Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1983-05-05
1987-05-19
Chin, Tommy P.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358282, H04N 514
Patent
active
046672370
ABSTRACT:
A binary digitizing apparatus in which the white and the black levels of the input signals are measured for determining a reference value, and thus determined reference value is used for binary digitizing the input signals.
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patent: 3723649 (1973-03-01), Pitegoff et al.
patent: 4187519 (1980-02-01), Vitols et al.
patent: 4345314 (1982-08-01), Malamud et al.
patent: 4446486 (1984-05-01), Itoth
Penny, "Dynamic Threshold Setting Circuit", IBM Technical Disclosure Bulletin, vol. 18, No. 6, 11/75, pp. 1962-1965.
Canon Kabushiki Kaisha
Chin Tommy P.
Harvey David E.
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