| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an image reading apparatus which makes appropriate decision whether to replace parameters such as a light-source adjusted value and white corrected data with set values depending on a change in the incidence state of external light during each adjustment process. Ž<P>SOLUTION: The presence or absence of external light is determined (S7, S17, S27) during the execution of AFE adjusted value acquiring processing (S5), LED adjusted value acquiring processing (S15), and black corrected data acquiring processing (S25) separately. When it is determined in the process (S7, S17, S27) that the external light is present, a parameter acquired in S5, S15, or S25 in which it is determined that the external light is present is modified to a set value or a reacquired value. Therefore, even if the incidence state of the external light is changed when each of the parameters is acquired, appropriate decision can be made on whether to replace these parameters with the set values or the reacquired values. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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