不同光照条件对侵蚀沟三维重建精度的影响

孙欢; 王让虎; 杨久春; 张树文; 岳书平

doi:10.13870/j.cnki.stbcxb.2023.01.007

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不同光照条件对侵蚀沟三维重建精度的影响

更新时间：2025-03-12

- 不同光照条件对侵蚀沟三维重建精度的影响
- Influence of Different Illumination Conditions on 3D Reconstruction Accuracy of Erosion Gully
- 水土保持学报 2023年37卷第1期页码：45-51
- 作者机构：
  
  1. 山西大学黄土高原研究所,太原,030006
  2. 中国科学院东北地理与农业生态研究所,长春,130102
  3. 南京信息工程大学地理科学学院,南京,210044
- 作者简介：
  
  [ "孙欢(1995-),女,硕士研究生,主要从事无人机遥感应用研究。E-mail:huansunmail@163.com" ]
- 基金信息：
  
  国家自然科学基金项目(42171380,41801350,41901355);国家重点研发计划项目(2021YFD1500102-4);山西省应用基础研究计划项目(201901D211119)
- DOI：10.13870/j.cnki.stbcxb.2023.01.007
  中图分类号： S252.9
- 纸质出版：2023
- 稿件说明：
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孙欢, 王让虎, 杨久春, 等. 不同光照条件对侵蚀沟三维重建精度的影响[J]. 水土保持学报, 2023,37(1):45-51.

SUN Huan, WANG Ranghu, YANG Jiuchun, et al. Influence of Different Illumination Conditions on 3D Reconstruction Accuracy of Erosion Gully[J]. 2023, 37(1): 45-51.
孙欢, 王让虎, 杨久春, 等. 不同光照条件对侵蚀沟三维重建精度的影响[J]. 水土保持学报, 2023,37(1):45-51. DOI： 10.13870/j.cnki.stbcxb.2023.01.007.

SUN Huan, WANG Ranghu, YANG Jiuchun, et al. Influence of Different Illumination Conditions on 3D Reconstruction Accuracy of Erosion Gully[J]. 2023, 37(1): 45-51. DOI： 10.13870/j.cnki.stbcxb.2023.01.007.

摘要

为深入探究不同光照条件下无人机重建三维模型精度的差异

在晴天以及阴天条件下

采用无人机摄影技术获得4期数字表面模型

并分别以RTK(real-time kinematic)测量的高程点和三维激光扫描仪获取的数字高程模型为基准

在典型剖面和整个侵蚀沟2个不同尺度上

分析在不同光照条件下侵蚀沟三维重建的高程精度差异。结果表明:(1)典型剖面尺度上

阴天构建的模型高程精度最高

晴天中午的高程模型精度相较于上午和下午的更高

而剖面阴影区高程误差比非阴影区增加0.138~0.217 m。(2)整个侵蚀沟尺度上

阴天条件下航测的高程模型的均方根误差达到最小仅为0.155 m;对于晴天的不同时段

中午航测所得的DSM高程误差最低

但仍比阴天DSM的高程误差高0.411 m;综合晴天的3期高程模型

阴影区高程误差比非阴影区增加0.250~0.346 m。(3)从不同坡向来看

阳坡的高程误差最低

而阴影面积的增加导致其他坡向误差进一步加大。光照产生的阴影显著降低高程模型精度

研究结果可为基于无人机的侵蚀沟航测制图研究提供参考。

Abstract

In order to further explore the differences in accuracy of UAV-derived 3D models under different lighting conditions

four phases of digital surface models were constructed by UAV photography technology under sunny and cloudy conditions

and elevation points measured by RTK (real-time kinematic) and digital elevation model obtained by 3D laser scanner were taken as benchmark

respectively. At the typical section and the entire erosion gully scale

the difference in elevation accuracy of 3D reconstruction of erosion gully under different lighting conditions was analyzed. The results showed that: (1) At the typical section scale

the elevation accuracy of the model constructed on cloudy days was the highest

and the elevation accuracy of the model constructed at noon on sunny days was higher than that in the morning and afternoon

while the elevation error of the shaded area was 0.138~0.217 m higher than that in the non-shaded area. (2) At the entire erosion gully scale

the root mean square error of the aerial survey elevation model on cloudy days was only 0.155 m

which was the minimum. For different periods of sunny days

the elevation error of DSM obtained by UAV survey at noon was the lowest

but it was still 0.411 m higher than that of DSM on cloudy days. Based on the three elevation models of sunny days

the elevation error in the shaded area was 0.250~0.346 m higher than that in the non-shaded area. (3) From different slope aspects

the elevation error of sunny slope was the lowest

while the increasing of shadow area led to the further increase of other slope aspects errors. The results showed that the shadow caused by illumination significantly reduced the accuracy of the elevation model

which could provide a reference for the research of aerial mapping of erosion gully based on UAV.

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