Clifton, David Andrew,Montoya, Mauricio Christian Villarroel,Tarassenko, Lionel
申请号：
AU2012298362
公开号：
AU2012298362A1
申请日:
2012.08.16
申请国别(地区):
AU
年份:
2014
代理人:
摘要：
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 subjects 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 subjects skin, e.g. in the background. This reveals the spectral content of the ambient light allowing identification of the subjects 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.
