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.