Image sensor with an image section and a black level detection s

Details Image sensor with an image section and a black level detection s Image sensor with an image section and a black level detection s

1987-09-22

1989-03-07

Groody, James J.

Facsimile and static presentation processing

Facsimile

Recording apparatus

35821316, 35821325, 35821326, 35821329, H04N 315, H04N 5335

Patent

active

048111058

ABSTRACT:
An image sensing apparatus has an image section, a black level detection section, a storage section, a read out device, and a compensator. The image section is capable of receiving light and includes a plurality of horizontal shift registers juxtaposed in the vertical direction. The black level detector section is shielded from light and is formed at the start portion of transference of each horizontal shift register of the image section. The storage section is formed adjoining the image section in the horizontal direction and stores image signals produced in the image section and black level signals produced in the shielded section. The read out device reads out the signals stored in the storage section line-by-line in a horizontal scanning period. The compensator clamps a black level signal in the signals of one horizontal line read out by the read out device to a predetermined reference level.

REFERENCES:
patent: 4010319 (1977-03-01), Levine
patent: 4263620 (1981-04-01), Felix
patent: 4490744 (1984-12-01), Levine
patent: 4510528 (1985-04-01), Bergen
patent: 4513313 (1985-04-01), Kinoshita et al.
patent: 4594612 (1986-06-01), Levine
patent: 4641183 (1987-02-01), Kinoshita
patent: 4644403 (1987-02-01), Sakai et al.
patent: 4663656 (1987-05-01), Elabd et al.
patent: 4737841 (1988-04-01), Kinoshita et al.

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