AI RESEARCH
Template Collapse and Information-Theoretic Limits in Camera rPPG Pulse Morphology Restoration
arXiv CS.CV
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ArXi:2606.03802v1 Announce Type: new Objective: Consumer face camera remote photoplethysmography (rPPG) enables passive cardiovascular monitoring, but whether single-cycle waveform morphology encoding arterial stiffness biomarkers is recoverable from this measurement has not been characterised. Methods: We evaluated 16 architectures spanning six families on 153 subjects across three datasets, Results: No architecture recovered subject-specific morphology (cross-subject r range 0.773--0.9999; ground-truth ceiling 0.601.