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IMAGE PROCESSING
(4) Color Conversion
A matrix converts the RGB video signals from each scanning cycle into YMCK
video signals. The content of the matrix depends on the selected mode. The
transparency for each color toner is not ideal, as shown above. Color conversion
compensates for the difference between ideal and actual characteristics.
The following modes affect the matrix: color conversion mode (this is a user mode,
not to be confused with the color conversion process described in this section),
pastel mode, color balance mode, original mode (press print glossy photo, 2nd
generation), RGB toner correction mode.
The following color conversion table is an example of the results from the matrix
operation, for simple color copying without any special modes applied. For
example, to represent green, the yellow and cyan toners are used in a proportion
of 1:1.
Original
Color
K
Toner
Y
1
M
1
C
1
K
1
If the user selects a special mode, some of the values in this table may be between
0 and 1. The following page briefly explains the effects of some modes.
R
Y
1
1
1
0
0
0
0
0
Color Conversion Table
2-46
A259D516.WMF
G
C
1
0
0
0
1
1
0
0
24 February, 1999
B
M
0
0
1
1
1
0
0
0
W
0
0
0
0
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