多因素无人机倾斜摄影三维建模精度研究

Study on 3D Modeling Accuracy of UAV Tilt Photography with Different Influencing Factors

无人机倾斜摄影实景三维技术为智慧城市的快速推进提供了支撑,三维模型精度对应用效果和建模过程均有重要影响,本文从控制点数量、控制点分布以及航线布设三个方面开展精度验证工作,以北京怀柔某区为研究区,设置3组对比实验,选取14个检查点对各组实验进行精度评定。结果表明,满足产品规范精度要求且最经济的方案为单向航线、5个控制点且保证四角分布的方案;控制点分布相较于控制点数量对模型精度的影响更大;增加交叉航线可一定程度提升平面精度。研究结果可较为系统地为实际应用工作提出指导和建议。

Tilt photogrammetry technology of UAV provides support for the rapid promotion of smart city.The accuracy of 3D model has an important influence on the application effect and modeling process.This paper verifics the accuracy from three influencing factors:the control point quantity,the distribution and routing plan.To this end,a district in Huairou,Beijing is taken as the research area.Three groups of comparative experiments were set up,and 16 test points were selected to evaluate the accuracy of each experiment.The results show that the scheme with the simplest implementation conditions and meeting the precision requirements of product specifications is the scheme with“one-way route”,5 control points and“four-angle”distribution.The distribution of control points has a greater effect on model accuracy than the number of control points.The horizontal precision can be improved by increasing the“cross route”.The research results can provide guidance and suggestions for practical application work systematically.