Selecting a region of interest to extract physiological parameters from a subject's video

摘要

Disclosed is a system and method for selecting a region of interest for extracting physiological parameters from a subject's video. In an embodiment, the present method includes performing the following steps. First, a plurality of time series signals generated by processing frames of a subject's video captured with a spectral range video camera having a band pass filter having a pass band in a wavelength range of 495-565 nm and / or 800-1000 nm are received. The areas of interest are areas in which a plethysmographic signal can be detected by the camera. Each time-series signal belongs to a different region of interest. Subsequently, a signal strength is calculated for each of these time series signals. The area to which the time-series signal with the largest signal strength belongs is selected. The time-series signal associated with the selected area may be processed to extract a video -oplethysmographic signal (VPG signal) containing physiological parameters.