Calibration of defocus blur for zoom lenses

被引：2

作者：

Moon, Jaekyoung ^{[1
]}

Park, Soon-Yong ^{[2
]}

机构：

[1] Kyungpook Natl Univ, Sch Elect Engn & Comp Sci, Taegu 702701, South Korea

[2] Kyungpook Natl Univ, Dept Comp Engn, Taegu 702701, South Korea

来源：

OPTICAL ENGINEERING | 2007年 / 46卷 / 12期

关键词：

depth from defocus; defocus blur; zoom lens calibration;

D O I：

10.1117/1.2823155

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

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. (C) 2007 Society of Photo-Optical Instrumentation Engineers.

引用

页数：7