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A Global Calibration Method for Widely Distributed Cameras Based on Vanishing Features

This paper presents a global calibration method for widely distributed vision sensors in ring-topologies. Planar target with two mutually orthogonal groups of parallel lines is needed for each camera. Firstly, the relative pose of each camera and its corresponding target is found from the vanishing...

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Detalles Bibliográficos
Autores principales: Wu, Xiaolong, Wu, Sentang, Xing, Zhihui, Jia, Xiang
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4934264/
https://www.ncbi.nlm.nih.gov/pubmed/27338386
http://dx.doi.org/10.3390/s16060838
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author Wu, Xiaolong
Wu, Sentang
Xing, Zhihui
Jia, Xiang
author_facet Wu, Xiaolong
Wu, Sentang
Xing, Zhihui
Jia, Xiang
author_sort Wu, Xiaolong
collection PubMed
description This paper presents a global calibration method for widely distributed vision sensors in ring-topologies. Planar target with two mutually orthogonal groups of parallel lines is needed for each camera. Firstly, the relative pose of each camera and its corresponding target is found from the vanishing points and lines. Next, an auxiliary camera is used to find the relative poses between neighboring pairs of calibration targets. Then the relative pose from each target to the reference target is initialized by the chain of transformations, followed by nonlinear optimization based on the constraint of ring-topologies. Lastly, the relative poses between the cameras are found from the relative poses of calibration targets. Synthetic data, simulation images and real experiments all demonstrate that the proposed method is reliable and accurate. The accumulated error due to multiple coordinate transformations can be adjusted effectively by the proposed method. In real experiment, eight targets are located in an area about 1200 mm × 1200 mm. The accuracy of the proposed method is about 0.465 mm when the times of coordinate transformations reach a maximum. The proposed method is simple and can be applied to different camera configurations.
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spelling pubmed-49342642016-07-06 A Global Calibration Method for Widely Distributed Cameras Based on Vanishing Features Wu, Xiaolong Wu, Sentang Xing, Zhihui Jia, Xiang Sensors (Basel) Article This paper presents a global calibration method for widely distributed vision sensors in ring-topologies. Planar target with two mutually orthogonal groups of parallel lines is needed for each camera. Firstly, the relative pose of each camera and its corresponding target is found from the vanishing points and lines. Next, an auxiliary camera is used to find the relative poses between neighboring pairs of calibration targets. Then the relative pose from each target to the reference target is initialized by the chain of transformations, followed by nonlinear optimization based on the constraint of ring-topologies. Lastly, the relative poses between the cameras are found from the relative poses of calibration targets. Synthetic data, simulation images and real experiments all demonstrate that the proposed method is reliable and accurate. The accumulated error due to multiple coordinate transformations can be adjusted effectively by the proposed method. In real experiment, eight targets are located in an area about 1200 mm × 1200 mm. The accuracy of the proposed method is about 0.465 mm when the times of coordinate transformations reach a maximum. The proposed method is simple and can be applied to different camera configurations. MDPI 2016-06-08 /pmc/articles/PMC4934264/ /pubmed/27338386 http://dx.doi.org/10.3390/s16060838 Text en © 2016 by the authors; licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC-BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Wu, Xiaolong
Wu, Sentang
Xing, Zhihui
Jia, Xiang
A Global Calibration Method for Widely Distributed Cameras Based on Vanishing Features
title A Global Calibration Method for Widely Distributed Cameras Based on Vanishing Features
title_full A Global Calibration Method for Widely Distributed Cameras Based on Vanishing Features
title_fullStr A Global Calibration Method for Widely Distributed Cameras Based on Vanishing Features
title_full_unstemmed A Global Calibration Method for Widely Distributed Cameras Based on Vanishing Features
title_short A Global Calibration Method for Widely Distributed Cameras Based on Vanishing Features
title_sort global calibration method for widely distributed cameras based on vanishing features
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4934264/
https://www.ncbi.nlm.nih.gov/pubmed/27338386
http://dx.doi.org/10.3390/s16060838
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