1. A method of identifying, tracking, and counting objects of interest based upon at least one pair of stereo image frames taken by at least one image capturing device, comprising the steps of: obtaining said at least one pair of stereo image frames and converting each said stereo image frame to a rectified image frame using calibration data obtained from said at least one image capturing device; identifying the presence or absence of said objects of interest and comparing each of said objects of interest to existing tracks comprising previously identified objects of interest; for each said presence of an object of interest, adding said object of interest to one of said existing tracks if said object of interest matches said one existing track, or creating a new track comprising said object of interest if said object of interest does not match any of said existing tracks; and wherein each track further comprises a set of additional track attributes including, a status attribute for each said track taking one value from three possible values: active, inactive, or deleted, wherein said status attribute is set to be active if said track comprises the object of interest in the most recent frame, inactive if said track does not comprise any object of interest in the most recent frame, and deleted if said track is marked for deletion.