Facsimile and static presentation processing – Facsimile – Picture signal generator
Patent
1995-01-06
1995-09-26
Coles, Sr., Edward L.
Facsimile and static presentation processing
Facsimile
Picture signal generator
358462, 358464, H04N 104
Patent
active
054538505
ABSTRACT:
An image reading apparatus includes a light source for illuminating a document, and a line image CCD for performing photoelectric conversion on the light reflected from the document. Particularly, the image reading apparatus further includes a light shutting device for selectively shutting off the light directed toward the line image CCD, and a processing section for obtaining, as reference black data, the output data of the line image CCD produced in a state where the light directed toward the line image CCD is shut off, for obtaining, as image data of the document, the output data of the line image CCD produced in a state where the light directed toward the line image CCD is not shut off, and for performing shading correction on the image data according to the reference black data.
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patent: 5079638 (1992-01-01), Kishi et al.
patent: 5084772 (1992-01-01), Shimoyama
patent: 5105286 (1992-04-01), Sakurai
patent: 5202773 (1993-04-01), Kato
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patent: 5296944 (1994-03-01), Suzuki et al.
Akuzawa Yoshihide
Serizawa Yasutoshi
Urata Hiromasa
Coles Sr. Edward L.
Tokyo Electric Co. Ltd.
Vu Kim Yen
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