Occlusion-free Orthophoto Generation for Building Roofs Using UAV Photogrammetric Reconstruction and Digital Twin Data

Jiajun Li, Frédéric Bosché, Chris Xiaoxuan Lu, Lyn Wilson

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract / Description of output

Building roofs are a primary barrier of the building fabric to protect building interiors and their occupants from the effects of the weather. Effectively monitoring their condition and maintaining them is thus critical, and even more so in light of the increasing risks induced by climate change. Ideally, this requires frequent and careful surveying, as well as recording of the results in a way that facilitates monitoring over time. Traditional manual data collection and defect detection and recording methodologies have been used mainly on building facades. Orthophotos are commonly used for recording. However, (1) current approaches to generate orthophotos cannot ensure the photos are occlusion-free; and (2) the results cannot be efficiently recorded in a structured, digital way with semantic relationship to the corresponding elements in the building Digital Twin (DT). In this paper, a method is proposed to automatically generate high-resolution orthophotos of roof panels from UAV data, given an existing building DT. The resulting orthophotos have high-resolution (e.g. 5mm per pixel). They are occlusion-free and linked semantically to the building elements in the DT. The method is demonstrated using a real case study of a complex pitched slated roof of a traditional building.
Original languageEnglish
Title of host publication2023 Proceedings of the 40th ISARC, Chennai, India
PublisherInternational Association for Automation and Robotics in Construction (IAARC)
Pages371-378
ISBN (Electronic)978-0-6458322-0-4
DOIs
Publication statusPublished - 4 Jul 2023
Event40th International Symposium on Automation and Robotics in Construction - IIT Madras, Chennai, India
Duration: 3 Jul 20239 Jul 2023
Conference number: 40
https://isarc2023.com/r3/

Publication series

NameISARC Proceedings
PublisherThe International Association for Automation and Robotics in Construction
Volume2023
ISSN (Electronic)2413-5844

Conference

Conference40th International Symposium on Automation and Robotics in Construction
Abbreviated titleISARC
Country/TerritoryIndia
CityChennai
Period3/07/239/07/23
Internet address

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