Radial distortion invariants and lens evaluation under a single-optical-axis omnidirectional camera

	Radial distortion invariants and lens evaluation under a single-optical-axis omnidirectional camera
	Wu, Yihong1 ; Hu, Zhanyi1 ; Li, Youfu 2
发表期刊	COMPUTER VISION AND IMAGE UNDERSTANDING
	2014-09-01
卷号	126 页码:11-27
文章类型	Article
摘要	This paper presents radial distortion invariants and their application to lens evaluation under a single-optical-axis omnidirectional camera. Little work on geometric invariants of distorted images has been reported previously. We establish accurate geometric invariants from 2-dimensional/3-dimensional space points and their radially distorted image points. Based on the established invariants in a single image, we construct criterion functions and then design a feature vector for evaluating the camera lens, where the infinity norm of the feature vector is computed to indicate the tangent distortion amount. The evaluation is simple and convenient thanks to the feature vector that is analytical and straightforward on image points and space points without any other computations. In addition, the evaluation is flexible since the used invariants make any a coordinate system of measuring space or image points workable. Moreover, the constructed feature vector is free of point orders and resistant to noise. The established invariants in the paper have other potential applications such as camera calibration, image rectification, structure reconstruction, image matching, and object recognition. Extensive experiments, including on structure reconstruction, demonstrate the usefulness, higher accuracy, and higher stability of the present work. (C) 2014 Elsevier Inc. All rights reserved.
关键词	Geometric Invariant Omnidirectional Camera Tangent Distortion Evaluation
WOS标题词	Science & Technology ; Technology
关键词[WOS]	WIDE-ANGLE ; CALIBRATION ; GEOMETRY
收录类别	SCI
语种	英语
WOS研究方向	Computer Science ; Engineering
WOS类目	Computer Science, Artificial Intelligence ; Engineering, Electrical & Electronic
WOS记录号	WOS:000339646800002
引用统计	被引频次：10[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/173211/2973
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.Chinese Acad Sci, Inst Automat, Natl Lab Pattern Recognit, Beijing 100190, Peoples R China 2.City Univ Hong Kong, Dept Mech & Biomed Engn, Kowloon, Hong Kong, Peoples R China
第一作者单位	模式识别国家重点实验室
推荐引用方式 GB/T 7714	Wu, Yihong,Hu, Zhanyi,Li, Youfu. Radial distortion invariants and lens evaluation under a single-optical-axis omnidirectional camera[J]. COMPUTER VISION AND IMAGE UNDERSTANDING,2014,126:11-27.
APA	Wu, Yihong,Hu, Zhanyi,&Li, Youfu.(2014).Radial distortion invariants and lens evaluation under a single-optical-axis omnidirectional camera.COMPUTER VISION AND IMAGE UNDERSTANDING,126,11-27.
MLA	Wu, Yihong,et al."Radial distortion invariants and lens evaluation under a single-optical-axis omnidirectional camera".COMPUTER VISION AND IMAGE UNDERSTANDING 126(2014):11-27.