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Optical Engineering

Calibration of defocus blur for zoom lenses
Author(s): Jaekyoung Moon; Soon-Yong Park
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Paper Abstract

Depth from defocus(DFD) measures defocus blur, which determines the point spread function (PSF) of an image formation system. Most DFD research has been investigated with a fixed focal length, where two or more defocus images are obtained with different image distances or lens apertures. To apply DFD techniques using a zoom lens, extensive calibration of the image formation system is needed. This work presents a simple calibration technique of defocus blur for a zoom lens system. We derive the relationship of defocus blur with respect to different focal lengths of the lens. The proposed technique is applied to a spatial domain DFD technique for error analysis.

Paper Details

Date Published: 1 December 2007
PDF: 7 pages
Opt. Eng. 46(12) 127005 doi: 10.1117/1.2823155
Published in: Optical Engineering Volume 46, Issue 12
Show Author Affiliations
Jaekyoung Moon, Kyungpook National Univ. (South Korea)
Soon-Yong Park, Kyungpook National Univ. (South Korea)

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