| 摘要 |
The image forming apparatus includes a unit for radiating light to an original with plural lighting conditions, a unit for changing the lighting condition according to a concentration of the original and reference exposure data, a unit for storing the reference exposure data, a unit for forming an image on an image carrier under different image forming conditions, using light radiated by the radiating unit and sent via the original, a unit for changing in a first mode the image forming conditions, and changing in a second mode the reference exposure data stored by the storing unit, and a unit for switching the first and second modes so as to change the operation of the changing unit.
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