Skew correction in line scanned images

摘要

A method of correcting for skew in a line scanning system, comprises receiving image information from a line scanner, the image information having background elements and image elements, and storing the elements as a map representing the image. Every kth line is selected and for each such line the location of a left-most image element is determined (105). This location is either the actual location of the left-most element on the line or the location of the left-most element in a search area surrounding that location, if more to the left. A best-fit line is generated (109, 111) through the locations of the left-most elements and the map is rotated (113, 115) through an angle which is the difference between the best-fit line and a line perpendicular to the scan lines.