Over the last few years, the contactless acquisition of cardiovascular parameters using
cameras has gained immense attention. The technique provides an optical means to …

Flap loss through limited perfusion remains a major complication in reconstructive surgery.
Continuous monitoring of perfusion will facilitate early detection of insufficient perfusion …

The development of non-contact techniques for monitoring human vital signs has significant
potential to improve patient care in diverse settings. By facilitating easier and more …

Blood pressure (BP) is among the most important vital signals. Estimation of absolute BP
solely using photoplethysmography (PPG) has gained immense attention over the last …

Perfusion index (PI), the ratio between variable pulsatile (AC) and non-pulsatile (DC)
components in a photoplethysmographic (PPG) signal, is an indirect and non-invasive …

Objective. After skin flap transplants, perfusion strength monitoring is essential for the early
detection of tissue perfusion disorders and thus to ensure the survival of skin flaps. Camera …

This paper presents an approach for pulse rate extraction from videos. The core of the
presented approach is a novel method to segment and track a suitable region of interest …

Background Only a small fraction of the information available is generally used in the
majority of camera-based sensing approaches for vital sign monitoring. Dedicated skin …

Mental stress triggers positive inotropic and chronotropic effects as well as peripheral
vasoconstriction. This alters the pulse arrival time (PAT), the duration between electrical …

This paper presents a method to analyze and visualize the local blood flow through human
skin tissue within the face and neck. The method is based on the local signal characteristics …