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.
Preserving shape details of pulse signals for video-based blood pressure estimation,
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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.