CAJ | 학술논문

对于重叠区域较小的相邻两条带SAR图像，严重几何畸变使得难以直接提取同名点(Tie Points, TPs)。该文基于InSAR图像成像信息和相干信息提出一种新的同名点提取方法。该方法首先根据成像信息对原始图像进行仿射变换，然后利用光学影像特征匹配的方法获得同名点，最后以相干系数图为导引对同名点进行筛选。通过对实际InSAR数据(重叠区域<15%)的处理，该方法不仅能够自动提取同名点，而且提取的同名点满足高精度的干涉测图要求。同时使得一幅高精度正射图像由5个条带减少到3个条带拼接，大大降低了测图作业量和测图成本。
대우중첩구역교소적상린량조대SAR도상，엄중궤하기변사득난이직접제취동명점(Tie Points, TPs)。해문기우InSAR도상성상신식화상간신식제출일충신적동명점제취방법。해방법수선근거성상신식대원시도상진행방사변환，연후이용광학영상특정필배적방법획득동명점，최후이상간계수도위도인대동명점진행사선。통과대실제InSAR수거(중첩구역<15%)적처리，해방법불부능구자동제취동명점，이차제취적동명점만족고정도적간섭측도요구。동시사득일폭고정도정사도상유5개조대감소도3개조대병접，대대강저료측도작업량화측도성본。
For SAR images of two adjacent strips with the smaller overlapping area, the severe geometric distortion makes it difficult to extract directly the Tie Points (TPs). Based on imaging information and coherent information of the InSAR images, this paper puts forward a new method for extracting TPs. First, it makes the raw image process the affine transformation with the imaging information;and then it uses the feature matching method of optical image to obtain TPs;finally, the TPs are selected according to the quality map. Experiments on the real InSAR data (overlap region <15%) demonstrate that it can not only automatically extract TPs, but also the extracted TPs meet the requirements for the interferometric mapping of some scale. At the same time, it makes the number of strips reduce from five to three joining together for an image of some scale, which decrease greatly the mapping work and mapping cost.