Facsimile and static presentation processing – Static presentation processing – Attribute control
Reexamination Certificate
2000-10-13
2008-08-26
Coles, Edward L. (Department: 2625)
Facsimile and static presentation processing
Static presentation processing
Attribute control
C358S003060, C358S502000
Reexamination Certificate
active
07417768
ABSTRACT:
CDE is measured for each nozzle array, to enable modification of a mapping between input image data and intended printing marks to compensate for the CDE. Printing proceeds using the modified mapping, which is either an optical-density transformation of data to printing marks or a spatial-resolution relation between image data and intended pixel grid. The density transformation preferably includes a dither mask (but can be error-diffusion thresholding instead); the resolution relation includes scaling of image data to pixel grid. For some invention forms, CDE includes printing-density defects, measured and used to derive a correction pattern—in turn used to modify halftone thresholding. For other forms CDE includes swath-height error, but still this is measured and used to derive a correction pattern etc. For still other forms, however, CDE includes swath-height error and correction takes the form of scaling. When the halftoning forms are applied to plural-pass printing, a printmask is used to map the dither mask etc. to the nozzle array, enabling application of the correction to the mask. Halftone forms ideally uses a gamma function, though threshold or linear corrections are possible instead. Halftone correction is effective in single-pass printing. The swath-height correction can modify heights of all nozzle arrays. Computations are done at most only once for a full image.
REFERENCES:
patent: 4891714 (1990-01-01), Klees
patent: 4924301 (1990-05-01), Surbrook
patent: 5287162 (1994-02-01), de Jong et al.
patent: 5289210 (1994-02-01), Takayanagi
patent: 5384587 (1995-01-01), Takagi et al.
patent: 5410414 (1995-04-01), Curry
patent: 5436739 (1995-07-01), Imao et al.
patent: 5600350 (1997-02-01), Cobbs et al.
patent: 5731827 (1998-03-01), Mantell et al.
patent: 5796414 (1998-08-01), Sievert et al.
patent: 5798773 (1998-08-01), Hiramatsu et al.
patent: 5813333 (1998-09-01), Ohno
patent: 5847722 (1998-12-01), Hackleman
patent: 5943448 (1999-08-01), Tatsuta
patent: 5988790 (1999-11-01), Koike et al.
patent: 6089693 (2000-07-01), Drake et al.
patent: 6172700 (2001-01-01), Obata
patent: 6333793 (2001-12-01), Kobayashi
patent: 6412903 (2002-07-01), Lee et al.
patent: 6672697 (2004-01-01), Haflinger
patent: 1029687 (1999-06-01), None
patent: 0983863 (1999-09-01), None
patent: 1034939 (2000-02-01), None
patent: A-0 983 863 (2000-03-01), None
patent: A-1 029 687 (2000-08-01), None
patent: A-1 034 939 (2000-09-01), None
patent: 04-041244 (1992-02-01), None
patent: 07-137290 (1995-05-01), None
patent: 07-246717 (1995-09-01), None
Boleda Miquel
Donovan David H.
Lammens Johan
Subirada Francesc
Coles Edward L.
Hewlett--Packard Development Company, L.P.
Lippman Peter I.
Thompson James A
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