IMAGE PROCESSING APPARATUS AND METHOD FOR GENERATING CORRECTION FORMULA

摘要

An image processing apparatus includes a support member to support a sheet, a light source that extends in a main-scanning direction and is configured to move in a sub-scanning direction and irradiate light on the sheet as the light source moves in the sub-scanning direction, a conversion unit configured to generate multiple line image data based on light reflected by the sheet and incident thereon, as the light source moves in the sub-scanning direction, and a processing unit configured to carry out a correction process with respect to each of the line image data using a different correction formula for each of the line image data.

主权项

1. An image processing apparatus comprising:
a platen to support a sheet; a light source that extends in a main-scanning direction and is configured to move in a sub-scanning direction and irradiate light on the sheet as the light source moves in the sub-scanning direction; an image sensor configured to generate multiple line image data based on light reflected by the sheet and incident thereon, as the light source moves in the sub-scanning direction; and a processor configured to: i) generate a correction formula exclusively associated with a scanning position in the sub-scanning direction, based on first line image data generated from scanning of a plain sheet at a reference position, and second line image data generated from scanning of the plain sheet at a comparative position that is apart from the reference position by predetermined scanning positions in the sub-scanning direction; and ii) carry out a correction process with respect to line image data generated when the light source is at the scanning position, using the correction formula.