Details
| Translated title of the contribution | Calibration of focus-adjustable cameras for triangulation sensors by model-based camera parameter estimation Polynomial estimation of the calibration parameters over the focal range of an objective lens |
|---|---|
| Original language | German |
| Pages (from-to) | 455-462 |
| Number of pages | 8 |
| Journal | Technisches Messen |
| Volume | 89 |
| Issue number | 6 |
| Early online date | 21 Apr 2022 |
| Publication status | Published - 30 Jun 2022 |
Abstract
The working range of triangulation-based measuring systems is often limited by the depth of field of the applied optical system. Approaches such as increasing the depth of field range by reducing the aperture are limited in their effectiveness by a lower light yield and thus require a longer exposure time. Focus adjustable optics enable the depth of field to be modified and thus effect the location and shape of the working range. However, the validity of the model-based camera calibration is limited to the corresponding focus setting, especially with optics that exhibit the effect of focus breathing, i. e. whose focal length change with the focus setting. This paper presents an approach to model the calibration parameters over the entire focus range of a lens using function fitting of the camera parameters and the influence of different configurations on this process is examined.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Instrumentation
- Engineering(all)
- Electrical and Electronic Engineering
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In: Technisches Messen, Vol. 89, No. 6, 30.06.2022, p. 455-462.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Calibration of focus-adjustable cameras for triangulation sensors by model-based camera parameter estimation
AU - Bossemeyer, Hagen
AU - Ahlborn, Patrick
AU - Kästner, Markus
AU - Reithmeier, Eduard
PY - 2022/6/30
Y1 - 2022/6/30
N2 - The working range of triangulation-based measuring systems is often limited by the depth of field of the applied optical system. Approaches such as increasing the depth of field range by reducing the aperture are limited in their effectiveness by a lower light yield and thus require a longer exposure time. Focus adjustable optics enable the depth of field to be modified and thus effect the location and shape of the working range. However, the validity of the model-based camera calibration is limited to the corresponding focus setting, especially with optics that exhibit the effect of focus breathing, i. e. whose focal length change with the focus setting. This paper presents an approach to model the calibration parameters over the entire focus range of a lens using function fitting of the camera parameters and the influence of different configurations on this process is examined.
AB - The working range of triangulation-based measuring systems is often limited by the depth of field of the applied optical system. Approaches such as increasing the depth of field range by reducing the aperture are limited in their effectiveness by a lower light yield and thus require a longer exposure time. Focus adjustable optics enable the depth of field to be modified and thus effect the location and shape of the working range. However, the validity of the model-based camera calibration is limited to the corresponding focus setting, especially with optics that exhibit the effect of focus breathing, i. e. whose focal length change with the focus setting. This paper presents an approach to model the calibration parameters over the entire focus range of a lens using function fitting of the camera parameters and the influence of different configurations on this process is examined.
UR - http://www.scopus.com/inward/record.url?scp=85129328394&partnerID=8YFLogxK
U2 - 10.1515/teme-2022-0023
DO - 10.1515/teme-2022-0023
M3 - Artikel
AN - SCOPUS:85129328394
VL - 89
SP - 455
EP - 462
JO - Technisches Messen
JF - Technisches Messen
SN - 0171-8096
IS - 6
ER -