Title
Marker-referred movement measurement with grey-scale coordinate extraction for high-resolution real-time 3D at 100 Hz
Author
TNO Fysisch en Elektronisch Laboratorium
Furnée, E.H.
Jobbá, A.
Sabel, J.C.
van Veenendaal, H.L.J.
Martin, F.
Andriessen, D.C.W.G.
Publication year
1997
Abstract
A review of early history in photography highlights the origin of cinefilm as a scientific tool for image-based measurement of human and animal motion. The paper is concerned with scanned-area video sensors (CCD) and a computer interface for the real-time, high-resolution extraction of image coordinates of moving markers. Algorithms and implementations are reviewed for the estimation of marker midpoints. Two-valued (above-threshold) representations of the video signal, as well as grey-scale digitizing are discussed. Attainable resolutions and computational effort are presented. Distributed, per-camera processing is a new option, which uses an embedded microcomputer for image reduction to real-time marker midpoint data. Developments are discussed in 3-D camera calibration and in the real-time 3-D matching of marker images, essential in realtime 3-D reconstruction. Applications are in 3-D motion capture for animation and in motion analysis of wind turbine rotors.
Subject
Animation
Coordinates
Location
Markers, embedded image processing
Markertracking
Motion analysis
Motion capture
Real-time
Wind turbines
Cameras
Computer graphics
Digital image storage
High speed photography
Image processing
Interfaces (computer)
Military photography
Coordinates
Grey-scale processing
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http://resolver.tudelft.nl/uuid:1a7ea57b-05e4-4b0b-b32c-813cb4e7e285
DOI
https://doi.org/10.1117/12.294548
TNO identifier
234174
Publisher
SPIE, Bellingham,WA
Source
Ultrahigh- and High-Speed Photography and Image-based Motion Measurement, 28 July 1997, San Diego, CA, USA, 357-369
Series
Proceedings of SPIE
Document type
conference paper