Planar Block Adjustment and Orthorectification of ZY-3 Satellite Images
Planar Block Adjustment and Orthorectification of ZY-3 Satellite Images
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DOI：
10.14358/pers.80.6.559-570
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发表时间：
2014-06-01
影响因子：
1.3
通讯作者：
Zhu, Xiaoyong
中科院分区：
文献类型：
--
作者：
Wang, Taoyang;Zhang, Guo;Zhu, Xiaoyong
针对弱几何收敛条件下无法解决的卫星影像区域网平差问题，提出了一种利用平面区域网平差方法求解所有卫星影像的方位参数，然后对每幅卫星影像进行正射纠正的策略。该方法既保证了定位精度的一致性，又保证了相邻正射影像相对位置的严格性。对ZY-3卫星139张全色天底图的测试表明，仅使用少量平面精度为5 m的地面控制点（GCP），平面区域平差后独立检查点（ICP）的平面精度优于7 m。该精度满足我国1：5万地形图的精度要求。此外，在相邻的图像中的连接点（TP）的精度优于0.5像素，因此在拼接几何的无缝水平达到。
For the problem of block adjustment for satellite images, which cannot be solved under conditions of weak geometric convergence, this paper proposes a strategy that uses a planar block adjustment method to solve the orientation parameters of all satellite images, and then each satellite image is orthorectified. This strategy can ensure both the uniformity of the positioning accuracy and the strictness of the relative positions of the adjacent orthoimages. Tests of 139 panchromatic nadir images from the ZY-3 satellite show that by using only a small number of ground control points (GCPs), whose plane accuracy is 5 m, the plane accuracy of independent check points (ICPs) is better than 7 m after planar block adjustment. This accuracy meets the requirements for Chinese 1:50 000 topographic maps. Moreover, the preciseness of tie points (TPs) in adjacent images is better than 0.5 pixels, so a seamless level in mosaic geometry is attained.