an imaging system is disclosed for imaging recording media . the imaging system includes an input opening through which recording media may be input to the imaging system , and an imaging unit for imaging the recording media that is received through the input opening . the imaging unit provides a calibration image on the recording media . the imaging system also includes a calibration image receiving unit for receiving image data representative of the calibration image . the calibration image receiving unit produces imaging unit calibration adjustment data . the imaging system also includes an imaging unit adjustment controller , and an output opening . the imaging unit adjustment controller adjusts the imaging unit responsive to the imaging unit calibration adjustment data . the recording media exits the imaging system through the output opening .