AI RESEARCH
BTS-rPPG: Orthogonal Butterfly Temporal Shifting for Remote Photoplethysmography
arXiv CS.CV
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ArXi:2604.01679v1 Announce Type: new Remote photoplethysmography (rPPG) enables contactless physiological sensing from facial videos by analyzing subtle appearance variations induced by blood circulation. However, modeling the temporal dynamics of these signals remains challenging, as many deep learning methods rely on temporal shifting or convolutional operators that aggregate information primarily from neighboring frames, resulting in predominantly local temporal modeling and limited temporal receptive fields.