期刊
OPTICS EXPRESS
卷 23, 期 25, 页码 32859-32868出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.23.032859
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- Diamond Light Source
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. (C) 2015 Optical Society of America
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