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Image reading apparatus that can correct chromatic aberration caused by optical system and chromatic aberration correction method
Image reading apparatus that can correct chromatic aberration caused by optical system and chromatic aberration correction method
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机译:可以校正由光学系统引起的色差的图像读取设备和色差校正方法
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摘要
In order to correct chromatic aberration accurately and read out a document original properly, an image reader apparatus includes a chromatic aberration correction chart, a CCD linear sensor, and a correction processing unit. A chromatic aberration correction chart includes a high reflectance portion and a low reflectance portion lower than the high reflectance portion. A CCD linear sensor receives light reflected from the chromatic aberration correction chart. A correction processing unit corrects chromatic aberration of image data according to a light receiving position in the photoelectric conversion unit receiving light of a first wavelength included in the reflected light from the chromatic aberration correction chart and a light receiving position in the photoelectric conversion unit receiving light of a second wavelength included in the reflected light from the chromatic aberration correction chart.
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