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Optical Engineering

Calibration of zoom lens with virtual optical pattern
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Paper Abstract

The accuracy of calibration patterns, their fabrication, and their setup are some of the important challenges in a zoom-lens camera calibration process. We address these problems by using a cross-diffractive optical element, which generates a virtual, dense, and robust calibration grid. We show that a 33×33 calibration grid provides enough control points to fill the entire field of view for 10 to 20× zoom lenses. We show that the calibration of a zoom camera at infinity can be done using this method. A polynomial function has been used to model the variation of the intrinsic calibration parameters over the zoom range. The obtained calibration model has also been validated using a well-known target pattern.

Paper Details

Date Published: 21 May 2015
PDF: 7 pages
Opt. Eng. 54(5) 054107 doi: 10.1117/1.OE.54.5.054107
Published in: Optical Engineering Volume 54, Issue 5
Show Author Affiliations
Aymen Arfaoui, Univ. Laval (Canada)
Simon Thibault, Univ. Laval (Canada)
Pierre Desaulniers, Univ. Laval (Canada)

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