Results 41 to 50 of about 1,744,925 (114)

A Literature Survey on Potential Private User Information Leakage in Metaverse Applications

Advanced Intelligent Systems, Volume 8, Issue 1, January 2026.
This survey explores potential privacy risks in the Metaverse, focusing on personal data inferred from virtual reality headsets embedded with passive brain‐computer interfaces (BCI). It reviews how age, gender, and ethnicity can be predicted using neurophysiological signals, (e.g., electroencephalogram). The survey also explores future threats from non‐
Mina Jaberi, Tiago H. Falk
wiley   +1 more source

Advancements in Emotion Classification via Facial and Body Gesture Analysis: A Survey

Expert Systems, Volume 42, Issue 2, February 2025.
ABSTRACT Machine vision has had a substantial impact on human‐computer interaction and psychological research. The ability of robots to generate realistic facial expressions has been enhanced by advancements in artificial intelligence, neural networks, and deep learning, thereby nurturing more profound emotive connections between humans and machines ...
Anjali Diwan, Reshma Sunil, Parita Mer, Rajesh Mahadeva, Shashikant P. Patole   +4 more
wiley   +1 more source

Time-Series U-Net With Recurrence for Noise-Robust Imaging Photoplethysmography

IEEE Access
Remote estimation of vital signs enables health monitoring for situations in which contact-based devices are either not available, too intrusive, or too expensive. In this paper, we present a modular pipeline for pulse signal estimation from video of the
Vineet R. Shenoy, Shaoju Wu, Armand Comas, Suhas Lohit, Hassan Mansour, Tim K. Marks   +5 more
doaj   +1 more source

Origin of Infrared Light Modulation in Reflectance-Mode Photoplethysmography. [PDF]

PLoS ONE, 2016
We recently pointed out the important role of dermis deformation by pulsating arterial pressure in the formation of a photoplethysmographic signal at green light.
Igor S Sidorov, Roman V Romashko, Vasily T Koval, Rashid Giniatullin, Alexei A Kamshilin   +4 more
doaj   +1 more source

First noncontact millimeter‐wave radar measurement of heart rate in great apes: Validation in chimpanzees (Pan troglodytes)

American Journal of Primatology, Volume 86, Issue 8, August 2024.
We observed a remarkable correspondence between the peak frequency spectrum of heart rate estimated using millimeter‐wave radar and the mean value obtained from electrocardiograph data, thereby validating the accuracy of the method. Abstract Heart rate is a crucial vital sign and a valuable indicator for assessing the physical and psychological ...
Takuya Matsumoto, Itsuki Iwata, Takuya Sakamoto, Satoshi Hirata   +3 more
wiley   +1 more source

Enhancing Fiducial Point Detection in Imaging Photoplethysmography Through Spatial Fusion

Current Directions in Biomedical Engineering
Imaging photoplethysmography (iPPG) enables contactless assessment of blood volume changes but is susceptible to noise, particularly under impaired perfusion.
Tauber Samuel, Wiede Christian, Wichum Felix, Seidl Karsten   +3 more
doaj   +1 more source

Imaging Photoplethysmography: Signal Waveform Analysis

, 2019
International audienceImaging photoplethysmography (iPPG) is used to remotely measure the blood volume pulse using a camera. Traditionally, it has been employed to estimate heart and respiratory rates, and recently blood pressure and oxygen saturation ...
Frederic Bousefsaf, Fethi Bereksi-Reguig, Bousefsaf, Frédéric, Djamaleddine Djeldjli, Djeldjli, Djamaleddine, Bereksi-Reguig, Fethi, Maaoui, Choubeila, Choubeila Maaoui   +7 more
core   +1 more source

Hybrid Optical Unobtrusive Blood Pressure Measurements

Sensors, 2017
Blood pressure (BP) is critical in diagnosing certain cardiovascular diseases such as hypertension. Some previous studies have proved that BP can be estimated by pulse transit time (PTT) calculated by a pair of photoplethysmography (PPG) signals at two ...
Guangfei Zhang, Caifeng Shan, Ihor Kirenko, Xi Long, Ronald M. Aarts   +4 more
doaj   +1 more source

Revealing of imaging photoplethysmography changes in cerebral blood supply caused by temporary arterial occlusion

Journal of Innovative Optical Health Sciences
During temporary arterial occlusion (TAO), which is often used in neurosurgery, particularly when clipping aneurysms, it is critically important to intraoperatively assess changes in blood supply to the brain.
Alexey Y. Sokolov, Valeriy V. Zaytsev, Anton V. Shcherbinin, Alexei A. Kamshilin   +3 more
doaj   +1 more source

Robust Method for Non-Contact Vital Sign Measurement in Videos Acquired in Real-World Light Settings From Skin Less Affected by Blood Perfusion

IEEE Access
Color fluctuations caused by blood perfusion on the skin are an essential tool for the success of imaging photoplethysmography (iPPG) methods. However, color fluctuation of the non-facial skin is less observable than that of the facial skin. Furthermore,
Nattapong Tangjui, Pinyo Taeprasartsit
doaj   +1 more source