IMAGE READING APPARATUS AND IMAGE FORMING SYSTEM

摘要

An image reading apparatus and an image forming system are provided which can reduce the influence of magnification error, detect patches in correct positions, and save the sheets required for adjusting an image. The image reading apparatus makes use of an image scanner which reads patches printed on a sheet P, a spectral colorimeter which colorimetrically measures the patches read by the image scanner, and is provided with a timing compensation unit which compensates the colorimetric measurement timing with which colorimetric operation of the spectral colorimeter is triggered based on the positional information of the patches read by the image scanner, and an image correction unit which corrects the color information of the patches read by the image scanner based on the colorimetric values of the patches colorimetrically measured by the spectral colorimeter.

主权项

1. An image reading apparatus utilizing an image scanner which reads a patch printed on a sheet and a spectral colorimeter which colorimetrically measures the patch read by the image scanner, said image reading apparatus comprising:
a timing compensation unit structured to compensate a colorimetric measurement timing with which colorimetric operation of the spectral colorimeter is triggered based on positional information of the patch read by the image scanner; and an image correction unit structured to correct color information of the patches read by the image scanner based on the colorimetric values of the patches colorimetrically measured by the spectral colorimeter.