The value of polarization in camera-based photoplethysmography

  • Camera-based photoplethysmography (cbPPG) is a novel measuring technique that permits the remote acquisition of cardiovascular signals using video cameras. Research still lacks in fundamental studies to reach a deeper technical and physiological understanding. This work analyzes the employment of polarization filtration to (i) assess the gain for the signal quality and (ii) draw conclusions about the cbPPG signal’s origin. We evaluated various forehead regions of 18 recordings with different color and filter settings. Our results prove that for an optimal illumination, the perpendicular filter setting provides a significant benefit. The outcome supports the theory that signals arise from blood volume changes. For lateral illumination, ballistocardiographic effects dominate the signal as polarization’s impact vanishes.

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Author:Alexander Trumpp, Philipp L. Bauer, Stefan Rasche, Hagen Malberg, Sebastian ZaunsederGND
Frontdoor URL
Parent Title (English):Biomedical Optics Express
Publisher:The Optical Society
Year of first Publication:2017
Publishing Institution:Universität Augsburg
Release Date:2022/12/01
Tag:Atomic and Molecular Physics, and Optics; Biotechnology
First Page:2822
Last Page:2834
Institutes:Fakultät für Angewandte Informatik
Fakultät für Angewandte Informatik / Institut für Informatik
Fakultät für Angewandte Informatik / Institut für Informatik / Professur für Diagnostische Sensorik
Dewey Decimal Classification:0 Informatik, Informationswissenschaft, allgemeine Werke / 00 Informatik, Wissen, Systeme / 004 Datenverarbeitung; Informatik
Licence (German):Deutsches Urheberrecht