The Practical Effect of a Diffraction‐Limited Image for Photogrammetry

Thomson, G. H.

doi:10.1111/j.1477-9730.2010.00580.x

Cited by 1 publication

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References 6 publications

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“…Regarding the circle of confusion, there are many issues related to the computation of this parameter. Due to its great influence in the computation of DoF value, in this work it was considered as the Airy disk (AD) value [25]. As reported in [26], when considering a specific camera/lens configuration, the diffraction limit has to be considered, and, as a consequence, value c should not be smaller than the size of the AD.…”

Section: Depth Of Field Model Equationmentioning

confidence: 99%

Metrology and Measurement Systems

Guerra

Galantucci

Lavecchia

et al. 2021

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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.

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Section: Depth Of Field Model Equationmentioning

confidence: 99%