| 摘要 |
The density unevenness peculiar to a printer unit is corrected in advance in a reader unit regardless of selection of rotative or non-rotative processing of an output image. The counter instructs a pixel address, which corresponds to the rotative or the non-rotative processing of the output image, to a head shading gamma table number designation table. A table number is input from the head shading gamma table number designation table by a head shading gamma conversion table which stores a head shading gamma table corresponding to a characteristic peculiar to the printer unit and multivalue image data is density converted in accordance with the table number.
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