A method of remote monitoring of vital signs by detecting the PPG signal in an image of a subject taken by a video camera such as a webcam. The PPG signal is identified by auto-regressive analysis of ambient light reflected from a region of interest on the subject's skin. Frequency components of the ambient light and aliasing artefacts resulting from the frame rate of the video camera are cancelled by auto-regressive analysis of ambient light reflected from a region of interest not on the subject's skin, e.g. in the background. This reveals the spectral content of the ambient light allowing identification of the subject's PPG signal. Heart rate, oxygen saturation and breathing rate are obtained from the PPG signal. The values can be combined into a wellness index based on a statistical analysis of the values.
申请公布号
WO2013027027(A2)
申请公布日期
2013.02.28
申请号
WO2012GB52004
申请日期
2012.08.16
申请人
ISIS INNOVATION LIMITED;CLIFTON, DAVID ANDREW;MONTOYA, MAURICIO CHRISTIAN VILLARROEL;TARASSENKO, LIONEL
发明人
CLIFTON, DAVID ANDREW;MONTOYA, MAURICIO CHRISTIAN VILLARROEL;TARASSENKO, LIONEL