Bulletin of the American Physical Society
APS March Meeting 2019
Volume 64, Number 2
Monday–Friday, March 4–8, 2019; Boston, Massachusetts
Session T70: Poster Session III(1:00pm-4:00pm)
1:00 PM,
Thursday, March 7, 2019
BCEC
Room: Exhibit Hall
Abstract: T70.00012 : Hyperspectral imaging of human hands and curvature correction*
Presenter:
Matija Milanic
(Faculty of Mathematics and Physics, University of Ljubljana, Ljubljana, Slovenia)
Authors:
Luka Rogelj
(Faculty of Mathematics and Physics, University of Ljubljana, Ljubljana, Slovenia)
Urban Pavlovčič
(Faculty of Mechanical Engineering University of Ljubljana, Ljubljana, Slovenia)
Jošt Stergar
(Faculty of Mathematics and Physics, University of Ljubljana, Ljubljana, Slovenia)
Rok Dolenec
(Faculty of Mathematics and Physics, University of Ljubljana, Ljubljana, Slovenia)
Matija Jezeršek
(Faculty of Mechanical Engineering University of Ljubljana, Ljubljana, Slovenia)
Matija Milanic
(Faculty of Mathematics and Physics, University of Ljubljana, Ljubljana, Slovenia)
Urban Simončič
(Faculty of Mathematics and Physics, University of Ljubljana, Ljubljana, Slovenia)
An imaged surface curvature significantly affects illumination distribution over the surface and thus introduces artifacts in the recorded HSI. Such artifacts markedly affect accuracy of the image analysis, therefore a curvature correction of the images should be performed. In this study, hands of human volunteers were imaged by a HSI system (400–1000 nm spectral range) and a laser triangulation profilomer (LTP) providing 3D surface of the hands. Lambert cosine law and height corrections were applied to the recorded images. The corrected images show improved illumination homogeneity, effectively eliminating the curvature artifacts.
By combining HSI and LTP, hyperspectral images can be successfully corrected for the curvature artifacts, greatly improving accuracy of the further image analysis (original image discrepancy 12 %, corrected image discrepancy 4 %).
*Slovenian Research Agency (research core funding No. P1-0389 and project J2-8171).
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