- 标题
- 摘要
- 关键词
- 实验方案
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Multi-step approach for automated scaling of photogrammetric micro-measurements
摘要： Photogrammetry can be used for the measurement of small objects with micro-features, with good results, low costs, and the possible addition of texture information to the 3D models. The performance of this technique is strongly affected by the scaling method, since it retrieves a model that must be scaled after its elaboration. In this paper, a fully automated multi-step scaling system is presented, which is based on machine vision algorithms for retrieving blurred areas. This method allows researchers to find the correct scale factor for a photogrammetric micro model and is experimentally compared to the existing manual method basing on the German guideline VDI/VDE 2634, Part 3. The experimental tests are performed on millimeter-sized certified workpieces, finding micrometric errors, when referred to reference measurements. As a consequence, the method is candidate to be used for measurements of micro-features. The proposed tool improves the performance of the manual method by eliminating operator-dependent procedures. The software tool is available online as supplementary material and represents a powerful tool to face scaling issues of micro-photogrammetric activities.
关键词： Depth from focus,Photogrammetry,Micro-features,Measurement,International standards,Image analysis,Scale
更新于2025-09-23 15:23:52
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LEOMA and the US Laser Industry || LEOMA and the U.S. Laser Industry
摘要： The chapter discusses the formation and evolution of the Laser and Electro-Optics Manufacturers' Association (LEOMA), highlighting its challenges and achievements in addressing industry-wide issues such as export controls, international standards, and conference proliferation. It also reflects on the association's eventual decline due to diminishing urgency of its initial projects and the industry downturn in the early 21st century.
关键词： laser industry,international standards,trade association,LEOMA,export controls,conference proliferation
更新于2025-09-16 10:30:52