calibrating effective focal length for central catadioptric cameras using one space line

ISCAS OpenIR

	calibrating effective focal length for central catadioptric cameras using one space line
	Duan Fuqing; Wu Fuchao; Zhou Mingquan; Deng Xiaoming; Tian Yun
	2011
发表期刊	Pattern Recognition Letters
ISSN	1678655
页码	-
摘要	In camera calibration, focal length is the most important parameter to be estimated, while other parameters can be obtained by prior information about scene or system configuration. In this paper, we present a polynomial constraint on the effective focal length with the condition that all the other parameters are known. The polynomial degree is 4 for paracatadioptric cameras and 16 for other catadioptric cameras. However, if the skew is 0 or the ratio between the skew and effective focal length is known, the constraint becomes a linear one or a polynomial one with degree 4 on the effective focal length square for paracatadioptric cameras and other catadioptric cameras, respectively. Based on this constraint, we propose a simple method for estimation of the effective focal length of central catadioptric cameras. Unlike many approaches using lines in literature, the proposed method needs no conic fitting of line images, which is error-prone and highly affects the calibration accuracy. It is easy to implement, and only a single view of one space line is enough with no other space information needed. Experiments on simulated and real data show this method is robust and effective. © 2011 Elsevier B.V. All rights reserved.
收录类别	ei
关键词	Calibration Focusing Polynomials
部门归属	(1) College of Information Science and Technology, Beijing Normal University, Beijing 100875, PR China; (2) National Laboratory of Pattern Recognition, Institute of Automation, Chinese Academy of Sciences, Beijing 100080, PR China; (3) Laboratory of Human-Computer Interaction and Intelligent Information Processing, Institute of Software, Chinese Academy of Sciences, Beijing 100190, PR China
语种	英语
WOS记录号	WOS:000301212400019
引用统计
内容类型	期刊论文
URI标识	http://ir.iscas.ac.cn/handle/311060/14057
专题	中国科学院软件研究所
推荐引用方式 GB/T 7714	Duan Fuqing,Wu Fuchao,Zhou Mingquan,et al. calibrating effective focal length for central catadioptric cameras using one space line[J]. Pattern Recognition Letters,2011:-.
APA	Duan Fuqing,Wu Fuchao,Zhou Mingquan,Deng Xiaoming,&Tian Yun.(2011).calibrating effective focal length for central catadioptric cameras using one space line.Pattern Recognition Letters,-.
MLA	Duan Fuqing,et al."calibrating effective focal length for central catadioptric cameras using one space line".Pattern Recognition Letters (2011):-.

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