TY - JOUR N2 - In this work, authors investigated the effect of the Depth of Field (DoF) reduction, arising when the acquisition of small objects is carried out with a photogrammetry-based system using a Digital Single Lens Reflex (DSLR) camera and the structure from motion (SfM) algorithm. This kind of measuring instrument is very promising for industrial metrology according to the paradigms of the fourth industrial revolution. However, when increasing the magnification level, necessary for the reconstruction of sub-millimetric features, there is a corresponding decrease of the DoF, leading to possible effects on the reconstruction accuracy. Thus, the effect of the DoF reduction was analysed through the reconstruction of a well-known artefact: the step gauge. The analysis was conducted considering the theory behind the DoF concept, the analysis of the 2D images, input of photogrammetric reconstruction and, finally, the results in terms of dimensional verification of the reconstructed step gauge. L1 - http://www.czasopisma.pan.pl/Content/120100/art06.pdf L2 - http://www.czasopisma.pan.pl/Content/120100 PY - 2021 IS - No 2 EP - 323–342 DO - 10.24425/mms.2021.136610 KW - metrology of small parts KW - uncertainty KW - photogrammetry KW - depth of field KW - miniature step gauge KW - flatness KW - dimensional accuracy A1 - Guerra, Maria Grazia A1 - Galantucci, Luigi Maria A1 - Lavecchia, Fulvio A1 - De Chiffre, Leonardo PB - Polish Academy of Sciences Committee on Metrology and Scientific Instrumentation VL - vol. 28 DA - 2021.07.01 T1 - Reconstruction of small components using photogrammetry: a quantitative analysis of the depth of field influence using a miniature step gauge SP - 323–342 UR - http://www.czasopisma.pan.pl/dlibra/publication/edition/120100 T2 - Metrology and Measurement Systems ER -