The wide diffusion of wearable sensors and mobile devices encouraged the study of
biometric recognition techniques that require a low level of cooperation from users. Among …

Heart rate (HR) estimation is an essential physiological parameter in the field of biomedical
imaging. Remote Photoplethysmography (r-PPG) is a pathbreaking development in this field …

Heart rate (HR) is a crucial physiological indicator of human health and can be used to
detect cardiovascular disorders. The traditional HR estimation methods, such as …

The challenges obscuring contactless heart rate (HR) measurement using an RGB camera
to emerge as a reliable alternative to the existing contact-based methods are the reliability …

Nowadays, the number of mobile, wearable, and embedded devices integrating sensors for
acquiring cardiac signals is constantly increasing. In particular, plethysmographic (PPG) …

Recent research has shown that a person's heart rate (HR) can be estimated using video
data through remote photoplethysmography (rPPG). However, this approach is faced with …

Camera-based remote photoplethysmography (remote-PPG) enables contactless
measurement of blood volume pulse from the human skin. Skin visibility is essential to …

Biometric authentication is currently one of the most attractive authentication methodologies,
as it is very user friendly and is the most secure option for consumer grade mobile device …

Biometric authentication has made great strides throughout the years thanks to better
hardware and software support. However, attackers are unrelenting in finding new ways to …

In this study, we propose a countermeasure against a presentation attack on a
photoplethysmogram (PPG)-based biometric authentication system. The countermeasure …