Loughborough University
Motion-compensated noncontact imaging.pdf (818.8 kB)

Motion-compensated noncontact imaging photoplethysmography to monitor cardiorespiratory status during exercise

Download (818.8 kB)
journal contribution
posted on 2016-08-03, 09:31 authored by Yu Sun, Sijung HuSijung Hu, V Azorin-Peris, Stephen Greenwald, Jonathon Chambers, Yisheng Zhu
With the advance of computer and photonics technology, imaging photoplethysmography [(PPG), iPPG] can provide comfortable and comprehensive assessment over a wide range of anatomical locations. However, motion artifact is a major drawback in current iPPG systems, particularly in the context of clinical assessment. To overcome this issue, a new artifact-reduction method consisting of planar motion compensation and blind source separation is introduced in this study. The performance of the iPPG system was evaluated through the measurement of cardiac pulse in the hand from 12 subjects before and after 5 min of cycling exercise. Also, a 12-min continuous recording protocol consisting of repeated exercises was taken from a single volunteer. The physiological parameters (i.e., heart rate, respiration rate), derived from the images captured by the iPPG system, exhibit functional characteristics comparable to conventional contact PPG sensors. Continuous recordings from the iPPG system reveal that heart and respiration rates can be successfully tracked with the artifact reduction method even in high-intensity physical exercise situations. The outcome from this study thereby leads to a new avenue for noncontact sensing of vital signs and remote physiological assessment, with clear applications in triage and sports training.


The authors thank the NIHR, UK (Grant No. FPD1 II-FS- 0109-11005) for their financial support.



  • Mechanical, Electrical and Manufacturing Engineering

Published in

Journal of Biomedical Optics






. 077010(1 - 9)


SUN, Y. ... et al., 2011. Motion-compensated noncontact imaging photoplethysmography to monitor cardiorespiratory status during exercise. Journal of Biomedical Optics, 16 (7), DOI: 10.1117/1.3602852.




  • VoR (Version of Record)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution 4.0 International (CC BY 4.0) licence. Full details of this licence are available at: http://creativecommons.org/licenses/ by/4.0/

Publication date



© 2011 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.






  • en