Gradation correction curve producing method, gradation...

Details Gradation correction curve producing method, gradation... Gradation correction curve producing method, gradation...

2005-03-08

2005-03-08

Lee, Thomas D. (Department: 2624)

Facsimile and static presentation processing

Static presentation processing

Attribute control

C358S504000, C358S518000, C358S521000, C347S019000, C382S167000

Reexamination Certificate

active

06864995

ABSTRACT:
There are disclosed gradation correction curve producing method and apparatus for producing a gradation correction curve for correcting a gradation of an image. Density of monochromatic density patches for C, M, Y is measured to determine a first gradation correction curve, and colorimetry of gray density patches consisting of a combined color of C, M, Y is performed to determine a second gradation correction curve for each monochrome of C, M, Y determined from colorimetry values. A gradation correction curve for each monochrome of C, M, Y for gradation correction is determined using the first gradation correction curve and the second gradation correction curve.

REFERENCES:
patent: 5483360 (1996-01-01), Rolleston et al.
patent: 5574544 (1996-11-01), Yoshino et al.
patent: 6026216 (2000-02-01), Ohtsuka et al.
patent: RE38180 (2003-07-01), Edge
patent: 6668077 (2003-12-01), Ohkubo

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