Calibration of defocus blur for zoom lenses

Jaekyoung Moon; Soon-Yong Park

doi:10.1117/1.2823155

1 December 2007 Calibration of defocus blur for zoom lenses

Jaekyoung Moon, Soon-Yong Park

Author Affiliations +

Optical Engineering, Vol. 46, Issue 12, 127005 (December 2007). https://doi.org/10.1117/1.2823155

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.

©(2007) Society of Photo-Optical Instrumentation Engineers (SPIE)

Citation Download Citation

Jaekyoung Moon and Soon-Yong Park "Calibration of defocus blur for zoom lenses," Optical Engineering 46(12), 127005 (1 December 2007). https://doi.org/10.1117/1.2823155

Published: 1 December 2007

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