Text Box: Monitoring Deformation of Small Structural Models Using Close-Range Photogrammetry
Text Box: Overview
Close-range photogrammetry technique has grown a long way until this present day and has further growth potentials in the coming years. This Thesis Report describes an in-depth investigation into the existing literature on various topics relating to close-range photogrammetry as well as how to achieve precise deformation monitoring results. 
Deformation monitoring experiment was designed to provide precise 3D measurements on the civil structural projects, as well as compare and analyse the accuracy of close-range photogrammetry with linear-variable-differential transformers results (LVDT). For this particle deformation monitoring project, the close-range photogrammetry is able to achieve an accuracy of 0.02mm or 1:20,000. The results show that both techniques are very precise in term of monitoring deformation. According to deformation experiment, the main advantages of digital close-range photogrammetry are that it is able to have more monitoring points than LVDT method and digital close-range photogrammetry can provide 3D displacement on any given points with per-marked targets.  
Furthermore, the validation experiment was carried out to investigate the accuracy of close-range photogrammetry for this project by comparing close-range photogrammetry results with ”°physical”± readings from calliper. The results show that close-range photogrammetry is able to achieve ”Ą0.03mm differences against ”°physical”± measurements.