2134/22196 Ping Shi Ping Shi Sijung Hu Sijung Hu Angelos S. Echiadis Angelos S. Echiadis V Azorin-Peris V Azorin-Peris Jia Zheng Jia Zheng Yisheng Zhu Yisheng Zhu Development of a remote photoplethysmographic technique for human biometrics Loughborough University 2016 Photoplethysmography Non-contact Power spectrum Recurrence plot Bland-Altman plot Mechanical Engineering not elsewhere classified 2016-08-04 10:41:20 Journal contribution https://repository.lboro.ac.uk/articles/journal_contribution/Development_of_a_remote_photoplethysmographic_technique_for_human_biometrics/9572345 Non-contact reflection photoplethysmography (NRPPG) is being developed to trace pulse features for comparison with contact photoplethysmography (CPPG). Simultaneous recordings of CPPG and NRPPG signals from 22 healthy subjects were studied. The power spectrum of PPG signals were analysed and compared between NRPPG and CPPG. The recurrence plot (RP) was used as a graphical tool to visualize the time dependent behaviour of the dynamics of the pulse signals. The agreement between NRPPG and CPPG for physiological monitoring, i.e. HRV parameters, was determined by means of the Bland-Altman plot and Pearson’s correlation coefficient. The results indicated that NRPPG could be used for the assessment of cardio-physiological signals.