Image Processing Reference
In-Depth Information
250
200
Cyan TRC
150
100
50
0
0
50
100
150
200
250
C
in
FIGURE 8.6
Cyan gray-balanced TRC.
250
200
Magenta
TRC
150
100
50
0
0
50
100
150
200
250
M
in
FIGURE 8.7
Magenta gray-balanced TRC.
8.5.3 T
WO
-D
IMENSIONAL
C
ALIBRATION
One-dimensional calibration is limited to color balancing the printer to one of the color
axes or to achieve a linearized
D
E
a
*
response with respect to paper. Achieving both
simultaneously with TRCs is not simple. A full 3-D function with input C
in
, M
in
,
and Y
in
to output C
out
, M
out
, and Y
out
is being applied in many color management
systems as an alternative to 1-D calibration. In this case, the three 3-D TRCs (or
LUTs) would be
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