| 摘要 |
Disclosed is an image reading apparatus that can change the amounts of light of an exposure lamp at the time of reading a white reference value (shading correction value) and at the time of reading an image, or changing a signal amplification factor of an amplification section for amplifying the output of a CCD line sensor, by using a white-level correction value which has been read at the time of assembling and adjusting the apparatus. This can provide high-quality images without performing complex image processing even if an indicator is placed at such a location where a user is easy to see and use it.
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