Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1994-07-18
1997-06-10
Mancuso, Joseph
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358298, G06K 900
Patent
active
056381883
ABSTRACT:
An image processing apparatus of a digital copying apparatus, digital facsimile, printer, or the like comprises an input unit to input multi-level data, an arithmetic operation circuit for adding error data to the input multi-level data and calculating error correction data, a selector to select a predetermined dot pattern on the basis of the error correction data, an error calculation circuit to calculate a difference between a representative value for each dot pattern and the error correction data; and a storing circuit for storing the difference as error data into a memory. The selector comprises a level classification threshold value storage memory in which threshold values to classify the error correction data into levels have been stored, and a data level determination circuit for classifying the error correction data into levels on the basis of the value of the error correction data and the value stored in the level classification threshold value storage memory.
REFERENCES:
patent: 4742553 (1988-05-01), Irwin
patent: 4876610 (1989-10-01), Ohsawa et al.
patent: 4876611 (1989-10-01), Fischer et al.
patent: 4878125 (1989-10-01), Katayama et al.
patent: 4920501 (1990-04-01), Sullivan et al.
patent: 4926251 (1990-05-01), Sekizawa et al.
patent: 4958236 (1990-09-01), Nagashima et al.
patent: 4958238 (1990-09-01), Katayama et al.
patent: 4975786 (1990-12-01), Katayama et al.
patent: 5008950 (1991-04-01), Katayama et al.
patent: 5086484 (1992-02-01), Katayama et al.
patent: 5101283 (1992-03-01), Seki et al.
patent: 5140431 (1992-08-01), Cardillo
patent: 5187592 (1993-02-01), Sugiyama et al.
Masaki Katsumi
Moro Takahiro
Sawaki Takafumi
Ushiroda Atsushi
Canon Kabushiki Kaisha
Mancuso Joseph
Tadayon Bijan
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