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

	Calibrating effective focal length for central catadioptric cameras using one space line
	Duan, Fuqing 1; Wu, Fuchao2 ; Zhou, Mingquan 1; Deng, Xiaoming 2,3; Tian, Yun 1
发表期刊	PATTERN RECOGNITION LETTERS
	2012-04-01
卷号	33 期号:5 页码:646-653
文章类型	Article
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. (C) 2011 Elsevier B.V. All rights reserved.
关键词	Camera Calibration Central Catadioptric Camera Focal Length Estimation
WOS标题词	Science & Technology ; Technology
关键词[WOS]	GEOMETRIC-PROPERTIES ; IMAGES
收录类别	SCI
语种	英语
WOS研究方向	Computer Science
WOS类目	Computer Science, Artificial Intelligence
WOS记录号	WOS:000301212400019
引用统计	被引频次：12[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ia.ac.cn/handle/173211/2995
专题	多模态人工智能系统全国重点实验室_机器人视觉
作者单位	1.Beijing Normal Univ, Coll Informat Sci & Technol, Beijing 100875, Peoples R China 2.Chinese Acad Sci, Inst Automat, Natl Lab Pattern Recognit, Beijing 100080, Peoples R China 3.Chinese Acad Sci, Inst Software, Lab Human Comp Interact & Intelligent Informat Pr, Beijing 100190, Peoples R China
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,2012,33(5):646-653.
APA	Duan, Fuqing,Wu, Fuchao,Zhou, Mingquan,Deng, Xiaoming,&Tian, Yun.(2012).Calibrating effective focal length for central catadioptric cameras using one space line.PATTERN RECOGNITION LETTERS,33(5),646-653.
MLA	Duan, Fuqing,et al."Calibrating effective focal length for central catadioptric cameras using one space line".PATTERN RECOGNITION LETTERS 33.5(2012):646-653.