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A camera model for cameras with hypercentric lenses and some example applications

Ulrich, Markus; Steger, Carsten

Abstract:
We propose a camera model for cameras with hypercentric lenses. Because of their geometry, hypercentric lenses allow to image the top and the sides of an object simultaneously. This makes them useful for certain inspections tasks, for which otherwise multiple images would have to be acquired and stitched together. After describing the projection geometry of hypercentric lenses, we derive a camera model for hypercentric lenses that is intuitive for the user. Furthermore, we describe how to determine the parameter values of the model by calibrating the camera with a planar calibration object. We also apply our camera model to two example applications: in the first application, we show how two cameras with hypercentric lenses can be used for dense 3D reconstruction. For an efficient reconstruction, the images are rectified such that corresponding points occur in the same image row. Standard rectification methods would result in perspective distortions in the images that would prevent stereo matching algorithms from robustly establishing correspondences. Therefore, we propose a new rectification method for objects that are approximately cylindrical in shape, which enables a robust and efficient reconstruction. ... mehr

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Verlagsausgabe §
DOI: 10.5445/IR/1000118709
Veröffentlicht am 04.05.2020
Originalveröffentlichung
DOI: 10.1007/s00138-019-01032-w
Scopus
Zitationen: 1
Web of Science
Zitationen: 1
Cover der Publikation
Zugehörige Institution(en) am KIT Fakultät für Bauingenieur-, Geo- und Umweltwissenschaften (BGU)
Institut für Photogrammetrie und Fernerkundung (IPF)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2019
Sprache Englisch
Identifikator ISSN: 0932-8092, 1432-1769
KITopen-ID: 1000118709
Erschienen in Machine vision and applications
Verlag Springer
Band 30
Heft 6
Seiten 1013–1028
Nachgewiesen in Scopus
Web of Science
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