11 papers
Rhythm-Structured Predictive Learning for Remote Photoplethysmography
Ba-Thinh Nguyen, Huu-Dung Nguyen, Thi-Duyen Ngo +1
Remote photoplethysmography (rPPG) estimates physiological signals from facial videos by analyzing subtle pulse induced skin color variations. Despite recent progress, existing sel…
Apex-Centered Spatio-Temporal Rank Pooling and Gradient Attention for Micro-Expression Recognition
Luu Tu Nguyen, Vu Tram Anh Khuong, Thanh Ha Le +1
Micro-expression recognition (MER) is a challenging task due to the subtle and fleeting nature of micro-expressions. Traditional input modalities, such as Apex Frame, Optical Flow,…
BTS-rPPG: Orthogonal Butterfly Temporal Shifting for Remote Photoplethysmography
Ba-Thinh Nguyen, Thi-Duyen Ngo, Thanh-Trung Huynh +2
Remote photoplethysmography (rPPG) enables contactless physiological sensing from facial videos by analyzing subtle appearance variations induced by blood circulation. However, mod…
HOT: Harmonic-Constrained Optimal Transport for Remote Photoplethysmography Domain Adaptation
Ba-Thinh Nguyen, Thi-Duyen Ngo, Thanh-Trung Huynh +2
Remote photoplethysmography (rPPG) enables non-contact physiological measurement from facial videos; however, its practical deployment is often hindered by substantial performance…
Dual-View Optical Flow for 4D Micro-Expression Recognition - A Multi-Stream Fusion Attention Approach
Luu Tu Nguyen, Thi Bich Phuong Man, Vu Tram Anh Khuong +2
Micro-expression recognition is vital for affective computing but remains challenging due to the extremely brief, low-intensity facial motions involved and the high-dimensional nat…
Reperio-rPPG: Relational Temporal Graph Neural Networks for Periodicity Learning in Remote Physiological Measurement
Ba-Thinh Nguyen, Thach-Ha Ngoc Pham, Hoang-Long Duc Nguyen +2
Remote photoplethysmography (rPPG) is an emerging contactless physiological sensing technique that leverages subtle color variations in facial videos to estimate vital signs such a…