【摘要】 影像的高精度正射校正需要合适的控制点和DEM,但高分辨率的DEM往往较难获取。鉴于此,利用4种不同尺度的DEM生成高景一号卫星正射影像,并对其精度进行了评价和对比分析,以期为其正射校正实际应用选择何种尺度的DEM提供参考依据。结果表明,在丘陵区域开源DEM可使正射影像平面位置精度的均方根误差优于3 m,而采用5 m格网间距的DEM可使其精度提升至1.5 m。更多还原

【Abstract】 The high-precision orthorectification of image needs appropriate control points and DEM, but the high-resolution DEM is often difficult to obtain. In this paper, we used four kinds of DEM with different scales to generate the orthoimages of Super View-1 satellite, and evaluated and compared their accuracy, so as to provide a reference for choosing which scale of DEM for the practical application of orthorectification. The results show that the open-source DEM in the hilly area can make the RMSE of the plane position accuracy of orthoimages better than 3 m, and the DEM with 5 m grid spacing can improve its accuracy to 1.5 m.更多还原