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Proceedings Paper

The reliability and accuracy of estimating heart-rates from RGB video recorded on a consumer grade camera
Author(s): Adam Eaton; Vinoin Vincely; Paige Lloyd; Kurt Hugenberg; Karthik Vishwanath
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Paper Abstract

Video Photoplethysmography (VPPG) is a numerical technique to process standard RGB video data of exposed human skin and extracting the heart-rate (HR) from the skin areas. Being a non-contact technique, VPPG has the potential to provide estimates of subject’s heart-rate, respiratory rate, and even the heart rate variability of human subjects with potential applications ranging from infant monitors, remote healthcare and psychological experiments, particularly given the non-contact and sensor-free nature of the technique. Though several previous studies have reported successful correlations in HR obtained using VPPG algorithms to HR measured using the gold-standard electrocardiograph, others have reported that these correlations are dependent on controlling for duration of the video-data analyzed, subject motion, and ambient lighting. Here, we investigate the ability of two commonly used VPPG-algorithms in extraction of human heart-rates under three different laboratory conditions. We compare the VPPG HR values extracted across these three sets of experiments to the gold-standard values acquired by using an electrocardiogram or a commercially available pulseoximeter. The two VPPG-algorithms were applied with and without KLT-facial feature tracking and detection algorithms from the Computer Vision MATLAB® toolbox. Results indicate that VPPG based numerical approaches have the ability to provide robust estimates of subject HR values and are relatively insensitive to the devices used to record the video data. However, they are highly sensitive to conditions of video acquisition including subject motion, the location, size and averaging techniques applied to regions-of-interest as well as to the number of video frames used for data processing.

Paper Details

Date Published: 3 March 2017
PDF: 7 pages
Proc. SPIE 10055, Optics and Biophotonics in Low-Resource Settings III, 100550Y (3 March 2017); doi: 10.1117/12.2252629
Show Author Affiliations
Adam Eaton, Miami Univ. (United States)
Vinoin Vincely, Miami Univ. (United States)
Paige Lloyd, Miami Univ. (United States)
Kurt Hugenberg, Miami Univ. (United States)
Karthik Vishwanath, Miami Univ. (United States)

Published in SPIE Proceedings Vol. 10055:
Optics and Biophotonics in Low-Resource Settings III
David Levitz; Aydogan Ozcan; David Erickson, Editor(s)

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