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IMAGE ADJUSTMENTS
Adjustment Reference For Gamma Correction
The following tables show the adjustment reference for gamma correction. The
tables show the level of the color scale on the C-4 test chart and on the tone
control test sheet printed in the printer SP mode. For example, for K at text mode,
grade 12 on the tone control test sheet should be the same as grade 7 on the C-4
chart.
Normally, it is not necessary to adjust the gamma data as shown in the table since
ACC adjusts the gamma curve automatically. The fine-tuning of color balance by
gamma data adjustment is necessary only when the results of ACC and Color
Calibration do not meet customer requirements.
C-4 test chart
Photo
K
Test
sheet
Text
C-4 test chart
Photo
C
Test
sheet
Text
C-4 test chart
Photo
M
Test
sheet
Text
C-4 test chart
Photo
Y
Test
sheet
Text
1
600 x 600
-
1800 x 600
-
1200 x 1200
-
600 x 600
-
1800 x 600
-
1200 x 1200
-
1
600 x 600
-
1800 x 600
-
1200 x 1200
-
600 x 600
-
1800 x 600
-
1200 x 1200
-
1
600 x 600
-
1800 x 600
-
1200 x 1200
-
600 x 600
-
1800 x 600
-
1200 x 1200
-
1
600 x 600
1
1800 x 600
1
1200 x 1200
1
600 x 600
1
1800 x 600
1
1200 x 1200
1
3-190
2
3
4
5
1
3
5
6
1
3
5
6
1
3
4
6
1
3
5
6
1
3
5
6
1
3
5
6
2
3
4
5
1
3
5
6
1
3
5
6
1
3
4
5
1
3
4
5
1
3
5
6
1
3
4
5
2
3
4
5
1
4
6
8
1
4
6
8
1
4
6
7
1
4
6
7
1
4
6
8
1
4
6
7
2
3
4
5
3
4
9
11
3
5
8
10
3
5
8
10
2
5
8
10
3
6
9
10
2
4
7
9
August, 2006
6
7
8
9
9
10
11
16
8
10
11
16
8
10
12
15
9
10
11
16
9
10
12
16
9
11
12
15
6
7
8
9
9
10
12
13
8
10
11
12
8
10
11
12
8
10
11
12
9
10
11
12
9
10
11
12
6
7
8
9
11
12
14
16
11
12
15
16
10
12
14
16
10
12
14
16
11
13
14
16
10
12
13
16
6
7
8
9
12
14
15
16
11
14
15
16
11
14
15
16
14/
11
14
15
15
12
14
15
16
10
13
15
16
10
-
-
16
-
-
16
10
14
13
13
13
14
13
10
-
-
-
-
-
-
10
-
-
-
16
-
-
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