Euclidean upgrading from segment lengths: DLT-like algorithm and its variants

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	Euclidean upgrading from segment lengths: DLT-like algorithm and its variants
	Shi, Kunfeng; Dong, Qiulei; Wu, Fuchao
刊名	IMAGE AND VISION COMPUTING
	2014-02-01
卷号	32 期号:2 页码:155-168
关键词	DLT-like algorithm Euclidean upgrading Multi-camera calibration Segment lengths Weighted DLT-like algorithm
英文摘要	In this paper, how to calibrate a fixed multi-camera system and simultaneously achieve a Euclidean reconstruction from a set of segments is addressed. It is well known that only a projective reconstruction could be achieved without any prior information. Here, the known segment lengths are exploited to upgrade the projective reconstruction to a Euclidean reconstruction and simultaneously calibrate the intrinsic and extrinsic camera parameters. At first, a DLT(Direct Linear Transformation)-like algorithm for the Euclidean upgrading from segment lengths is derived in a very simple way. Although the intermediate results in the DLT-like algorithm are essentially equivalent to the quadric of segments (QoS), the DLT-like algorithm is of higher accuracy than the existing linear algorithms derived from the QoS because of a more accurate way to extract the plane at infinity from the intermediate results. Then, to further improve the accuracy of Euclidean upgrading, two weighted DLT-like algorithms are presented by weighting the linear constraint equations in the original DLT-like algorithm. Finally, using the results of these linear algorithms as the initial values, a new weighted nonlinear algorithm for Euclidean upgrading is explored to recover the Euclidean structure more accurately. Extensive experimental results on both the synthetic data and the real image data demonstrate the effectiveness of our proposed algorithms in Euclidean upgrading and multi-camera calibration. (C) 2014 Elsevier B.V. All rights reserved.
WOS标题词	Science & Technology ; Technology ; Physical Sciences
类目[WOS]	Computer Science, Artificial Intelligence ; Computer Science, Software Engineering ; Computer Science, Theory & Methods ; Engineering, Electrical & Electronic ; Optics
研究领域[WOS]	Computer Science ; Engineering ; Optics
关键词[WOS]	CAMERA CALIBRATION ; SELF-CALIBRATION ; AUTOCALIBRATION ; OBJECTS
收录类别	SCI
语种	英语
WOS记录号	WOS:000332905300005
内容类型	期刊论文
源URL	[http://ir.ia.ac.cn/handle/173211/2983]
专题	自动化研究所_模式识别国家重点实验室_机器人视觉团队
作者单位	Chinese Acad Sci, Inst Automat, Natl Lab Pattern Recognit, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Shi, Kunfeng,Dong, Qiulei,Wu, Fuchao. Euclidean upgrading from segment lengths: DLT-like algorithm and its variants[J]. IMAGE AND VISION COMPUTING,2014,32(2):155-168.
APA	Shi, Kunfeng,Dong, Qiulei,&Wu, Fuchao.(2014).Euclidean upgrading from segment lengths: DLT-like algorithm and its variants.IMAGE AND VISION COMPUTING,32(2),155-168.
MLA	Shi, Kunfeng,et al."Euclidean upgrading from segment lengths: DLT-like algorithm and its variants".IMAGE AND VISION COMPUTING 32.2(2014):155-168.