Radial lens distortion correction with sub-pixel accuracy for X-ray micro-tomography.
Opt Express
; 23(25): 32859-68, 2015 Dec 14.
Article
em En
| MEDLINE
| ID: mdl-26699073
ABSTRACT
Distortion correction or camera calibration for an imaging system which is highly configurable and requires frequent disassembly for maintenance or replacement of parts needs a speedy method for recalibration. Here we present direct techniques for calculating distortion parameters of a non-linear model based on the correct determination of the center of distortion. These techniques are fast, very easy to implement, and accurate at sub-pixel level. The implementation at the X-ray tomography system of the I12 beamline, Diamond Light Source, which strictly requires sub-pixel accuracy, shows excellent performance in the calibration image and in the reconstructed images.
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MEDLINE
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En
Ano de publicação:
2015
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Article