Patent ID: 6813573
Filing Date: 2004-11-02
Classification: H04N

Abstract:
A method of calibrating a peripheral device of the type which has a document feeder that feeds document pages to be scanned and a scanner having a scanning head that is capable of scanning at least a first predetermined scan line window width that can be laterally adjusted relative to a wider scanable width, said method comprising the steps of:feeding a target page having a target at a known location into the document feeder so that the target page can be scanned by the scanner; scanning the target on the target page; determining a calibration value for the document feeder from the lateral position of the scanned target by determining a set of pixels scanning the target, determining a pixel value associated with a lateral center of the set of pixels reading the scanned target, and determining the calibration value using the pixel value; and, adjusting the lateral position of the scan line window width using said calibration value to scan substantially only the entire width of the document.