Image processing device, image processing method and print system

摘要

Disclosed is an image processing device including: a sample output unit to instruct a print device to successively print test images on a plurality of sheets of the recording paper; a profile preparing unit to prepare a plurality of profiles of the density unevenness in the sub-scanning direction in the plurality of sheets of the recording paper, from measuring data obtained by optically reading the test images; an analyzing unit to analyze the profiles by arranging the profiles in a printing order apart from each other so as to correspond to intervals of the sheets of the recording paper, and to detect a long period density unevenness in the sub-scanning direction, which has a long period extending through the plurality of sheets of the recording paper; and a correction data preparing unit to prepare correction data for removing the long period density unevenness.

主权项

1. An image processing device comprising:
a sample output unit to instruct a predetermined print device for printing an image on conveyed recording paper, to successively print test images for detecting a density unevenness in a sub-scanning direction which is a conveying direction of the recording paper, on a plurality of sheets of the recording paper; a profile preparing unit to prepare a plurality of profiles of the density unevenness in the sub-scanning direction in the plurality of sheets of the recording paper, from measuring data obtained by optically reading the test images which are successively printed on the plurality of sheets of the recording paper; an analyzing unit to analyze the plurality of profiles in the plurality of sheets of the recording paper, which are prepared by the profile preparing unit, by arranging the profiles in a printing order apart from each other so as to correspond to intervals of the sheets of the recording paper, and to detect a long period density unevenness in the sub-scanning direction, which has a long period extending through the plurality of sheets of the recording paper; and a correction data preparing unit to prepare correction data for removing the long period density unevenness in the sub-scanning direction, which is detected by the analyzing unit, wherein the analyzing unit prepares data in which the long period density unevenness in the sub-scanning direction is removed from the profiles prepared by the profile preparing unit, and detects a short period density unevenness in the sub-scanning direction, which has a short period contained in one sheet of the recording paper, by analyzing the prepared data, and the correction data preparing unit prepares correction data for removing the detected short period density unevenness in the sub-scanning direction.