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Towards smooth generic camera calibration. Technical Report IES-2014-06

Pak, Alexey

Abstract:
In the common approach to the generic camera calibration (GCC), one uses dense ray coding (with e.g. active grids displayed on an LCD screen) in order to find the ray origin and direction for each camera pixel independently. While applicable to many types of imaging sensors, the GCC fails to describe the local differential properties of ray bundles that are important in e.g. studying the geometry of infinitesimal scene changes via optical flow. In this report, we investigate the alternative approach to the GCC where the camera ray origins and directions are assumed to be differentiable functions of the sensor position. In particular, we present a novel calibration technique based on finite element method that unites the ray update and bundle adjustment stages of the common GCC and accommodates arbitrary anisotropic coding uncertainties and non-planar coding surfaces. The accuracy and the stability of the resulting smooth generic camera calibration (sGCC) algorithm are verified based on some non-trivial synthetic examples.


Zugehörige Institution(en) am KIT Institut für Anthropomatik und Robotik (IAR)
Publikationstyp Proceedingsbeitrag
Jahr 2015
Sprache Englisch
Identifikator ISBN: 978-3-7315-0401-6
ISSN: 1863-6489
URN: urn:nbn:de:swb:90-486954
KITopen ID: 1000048695
Erschienen in Proceedings of the 2014 Joint Workshop of Fraunhofer IOSB and Institute for Anthropomatics, Vision and Fusion Laboratory. Ed.: J. Beyerer
Verlag KIT Scientific Publishing, Karlsruhe
Seiten 67-75
Serie Karlsruher Schriften zur Anthropomatik / Lehrstuhl für Interaktive Echtzeitsysteme, Karlsruher Institut für Technologie ; Fraunhofer-Inst. für Optronik, Systemtechnik und Bildauswertung IOSB Karlsruhe ; 20
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