Graphic data processing apparatus for producing a tone for an ed

Details Graphic data processing apparatus for producing a tone for an ed Graphic data processing apparatus for producing a tone for an ed

1991-02-22

1994-03-29

Shaw, Dale M.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358456, 358455, 395109, 395128, G06F 1520

Patent

active

052993086

ABSTRACT:
The tones (or densities) of individual edge pixels of vector data are determined by first dividing each edge pixel into subpixels, after which the thus-determined tones are fed to a laser printer or other output unit. Advantageously, the present invention smooths jagged edges by performing an anti-aliasing process. To achieve this smoothing of graphic data, any of a variety of filters, each having particular weights, are used for the process of dividing edge pixels into subpixels.

REFERENCES:
patent: 4607340 (1986-08-01), Nagai
patent: 4827352 (1989-05-01), Yoneda et al.
patent: 4840460 (1989-06-01), Bernot et al.
patent: 4908780 (1990-03-01), Priem et al.
patent: 4965672 (1990-10-01), Duke et al.
patent: 5012257 (1991-04-01), Lowe et al.
patent: 5029108 (1991-07-01), Lung
patent: 5086484 (1992-02-01), Katayama et al.
patent: 5140315 (1992-08-01), Edelson et al.
"Computer Graphics" by Hearn et al, Prentice Hall, 1986, pp. 91-92.

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