An barcode scanner with a pattern mirror that doubles as a radio frequency identification tag reader antenna to provide better overlap between barcode label and RFID tag reader reading zones. In the centralized mode, all of the Open Systems Interconnection reference model data link layer, also known as layer 2, protocol functions are implemented within the radio access network control entity, such as at a base station controller or similar network controller, before the data packets are delivered to one or more base station transceiver subsystems. The position of the subject’s pupils may be determined by scanning pupil locating features of the fixture. A current frame of the image is corrected by use of the areal correction coefficients calculated from ratios of areal reference values to areal average values on the current frame.