Facsimile and static presentation processing – Facsimile – Recording apparatus
Patent
1985-07-17
1987-07-14
Coles, Sr., Edward L.
Facsimile and static presentation processing
Facsimile
Recording apparatus
358280, 250578, 250214AG, 250214C, H04N 1024
Patent
active
046806440
ABSTRACT:
There is a method and an apparatus for reading an image in which the light emitted from a light source through an original is converted into an electric signal by a photoelectric converting device and is outputted as an image singal. In this method, a compensation light is radiated onto the photoelectric converting device and thereby causing a compensation signal to be generated therefrom; this compensation signal is stored into a memory; an original image is then read; and the read signal is compensated by the compensation signal stored in the memory. The compensation light corresponds to each intensity of lights which are obtained through a reference original to be read and which are received by the photoelectric converting device. By use of this method in an original reading section of a facsimile apparatus or the like, an ununiformity and a variation in signal of each bit which is read by the photoelectric converting device are compensated, so that a stable output image signal can be derived.
REFERENCES:
patent: 4133008 (1979-01-01), Tisue
patent: 4174528 (1979-11-01), White
patent: 4341956 (1982-07-01), Bax
Iwamoto Hirofumi
Kawai Tatsundo
Komatsu Toshiyuki
Kuroda Yasuo
Nakagawa Katsumi
Canon Kabushiki Kaisha
Coles Sr. Edward L.
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