We describe a method to compute the internal parameters (focal and principal points) of a camera with known position and orientation, based on the observation of two or more conics on a known plane. The conics can even be degenerate (e.g. pairs of lines). The proposed method can be used to re-estimate the internal parameters of a fully calibrated camera after zooming to a new, unknown, focal length. It also allows estimating the internal parameters when a second, fully calibrated camera observes the same conics. The parameters estimated through the proposed method are coherent with the output of more traditional procedures that require a higher number of calibration images. A deep analysis of the geometrical configurations that influence the proposed method is also reported.
Camera re-calibration after zooming based on sets of conics / I. Frosio, C. Turrini, A. Alzati. - In: THE VISUAL COMPUTER. - ISSN 0178-2789. - 32:5(2016), pp. 663-674. [10.1007/s00371-015-1089-8]
Camera re-calibration after zooming based on sets of conics
I. FrosioPrimo
;C. TurriniSecondo
;A. Alzati
2016
Abstract
We describe a method to compute the internal parameters (focal and principal points) of a camera with known position and orientation, based on the observation of two or more conics on a known plane. The conics can even be degenerate (e.g. pairs of lines). The proposed method can be used to re-estimate the internal parameters of a fully calibrated camera after zooming to a new, unknown, focal length. It also allows estimating the internal parameters when a second, fully calibrated camera observes the same conics. The parameters estimated through the proposed method are coherent with the output of more traditional procedures that require a higher number of calibration images. A deep analysis of the geometrical configurations that influence the proposed method is also reported.File | Dimensione | Formato | |
---|---|---|---|
Accepted version Camera calibration.pdf
accesso aperto
Tipologia:
Post-print, accepted manuscript ecc. (versione accettata dall'editore)
Dimensione
934.88 kB
Formato
Adobe PDF
|
934.88 kB | Adobe PDF | Visualizza/Apri |
art%3A10.1007%2Fs00371-015-1089-8.pdf
accesso riservato
Tipologia:
Publisher's version/PDF
Dimensione
2.03 MB
Formato
Adobe PDF
|
2.03 MB | Adobe PDF | Visualizza/Apri Richiedi una copia |
Pubblicazioni consigliate
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.