| 摘要 |
PROBLEM TO BE SOLVED: To suppress the generation of density irregularities in the main scanning direction of an image carrier in an image formation part at a low cost and to form excellent images. SOLUTION: The test image having prescribed density is formed and it is read by a reader part 18. In the read, the density data of the image in the main scanning direction (direction vertical to the carrying direction of a recording medium) of a photosensitive drum 1 in the image formation part are obtained. As a result, since the density characteristics of the main scanning direction in the image formation part are obtained, correction data based on them are prepared and stored in a correction table inside a main scanning irregularity correction circuit 50. Thereafter, normally, at the time of forming the read images in the main scanning direction at the time of a copying operation, pixel data there are corrected by the correction data and the images are formed. |
