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Uncertainty model for a traceable stereo-photogrammetry system

Sims-Waterhouse, Danny; Isa, Mohammed; Piano, Samanta; Leach, Richard


Danny Sims-Waterhouse


Through the computational modelling and experimental verification of a stereo-photogrammetry system, the expanded uncertainty on form measurement was estimated and was found to be , and for a 95% confidence interval (coverage factors of = 3.2, 2.0 and 2.0 respectively) in the x, y and z axis respectively. The contribution of systematic offsets in the system properties was also investigated, demonstrating the complex distortions of the measurement volume that result from these systematic errors. Additionally, a traceable method of applying a scale factor to the reconstruction was demonstrated using a laser interferometer and gauge block. The relative standard uncertainty on the size of the measurements was estimated to be 0.007% corresponding to length measurement uncertainties of around over a 100 mm range. Finally, the residuals from a linear fit of the scale factor were found to exhibit behaviour that would be expected to result from small offsets in the system properties. The outcome of this work is a better understanding of the propagation of uncertainty through the stereo-photogrammetry system as well as highlighting key influence factors that must be addressed in future work.


Sims-Waterhouse, D., Isa, M., Piano, S., & Leach, R. (2020). Uncertainty model for a traceable stereo-photogrammetry system. Precision Engineering, 63, 1-9.

Journal Article Type Article
Acceptance Date Dec 16, 2019
Online Publication Date Dec 18, 2019
Publication Date 2020-05
Deposit Date Mar 24, 2021
Journal Precision Engineering
Print ISSN 0141-6359
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 63
Pages 1-9
Keywords General Engineering
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