Results 51 to 60 of about 275,664 (215)

Deep Learning Methods for Remote Heart Rate Measurement: A Review and Future Research Agenda

open access: yesSensors, 2021
Heart rate (HR) is one of the essential vital signs used to indicate the physiological health of the human body. While traditional HR monitors usually require contact with skin, remote photoplethysmography (rPPG) enables contactless HR monitoring by ...
Chun-Hong Cheng   +4 more
doaj   +1 more source

Estimating Blood Pressure from Photoplethysmogram Signal and Demographic Features using Machine Learning Techniques

open access: yes, 2020
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 BP measurements
Chowdhury, Moajjem Hossain   +6 more
core   +1 more source

Holographic laser Doppler imaging of pulsatile blood flow [PDF]

open access: yes, 2015
We report on wide-field imaging of pulsatile motion induced by blood flow using heterodyne holographic interferometry on the thumb of a healthy volunteer, in real-time.
Atlan, Michael   +4 more
core   +5 more sources

DistancePPG: Robust non-contact vital signs monitoring using a camera

open access: yes, 2015
Vital signs such as pulse rate and breathing rate are currently measured using contact probes. But, non-contact methods for measuring vital signs are desirable both in hospital settings (e.g. in NICU) and for ubiquitous in-situ health tracking (e.g.
Kumar, Mayank   +2 more
core   +1 more source

Motion limitations of non-contact photoplethysmography due to the optical and topological properties of skin [PDF]

open access: yes, 2016
Non-contact photoplethysmography (PPG) provides multiple benefits over in-contact methods, but is not as tolerant to motion due to the lack of mechanical coupling between the subject and sensor.
Alametsä J   +10 more
core   +3 more sources

Relation between pulse pressure and the pulsation strength in camera-based photoplethysmograms

open access: yesCurrent Directions in Biomedical Engineering, 2017
Camera-based photoplethysmography (cbPPG) is an innovative measuring technique that enables the remote extraction of vital signs using video cameras. Most studies in the field focus on heart rate detection while other physiological quantities are often ...
Trumpp Alexander   +6 more
doaj   +1 more source

Contact Surface Area: A Novel Signal for Heart Rate Estimation in Smartphone Videos

open access: yes, 2019
We consider the problem of smartphone video-based heart rate estimation, which typically relies on measuring the green color intensity of the user's skin.
Fridovich-Keil, Sara, Ramadge, Peter J.
core   +1 more source

A machine vision approach to human activity recognition using photoplethysmograph sensor data [PDF]

open access: yes, 2018
Human activity recognition (HAR) is an active area of research concerned with the classification of human motion. Cameras are the gold standard used in this area, but they are proven to have scalability and privacy issues.
Brophy, Eoin   +3 more
core   +1 more source

Evaluation of biases in remote photoplethysmography methods

open access: yesnpj Digital Medicine, 2021
This work investigates the estimation biases of remote photoplethysmography (rPPG) methods for pulse rate measurement across diverse demographics.
Ananyananda Dasari   +3 more
doaj   +1 more source

Video pulse rate variability analysis in stationary and motion conditions [PDF]

open access: yes, 2018
Background: In the last few years, some studies have measured heart rate (HR) or heart rate variability (HRV) parameters using a video camera. This technique focuses on the measurement of the small changes in skin colour caused by blood perfusion.
Melchor Rodríguez, Angel   +1 more
core   +3 more sources

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