Multispectral Depolarization based Living-skin Detection: A New Measurement Principle

Wang，Wenjin1; Shu，Huaijing1; Lu，Hongzhou2; Xu，Ming3; Ji，Xiangyang3

2024

10.1109/TBME.2024.3356410

IEEE Transactions on Biomedical Engineering   影响因子和分区

0018-9294

1558-2531

Camera-based photoplethysmographic imaging enabled the segmentation of living-skin tissues in a video, but it has inherent limitations to be used in real-life applications such as video health monitoring and face anti-spoofing. Inspired by the use of polarization for improving vital signs monitoring (i.e. specular reflection removal), we observed that skin tissues have an attractive property of wavelength-dependent depolarization due to its multi-layer structure containing different absorbing chromophores, i.e. polarized light photons with longer wavelengths (R) have deeper skin penetrability and thus experience thorougher depolarization than those with shorter wavelengths (G and B). Thus we proposed a novel dual-polarization setup and an elegant algorithm (named “MSD”) that exploits the nature of multispectral depolarization of skin tissues to detect living-skin pixels, which only requires two images sampled at the parallel and cross polarizations to estimate the characteristic chromaticity changes (R/G) caused by tissue depolarization. Our proposal was verified in both the laboratory and hospital settings (ICU and NICU) focused on anti-spoofing and patient skin segmentation. The clinical experiments in ICU also indicate the potential of MSD for skin perfusion analysis, which may lead to a new diagnostic imaging approach in the future. The proposed MSD algorithm is extremely simple to implement (only 5 lines of Matlab code) and its performance is highly reproducible: https://github.com/contactless-healthcare/Multispectral-Depolarization-based-Living-skin-Detection

Cameras clinical trial Faces Hospitals Living-skin detection multi-wavelength Optical surface waves Photonics polarization Reflection Skin skin depolarization

SCI ; EI

英语

第一

ENGINEERING

2-s2.0-85182939749

Scopus

1.Department of Biomedical Engineering, Southern University of Science and Technology, China
2.The Third People's Hospital of Shenzhen, China
3.Department of Automation, Tsinghua University, China

Wang，Wenjin,Shu，Huaijing,Lu，Hongzhou,et al. Multispectral Depolarization based Living-skin Detection: A New Measurement Principle[J]. IEEE Transactions on Biomedical Engineering,2024,PP(99):1-13.

Wang，Wenjin,Shu，Huaijing,Lu，Hongzhou,Xu，Ming,&Ji，Xiangyang.(2024).Multispectral Depolarization based Living-skin Detection: A New Measurement Principle.IEEE Transactions on Biomedical Engineering,PP(99),1-13.

Wang，Wenjin,et al."Multispectral Depolarization based Living-skin Detection: A New Measurement Principle".IEEE Transactions on Biomedical Engineering PP.99(2024):1-13.