In response to the problem of lacking of control base in the project of global mapping,a method to ortho-rectify satellite remote sensing images is proposed,which uses SRTM-DEM as control base.First, stereo images pairs which compose of optical images are adjusted by block adjustment of free networks and DEMs are extracted.Then SRTM-DEMis used as control base,the single DEM is the cell model and DEM block adjustment of independent models is implemented to get orientation parameters of each model. Finally,the geometric model parameters of each stereo image pair are corrected to ortho-rectify the nadir image.The ZY-3 images in Xianning and Jiangxi are taken as test data and the results show that the planar orientation accuracy of the pan nadir image is improved from 12.93 pixels to 6.85 pixels.%针对全球测图缺少统一的控制基准的问题,提出了利用SRTM-DEM作为控制基准,对光学卫星遥感影像进行正射纠正的方法.首先,对光学卫星影像构建的立体影像对进行自由网平差并制作DEM;然后,以SRTM-DEM作为控制,将DEM作为单元模型,进行独立模型法DEM区域网平差,获得单元模型的定向参数;最后,改正立体影像的成像几何模型参数,进行正射纠正.选取湖北咸宁和江西某地两个测区的资源三号数据进行试验,试验结果表明,资源三号正视全色影像的平面定向精度由12.93像素提高到6.85像素.
展开▼
