Exploring the potentials of UAV photogrammetric point clouds in facade detection and 3D reconstruction of buildings

K. K. Mwangangi*, P. O. Mc'okeyo, S. J. Oude Elberink, F. Nex

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

2 Citations (Scopus)
112 Downloads (Pure)

Abstract

The use of Airborne Laser Scanner (ALS) point clouds has dominated 3D buildings reconstruction research, thus giving photogrammetric point clouds less attention. Point cloud density, occlusion and vegetation cover are some of the concerns that promote the necessity to understand and question the completeness and correctness of UAV photogrammetric point clouds for 3D buildings reconstruction. This research explores the potentials of modelling 3D buildings from nadir and oblique UAV image data vis a vis airborne laser data. Optimal parameter settings for dense matching and reconstruction are analysed for both UAV image-based and lidar point clouds. This research employs an automatic data driven model approach to 3D building reconstruction. A proper segmentation into planar roof faces is crucial, followed by façade detection to capture the real extent of the buildings' roof overhang. An analysis of the quality of point density and point noise, in relation to setting parameter indicates that with a minimum of 50 points/m2, most of the planar surfaces are reconstructed comfortably. But for smaller features than dormers on the roof, a denser point cloud than 80 points/m2 is needed. 3D buildings from UAVs point cloud can be improved by enhancing roof boundary by use of edge information from images. It can also be improved by merging the imagery building outlines, point clouds roof boundary and the walls outline to extract the real extent of the building.

Original languageEnglish
Title of host publicationXXIV ISPRS Congress “Imaging today, foreseeing tomorrow”
Subtitle of host publicationCommission II
EditorsA. Yilmaz, J.D. Wegner, R. Qin, F. Remondino, T. Fuse, I. Toschi
PublisherCopernicus
Pages433-440
Number of pages8
Volume43
EditionB2-2022
DOIs
Publication statusPublished - 30 May 2022
EventXXIV ISPRS Congress 2022: Congress “Imaging today, foreseeing tomorrow” - Nice, France
Duration: 6 Jun 202211 Jun 2022
https://www.int-arch-photogramm-remote-sens-spatial-inf-sci.net/XLIII-B3-2022/index.html

Publication series

NameInternational Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences - ISPRS Archives
PublisherCopernicus
ISSN (Print)1682-1750

Conference

ConferenceXXIV ISPRS Congress 2022
Abbreviated titleISPRS 2022
Country/TerritoryFrance
CityNice
Period6/06/2211/06/22
Internet address

Keywords

  • 3D Reconstruction
  • Facade Detection
  • Orthomosaic
  • Point Clouds
  • Segmentation
  • UAV
  • ITC-GOLD

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