Design of a 3D photogrammetry acquisition system and data processing workflow automation
Rosell Tarragó, Miquel
Universitat de Lleida. Escola Politècnica Superior
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The objective of this final degree project was to develop a mechanical-optic system for acquiring photographic images, alongside a posterior automatic processing step based on photogrammetric techniques to generate three-dimensional models. The methodology had to be optimized for industrial and agricultural applications. To achieve this objective, an investigation of the state-of-the-art of the photogrammetry field was done in order to find, discuss and optimize the available methods. Further investigation lead to the specification of the project variables regarding the mechanical-optic system. Due to the consequences of Covid-19, the planned experimental field tests were substituted by simulations using 3-D software. The change turned out to be a good addition to the project, since it allowed a controlled variable study and discussion. At the end of the project, an optimal camera array configuration was found in order to obtain an accurate and fast scanning rig. The camera array has all the cameras in a vertical concave array around the scanning subject. It was also found that filtering the dense point clouds increased the computing time by several hours, but the error in the results was not reduced significantly, and some information was lost in the process. A specific node tree workflow for the used software was also found. This configuration allowed the users to have a fully automated processing step, while still letting room for customization based on the requirements of the project.
European research projects
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