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Proceedings Paper

Shape and motion measurement of time-varying objects based on spatio-temporal image analysis for multimedia applications
Author(s): Michal Emanuel Pawlowski; Malgorzata Kujawinska
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Paper Abstract

The basic methodologies used in animation are presented and their most significant problems connected with combining real and virtual worlds are recognized. The optical method of shape and movement determination is proposed for fast virtual object generation. Combination of fringe projection technique with photogrammetry is used to calculate the shape and position of the object points. The object surface during the measurement is illuminated by DMD projector and observed by two spatially separated CCD detectors. The time varying fringe pattern observed on the object surface is analyzed by spatial carrier phase shifting algorithm to determine the actual shape. The analysis of fiducial point's positions on two CCD detectors during the measurement provides an information about their points 3D co-ordinates within the measurement volume. Combined information about actual object shape and its position in time (as a rigid body motion) during the measurement enables to generate a virtual model of the object together with the description of its movement. The concept described above is experimentally tested and exemplary results of measurement of human body parts are presented. The brief error analysis is presented. The further works to implement this technique are discussed.

Paper Details

Date Published: 23 May 2002
PDF: 9 pages
Proc. SPIE 4660, Stereoscopic Displays and Virtual Reality Systems IX, (23 May 2002); doi: 10.1117/12.468054
Show Author Affiliations
Michal Emanuel Pawlowski, Warsaw Univ. of Technology (Poland)
Malgorzata Kujawinska, Warsaw Univ. of Technology (Poland)

Published in SPIE Proceedings Vol. 4660:
Stereoscopic Displays and Virtual Reality Systems IX
Mark T. Bolas; Andrew J. Woods; John O. Merritt; Stephen A. Benton; Mark T. Bolas, Editor(s)

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