Image processing apparatus and image forming apparatus

Details Image processing apparatus and image forming apparatus Image processing apparatus and image forming apparatus

2007-05-22

2007-05-22

Grant, II, Jerome (Department: 2625)

Facsimile and static presentation processing

Static presentation processing

Attribute control

C358S002100, C358S500000

Reexamination Certificate

active

10944897

ABSTRACT:
A color conversion section converts R-, G- and B-image signals input by the reading of a color image on an original to C-, M- and Y-color signals. A histogram producing means of an image processing section produces density histograms of the respective color signals on the basis of the converted C-, M- and Y-color signals. An original type determination means determines a type of the original on the basis of the histogram data signals. A colored background determination means determines a colored background on the basis of the histogram data signals. A background process presence/absence determination means determines whether a background process is to be executed or not, on the basis of an original type determination result signal and a colored background determination result signal. A CPU produces, when it is determined that the background process is to be executed, a background process table using the density histogram values of the respective color signals. A density adjustment means performs density adjustment of the respective color signals input from the color conversion section, on the basis of the background process table.

REFERENCES:
patent: 6204873 (2001-03-01), Shimazaki
patent: 6567544 (2003-05-01), Kanno et al.
patent: 6631209 (2003-10-01), Kanamori
patent: 11-187266 (1999-07-01), None
patent: 2000-83166 (2000-03-01), None

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