Facsimile and static presentation processing – Facsimile – Recording apparatus
Patent
1992-12-29
1996-02-13
Wong, Peter S.
Facsimile and static presentation processing
Facsimile
Recording apparatus
358459, 382266, H04N 140, G06K 940
Patent
active
054915589
ABSTRACT:
A method and associated apparatus is implemented for utilization in a halftone printing system to permit a halftone dot to be written with multiple density levels. These multiple density levels are used to from a variable density dot edge profile. This implementation is particularly adapted for use with systems that represent halftone dots with an envelope that is formed from a combination of straight lines that are drawn from tangent points, on the outer periphery of the dot, through reference axis for the dot. The intersection points of the tangent lines on the reference axis define the size (density) of the dot. The intersect points are stored as sets of digital values for each size dot to provide a unique representation set that is used to reconstruct a selected dot size for the printing of a halftone image.
REFERENCES:
patent: 5134667 (1992-07-01), Suzuki
patent: 5231677 (1993-07-01), Mita et al.
patent: 5233441 (1993-08-01), Hamilton
patent: 5239391 (1993-08-01), Hamilton
patent: 5251267 (1993-10-01), Kawamura
patent: 5299308 (1994-03-01), Suzuki et al.
Hamilton John F.
Leone Anthony J.
Dugas Edward
Eastman Kodak Company
Frahm Eric
Wong Peter S.
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