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Euclidean upgrading from segment lengths: DLT-like algorithm and its variants
Shi, Kunfeng; Dong, Qiulei; Wu, Fuchao
发表期刊IMAGE AND VISION COMPUTING
2014-02-01
卷号32期号:2页码:155-168
文章类型Article
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.
关键词Dlt-like Algorithm Euclidean Upgrading Multi-camera Calibration Segment Lengths Weighted Dlt-like Algorithm
WOS标题词Science & Technology ; Technology ; Physical Sciences
关键词[WOS]CAMERA CALIBRATION ; SELF-CALIBRATION ; AUTOCALIBRATION ; OBJECTS
收录类别SCI
语种英语
WOS研究方向Computer Science ; Engineering ; Optics
WOS类目Computer Science, Artificial Intelligence ; Computer Science, Software Engineering ; Computer Science, Theory & Methods ; Engineering, Electrical & Electronic ; Optics
WOS记录号WOS:000332905300005
引用统计
文献类型期刊论文
条目标识符http://ir.ia.ac.cn/handle/173211/2983
专题模式识别国家重点实验室_机器人视觉
通讯作者Shi, Kunfeng
作者单位Chinese Acad Sci, Inst Automat, Natl Lab Pattern Recognit, Beijing 100190, Peoples R China
第一作者单位模式识别国家重点实验室
通讯作者单位模式识别国家重点实验室
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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.
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