A Low-Cost Photogrammetric System for Structural Deformation Monitoring | ||
| The International Conference on Civil and Architecture Engineering | ||
| Article 55, Volume 8, 8th International Conference on Civil and Architecture Engineering, May 2010, Pages 1-13 PDF (2.69 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/iccae.2010.45111 | ||
| Authors | ||
| Ivan Detchev; Ayman Habib | ||
| Department of Geomatics Engineering, University of Calgary, Canada. | ||
| Abstract | ||
| Abstract: As a remote sensing technique, photogrammetry does not need access to objects being measured. This can be a great advantage when it comes to deformation monitoring. This paper proposes a low-cost photogrammetric system for deformation monitoring of structural materials. The system design is based on a setup consisting of a projector and multiple cameras, and it is using a pattern projection. The software necessary to perform the 3D object reconstruction includes modules dealing with epipolar resampling, feature extraction, matching and tracking, and 3D multiple light ray intersection. The system was tested by first fitting a point cloud reconstruction of a flat particle board to a mathematical plane. Then, the same particle board was artificially deformed, and the normal distances from the new point cloud reconstruction to the original fitted plane were calculated. The experiment proved that it was possible to detect sub-millimetre level deflections. | ||
| Keywords | ||
| Close range photogrammetry; off-the-shelf digital cameras; electronic projectors; pattern projection; 3D object reconstruction | ||
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