COPYRIGHT © 2005 CANON ELECTRONICS INC. CANON DR-2580C FIRST EDITION APR. 2005
2-19
CHAPTER 2 FUNCTION & OPERATION
c) Custom Adjustment
This is used when data conversion
other than brightness and contrast
adjustments is required.
It is possible for the user to use a
custom conversion table for converting
the gamma curve to the document
image data. In this case, the bright-
ness and contrast adjustments be-
come invalid, and the unique gamma
curve is given priority.
YH
White
(255)
White
(255)
Black
(0)
Y0
YL
X0
(+)
(-)
After con
v
ersion
Before conversion
Figure 2-508
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