| 摘要 |
PROBLEM TO BE SOLVED: To correct optimally a color aberration of an optical system in response to read resolution. SOLUTION: The reader is provided with a 3-line sensor 1 that has plural read pixel arrays reading plural color information sets from image information of an original via an optical system, a recognition means that recognizes plural scales with different spatial frequencies which are extended in a direction along the read pixel array of the 3-line sensor 1 and recognizes a spatial frequency component of an image included in the image information of the original, a read means that reads a scale in response to the spatial frequency component recognized by the recognition means, a detection means that detects a deviation in the magnification of the optical system in plural color information sets from the read value, and a deviation correction section 6 that corrects the image information of the original read by the read means in response to the deviation in the magnification detected by the detection means. |
