Results 51 to 60 of about 1,744,925 (114)
Pilot evaluation of multimodal optical pulse signals for lipid-related analysis
ArrayOptical pulse waveforms contain information related to vascular and cardiometabolic state, but favorable joint model performance does not establish an independent optical biomarker contribution.
Suchin Trirongjitmoah +4 more
doaj +1 more source
Applied Sciences, 2019 Techniques for noncontact measurement of vital signs using camera imaging technologies have been attracting increasing attention. For noncontact physiological assessments, computer vision-based methods appear to be an advantageous approach that could be ...
Fatema-Tuz-Zohra Khanam +2 more
doaj +1 more source
Detecting stress from imaging photoplethysmography using high frame rate video and a yellow-green filter: A pilot study [PDF]
, 2020 We investigate the use of a yellow-green filter to increase the signal-to-noise ratio (snr) in imaging photoplethysmography (iPPG) and test if high frame rate (HFR) video improves the accuracy of the derived heart rate variability (HRV). This pilot study
Aquilina, Peter Vincent +5 more
core +1 more source
IEEE Journal of Translational Engineering in Health and Medicine, 2017 Most existing non-contact monitoring systems are limited to detecting physiological signs from a single subject at a time. Still, another challenge facing these systems is that they are prone to noise artifacts resulting from motion of subjects, facial ...
Ali Al-Naji, Javaan Chahl
doaj +1 more source
IEEE Access, 2018 Most existing imaging technologies are prone to noise artifact resulting from movement of subjects, movement of the camera, facial expressions, talking, skin tone, and lighting variations.
Ali Al-Naji, Javaan Chahl
doaj +1 more source
Comparative study on the effect of color spaces and color formats on heart rate measurement using the imaging photoplethysmography (IPPG) method. [PDF]
Technol Health Care, 2022 Zhang C, Tian J, Li D, Hou X, Wang L.
europepmc +1 more source
A Study of the Dynamic Relation between Physiological Changes and Spontaneous Expressions
Scientific Reports, 2017 Recent progress in Affective Computing (AC) has enabled integration of physiological cues and spontaneous expressions to reveal a subject’s emotional state.
Fenglei Yang +6 more
doaj +1 more source
Video pulse rate variability analysis in stationary and motion conditions
BioMedical Engineering OnLine, 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. To date,
Angel Melchor RodrÃguez +1 more
doaj +1 more source
Simulating cardiac signals on 3D human models for photoplethysmography development
Frontiers in Robotics and AIIntroduction: Image-based heart rate estimation technology offers a contactless approach to healthcare monitoring that could improve the lives of millions of people.
Danyi Wang, Javaan Chahl, Javaan Chahl
doaj +1 more source
Real-Time Respiratory Rate Estimation using Imaging Photoplethysmography Inter-Beat Intervals [PDF]
Imaging photoplethysmography (iPPG) has emerged as a contactless heart-rate monitoring technique. As the respiratory activity modulates the heart rate, we investigate the accuracy of iPPG in conveying the inter-beat variation due to the respiratory ...
Fallet, Sibylle +4 more
core +1 more source