radar image sequences and the basic methods for permanent scatterer selection.Based on the matrix laboratory(MATLAB)platform,various single-threshold permanent scatterer selection methods were implemented.Aiming at the limitations of the single-threshold method for permanent scatterer target selection,combination strategies of multiple threshold methods were designed,and the verification methods of point target selection were designed to evaluate the selection quality.For different application scenarios and conditions,the applicability and stability of different permanent scatterer selection methods were compared and analyzed.The results show that the combination threshold method can effectively improve the selection rate and efficiency of highquality permanent scatterer point targets,which provides support for the time-series analysis of subsequent ground-based synthetic aperture radar interferometry measurements.