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Conference Paper: Self-calibration and motion recovery from silhouettes with two mirrors
Title | Self-calibration and motion recovery from silhouettes with two mirrors |
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Authors | |
Keywords | Calibration problems Circular motion Motion recovery Self calibration Self-calibrating |
Issue Date | 2013 |
Publisher | Springer 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? |
Abstract | This 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. |
Description | LNCS v. 7724-7727 (pts. 1-4) entitled: Computer vision - ACCV 2012: 11th Asian Conference on Computer Vision ... 2012: revised selected papers |
Persistent Identifier | http://hdl.handle.net/10722/177407 |
ISBN | |
ISSN | 2023 SCImago Journal Rankings: 0.606 |
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Zhang, H | en_US |
dc.contributor.author | Shao, L | en_US |
dc.contributor.author | Wong, KKY | en_US |
dc.date.accessioned | 2012-12-18T05:08:39Z | - |
dc.date.available | 2012-12-18T05:08:39Z | - |
dc.date.issued | 2013 | en_US |
dc.identifier.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 | en_US |
dc.identifier.isbn | 978-364237446-3 | - |
dc.identifier.issn | 0302-9743 | - |
dc.identifier.uri | http://hdl.handle.net/10722/177407 | - |
dc.description | LNCS v. 7724-7727 (pts. 1-4) entitled: Computer vision - ACCV 2012: 11th Asian Conference on Computer Vision ... 2012: revised selected papers | - |
dc.description.abstract | This 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.language | eng | en_US |
dc.publisher | Springer Verlag. The Journal's web site is located at http://springerlink.com/content/105633/ | - |
dc.relation.ispartof | Lecture Notes in Computer Science | en_US |
dc.rights | The original publication is available at www.springerlink.com | - |
dc.subject | Calibration problems | - |
dc.subject | Circular motion | - |
dc.subject | Motion recovery | - |
dc.subject | Self calibration | - |
dc.subject | Self-calibrating | - |
dc.title | Self-calibration and motion recovery from silhouettes with two mirrors | en_US |
dc.type | Conference_Paper | en_US |
dc.identifier.email | Wong, KKY: kykwong@cs.hku.hk | en_US |
dc.identifier.authority | Wong, KKY=rp01393 | en_US |
dc.description.nature | postprint | - |
dc.identifier.doi | 10.1007/978-3-642-37447-0_1 | - |
dc.identifier.scopus | eid_2-s2.0-84875891398 | - |
dc.identifier.hkuros | 212817 | en_US |
dc.identifier.volume | 7727 | - |
dc.identifier.spage | 1 | - |
dc.identifier.epage | 12 | - |
dc.publisher.place | Germany | - |
dc.customcontrol.immutable | sml 140219 | - |
dc.identifier.issnl | 0302-9743 | - |