High‑quality retinal PPG signal acquisition via remote photoplethysmography

We present a non-contact method for extracting retinal photoplethysmographic (PPG) signals using remote photoplethysmography (rPPG). Retinal PPG signals are obtained from short fundus video recordings acquired with a non-mydriatic fundus camera by analyzing temporal pixel intensity changes from the retinal vasculature. The proposed processing framework reconstructs high-quality retinal PPG waveforms while preserving key morphological and temporal features. Quantitative results show an improvement in signal-to-noise ratio (SNR) of 2.65 dB compared to raw signals, enabling reliable identification of systolic and diastolic peaks and the dicrotic notch. These findings demonstrate the feasibility of non-contact retinal PPG acquisition for non-invasive assessment of retinal hemodynamics.