Original table for reading images

Details Original table for reading images Original table for reading images

1988-08-26

1990-11-27

Coles, Sr., Edward L.

Facsimile and static presentation processing

Facsimile

Facsimile measuring, testing, or calibrating

358461, 358464, H04H 100

Patent

active

049740989

ABSTRACT:
According to this invention, since black regions are provided along the advancing direction on an original plate, the dark-time output levels of the linear sensor would not be affected by dust adhered on the original plate or the presence of trimming lines. Since a calibration region is provided, the circuit system can be calibrated with the maximum and minimum values of the signals from the linear sensor to thereby achieve more precise reading of images.

REFERENCES:
patent: 4554583 (1988-11-01), Saitoh et al.
patent: 4806780 (1989-02-01), Yamamoto et al.
patent: 4841376 (1989-06-01), Yamamoto et al.

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