| 摘要 |
A color image read apparatus which makes efficient color balance correction and shading correction by a simple configuration in a manner that color balance correction of image signals of plural colors of a color image sensor using optoelectric transducers is made in A/D conversion on the basis of a reference voltage for each color, and shading correction thereof is made on the basis of one reference data obtained from image signals of plural colors of a reference white pattern read prior to an original.
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