1. A system for uniquely identifying a particular individual subject from a group of subjects, wherein each individual subject in said group of subjects includes at least one external characteristic having a plurality of features that are unique to said individual subject, comprising: subject processing means for positioning a subject; image generation means for obtaining an image of said positioned subject that records said plurality of features of said at least one of said external characteristics; image data processing means for performing a correlation of said image of said positioned subject with previously recorded images of subjects; and database match means for generating an indication of a match when said image of said positioned subject matches one of said previously recorded images of subjects.