Compensating for motion induced artifacts in a physiological signal extracted from a single video

A system for compensating for motion induced artifacts in physiological signals obtained from a single video captured by a single video imaging device of a subject being monitored for a desired physiological function in a non-contact, remote sensing environment, the system comprising:

• a video imaging device for capturing video comprising a plurality of time-sequential image frames;
• and
• a processor in communication with a memory and said storage device, said processor executing machine readable program instructions for performing the steps of:
• receiving a video captured by said video imaging device of at least a first and second region of interest of a subject being monitored for a desired physiological function, said first region being an area of exposed skin wherein a desired signal corresponding to said physiological function can be registered by the video imaging device, said second region being an area where a movement by said subject is likely to induce motion artifacts into said signal;
• processing said video to isolate pixels in said image frames associated with each of said first and second regions of interest;
• processing pixels of said isolated first region to generate a time-series signal;
• extracting, from said time-series signal, a physiological signal corresponding to said desired physiological function;
• analyzing pixels of said isolated second region to identify time intervals when movement by said subject has occurred;
• and
• for each of said identified time intervals when movement has occurred:
• determining an amount of movement over the current interval;
• and
• in response to said movement being above a maximum threshold, discarding a segment of said physiological signal corresponding to said current interval, otherwise in response to said movement being below a minimum threshold, leaving a segment of said physiological signal corresponding to the current interval as-is, otherwise replacing said segment with a default segment.