High resolution simulation printing by printing adjoining pels

Details High resolution simulation printing by printing adjoining pels High resolution simulation printing by printing adjoining pels

1994-11-15

1997-05-20

Coles, Sr., Edward L.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358101, 358296, 358298, 382299, 395109, H04N 140, H04N 121, G06F 1500

Patent

active

056317468

ABSTRACT:
Printer (1) having the capability of printing at 600.times.2400 dpi resolution simulates 1200.times.1200 dpi resolution by logically examining two lines of a 1200.times.1200 bit map and printing identically when possible and half black when only one of the two vertically adjacent bits signifies black, the bits for half printing being located to the right if the preceding bit is white and being located to the left if the preceding bit is black. This places the bits for half printing beside black bits and thereby extends the length of black printed, thereby reducing high frequency effects.

REFERENCES:
patent: 4656664 (1987-04-01), Anderson et al.
patent: 4893258 (1990-01-01), Sakuragi
patent: 5042075 (1991-08-01), Sato
patent: 5109283 (1992-04-01), Carley
patent: 5123082 (1992-06-01), Shimada
patent: 5327256 (1994-07-01), Kang et al.
patent: 5363211 (1994-11-01), Hasebe et al.

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