Generalized channel separation algorithms for accurate camera-based multi-wavelength PTT and BP estimation
Gašper Slapničar,
Wenjin Wang,
Mitja Luštrek
Abstract:Single-site multi-wavelength (MW) pulse transit time (PTT) measurement was recently proposed using contact sensors with sequential illumination. It leverages different penetration depths of light to measure the traversal of a cardiac pulse between skin layers. This enabled continuous single-site MW blood pressure (BP) monitoring, but faces challenges like subtle skin compression, which importantly influences the PPG morphology and subsequent PTT. We extended this idea to contact-free camera-based sensing and i… Show more
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