参照标准点探测PS法

Method of Detecting Persistent Scatterers According to Standard Points

提出参照标准点探测PS法。既考虑PS的强散射特性,又顾及其稳定性,且初选时振幅阈值的设置参照每景影像中PS标准点的振幅值,精选时振幅离差阈值的设置也参照这些PS标准点的振幅离差值,都不需要人工设定。选取澳门半岛为实验区,以18景TerraSAR-X为数据源,进行PS探测实验。结果表明,相比于传统的PS探测方法,本方法能更快速、有效、可靠地探测出SAR影像中的PS。

In order to detect PS more effectively, a method that detects PS according to several PS standard points is proposed in this paper. This method considers the stability as well as the strong characteristics of the PS scattering. In the original selection, the amplitude threshold is set according to the PS standard points. The amplitude dispersion threshold is also set according to them in the sec- ond selection. Both of the two thresholds do not need to be set manually, as they are hardly influenced by subjective factors. We conduct the PS detection experiments with 18 TerraSAR-X images that cov- er Macao Peninsula. The result shows that the proposed method can detect PS in the SAR image more rapidly, effectively and reliably than traditional methods.