Accurate measurement of imaging photoplethysmographic signals based camera using weighted average

Zongguang Pang; Lingqin Kong; Yuejin Zhao; Huijuan Sun; Liquan Dong; Mei Hui; Ming Liu; Xiaohua Liu; Lingling Liu; Xiaohui Li; Rongji Li

doi:10.1117/12.2288676

Accurate measurement of imaging photoplethysmographic signals based camera using weighted average

Zongguang Pang, Lingqin Kong^*, Yuejin Zhao, Huijuan Sun, Liquan Dong, Mei Hui, Ming Liu, Xiaohua Liu, Lingling Liu, Xiaohui Li, Rongji Li

^*Corresponding author for this work

School of Optics and Photonics

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

1 Citation (Scopus)

Abstract

Imaging photoplethysmography (IPPG) is an emerging technique for the extraction of vital signs of human being using video recordings. IPPG technology with its advantages, non-contact measurement, low cost and easy operation has become one research hot spot in the field of biomedicine. However, the noise disturbance cannot be removed because of the uneven distribution of micro-Arterial, incident light intensity of different regions, which results in a low signal noise ratio(SNK) of IPPG signals and low accuracy of heart rate. In this paper, we propose a method of improving the SNK of camera-based IPPG signals using weighted average. Firstly, we obtain the region of interest (ROI) of a subject's face by camera. Secondly, selected region is divided into 60 × 60 pixel block. Thirdly, the weight of PPG signal of each sub-region is calculated based on the signal-To-noise ratio of each sub-region. Finally, we combine the IPPG signal from all sub-regions using weighted average. Compared with method of mean of the whole region, this method can improve the SNK of IPPG signal to a certain extent. The heart rate deviation is within 3 beats, compared with traditional figure blood volume pulse senor.

Original language	English
Title of host publication	2017 International Conference on Optical Instruments and Technology
Subtitle of host publication	Optoelectronic Imaging/Spectroscopy and Signal Processing Technology
Editors	Guohai Situ, Wolfgang Osten, Xun Cao
Publisher	SPIE
ISBN (Electronic)	9781510617513
DOIs	https://doi.org/10.1117/12.2288676
Publication status	Published - 2018
Event	2017 International Conference on Optical Instruments and Technology: Optoelectronic Imaging/Spectroscopy and Signal Processing Technology, OIT 2017 - Beijing, China Duration: 28 Oct 2017 → 30 Oct 2017

Publication series

Name	Proceedings of SPIE - The International Society for Optical Engineering
Volume	10620
ISSN (Print)	0277-786X
ISSN (Electronic)	1996-756X

Conference

Conference	2017 International Conference on Optical Instruments and Technology: Optoelectronic Imaging/Spectroscopy and Signal Processing Technology, OIT 2017
Country/Territory	China
City	Beijing
Period	28/10/17 → 30/10/17

Keywords

Imaging photoplethysmography
Non-contact measurement
Region of interest
Weighted average

Access to Document

10.1117/12.2288676

Cite this

Pang, Z., Kong, L., Zhao, Y., Sun, H., Dong, L., Hui, M., Liu, M., Liu, X., Liu, L., Li, X., & Li, R. (2018). Accurate measurement of imaging photoplethysmographic signals based camera using weighted average. In G. Situ, W. Osten, & X. Cao (Eds.), 2017 International Conference on Optical Instruments and Technology: Optoelectronic Imaging/Spectroscopy and Signal Processing Technology Article 1062015 (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 10620). SPIE. https://doi.org/10.1117/12.2288676

Pang, Zongguang ; Kong, Lingqin ; Zhao, Yuejin et al. / Accurate measurement of imaging photoplethysmographic signals based camera using weighted average. 2017 International Conference on Optical Instruments and Technology: Optoelectronic Imaging/Spectroscopy and Signal Processing Technology. editor / Guohai Situ ; Wolfgang Osten ; Xun Cao. SPIE, 2018. (Proceedings of SPIE - The International Society for Optical Engineering).

@inproceedings{e64e616992cc4252aa0104c7e4176d8b,

title = "Accurate measurement of imaging photoplethysmographic signals based camera using weighted average",

abstract = "Imaging photoplethysmography (IPPG) is an emerging technique for the extraction of vital signs of human being using video recordings. IPPG technology with its advantages, non-contact measurement, low cost and easy operation has become one research hot spot in the field of biomedicine. However, the noise disturbance cannot be removed because of the uneven distribution of micro-Arterial, incident light intensity of different regions, which results in a low signal noise ratio(SNK) of IPPG signals and low accuracy of heart rate. In this paper, we propose a method of improving the SNK of camera-based IPPG signals using weighted average. Firstly, we obtain the region of interest (ROI) of a subject's face by camera. Secondly, selected region is divided into 60 × 60 pixel block. Thirdly, the weight of PPG signal of each sub-region is calculated based on the signal-To-noise ratio of each sub-region. Finally, we combine the IPPG signal from all sub-regions using weighted average. Compared with method of mean of the whole region, this method can improve the SNK of IPPG signal to a certain extent. The heart rate deviation is within 3 beats, compared with traditional figure blood volume pulse senor.",

keywords = "Imaging photoplethysmography, Non-contact measurement, Region of interest, Weighted average",

author = "Zongguang Pang and Lingqin Kong and Yuejin Zhao and Huijuan Sun and Liquan Dong and Mei Hui and Ming Liu and Xiaohua Liu and Lingling Liu and Xiaohui Li and Rongji Li",

