像控后处理倾斜摄影三维建模方法研究
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1.南京信息工程大学 遥感与测绘工程学院;2.南京信息工程大学 遥感与测绘工程学院,滁州学院 地理信息与旅游学院;3.南京信息工程大学 地理科学学院;4.实景地理环境安徽省重点实验室

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乡村数字孪生全息实景地理环境关键技术与示范应用研究(KJ2021ZD0130),安徽高校自然科学研究重大项目;实景地理环境智能科技产业创新,滁州市“113”产业创新团队。


Study on Three-dimensional Modeling Method of Oblique Photography with Post-Processed Photograph Control
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1.School of Remote Sensing and Surveying Engineering,Nanjing University of Information Science and Technology;2.School of Remote Sensing and Surveying Engineering, Nanjing University of Information Science and Technology;3.College of Geographic Information and Tourism, Chuzhou University;4.School of Geographic Sciences,Nanjing University of Information Science and Technology;5.Anhui Key Laboratory of real geographical environment

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    摘要:

    无人机倾斜摄影三维模型的精度是衡量模型质量好坏的重要指标。常规的倾斜摄影三维建模需要先布设像控点,作业效率低且维护成本高。无像控建模不需要布设像控点,航测效率高,但精度较低。本文以南京信息工程大学东苑为实验区,研究了一种像控后处理倾斜摄影三维建模方法。结果表明:1)基于像控后处理建立的三维模型与常规方法建立的三维模型精度基本相同,平面中误差、高程中误差均小于0.05m,满足高效率、高精度、低成本的建模要求;2)像控后处理建模避免了制作和维护像控点的过程,同时基于已有高精度三维模型选择像控点并提取坐标,提升了像控点选择的科学性和降低了外业测点的工作量;3)该方法在城市、城镇、道路丰富等地区高精度三维实景模型定期更新上具有很好的普适性。

    Abstract:

    Abstract: The accuracy is an important indicator of the quality of UAV oblique photography three-dimensional(3D) model. Conventional modeling steps need to deploy ground control points (GCPs), which is inefficient and costly. Control-free modeling does not require GCPs, which is efficiency but low accuracy. Thus, this paper proposed a 3D modeling method of oblique photography with post-processed image control. The study area is in the east area of Nanjing University of Information Science and Technology. The results show that: 1) The accuracy of the 3D models established by the two methods is basically the same, and the plane error and the elevation error are both less than 0.05m, which meets the modeling requirements of high efficiency, high precision and low cost; 2) the photograph control post-processed modeling avoids the process of making and maintaining the photograph control point. photograph control points are selected on the existing high-precision 3D model and the coordinates are extracted, which improves the scientificity of the photograph control point selection and reduces the workload of setting GCPs; 3) This method has good universality in the regular updating of high-precision 3D real scene models in cities, towns, roads and other areas. Keywords: oblique photography; photograph control point; 3D reality model; photograph control post-processed; precision

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  • 收稿日期:2022-03-15
  • 最后修改日期:2022-11-16
  • 录用日期:2022-11-21
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