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Conference Paper: Self-calibration and motion recovery from silhouettes with two mirrors

TitleSelf-calibration and motion recovery from silhouettes with two mirrors
Authors
KeywordsCalibration problems
Circular motion
Motion recovery
Self calibration
Self-calibrating
Issue Date2013
PublisherSpringer Verlag. The Journal's web site is located at http://springerlink.com/content/105633/
Citation
The 11th Asian Conference on Computer Vision (ACCV 2012), Daejeon, South Korea, 5-9 November 2012. In Lecture Notes in Computer Science, 2013, v. 7727, p. 1-12 How to Cite?
AbstractThis paper addresses the problem of self-calibration and motion recovery from a single snapshot obtained under a setting of two mirrors. The mirrors are able to show five views of an object in one image. In this paper, the epipoles of the real and virtual cameras are firstly estimated from the intersection of the bitangent lines between corresponding images, from which we can easily derive the horizon of the camera plane. The imaged circular points and the angle between the mirrors can then be obtained from equal angles between the bitangent lines, by planar rectification. The silhouettes produced by reflections can be treated as a special circular motion sequence. With this observation, technique developed for calibrating a circular motion sequence can be exploited to simplify the calibration of a single-view two-mirror system. Different from the state-of-the-art approaches, only one snapshot is required in this work for self-calibrating a natural camera and recovering the poses of the two mirrors. This is more flexible than previous approaches which require at least two images. When more than a single image is available, each image can be calibrated independently and the problem of varying focal length does not complicate the calibration problem. After the calibration, the visual hull of the objects can be obtained from the silhouettes. Experimental results show the feasibility and the preciseness of the proposed approach. © 2013 Springer-Verlag.
DescriptionLNCS v. 7724-7727 (pts. 1-4) entitled: Computer vision - ACCV 2012: 11th Asian Conference on Computer Vision ... 2012: revised selected papers
Persistent Identifierhttp://hdl.handle.net/10722/177407
ISBN
ISSN
2005 Impact Factor: 0.402
2015 SCImago Journal Rankings: 0.252

 

DC FieldValueLanguage
dc.contributor.authorZhang, Hen_US
dc.contributor.authorShao, Len_US
dc.contributor.authorWong, KKYen_US
dc.date.accessioned2012-12-18T05:08:39Z-
dc.date.available2012-12-18T05:08:39Z-
dc.date.issued2013en_US
dc.identifier.citationThe 11th Asian Conference on Computer Vision (ACCV 2012), Daejeon, South Korea, 5-9 November 2012. In Lecture Notes in Computer Science, 2013, v. 7727, p. 1-12en_US
dc.identifier.isbn978-364237446-3-
dc.identifier.issn0302-9743-
dc.identifier.urihttp://hdl.handle.net/10722/177407-
dc.descriptionLNCS v. 7724-7727 (pts. 1-4) entitled: Computer vision - ACCV 2012: 11th Asian Conference on Computer Vision ... 2012: revised selected papers-
dc.description.abstractThis paper addresses the problem of self-calibration and motion recovery from a single snapshot obtained under a setting of two mirrors. The mirrors are able to show five views of an object in one image. In this paper, the epipoles of the real and virtual cameras are firstly estimated from the intersection of the bitangent lines between corresponding images, from which we can easily derive the horizon of the camera plane. The imaged circular points and the angle between the mirrors can then be obtained from equal angles between the bitangent lines, by planar rectification. The silhouettes produced by reflections can be treated as a special circular motion sequence. With this observation, technique developed for calibrating a circular motion sequence can be exploited to simplify the calibration of a single-view two-mirror system. Different from the state-of-the-art approaches, only one snapshot is required in this work for self-calibrating a natural camera and recovering the poses of the two mirrors. This is more flexible than previous approaches which require at least two images. When more than a single image is available, each image can be calibrated independently and the problem of varying focal length does not complicate the calibration problem. After the calibration, the visual hull of the objects can be obtained from the silhouettes. Experimental results show the feasibility and the preciseness of the proposed approach. © 2013 Springer-Verlag.-
dc.languageengen_US
dc.publisherSpringer Verlag. The Journal's web site is located at http://springerlink.com/content/105633/-
dc.relation.ispartofLecture Notes in Computer Scienceen_US
dc.rightsThe original publication is available at www.springerlink.com-
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.subjectCalibration problems-
dc.subjectCircular motion-
dc.subjectMotion recovery-
dc.subjectSelf calibration-
dc.subjectSelf-calibrating-
dc.titleSelf-calibration and motion recovery from silhouettes with two mirrorsen_US
dc.typeConference_Paperen_US
dc.identifier.emailWong, KKY: kykwong@cs.hku.hken_US
dc.identifier.authorityWong, KKY=rp01393en_US
dc.description.naturepostprint-
dc.identifier.doi10.1007/978-3-642-37447-0_1-
dc.identifier.scopuseid_2-s2.0-84875891398-
dc.identifier.hkuros212817en_US
dc.identifier.volume7727-
dc.identifier.spage1-
dc.identifier.epage12-
dc.publisher.placeGermany-
dc.customcontrol.immutablesml 140219-

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