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. 2020 Apr 13;20(8):2171. doi: 10.3390/s20082171

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© 2020 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Block diagram of signal processing for HR estimation. (a) RGB video with ROI detected by OpenCV. (b) RGB ROI image applied to tapered window. (c) Raw RGB time-series data and reconstruction vector $V = (v_{r}, v_{g}, v_{b})$ determined by kurtosis of spectra. (d) Reconstructed signal using V. (e) Power spectra obtained by MUSIC.