Anti-aliasing apparatus and method using fast scan-line memory m

Details Anti-aliasing apparatus and method using fast scan-line memory m Anti-aliasing apparatus and method using fast scan-line memory m

1994-11-23

1997-01-21

Coles, Sr., Edward L.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

395115, 358447, 358298, 345136, 382305, G06K 1500

Patent

active

055966845

ABSTRACT:
A method processes a plurality of bits stored in a first memory and representing an image to be printed by reproducing the bits in a fast scan direction. The method includes the step of reading a plurality of groups from the first memory into a second memory, wherein each of the groups comprises a number of bits greater than one bit and is stored in the second memory in the fast scan direction, and wherein each group is read one group at a time. Further, the method includes copying a predetermined number of bits from each of the plurality of groups to a sample storage area. After the copying step, the method samples the bits of the copied groups wherein the sampled bits form a pattern having a center bit having a binary state. Finally, after the sampling step, the method outputs a print signal representative of the binary state if the pattern does not match a predetermined pattern, or outputs a print signal different than the binary state if the pattern matches a predetermined pattern.

REFERENCES:
patent: 4847641 (1989-07-01), Tung
patent: 5005139 (1991-04-01), Tung
patent: 5222214 (1993-06-01), Kobayashi
patent: 5249242 (1993-09-01), Hanson et al.
patent: 5327260 (1994-07-01), Shimomae et al.

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