Patent ID: 6694062
Filing Date: 2004-02-17
Classification: H04N

Abstract:
A device for correcting dark lines of a scanned image generated by an image scanner, comprising:a base scan data calculation unit, coupled to the image scanner, for calculating a plurality of base scan data corresponding to positions of a typical scanning line in accordance with a calibrated output generated by the image scanner scanning a reference document; a reference scan data calculation unit, coupled to the base scan data calculation unit, for calculating a plurality of reference scan data corresponding to the positions of the typical scanning line in accordance with the base scan data provided by said base scan computation section and a numerical processing procedure; a defect level unit for providing a defect level; a defect marking unit, coupled to the base scan data calculation unit, the reference scan data calculation unit and the defect level unit, for marking a defect position on the positions of the typical scanning line comparing the difference between the base scan data and the reference scan data with the defect level; and a correction unit, coupled to the image scanner and the defect marking unit, for correcting the scanned image according to the defect position to eliminate dark lines.