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Article: New method for overcoming ill-conditioning in vanishing-point-based camera calibration

TitleNew method for overcoming ill-conditioning in vanishing-point-based camera calibration
Authors
KeywordsCamera calibration
Ill-conditioning
Near-parallel
Pan-tilt-zoom camera action
Vanishing point
Visual traffic surveillance
Issue Date2007
PublisherS P I E - International Society for Optical Engineering. The Journal's web site is located at http://www.spie.org/oe
Citation
Optical Engineering, 2007, v. 46 n. 3 How to Cite?
AbstractA common problem in vanishing-point-based camera calibration methods is that they are ill-conditioned when the parallel lines for calibration in the world coordinates also appear to be parallel or near-parallel in the image coordinates. Then the camera parameters are not calculable or incur substantial error because one of the vanishing points approaches infinity. We propose a new method that overcomes the ill-conditioning. Using lane markings on a road to form a rectangular calibration pattern with two vanishing points, we first derive a set of equations based on one vanishing point without assuming any extrinsic parameters being known a priori. Because only one vanishing point can approach infinity at any one time, ill-conditioning can be avoided completely by selecting the vanishing point that does not suffer from it. This enables us to produce a set of extrinsic camera parameters that maps the world and image coordinates accurately. Simulation and real image tests show that the proposed method conquers ill-conditioning successfully and is insensitive to pixel offset on the calibration pattern. © 2007 Society of Photo-Optical Instrumentation Engineers.
Persistent Identifierhttp://hdl.handle.net/10722/74067
ISSN
2015 Impact Factor: 0.984
2015 SCImago Journal Rankings: 0.485
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorHe, XCen_HK
dc.contributor.authorYung, NHCen_HK
dc.date.accessioned2010-09-06T06:57:29Z-
dc.date.available2010-09-06T06:57:29Z-
dc.date.issued2007en_HK
dc.identifier.citationOptical Engineering, 2007, v. 46 n. 3en_HK
dc.identifier.issn0091-3286en_HK
dc.identifier.urihttp://hdl.handle.net/10722/74067-
dc.description.abstractA common problem in vanishing-point-based camera calibration methods is that they are ill-conditioned when the parallel lines for calibration in the world coordinates also appear to be parallel or near-parallel in the image coordinates. Then the camera parameters are not calculable or incur substantial error because one of the vanishing points approaches infinity. We propose a new method that overcomes the ill-conditioning. Using lane markings on a road to form a rectangular calibration pattern with two vanishing points, we first derive a set of equations based on one vanishing point without assuming any extrinsic parameters being known a priori. Because only one vanishing point can approach infinity at any one time, ill-conditioning can be avoided completely by selecting the vanishing point that does not suffer from it. This enables us to produce a set of extrinsic camera parameters that maps the world and image coordinates accurately. Simulation and real image tests show that the proposed method conquers ill-conditioning successfully and is insensitive to pixel offset on the calibration pattern. © 2007 Society of Photo-Optical Instrumentation Engineers.en_HK
dc.languageengen_HK
dc.publisherS P I E - International Society for Optical Engineering. The Journal's web site is located at http://www.spie.org/oeen_HK
dc.relation.ispartofOptical Engineeringen_HK
dc.subjectCamera calibrationen_HK
dc.subjectIll-conditioningen_HK
dc.subjectNear-parallelen_HK
dc.subjectPan-tilt-zoom camera actionen_HK
dc.subjectVanishing pointen_HK
dc.subjectVisual traffic surveillanceen_HK
dc.titleNew method for overcoming ill-conditioning in vanishing-point-based camera calibrationen_HK
dc.typeArticleen_HK
dc.identifier.emailYung, NHC:nyung@eee.hku.hken_HK
dc.identifier.authorityYung, NHC=rp00226en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1117/1.2714991en_HK
dc.identifier.scopuseid_2-s2.0-34447267714en_HK
dc.identifier.hkuros134855en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-34447267714&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume46en_HK
dc.identifier.issue3en_HK
dc.identifier.isiWOS:000246351400038-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridHe, XC=16834640300en_HK
dc.identifier.scopusauthoridYung, NHC=7003473369en_HK

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