The use of ambient light in remote photoplethysmographic systems_a comparison between a high performance camera and a low cost webcam.pdf (3.29 MB)
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Use of ambient light in remote photoplethysmographic systems: comparison between a high-performance camera and a low-cost webcam

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journal contribution
posted on 20.05.2016, 08:34 by Yu Sun, Charlotte Papin, V Azorin-Peris, Roy KalawskyRoy Kalawsky, Stephen Greenwald, Sijung HuSijung Hu
Imaging photoplethysmography (PPG) is able to capture useful physiological data remotely from a wide range of anatomical locations. Recent imaging PPG studies have concentrated on two broad research directions involving either high-performance cameras and or webcam-based systems. However, little has been reported about the difference between these two techniques, particularly in terms of their performance under illumination with ambient light. We explore these two imaging PPG approaches through the simultaneous measurement of the cardiac pulse acquired from the face of 10 male subjects and the spectral characteristics of ambient light. Measurements are made before and after a period of cycling exercise. The physiological pulse waves extracted from both imaging PPG systems using the smoothed pseudo-Wigner-Ville distribution yield functional characteristics comparable to those acquired using gold standard contact PPG sensors. The influence of ambient light intensity on the physiological information is considered, where results reveal an independent relationship between the ambient light intensity and the normalized plethysmographic signals. This provides further support for imaging PPG as a means for practical noncontact physiological assessment with clear applications in several domains, including telemedicine and homecare.

Funding

This work was supported by the National Institute for Health Research under Grant No. PD1: II–FS–0109–11005.

History

School

  • Mechanical, Electrical and Manufacturing Engineering

Published in

JOURNAL OF BIOMEDICAL OPTICS

Volume

17

Issue

3

Pages

? - ? (10)

Citation

SUN, Y. ... et al., 2012. Use of ambient light in remote photoplethysmographic systems: comparison between a high-performance camera and a low-cost webcam. Journal of Biomedical Optics, DOI: 10.1117/1.JBO.17.3.037005.

Publisher

© Society of Photo-Optical Instrumentation Engineers

Version

VoR (Version of Record)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution 3.0 Unported (CC BY 3.0) licence. Full details of this licence are available at: http://creativecommons.org/licenses/by/3.0/

Publication date

2012

Notes

© 2012 Society of Photo Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.

ISSN

1083-3668

eISSN

1560-2281

Language

en