一种地物关系约束下的线阵影像坐标反投影计算方法
发布时间：2019-01-18 09:59
【摘要】：坐标反投影计算是线阵影像基于严格模型几何校正的关键步骤。本文在分析线阵摆扫式影像的成像方式及其特点的基础上,针对传统基于像方的顺序或迭代搜索方法效率低下的问题,提出了一种利用地物关系约束的坐标反投影计算方法。首先将当前相邻点的最佳扫描行作为先验值,估算其与当前点最佳扫描行的距离,定位初始最佳扫描行;然后以初始最佳扫描行为中心构建搜索窗口,进行最佳扫描行精确搜索;最后根据最佳扫描行对应的外方位元素进行坐标反投影计算。通过对机载线阵摆扫式模拟影像数据和推扫式真实影像数据的试验,验证了该方法的可行性、准确性和高效性。
[Abstract]:The calculation of coordinate anti-projection is a key step of line array image based on strict model geometric correction. In this paper, on the basis of the imaging mode and characteristics of the analysis line array, a method for calculating the coordinate anti-projection using the object relation constraint is proposed for the problem of low efficiency of the traditional image-based sequence or the iterative search method. firstly, the best scanning line of the current adjacent point is taken as a priori value, the distance between the best scanning line and the current point optimal scanning line is estimated, the initial optimal scanning line is positioned, and the searching window is constructed at the center of the initial optimal scanning behavior, and the optimal scanning line is searched accurately; and finally carrying out coordinate anti-projection calculation according to the outer bearing element corresponding to the optimal scanning line. The feasibility, accuracy and efficiency of the method are verified by the test of the on-board line-array-sweeping analog image data and the push-to-scan real image data.
【作者单位】： 信息工程大学地理空间信息学院;武汉大学测绘遥感信息工程国家重点实验室;解放军95899部队;
【基金】：高分辨率对地观测系统重大专项(GFZX04032201-1-1) 对地观测技术国家测绘地理信息局重点实验室开放基金(K201508)~~
【分类号】：P237
，
本文编号：2410586
[Abstract]:The calculation of coordinate anti-projection is a key step of line array image based on strict model geometric correction. In this paper, on the basis of the imaging mode and characteristics of the analysis line array, a method for calculating the coordinate anti-projection using the object relation constraint is proposed for the problem of low efficiency of the traditional image-based sequence or the iterative search method. firstly, the best scanning line of the current adjacent point is taken as a priori value, the distance between the best scanning line and the current point optimal scanning line is estimated, the initial optimal scanning line is positioned, and the searching window is constructed at the center of the initial optimal scanning behavior, and the optimal scanning line is searched accurately; and finally carrying out coordinate anti-projection calculation according to the outer bearing element corresponding to the optimal scanning line. The feasibility, accuracy and efficiency of the method are verified by the test of the on-board line-array-sweeping analog image data and the push-to-scan real image data.
【作者单位】： 信息工程大学地理空间信息学院;武汉大学测绘遥感信息工程国家重点实验室;解放军95899部队;
【基金】：高分辨率对地观测系统重大专项(GFZX04032201-1-1) 对地观测技术国家测绘地理信息局重点实验室开放基金(K201508)~~
【分类号】：P237
，
本文编号：2410586
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