Photometry based blood oxygen estimation through smartphone cameras

Nam Bui, Anh Nguyen, Phuc Nguyen, Hoang Truong, Ashwin Ashok, Thang Dinh, Robin Deterding, Tam Vu

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

We introduce a lightweight, cost-effective, and portable solution for real-time peripheral oxygen saturation (SpO2) measurement using photometric sensing through a smartphone's camera. Specifically, we design a hardware plug-in module that snaps onto the smartphone's flashlight and estimates the blood oxygen content from the light intensity reflected off the user's finger and registered on camera images. The oxygen levels are mapped to equivalent photoplethysmography (PPG) signals used for the SpO2 estimation using a machine learning based one-time calibration. With the knowledge that blood oxygen largely responds to Infrared (IR) and Red wavelengths, state-of-the-art pulse oximetry techniques use IR and RED light emitting diodes and photodetectors to sense each channel. We further develop a novel solution that exploits the IR leakage of the LED white light of the smartphone. The system is incorporated with a hardware of IR and RED filters that are spatially separated such that the respective signals are registered on independent areas of the image sensor. We present the preliminary results and analyse possible challenges for further improvement.

Original languageEnglish
Title of host publicationS3 2017 - Proceedings of the 9th ACM Workshop on Wireless of the Students, by the Students, and for the Students, co-located with MobiCom 2017
PublisherAssociation for Computing Machinery, Inc
Pages29-31
Number of pages3
ISBN (Electronic)9781450351454
DOIs
StatePublished - Oct 20 2017
Event9th ACM Workshop on Wireless of the Students, by the Students, and for the Students, S3 2017 - Snowbird, United States
Duration: Oct 20 2017 → …

Publication series

NameS3 2017 - Proceedings of the 9th ACM Workshop on Wireless of the Students, by the Students, and for the Students, co-located with MobiCom 2017

Conference

Conference9th ACM Workshop on Wireless of the Students, by the Students, and for the Students, S3 2017
Country/TerritoryUnited States
CitySnowbird
Period10/20/17 → …

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