Computer graphics processing and selective visual display system – Computer graphics processing – Attributes
Reexamination Certificate
2005-08-02
2005-08-02
Bella, Matthew C. (Department: 2676)
Computer graphics processing and selective visual display system
Computer graphics processing
Attributes
C345S596000, C345S643000, C382S162000, C382S167000, C348S659000, C358S001900, C358S515000, C358S518000, C358S529000, C358S535000
Reexamination Certificate
active
06924819
ABSTRACT:
An image processor includes: a color conversion unit for converting an input signal to color signals of at least four colors; a gamma correction unit for performing gamma correction on the color signals; a binarization unit for binarizing the color signals through comparison with a threshold value; a superimposing unit for superimposing a color signal of at least one color but of the binarized color signals on another color signal to convert the signals to a superimposed color signal; logical operation unit for performing a logical operation previously defined for an image of three or fewer colors on the superimposed color signal; and a separator for separating color signals as an output of the logical operation unit into separated color signals of at least four colors.
REFERENCES:
patent: 4682216 (1987-07-01), Sasaki et al.
patent: 5838333 (1998-11-01), Matsuo
patent: 6404509 (2002-06-01), Kuwata et al.
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patent: 2002/0085249 (2002-07-01), Tsuda et al.
patent: 341547 (2000-12-01), None
English language Abstract of JP No. 2000-341547.
“PDL Color Rendering Compliant with Windows Environment”, published at Fuji Xerox Technical Report, No. 12, 1998.
Hiratsuka Seiichiro
Nishida Yukihiro
Bella Matthew C.
Caschera Antonio
Greenblum & Bernstein P.L.C.
Matsushita Electric - Industrial Co., Ltd.
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