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Uncalibrated motion capture exploiting articulated structure constraints
KTH, Tidigare Institutioner                               , Numerisk analys och datalogi, NADA.
2003 (engelsk)Inngår i: International Journal of Computer Vision, ISSN 0920-5691, E-ISSN 1573-1405, Vol. 51, nr 3, s. 171-187Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

We present an algorithm for 3D reconstruction of dynamic articulated structures, such as humans, from uncalibrated multiple views. The reconstruction exploits constraints associated with a dynamic articulated structure, specifically the conservation over time of length between rotational joints. These constraints admit reconstruction of metric structure from at least two different images in each of two uncalibrated parallel projection cameras. As a by product, the calibration of the cameras can also be computed. The algorithm is based on a stratified approach, starting with affine reconstruction from factorization, followed by rectification to metric structure using the articulated structure constraints. The exploitation of these specific constraints admits reconstruction and self-calibration with fewer feature points and views compared to standard self-calibration. The method is extended to pairs of cameras that are zooming, where calibration of the cameras allows compensation for the changing scale factor in a scaled orthographic camera. Results are presented in the form of stick figures and animated 3D reconstructions using pairs of sequences from broadcast television. The technique shows promise as a means of creating 3D animations of dynamic activities such as sports events.

sted, utgiver, år, opplag, sider
2003. Vol. 51, nr 3, s. 171-187
Emneord [en]
motion capture, calibration, multiple views, 3D reconstruction, self-calibration, affine structure, camera
Identifikatorer
URN: urn:nbn:se:kth:diva-22159ISI: 000180297500001OAI: oai:DiVA.org:kth-22159DiVA, id: diva2:340857
Merknad
QC 20100525Tilgjengelig fra: 2010-08-10 Laget: 2010-08-10 Sist oppdatert: 2017-12-12bibliografisk kontrollert

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