note = "Publisher Copyright: {\textcopyright} 2018 SPIE.; 2017 International Conference on Optical Instruments and Technology: Optoelectronic Imaging/Spectroscopy and Signal Processing Technology, OIT 2017 ; Conference date: 28-10-2017 Through 30-10-2017",

year = "2018",

doi = "10.1117/12.2288676",

language = "English",

series = "Proceedings of SPIE - The International Society for Optical Engineering",

publisher = "SPIE",

editor = "Guohai Situ and Wolfgang Osten and Xun Cao",

booktitle = "2017 International Conference on Optical Instruments and Technology",

address = "United States",

}

Pang, Z, Kong, L, Zhao, Y, Sun, H, Dong, L, Hui, M, Liu, M, Liu, X, Liu, L, Li, X & Li, R 2018, Accurate measurement of imaging photoplethysmographic signals based camera using weighted average. in G Situ, W Osten & X Cao (eds), 2017 International Conference on Optical Instruments and Technology: Optoelectronic Imaging/Spectroscopy and Signal Processing Technology., 1062015, Proceedings of SPIE - The International Society for Optical Engineering, vol. 10620, SPIE, 2017 International Conference on Optical Instruments and Technology: Optoelectronic Imaging/Spectroscopy and Signal Processing Technology, OIT 2017, Beijing, China, 28/10/17. https://doi.org/10.1117/12.2288676

Accurate measurement of imaging photoplethysmographic signals based camera using weighted average. / Pang, Zongguang; Kong, Lingqin; Zhao, Yuejin et al.
2017 International Conference on Optical Instruments and Technology: Optoelectronic Imaging/Spectroscopy and Signal Processing Technology. ed. / Guohai Situ; Wolfgang Osten; Xun Cao. SPIE, 2018. 1062015 (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 10620).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

TY - GEN

T1 - Accurate measurement of imaging photoplethysmographic signals based camera using weighted average

AU - Pang, Zongguang

AU - Kong, Lingqin

AU - Zhao, Yuejin

AU - Sun, Huijuan

AU - Dong, Liquan

AU - Hui, Mei

AU - Liu, Ming

AU - Liu, Xiaohua

AU - Liu, Lingling

AU - Li, Xiaohui

AU - Li, Rongji

PY - 2018

Y1 - 2018

N2 - Imaging photoplethysmography (IPPG) is an emerging technique for the extraction of vital signs of human being using video recordings. IPPG technology with its advantages, non-contact measurement, low cost and easy operation has become one research hot spot in the field of biomedicine. However, the noise disturbance cannot be removed because of the uneven distribution of micro-Arterial, incident light intensity of different regions, which results in a low signal noise ratio(SNK) of IPPG signals and low accuracy of heart rate. In this paper, we propose a method of improving the SNK of camera-based IPPG signals using weighted average. Firstly, we obtain the region of interest (ROI) of a subject's face by camera. Secondly, selected region is divided into 60 × 60 pixel block. Thirdly, the weight of PPG signal of each sub-region is calculated based on the signal-To-noise ratio of each sub-region. Finally, we combine the IPPG signal from all sub-regions using weighted average. Compared with method of mean of the whole region, this method can improve the SNK of IPPG signal to a certain extent. The heart rate deviation is within 3 beats, compared with traditional figure blood volume pulse senor.

AB - Imaging photoplethysmography (IPPG) is an emerging technique for the extraction of vital signs of human being using video recordings. IPPG technology with its advantages, non-contact measurement, low cost and easy operation has become one research hot spot in the field of biomedicine. However, the noise disturbance cannot be removed because of the uneven distribution of micro-Arterial, incident light intensity of different regions, which results in a low signal noise ratio(SNK) of IPPG signals and low accuracy of heart rate. In this paper, we propose a method of improving the SNK of camera-based IPPG signals using weighted average. Firstly, we obtain the region of interest (ROI) of a subject's face by camera. Secondly, selected region is divided into 60 × 60 pixel block. Thirdly, the weight of PPG signal of each sub-region is calculated based on the signal-To-noise ratio of each sub-region. Finally, we combine the IPPG signal from all sub-regions using weighted average. Compared with method of mean of the whole region, this method can improve the SNK of IPPG signal to a certain extent. The heart rate deviation is within 3 beats, compared with traditional figure blood volume pulse senor.

KW - Imaging photoplethysmography

KW - Non-contact measurement

KW - Region of interest

KW - Weighted average

UR - http://www.scopus.com/inward/record.url?scp=85040982141&partnerID=8YFLogxK

U2 - 10.1117/12.2288676

DO - 10.1117/12.2288676

M3 - Conference contribution

AN - SCOPUS:85040982141

T3 - Proceedings of SPIE - The International Society for Optical Engineering

BT - 2017 International Conference on Optical Instruments and Technology

A2 - Situ, Guohai

A2 - Osten, Wolfgang

A2 - Cao, Xun

PB - SPIE

T2 - 2017 International Conference on Optical Instruments and Technology: Optoelectronic Imaging/Spectroscopy and Signal Processing Technology, OIT 2017

Y2 - 28 October 2017 through 30 October 2017

ER -

Pang Z, Kong L, Zhao Y, Sun H, Dong L, Hui M et al. Accurate measurement of imaging photoplethysmographic signals based camera using weighted average. In Situ G, Osten W, Cao X, editors, 2017 International Conference on Optical Instruments and Technology: Optoelectronic Imaging/Spectroscopy and Signal Processing Technology. SPIE. 2018. 1062015. (Proceedings of SPIE - The International Society for Optical Engineering). doi: 10.1117/12.2288676

Accurate measurement of imaging photoplethysmographic signals based camera using weighted average

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