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. 2020 Oct 21;10:17940. doi: 10.1038/s41598-020-74954-5

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© The Author(s) 2020

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Comparing ECG and EVM HR estimates. (A) Raw ECG exemplar sample. (B) ECG inter-peak interval estimate (gray) and pulse rate running average (black) in time. (C) Time frequency spectrogram of EVM processed video data. Highest power frequency band (yellow) corresponds to the HR estimate. (D) EVM peak frequency estimate (gray) and corresponding pulse rate running average (light gray) in time. (E) Overlay of ECG (black) and EVM (light gray) based running average pulse rates estimates in time. (F) Coherence between ECG and EVM HR estimates.