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The concept and implementation of smooth generic camera calibration

: Pak, A.


Creath, K. ; Society of Photo-Optical Instrumentation Engineers -SPIE-, Bellingham/Wash.:
Interferometry XVIII : 30 August-1 September 2016, San Diego, California, United States
Bellingham, WA: SPIE, 2016 (Proceedings of SPIE 9960)
ISBN: 978-1-5106-0311-0
ISBN: 978-1-5106-0312-7
Paper 99600I, 10 pp.
Interferometry Conference <18, 2016, San Diego/Calif.>
Conference Paper
Fraunhofer IOSB ()
camera models; generic camera calibration; phase-shifted patterns; non-linear optimization; phase uncertainty; intrinsic camera parameters; finite element method; regularization of model symmetries

The optical shape measurement methods relying on digital cameras require that the imaging geometry is known to high accuracy. One needs a camera model and a corresponding calibration procedure that establishes its parameters based on some dedicated dataset. We elaborate the recently suggested concept of the smooth generic camera calibration, emphasizing its utility for the metrological applications. First, we briefly outline the model and its advantages with respect to the state-of-the-art, then elaborate the ideas of consistently propagating the data uncertainties in the calibration process and utilizing the inherent smoothness in the imaging geometry, and finally present the experimental results of calibrating several non-trivial camera setups.