ArticleBiomedical optics express2017
The value of polarization in camera-based photoplethysmography.
Article in Biomedical optics express, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
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Who cites it
10 citing papers in PubMed, 27 citations in OpenAlex.
- Imaging photoplethysmography as an easy-to-use tool for monitoring changes in tissue blood perfusion during abdominal surgery.Scientific reports · 2022Trial
- A comprehensive review of heart rate measurement using remote photoplethysmography and deep learning.Biomedical engineering online · 2025Review
- Plethysmographic assessment of vasomotor response in patients with congestive heart failure before and after heart transplantation.Biomedical optics express · 2024Article
- Capturing the pulse: a state-of-the-art review on camera-based jugular vein assessment.Biomedical optics express · 2023Review
- Photoplethysmographic Imaging of Hemodynamics and Two-Dimensional Oximetry.Optics and spectroscopy · 2022Article
- Association of remote imaging photoplethysmography and cutaneous perfusion in volunteers.Scientific reports · 2020Article
- PulseCam: a camera-based, motion-robust and highly sensitive blood perfusion imaging modality.Scientific reports · 2020Article
- An open-source remote heart rate imaging method with practical apparatus and algorithms.Behavior research methods · 2019Article
- A Broader Look: Camera-Based Vital Sign Estimation across the Spectrum.Yearbook of medical informatics · 2019Review
- Contactless monitoring of the blood-flow changes in upper limbs.Biomedical optics express · 2018Article
Corrections and comments
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Authors and funding
5 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
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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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.