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Exploratory study on remote photoplethysmography using visible light cameras

Szabała Tomasz, Vejar Andres

Przegląd Elektrotechniczny

2023

R. 99, nr 1

282--285

With visible light video cameras, it is possible to estimate the cardiac pulse, tracking the intensity changes in the image produced by the blood volume variations in the microvascular tissue. This estimation is provided by a measuring technique called remote photoplethysmography (RPPG). In this study we explore the data acquisition of the RPPG using standard video cameras used in personal computers.

Za pomocą kamer wideo w świetle widzialnym można oszacować tętno serca, śledząc zmiany intensywności obrazu wytwarzanego przez zmiany objętości krwi w tkance mikronaczyniowej. Oszacowanie to zapewnia technika pomiarowa zwana fotopletyzmografią zdalną (RPPG). W tym badaniu badamy akwizycję danych z RPPG przy użyciu standardowych kamer wideo używanych w komputerach osobistych.

Detection of type-2 diabetes using characteristics of toe photoplethysmogram by applying support vector machine

Nirala Neelamshobha, Periyasamy R., Singh Bikesh Kumar, Kumar Awanish

Biocybernetics and Biomedical Engineering

2019

Vol. 39, no. 1

38--51

Diabetes mellitus (DM) is one of the most widespread and rapidly growing diseases. With its advancement, DM-related complications are also increasing. We used characteristic features of toe photoplethysmogram for the detection of type-2 DM using support vector machine (SVM). We collected toe PPG signal, from 58 healthy and 83 type-2 DM subjects. From each PPG signal 37 different features were extracted for further classification. To improve the performance of SVM and reduce the noisy data we employed hybrid feature selection technique that reduces the feature set of 37 to 10 on the basis of majority voting. Using 10 selected features set, we gained an accuracy of 97.87%, sensitivity of 98.78% and specificity of 96.61%. Further for the validation of our method we need to do random population test, so that it can be used as a non-invasive screening tool. Photoplethysmogram is an economic, technically easy and completely non-invasive method for both physician and subject. With the high accuracy that we obtained, we hope that our work will help the clinician in screening of diabetes and adopting suitable treatment plan for preventing end organ damage.