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Proceedings Paper

Wide-field 3D imaging with an LED pattern projector for accurate skin feature measurements via Fourier transform profilometry
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Paper Abstract

Accurate 3D imaging of human skin features with structured light methods is hindered by subsurface scattering, the presence of hairs and patient movement. In this work, we propose a wide-field 3D imaging system capable of reconstructing large areas, e.g. the whole surface of the forearm, with an axial accuracy in the order of 10 microns for measuring scattered skin features, like lesions. By pushing the limits of grating projection we obtain high-quality fringes within a limited depth of field. We use a second projector for accurate positioning of the object. With two or more cameras we achieve independent 3D reconstructions automatically merged in a global coordinate system. With the positioning strategy, we acquire two consecutive images for absolute phase retrieval using Fourier Transform Profilometry to ensure accurate phase-to-height mapping. Encouraging experimental results show that the system is able to measure precisely skin features scattered in a large area.

Paper Details

Date Published: 13 May 2019
PDF: 8 pages
Proc. SPIE 10991, Dimensional Optical Metrology and Inspection for Practical Applications VIII, 1099102 (13 May 2019); doi: 10.1117/12.2518649
Show Author Affiliations
Andrés G. Marrugo, Univ. Tecnológica de Bolívar (Colombia)
Lenny A. Romero, Univ. Tecnológica de Bolívar (Colombia)
Jaime Meneses, Univ. Industrial de Santander (Colombia)

Published in SPIE Proceedings Vol. 10991:
Dimensional Optical Metrology and Inspection for Practical Applications VIII
Kevin G. Harding; Song Zhang, Editor(s)

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