Facsimile and static presentation processing – Static presentation processing – Data corruption – power interruption – or print prevention
Reexamination Certificate
2006-12-19
2006-12-19
Williams, Kimberly (Department: 2625)
Facsimile and static presentation processing
Static presentation processing
Data corruption, power interruption, or print prevention
C399S015000, C399S072000
Reexamination Certificate
active
07151612
ABSTRACT:
The invention solves a problem of nonuniformities in density produced corresponding to a particular density level, especially due to density characteristics differing according to the density level, in a technique for correcting the nonuniformities in density of an image recorded by a recording head having plural recording elements arranged therein. Nonuniformities in density differently produced according to the density level can be effectively corrected by the steps of preparing a correction table group with correction differing according to the density level; correcting nonuniformities in density according to a test pattern with a predetermined density in advance; further recording test patterns corresponding to plural densities; and enabling the correction table group to be determined corresponding to the production of the nonuniformities according to the density level.
REFERENCES:
patent: 5528270 (1996-06-01), Tajika et al.
patent: 6160922 (2000-12-01), Hayashi
patent: 6439683 (2002-08-01), Matsumoto et al.
patent: 6697167 (2004-02-01), Takahashi
patent: 5-69545 (1993-03-01), None
Canon Kabushiki Kaisha
Fitzpatrick ,Cella, Harper & Scinto
Huntsinger Peter K.
Williams Kimberly
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