Structured-Light-Based System for Shape Measurement of the Human Body in Motion

Sensors
Paweł LiberadzkiRobert Sitnik

Abstract

The existing methods for measuring the shape of the human body in motion are limited in their practical application owing to immaturity, complexity, and/or high price. Therefore, we propose a method based on structured light supported by multispectral separation to achieve multidirectional and parallel acquisition. Single-frame fringe projection is employed in this method for detailed geometry reconstruction. An extended phase unwrapping method adapted for measurement of the human body is also proposed. This method utilizes local fringe parameter information to identify the optimal unwrapping path for reconstruction. Subsequently, we present a prototype 4DBODY system with a working volume of 2.0 × 1.5 × 1.5 m³, a measurement uncertainty less than 0.5 mm and an average spatial resolution of 1.0 mm for three-dimensional (3D) points. The system consists of eight directional 3D scanners functioning synchronously with an acquisition frequency of 120 Hz. The efficacy of the proposed system is demonstrated by presenting the measurement results obtained for known geometrical objects moving at various speeds as well actual human movements.

References

Aug 14, 2008·Medical Physics·Christian SchallerJoachim Hornegger
May 1, 2012·Medical Image Analysis·Christoph SchmalzElli Angelopoulou
May 23, 2012·Journal of Biomedical Optics·Jakub MichońskiRobert Sitnik
Jun 26, 2012·Forensic Science International : Synergy·Ursula BuckMichael J Thali
Jun 1, 2013·Journal of Biomedical Optics·Janusz LenarNico Verdonschot
Jan 1, 2014·Advances in Medicine·Aaron GipsmanPatrick Knott

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Citations

Jan 16, 2020·Materials·Jorge Barrios-MurielDavid Rodríguez Salgado
Mar 3, 2021·The Review of Scientific Instruments·Marta RępalskaMarek Kulus

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Software Mentioned

3dMD
4DBODY
4DSCANNER
OGX

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