Assessment Methods of Bricklaying Competitions Assisted by Close-range Photogrammetry
| Autor: | Jia-Hao Tang, 湯佳豪 |
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| Rok vydání: | 2019 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 107 Skills competition is an annual event for vocational education, and bricklaying is one of the long-established competitions. The assessment methods of the bricklaying competition mainly adopts the manual measurement method, which is time consuming and laborious, and the brick walls are not easy to save. Close-range photogrammetry is a well-developed technology that can generate 3D point cloud models and accurately reconstruct 3D surface through dense image matching. This study applies the close-range photogrammetry to assist in the scoring of brickwork competitions. By establishing a reliable model coordinate system with control points, and a adequate mission planning,the non-metric camera is used to obtain numerous overlapping images of the brickwork. Then the 3D modeling software (ContextCapture) is used to produce the high-density point cloud. Finally the point cloud measurement procedure developed by this study is applied to perform the measurement of the dimension, plumb, level and alignment of the brick walls in the point cloud in a semi-automatic manner. Through the experimental evaluation and testing of the feasibility of the proposed method, it is shown that semi-automated point cloud measurement can indeed reduce manual measurement and reduce the impact of human factors. In addition, the point cloud can completely preserve the brick wall and is convenient for digital platform display, and can also be used as a basis for re-assessment when the competitors raises the objection. This study uses close-range photogrammetry to provide a low-cost but high-quality measurement operations for bricklaying competition with improved efficiency in existing method. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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