A multiphase calibration procedure for the direct linear transformation

Gespeichert in:
Bibliographische Detailangaben
Deutscher übersetzter Titel:Ein vielstufiges Kalibrierungsverfahren fuer die direkte lineare Transformation
Autor:Challis, John H.
Erschienen in:Journal of applied biomechanics
Veröffentlicht:11 (1995), 3, S. 351-358, Lit.
Format: Literatur (SPOLIT)
Publikationstyp: Zeitschriftenartikel
Medienart: Gedruckte Ressource Elektronische Ressource (Datenträger)
Sprache:Englisch
ISSN:1065-8483, 1543-2688
DOI:10.1123/jab.11.3.351
Schlagworte:
Online Zugang:
Erfassungsnummer:PU199511103796
Quelle:BISp

Abstract des Autors

In three-dimensional image-based motion analysis, the direct linear transformation (DLT) is commonly used to measure locations of significant body landmarks. The major drawback of the DLT is that the control points used for calibration must encompass the volume in which the activity occurs. A new procedure is presented where the calibration frame is moved sequentially, permitting calibration of a volume much larger than that encompassed by the calibration frame. A calibration frame with a volume of 0.6 m3 was used to calibrate a volume six times greater, by placing the frame in eight different positions. Reconstruction accuracy was comparable with that for the original frame position. This new multiphase calibration procedure presents the opportunity for calibrating large volumes using a small calibration frame; this may be advantageous, for example, in sporting arenas, where the transportation or manufacture of a sufficiently large calibration frame may be problematic. Verf.-Referat