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Radial lens distortion correction with sub-pixel accuracy for X-ray micro-tomography

DOI: 10.1364/OE.23.032859 DOI Help
PMID: 26699073 PMID Help

Authors: Nghia T. Vo (Diamond Light Source) , Robert C. Atwood (Diamond Light Source) , Michael Drakopoulos (Diamond Light Source)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Optics Express , VOL 23 (25) , PAGES 32859-32868

State: Published (Approved)
Published: December 2015

Open Access Open Access

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.

Journal Keywords: Camera Calibration; Models; Images

Subject Areas: Technique Development, Physics

Instruments: I12-JEEP: Joint Engineering, Environmental and Processing

Added On: 14/12/2015 11:02

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