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Title: Frame registration for motion compensation in imaging photoplethysmography
Authors: Iakovlev, Dmitry
Hu, Sijung
Dwyer, Vincent M.
Keywords: Frame registration
Imaging photoplethysmography (iPPG)
Remote sensing
Heart rate measurement
Motion artifact
Motion compensation
Signal processing
Region of interest (ROI)
Issue Date: 2018
Publisher: © the Authors. Published by MDPI
Citation: IAKOVLEV, D., HU, S. and DWYER, V.M., 2018. Frame registration for motion compensation in imaging photoplethysmography. Sensors (Switzerland), 18(12): 4340.
Abstract: © 2018 by the authors. Licensee MDPI, Basel, Switzerland. Imaging photoplethysmography (iPPG) is an emerging technology used to assess microcirculation and cardiovascular signs by collecting backscattered light from illuminated tissue using optical imaging sensors. An engineering approach is used to evaluate whether a silicone cast of a human palm might be effectively utilized to predict the results of image registration schemes for motion compensation prior to their application on live human tissue. This allows us to establish a performance baseline for each of the algorithms and to isolate performance and noise fluctuations due to the induced motion from the temporally changing physiological signs. A multi-stage evaluation model is developed to qualitatively assess the influence of the region of interest (ROI), system resolution and distance, reference frame selection, and signal normalization on extracted iPPG waveforms from live tissue. We conclude that the application of image registration is able to deliver up to 75% signal-to-noise (SNR) improvement (4.75 to 8.34) over an uncompensated iPPG signal by employing an intensity-based algorithm with a moving reference frame.
Description: This is an Open Access Article. It is published by MDPI under the Creative Commons Attribution 4.0 Unported Licence (CC BY). Full details of this licence are available at: http://creativecommons.org/licenses/by/4.0/
Sponsor: The authors would also like to thank the PhD research sponsorship of EPSRC-mini CDT (2015–2018).
Version: Published
DOI: 10.3390/s18124340
URI: https://dspace.lboro.ac.uk/2134/36655
Publisher Link: https://doi.org/10.3390/s18124340
ISSN: 1424-8220
Appears in Collections:Published Articles (Mechanical, Electrical and Manufacturing Engineering)

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