Sidorov Igor S, Volynsky Maxim A, Kamshilin Alexei A
Department of Computer Photonics and Videomatics, ITMO University, St. Petersburg, 197101, Russia.
Biomed Opt Express. 2016 Jun 2;7(7):2469-74. doi: 10.1364/BOE.7.002469. eCollection 2016 Jul 1.
Imaging photoplethysmography (IPPG) is a recently developed technique for noncontact assessment of cardiovascular function. However, its wide use is limited by low signal-to-noise ratio due to motion artifacts. The aim of this work is to estimate the polarization-filtration impact on discriminating artifacts in IPPG measurements. Experiments were carried out in-vivo by almost simultaneous illumination of subject's palm with polarized and non-polarized light during video recording of 41 subjects. It was found that the light-polarization filtration efficiently reduces motion artifacts compared to the non-polarized illumination while the pulsation amplitude measured at the heartbeat frequency remains unaffected. The polarization filtration improves reliability of IPPG system in non-contact monitoring of subject's heart rate and its variability.
成像光电容积脉搏波描记法（IPPG）是一种最近开发的用于心血管功能非接触评估的技术。然而，由于运动伪影导致的低信噪比限制了其广泛应用。这项工作的目的是评估偏振滤波对IPPG测量中伪影识别的影响。在对41名受试者进行视频记录期间，通过用偏振光和非偏振光几乎同时照射受试者的手掌进行了体内实验。结果发现，与非偏振照明相比，光偏振滤波能有效减少运动伪影，而在心跳频率下测量的脉动幅度不受影响。偏振滤波提高了IPPG系统在非接触监测受试者心率及其变异性方面的可靠性。
