Results 31 to 40 of about 7,588 (202)
Applied Sciences, 2020 Imaging photoplethysmography (iPPG) is a contact-free monitoring of the cutaneous blood volume pulse by RGB (red-green-blue) cameras. It detects vital parameters from skin areas and is associated to cutaneous perfusion. This study investigated the use of
Imre Kukel +6 more
doaj +1 more source
Fair non-contact blood pressure estimation using imaging photoplethysmography. [PDF]
Biomed Opt ExpressHypertension is typically manifested as a latent symptom that requires detection through specialized equipment. This poses an inconvenience for individuals who need to undergo long-term blood pressure monitoring in their daily lives. Therefore, there is a need for a portable, non-contact method for estimating blood pressure.
Fang H, Xiong J, He L.
europepmc +3 more sources
Imaging PPG for In Vivo Human Tissue Perfusion Assessment during Surgery
Journal of Imaging, 2022 Surgical excision is the golden standard for treatment of intestinal tumors. In this surgical procedure, inadequate perfusion of the anastomosis can lead to postoperative complications, such as anastomotic leakages.
Marco Lai +6 more
doaj +1 more source
A Comparative Evaluation of Heart Rate Estimation Methods using Face Videos [PDF]
, 2020 This paper presents a comparative evaluation of methods for remote heart rate estimation using face videos, i.e., given a video sequence of the face as input, methods to process it to obtain a robust estimation of the subjects heart rate at each moment ...
Diaz, David +3 more
core +1 more source
Fatigue Driving Detection Method Based on IPPG Technology
Promet (Zagreb), 2023 Physiological signal index can accurately reflect the degree of fatigue, but the contact detection method will greatly affect the driver's driving. This paper presents a non-contact method for detecting tired driving. It uses cameras and other devices to
Jiuju Bi +3 more
doaj +1 more source
On the Vector Space in Photoplethysmography Imaging [PDF]
2019 IEEE/CVF International Conference on Computer Vision Workshop (ICCVW), 2019 We study the vector space of visible wavelength intensities from face videos widely used as input features in Photoplethysmography Imaging (PPGI). Based upon theoretical principles of group invariance in the Euclidean space, we derive a change of the topology where the corresponding distance between successive measurements is defined as geodesic on a ...
Pilz, Christian S. +2 more
openaire +3 more sources
Intraoperative Imaging of Cortical Blood Flow by Camera-Based Photoplethysmography at Green Light
Applied Sciences, 2020 Intraoperative evaluation of blood perfusion in the brain cortex is an important but hitherto unresolved problem. Our aim was to demonstrate the feasibility of cerebral microcirculation assessment during open brain surgery by using camera-based ...
Oleg V. Mamontov +3 more
doaj +1 more source
Holographic laser Doppler imaging of pulsatile blood flow [PDF]
, 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
Accurate measurement of the pulse wave delay with imaging photoplethysmography. [PDF]
Biomed Opt Express, 2016 Assessment of the cardiovascular parameters using noncontact video-based or imaging photoplethysmography (IPPG) is usually considered as inaccurate because of strong influence of motion artefacts. To optimize this technique we performed a simultaneous recording of electrocardiogram and video frames of the face for 36 healthy volunteers.
Kamshilin AA +5 more
europepmc +5 more sources
Non-Contact, Simple Neonatal Monitoring by Photoplethysmography
Sensors, 2018 This paper presents non-contact vital sign monitoring in neonates, based on image processing, where a standard color camera captures the plethysmographic signal and the heart and breathing rates are processed and estimated online.
Juan-Carlos Cobos-Torres +2 more
doaj +1 more source