Toshiba e-STUDIO4500c - Adjustment Reference for Gamma Correction

IMAGE ADJUSTMENTS August, 2006
3-190
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 1 2 3 4 5 6 7 8 9 10
600 x 600 - 1 3 5 6 9 10
11
16
-
1800 x 600 - 1 3 5 6 8 10
11
16
-
Photo
1200 x 1200
- 1 3 4 6 8 10
12
15
16
600 x 600 - 1 3 5 6 9 10
11
16
-
1800 x 600 - 1 3 5 6 9 10
12
16
-
K
Test
sheet
Text
1200 x 1200
- 1 3 5 6 9 11
12
15
16
C-4 test chart
1 2 3 4 5 6 7 8 9 10
600 x 600 - 1 3 5 6 9 10
12
13
14
1800 x 600 - 1 3 5 6 8 10
11
12
13
Photo
1200 x 1200
- 1 3 4 5 8 10
11
12
13
600 x 600 - 1 3 4 5 8 10
11
12
13
1800 x 600 - 1 3 5 6 9 10
11
12
14
C
Test
sheet
Text
1200 x 1200
- 1 3 4 5 9 10
11
12
13
C-4 test chart
1 2 3 4 5 6 7 8 9 10
600 x 600 - 1 4 6 8 11
12
14
16
-
1800 x 600 - 1 4 6 8 11
12
15
16
-
Photo
1200 x 1200
- 1 4 6 7 10
12
14
16
-
600 x 600 - 1 4 6 7 10
12
14
16
-
1800 x 600 - 1 4 6 8 11
13
14
16
-
M
Test
sheet
Text
1200 x 1200
- 1 4 6 7 10
12
13
16
-
C-4 test chart
1 2 3 4 5 6 7 8 9 10
600 x 600 1 3 4 9 11
12
14
15
16
-
1800 x 600 1 3 5 8 10
11
14
15
16
-
Photo
1200 x 1200
1 3 5 8 10
11
14
15
16
-
600 x 600 1 2 5 8 10
11
14
14/
15
15
16
1800 x 600 1 3 6 9 10
12
14
15
16
-
Y
Test
sheet
Text
1200 x 1200
1 2 4 7 9 10
13
15
16
-