Manuscript reading apparatus

Details Manuscript reading apparatus Manuscript reading apparatus

1985-04-17

1986-07-22

Groody, James J.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358285, 358294, H04N 104, H04N 140

Patent

active

046022937

ABSTRACT:
Manuscript reading apparatus is constituted by a manuscript guide disposed in the path of the manuscript and formed with a shading correction reference surface, a photoelectric converter for reading the shading correction reference surface prior to the passing of the manuscript along the manuscript guide and for reading a picture image of the manuscript when the same passes along the manuscript guide, memory means for storing the output of the shading correction reference surface when it is read by the photoelectric converter, and correcting means for correcting the read out output of the manuscript picture image outputted from the photoelectric converter in accordance with the content of the memory means. The manuscript guide is provided with a recess in its guide surface and the shading correction reference surface is formed in the recess. With this apparatus it is possible to always obtain stable reference signal and to obtain a picture image signal of adequate tone.

REFERENCES:
patent: 3560646 (1971-02-01), Buc
patent: 4177449 (1979-12-01), Ikeda
patent: 4228468 (1980-10-01), Nagano et al.

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