Facsimile and static presentation processing – Static presentation processing – Attribute control
Reexamination Certificate
2005-06-28
2005-06-28
Lee, Thomas D. (Department: 2624)
Facsimile and static presentation processing
Static presentation processing
Attribute control
C358S519000
Reexamination Certificate
active
06912064
ABSTRACT:
In order to accurately correct environmental variation and aged variation of gamma characteristics, RGB tone data are color-converted to be formed as CMYK tone data, then a tone correction for improving gamma characteristics is performed on the CMYK tone data. The CMYK tone data after the tone correction are subjected to half-toning to be converted into half-tone data. On the basis of the half-tone data, an image is printed by an electrophotography process. A test image is printed at a predetermined timing. A sensor reads the test image. On the basis of a signal of the sensor, a correction table for the tone correction is calculated by correction table calculation. In the tone correction, 8-bit input tone data are converted into 10-bit corrected tone data. Since the tone correction is performed on CMYK data in place of RGB data and the bit number of tone data is extended from 8 bits to 10 bits by the tone correction, the accuracy of improvement of gamma characteristics is enhanced.
REFERENCES:
patent: 4347523 (1982-08-01), Ohara
patent: 4858023 (1989-08-01), Tada
patent: 5325153 (1994-06-01), Mitsuse et al.
patent: 5374996 (1994-12-01), Eguchi et al.
patent: 5469267 (1995-11-01), Wang
patent: 5550647 (1996-08-01), Koike
patent: 5732151 (1998-03-01), Moon et al.
patent: 5838465 (1998-11-01), Satou et al.
patent: 5854882 (1998-12-01), Wang
patent: 6014462 (2000-01-01), Yamakawa
patent: 6055071 (2000-04-01), Kuwata et al.
patent: A2 0 794 656 (1997-09-01), None
patent: A2 0 840 497 (1998-05-01), None
patent: 3-271764 (1991-12-01), None
patent: 4-213470 (1992-08-01), None
patent: 7-264412 (1995-06-01), None
patent: 8-69210 (1996-03-01), None
patent: 10-32713 (1998-02-01), None
Brinich Stephen
Lee Thomas D.
Seiko Epson Corporation
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