空间后方交会精度分析及实验验证

摘要

The single image space resection is a key step in photogrammetry to calculate 3D coordinates,it has a close and com⁃plicated mathematical formula,and is susceptible by its internal parameters and external environment.At present,there are more studies on resection solving methods but fewer studies on precision evaluation.This paper studies the factors that influence the resection preci⁃sion based on single image space resection theory analysis, and designs resection experiments for various situations. The influence of image point coordinates,object space point coordinates,control field size and photogrammetric distance on resection precision is studied in detail.The influence degree and trends of those influence factors on resection precision are obtained from experiments,which has some guiding significance for improving the precision of single image space resection in practical engineering applications.%单像空间后方交会是摄影测量计算三维坐标的关键步骤，有着严密且复杂的数学公式，其内部参数及外部环境都会成为交会精度的影响因素。针对目前单像空间后方交会求解方法研究较多，而精度评价方面研究较少的现状，通过对单像空间后方交会理论进行分析，寻找影响交会精度的影响因素，设计各种情况的后方交会实验，着重研究了像点坐标、物方点坐标、控制场大小和摄影距离对交会精度的影响。通过实验研究得出这几种影响因素对交会精度的影响大小和影响趋势，对于实际工程应用中提高单像空间后方交会精度具有一定的指导意义。