Empirical tests of 16 architectures on 153 subjects show camera rPPG signals contain no recoverable subject-specific pulse morphology, with all models exhibiting template collapse.
Feasibility of remote pulse transit time estimation using narrow-band multi-wavelength camera pho- toplethysmography,
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Template Collapse and Information-Theoretic Limits in Camera rPPG Pulse Morphology Restoration
Empirical tests of 16 architectures on 153 subjects show camera rPPG signals contain no recoverable subject-specific pulse morphology, with all models exhibiting template collapse.