摘要
本文将航片扫描后,在计算机中对数字航片经过第一次几何纠正,消除了象片倾斜误差,在此基础上,利用地图上的等高线,生成梯田式数字地面模型,根据数字地面模型上各模型点的X、Y、Z坐标位置,找到各模型点的应有象素,填入目的图像中,从而消除象片上由于地形起伏引起的投影差,实现单张像片的数字分带纠正。
The first geometric rectification is done for digital aero - photograph after the aero - photograph is scanned, in order to delete the oblique error of aero -photograph. Then using the contour on the map, the digital terrain model(DTM) is established. According to the coordinate of a point on the DTM, the imaging point on the rectified digital aero - photograph of the model point is computed by the formula of relief displacement, the corresponding picture element of the model point is filled into the target imagine, so that to delete the relief displacement because of topographic undulation. Then digital zonal rectification of single aero - photograph is realized.
出处
《江苏测绘》
1998年第4期32-37,共6页
Jiangsu Surveying and Mapping
关键词
几何纠正
数字地面模型
数字图象
分带纠正
航片
geometric rectification contour digital terrain model (DTM) the zonal rectification of digital imagine
