Camera Calibration using the Damped Bundle Adjustment Toolbox
| Autor: | Pierre Grussenmeyer, Niclas Börlin |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
lcsh:Applied optics. Photonics
Beräkningsmatematik Computer science Calibration (statistics) Bundle adjustment initial values close range photogrammetry lcsh:Technology Camera calibration Datorseende och robotik (autonoma system) Camera auto-calibration Focal length Computer vision Image sensor Computer Vision and Robotics (Autonomous Systems) lcsh:T business.industry Astrophysics::Instrumentation and Methods for Astrophysics focal length lcsh:TA1501-1820 Toolbox convergent Computational Mathematics Photogrammetry lcsh:TA1-2040 bundle adjustment Artificial intelligence lcsh:Engineering (General). Civil engineering (General) business Camera resectioning |
| Zdroj: | ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Vol II-5, Pp 89-96 (2014) |
| ISSN: | 2194-9050 |
| DOI: | 10.5194/isprsannals-ii-5-89-2014 |
| Popis: | Camera calibration is one of the fundamental photogrammetric tasks. The standard procedure is to apply an iterative adjustment to measurements of known control points. The iterative adjustment needs initial values of internal and external parameters. In this paper we investigate a procedure where only one parameter – the focal length is given a specific initial value. The procedure is validated using the freely available Damped Bundle Adjustment Toolbox on five calibration data sets using varying narrow- and wide-angle lenses. The results show that the Gauss-Newton-Armijo and Levenberg-Marquardt-Powell bundle adjustment methods implemented in the toolbox converge even if the initial values of the focal length are between 1/2 and 32 times the true focal length, even if the parameters are highly correlated. Standard statistical analysis methods in the toolbox enable manual selection of the lens distortion parameters to estimate, something not available in other camera calibration toolboxes. A standardised camera calibration procedure that does not require any information about the camera sensor or focal length is suggested based on the convergence results. The toolbox source and data sets used in this paper are available from the authors. |
| Databáze: | OpenAIRE |
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