ChatPPG.

Mithun Saha

University of Memphis, Memphis, Tennessee, USA
ORCID iD

Mithun Saha has 1 paper in the ChatPPG research atlas (2025), linked to 1 model, with work using 3 datasets and 5 co-authors in the atlas. Main topics: PPG, open-weights, field-data, wrist-PPG, domain-adaptation.

Papers

  • Pulse-PPG: An Open-Source Field-Trained PPG Foundation Model for Wearable Applications Across Lab and Field Settings
    2025 · Proceedings of the ACM on Interactive, Mob

    Pulse-PPG is an open-source PPG foundation model trained only on raw PPG from a 100-day field study with 120 participants. Earlier open PPG models were trained on clinical data, and field-trained ones were closed. Pulse-PPG generalized better than clinically trained models across clinical and mobile health tasks in both lab and field settings.

    • Published: Proceedings of the ACM IMWUT, 2025
    • Pretraining: raw field PPG, 100-day study
    • Cohort: 120 participants

Models

Datasets used in this work

  • MOODS: Mobile Open Observation of Daily Stressors (Fossil Sport WearOS watch, 100-day field study; private)
  • PPG-DaLiA: PPG dataset for motion compensation / HR
  • WESAD: Wearable Stress and Affect Detection

Co-authors

James M. RehgMaxwell A. XuSameer NeupaneSantosh KumarWanting Mao