@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",
}