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Title |
Real-Time Rebar Spacing Measurement in Construction Sites Using a Depth Camera Technique
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Authors |
우욱용(Ukyong Woo) ; 이명훈(Myung-Hun Lee) ; 최하진(Hajin Choi) |
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DOI |
https://doi.org/10.4334/JKCI.2025.37.5.589 |
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Keywords |
원격구조감리; 심도 카메라; 3D 포인트 클라우드; 철근 배근 간격 remote construction supervision; depth camera; 3D point cloud; rebar spacing |
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Abstract |
The issue of 3D point cloud loss in rebar spacing measurement when using depth cameras on construction sites was investigated. By analyzing the structural characteristics of depth cameras, this study identifies key causes of data loss, such as repeated rebar patterns and lighting conditions, and proposes two measurement techniques: intersection-based measurement and camera tilt adjustment. Field experiments were conducted on slab and column rebar placements to verify the accuracy and applicability of the proposed methods. The results showed that both methods enabled complete measurement coverage, with a maximum error rate of 7%, which falls within the 10% tolerance typically permitted in construction inspections. These findings demonstrate that the proposed measurement methods can effectively overcome the limitations of conventional depth camera?based systems, enabling accurate and real-time monitoring of rebar placement. Ultimately, this contributes to advancing digital and remote-based construction supervision by offering a practical and reliable alternative to traditional on-site inspections.
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