Vital physical signals measurements using a webcam

Jianfei Ouyang; Yonggang Yan; Lifeng Yao

doi:10.1117/12.2033273

11 October 2013 Vital physical signals measurements using a webcam

Jianfei Ouyang, Yonggang Yan, Lifeng Yao

Proceedings Volume 8915, Photonics North 2013; 891502 (2013) https://doi.org/10.1117/12.2033273
Event: Photonics North 2013, 2013, Ottawa, Canada

Abstract

Non-contact and remote measurements of vital physical signals are important for reliable and comfortable physiological self-assessment. In this paper, we provide a new video-based methodology for remote and fast measurements of vital physical signals such as cardiac pulse and breathing rate. A webcam is used to track color video of a human face or wrist, and a Photoplethysmography (PPG) technique is applied to perform the measurements of the vital signals. A novel sequential blind signal extraction methodology is applied to the color video under normal lighting conditions, based on correlation analysis between the green trace and the source signals. The approach is successfully applied in the measurement of vital signals under the condition of different illuminating in which the target signal can also be found out accurately. To assess the advantages, the measuring time of a large number of cases is recorded correctly. The experimental results show that it only takes less than 30 seconds to measure the vital physical signals using presented technique. The study indicates the proposed approach is feasible for PPG technique, which provides a way to study the relationship of the signal for different ROI in future research.

Citation Download Citation

Jianfei Ouyang, Yonggang Yan, and Lifeng Yao "Vital physical signals measurements using a webcam", Proc. SPIE 8915, Photonics North 2013, 891502 (11 October 2013); https://doi.org/10.1117/12.2033273

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