Results 11 to 20 of about 275,664 (215)

Automatic Detection of Acute Mental Stress with Camera-based Photoplethysmography

Computing in Cardiology Conference (CinC), 2023
Autonomic nervous system (ANS) activity reflects in vital signs that can be measured by means of camera-based photoplethysmography (cbPPG). This work investigates the automatic detection of acute mental stress with cbPPG. Data from the Dresden Multimodal
Hannes Ernst, Hagen Malberg, Martin Schmidt   +2 more
semanticscholar   +3 more sources

Non-contact Measurement of Respiration Rate With Camera-based Photoplethysmography During Rest and Mental Stress

Computing in Cardiology Conference (CinC), 2022
Cameras offer new possibilities in assessing human states like stress. This work addresses the measurement of respiration rate with several approaches.
Hannes Ernst, Hagen Malberg, Martin Schmidt   +2 more
semanticscholar   +3 more sources

Camera-based photoplethysmography in critical care patients [PDF]

Clinical Hemorheology and Microcirculation, 2016
BACKGROUND: Camera-based photoplethysmography (cbPPG) is an optical measurement technique that reveals pulsatile blood flow in cutaneous microcirculation from a distance. cbPPG has been shown to reflect pivotal haemodynamic events like cardiac ejection in healthy subjects.
Stefan Rasche, Alexander Trumpp, Thomas Waldow, Frederik Gaetjen, Katrin Plötze, Daniel Wedekind, Martin Schmidt, Hagen Malberg, Klaus Matschke, Sebastian Zaunseder   +9 more
semanticscholar   +4 more sources

Camera-based remote photoplethysmography for blood pressure measurement: current evidence, clinical perspectives, and future applications

Connected Health And Telemedicine, 2023
Telehealth has seen rapid adoption in the past three years as a direct result of the COVID-19 pandemic. Conventional methods for measurement of vital signs are neither optimized for remote care nor highly scalable.
Theodore Curran, Daniel McDuff, Xin Liu, Girish Narayanswamy, Chengqian Ma, Shwetak Patel, Eugene Yang   +6 more
semanticscholar   +4 more sources

Graph connection Laplacian allows for enhanced outcomes of consumer camera based photoplethysmography imaging [PDF]

Biomedical Signal Processing and Control
Object: This work aims to introduce a novel method to mitigate the global phase deviation inherent in photoplethysmography imaging (PPGI) due to hemodynamics. Method: We model the facial vascular network captured by a consumer camera as a two-dimensional
Štefan Borik, Hau‐Tieng Wu, Kirk H. Shelley, Aymen Alian   +3 more
semanticscholar   +4 more sources

Automated identification of cardiac signals after blind source separation for camera-based photoplethysmography [PDF]

2015 IEEE 35th International Conference on Electronics and Nanotechnology (ELNANO), 2015
In the field of camera-based photoplethysmography the application of blind source separation (BSS) techniques has extensively stressed to cope with frequently occurring artifacts and noise. Although said techniques can help to extract the cardiac component from a mixture of input sources, permutation indeterminacy inherit to BSS techniques often ...
Daniel Wedekind, Hagen Malberg, Sebastian Zaunseder, Frederik Gaetjen, Klaus Matschke, Stefan Rasche   +5 more
semanticscholar   +3 more sources

Improved heart rate detection for camera-based photoplethysmography by means of Kalman filtering

2015 IEEE 35th International Conference on Electronics and Nanotechnology (ELNANO), 2015
Camera-based photoplethysmography (cbPPG) is a recent development in biomedical engineering, which is primarily used to the contactless assessment of subject's heart rate. cbPPG's easy acquisition scheme comes at cost of an usually low signal-to-noise ratio.
Fernando Andreotti, Alexander Trumpp, Hagen Malberg, Sebastian Zaunseder   +3 more
semanticscholar   +3 more sources

Skin Detection and Tracking for Camera-Based Photoplethysmography Using a Bayesian Classifier and Level Set Segmentation

Bildverarbeitung für die Medizin, 2017
Camera-Based Photoplethysmography is a measuring technique that permits the remote assessment of vital signs by using cameras. The face is the preferred area of measurement (region of interest: ROI) that has to be selected automatically for convenient application. Most works use common face detection algorithm for this purpose.
Alexander Trumpp, Stefan Rasche, Daniel Wedekind, Martin Schmidt, Thomas Waldow, Frederik Gaetjen, Katrin Plötze, Hagen Malberg, Klaus Matschke, Sebastian Zaunseder   +9 more
semanticscholar   +3 more sources

CAMERA-BASED REMOTE PHOTOPLETHYSMOGRAPHY TO MEASURE HEART RATE AND BLOOD PRESSURE IN AMBULATORY PATIENTS WITH CARDIOVASCULAR DISEASE: PRELIMINARY ANALYSIS

Journal of the American College of Cardiology, 2023
Theodore Curran, Xin Liu, Daniel McDuff, Shwetak Patel, Eugene Yang   +4 more
semanticscholar   +3 more sources

Facial video photoplethysmography for measuring average and quasi-instantaneous heart rate: a pilot validation study [PDF]

Frontiers in Physiology
BackgroundVideo photoplethysmography (vPPG) is a contactless optical technique for recording blood pulsations in the blood vessels of the skin using a digital camera that is increasingly used to measure or estimate various physiological parameters.
Leszek Pstras, Tymoteusz Okupnik, Beata Ponikowska, Bartlomiej Paleczny   +3 more
doaj   +2 more sources