Ambient Light Contribution as a Reference for Motion Artefacts Reduction in Photoplethysmography

Nicolas de Pinho Ferreira (1) , Claudine Gehin (1) , Bertrand Massot (1)

1 INL - Capteurs - INL - Capteurs Biomédicaux

Measuring the heart rate from a convenient location such as the wrist is commonly achieved using photo-plethysmography. As a consequence, this method is widely used on commercial wearable devices. Unfortunately , it also highly suffers from motion artefacts superimposed into the cardiac frequency band which generally lead to incorrect heart rate estimation. In this paper we propose a new approach that uses the ambient light contribution as a reference for motion artefacts reduction. Contrarily to accelerometer-based techniques, the proposed method does not require any additional hardware. Moreover, it is especially efficient for reduction of micro-motions that can't be addressed using conventionally used accelerometry. Using the ambient light signal as a reference in association with adaptive filtering has demonstrated promising results for the reduction of artefacts during both periodic and random motion events.

Mots clés: heart rate; photoplethysmography; motion artefacts; ambient light; adaptive filtering

Domaines: Electronique; Physiologie [q-bio.TO]; Optique / photonique; Traitement du signal et de l'image [eess.SP]

Nicolas de Pinho Ferreira, Claudine Gehin, Bertrand Massot. Ambient Light Contribution as a Reference for Motion Artefacts Reduction in Photoplethysmography. 13th International Conference on Biomedical Electronics and Devices, Feb 2020, Valletta, Malta. pp.23-32, ⟨10.5220/0008878800230032⟩. ⟨hal-02882018⟩