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Hypertension is a potentially unsafe health ailment, which can be indicated directly from the Blood pressure (BP). Hypertension always leads to other health complications. Continuous monitoring of BP is very important; however, cuff-based…

Heart rate variability (HRV) is a practical and noninvasive measure of autonomic nervous system activity, which plays an essential role in cardiovascular health. However, using HRV to assess physiology status is challenging. Even in…

Signal Processing · Electrical Eng. & Systems 2022-03-24 Jiacheng Zhu , Gregory Darnell , Agni Kumar , Ding Zhao , Bo Li , Xuanlong Nguyen , Shirley You Ren

Purpose: Different Magnetic resonance imaging (MRI) modalities of the same anatomical structure are required to present different pathological information from the physical level for diagnostic needs. However, it is often difficult to…

Image and Video Processing · Electrical Eng. & Systems 2021-09-15 Yuchen Fei , Bo Zhan , Mei Hong , Xi Wu , Jiliu Zhou , Yan Wang

Physiological activities can be manifested by the sensitive changes in facial imaging. While they are barely observable to our eyes, computer vision manners can, and the derived remote photoplethysmography (rPPG) has shown considerable…

Computer Vision and Pattern Recognition · Computer Science 2025-03-17 Hang Shao , Lei Luo , Jianjun Qian , Mengkai Yan , Shuo Chen , Jian Yang

Photoplethysmography (PPG) is one of the most widely captured biosignals for clinical prediction tasks, yet PPG-based algorithms are typically trained on small-scale datasets of uncertain quality, which hinders meaningful algorithm…

Machine Learning · Computer Science 2026-03-24 Mohammad Moulaeifard , Philip J. Aston , Peter H. Charlton , Nils Strodthoff

Reflective photoplethysmography (PPG) has become the default sensing technique in wearable devices to monitor cardiac activity via a person's heart rate (HR). However, PPG-based HR estimates can be substantially impacted by factors such as…

Computer Vision and Pattern Recognition · Computer Science 2024-12-24 Manuel Meier , Berken Utku Demirel , Christian Holz

Photoplethysmographic imaging is a camera-based solution for non-contact cardiovascular monitoring from a distance. This technology enables monitoring in situations where contact-based devices may be problematic or infeasible, such as…

Computer Vision and Pattern Recognition · Computer Science 2016-06-30 Robert Amelard , David A Clausi , Alexander Wong

Remote camera measurement of the blood volume pulse via photoplethysmography (rPPG) is a compelling technology for scalable, low-cost, and accessible assessment of cardiovascular information. Neural networks currently provide the…

Image and Video Processing · Electrical Eng. & Systems 2024-03-19 Björn Braun , Daniel McDuff , Christian Holz

Event cameras, also known as neuromorphic cameras, are an emerging technology that offer advantages over traditional shutter and frame-based cameras, including high temporal resolution, low power consumption, and selective data acquisition.…

Image and Video Processing · Electrical Eng. & Systems 2023-09-22 Aniket Jagtap , RamaKrishna Venkatesh Saripalli , Joe Lemley , Waseem Shariff , Alan F. Smeaton

Objective: Non-contact physiological measurement is a growing research area that allows capturing vital signs such as heart rate (HR) and breathing rate (BR) comfortably and unobtrusively with remote devices. However, most of the approaches…

Computer Vision and Pattern Recognition · Computer Science 2018-11-21 Weixuan Chen , Javier Hernandez , Rosalind W. Picard

There are large individual differences in physiological processes, making designing personalized health sensing algorithms challenging. Existing machine learning systems struggle to generalize well to unseen subjects or contexts and can…

Computer Vision and Pattern Recognition · Computer Science 2021-03-09 Xin Liu , Ziheng Jiang , Josh Fromm , Xuhai Xu , Shwetak Patel , Daniel McDuff

The cross-sensor gap is one of the challenges that have aroused much research interests in Heterogeneous Face Recognition (HFR). Although recent methods have attempted to fill the gap with deep generative networks, most of them suffer from…

Computer Vision and Pattern Recognition · Computer Science 2020-04-01 Boyan Duan , Chaoyou Fu , Yi Li , Xingguang Song , Ran He

Photoplethysmography (PPG) signals have become a key technology in many fields, such as medicine, well-being, or sports. Our work proposes a set of pipelines to extract remote PPG signals (rPPG) from the face robustly, reliably, and…

Computer Vision and Pattern Recognition · Computer Science 2023-05-08 Constantino Álvarez Casado , Miguel Bordallo López

Remote photoplethysmography (rPPG) aims to extract non-contact physiological signals from facial videos and has shown great potential. However, existing rPPG approaches struggle to bridge the gap between source and target domains. Recent…

Quantitative Methods · Quantitative Biology 2025-10-03 Shuyang Chu , Jingang Shi , Xu Cheng , Haoyu Chen , Xin Liu , Jian Xu , Guoying Zhao

Reinforcement Learning (RL) environments can produce training data with spurious correlations between features due to the amount of training data or its limited feature coverage. This can lead to RL agents encoding these misleading…

Machine Learning · Computer Science 2023-10-13 Mhairi Dunion , Trevor McInroe , Kevin Sebastian Luck , Josiah P. Hanna , Stefano V. Albrecht

In order to obtain insights into the feasibility of replacing ECG-guided triggering in magnetic resonance imaging (MRI) by a system based on video photoplethysmography (PPG), PPG and ECG data were collected from volunteers in an MRI…

Signal Processing · Electrical Eng. & Systems 2023-06-19 A. C. den Brinker , H. H. Der Sarkissian , J. H. Wülbern , B. Balmaekers , M. Padalko , J. Sénégas , R. Springorum , C. Possanzini

Camera-based vital signs monitoring in recent years has attracted more and more researchers and the results are promising. However, a few research works focus on heart rate extraction under extremely low illumination environments. In this…

Image and Video Processing · Electrical Eng. & Systems 2025-03-07 Lin Xi , Xingming Wu , Weihai Chen , Jianhua Wang , Changchen Zhao

Extracting the instantaneous heart rate (iHR) from face videos has been well studied in recent years. It is well known that changes in skin color due to blood flow can be captured using conventional cameras. One of the main limitations of…

Computer Vision and Pattern Recognition · Computer Science 2019-02-15 Natalia Martinez , Martin Bertran , Guillermo Sapiro , Hau-Tieng Wu

Goal: A new method for heart rate monitoring using photoplethysmography (PPG) during physical activities is proposed. Methods: It jointly estimates spectra of PPG signals and simultaneous acceleration signals, utilizing the multiple…

Other Computer Science · Computer Science 2015-07-22 Zhilin Zhang

Remote photoplethysmography (rPPG) is an attractive method for noninvasive, convenient and concomitant measurement of physiological vital signals. Public benchmark datasets have served a valuable role in the development of this technology…

Computer Vision and Pattern Recognition · Computer Science 2023-05-02 Jiankai Tang , Kequan Chen , Yuntao Wang , Yuanchun Shi , Shwetak Patel , Daniel McDuff , Xin Liu