摘要 |
Pieces of reading frequency information representing the use frequencies of first and second reading units are acquired. Read color information of a color on a document that is read by the first or second reading unit is acquired. Based on the acquired pieces of reading frequency information and the acquired read color information, one of the first and second reading units is decided as a reference reading unit serving as a reference when performing correction to make the reading characteristics of the first and second reading units relatively coincide with each other. |