Patent ID: 6459507
Filing Date: 2002-10-01
Classification: H04N

Abstract:
A method for generating a stepping control table of an image scanner, the scanner comprising a line scanning module, a driving device, and a control device, the stepping control table comprising a plurality of stepping number wherein the control device uses the stepping control table to control the driving device, the method comprising the steps of:providing a calibrating document having a calibrating pattern; driving an object selected from the group of the scanning module and the calibrating document along a scanning direction; scanning the calibrating document; generating a plurality of line image signals, each line image signal representing an image of the calibrating pattern; recording a step position of the scanning module when generating a line image signal; calculating an actual scanning position of the line image signal according to a variation between the image of the calibrating pattern of the line image signal and an image of the calibrating pattern of another line image signal; and generating the stepping control table according to the recorded step position and the actual scanning position of the line image signal.