US Patent 8062220 Monitoring physiological conditions

A method for unobtrusive screening the well-being of a person using a plurality of sensing devices, including detecting the presence of a person; identifying and tracking the person; using sensing devices, which includes at least one camera, to unobtrusively sense one or more body parameters of the person; calculating and storing wellness parameters, which are derived from the sensed body parameter data; and automatically evaluating the well-being of the person based on current and prior semantic data including comparing the wellness parameters to previously determined wellness parameters for that person.