1. A method for compensating for motion induced artifacts in physiological signals obtained from multiple videos captured by multiple video imaging devices of a subject being monitored for a desired physiological function in a non-contact, remote sensing environment, the method comprising: receiving N videos, where N≧2, of a subject being monitored for a desired physiological function, each video comprising a plurality of time-sequential image frames acquired concurrently by N video devices, at least one of said videos being of a first region and at least one of said videos being of a second region, said first region being at least one area of exposed skin where a desired signal corresponding to said physiological function can be registered by a 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 videos to isolate pixels in said image frames associated with each of said first and second regions of interest; processing pixels of each of said isolated first regions to obtain a composite time-series signal; extracting, from said composite time-series signal, a physiological signal corresponding to said desired physiological function; analyzing pixels of each of said isolated second regions to identify time intervals when movement by said subject 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.