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http://dx.doi.org/10.22640/lxsiri.2021.51.2.73

Height Determination Using Vanishing Points of a Single Camera for Monitoring of Construction Site  

Choi, In-Ha (Department of Spatial Information Engineering, Namseoul University)
So, Hyeong-Yoon (Department of Spatial Information Engineering, Namseoul University)
Kim, Eui-Myoung (Department of Drone.GIS Engineering, Namseoul University)
Publication Information
Journal of Cadastre & Land InformatiX / v.51, no.2, 2021 , pp. 73-82 More about this Journal
Abstract
According to the government's announcement of the safety management enhancement policy for small and medium-sized private construction sites, the subject of mandatory CCTV installation has been expanded from large construction sites to small and medium-sized construction sites. However, since the existing CCTV at construction sites has been used for simple control for safety management, so research is needed for monitoring of construction sites. Therefore, in this study, three vanishing points were calculated based on a single image taken with a monocular camera, and then a camera matrix containing interior orientation parameters information was determined. And the accuracy was verified by calculating the height of the target object from the height of the reference object. Through height determination experiments using vanishing points based on a monocular camera, it was possible to determine the height of target objects only with a single image without separately surveying of ground control points. As a result of the accuracy evaluation, the root mean square error was ±0.161m. Therefore, it is determined that the progress of construction work at the construction sites can be monitored through the single image taken using the single camera.
Keywords
Single Camera; Vanishing Point; Camera Matrix; Height Determination; Construction Sites Monitoring;
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