Image reading apparatus

Details Image reading apparatus Image reading apparatus

2006-04-25

2006-04-25

Patel, Kanjibhai (Department: 2625)

Image analysis

Applications

Document or print quality inspection

C250S559020, C356S404000, C356S443000

Reexamination Certificate

active

07035437

ABSTRACT:
The image reading apparatus for photoelectrically reading an original image includes an image reading device and a detection device. The image reading device has first reading unit for reading a visible image carried by the original image and a second reading unit for reading a reference image in a wavelength different from that used to read the visible image. The detection device acquires correlative pixel distribution information between a visible image signal and a reference image signal using the visible image and the reference image having been read by the image reading device and detects an image defect caused by a foreign particle deposited on the original image and a flaw of an original using the information. The apparatus can detect the image defect of the film with pinpoint accuracy without erroneous detection without depending upon a type of the film and a state of the image, and output in excellent productivity an image of high quality whose image defect has been preferably corrected.

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