2
2
2-13
2-13
Technology > Controls (Reader)
Technology > Controls (Reader)
■
Color offset correction in sub scanning
When R, G and B are not accurately synchronized in sub scanning, the color offset correction
will be made so that RED and BLUE synchronize with GREEN by shifting RED and BLUE
image within single pixel in the sub scanning direction.
Example)
For GREEN, RED offsets upward and BLUE offsets downward in the scan for black line
image.
Color offset in
sub scanning
R-G
1 line
Before correction
After correction
Color offset in
sub scanning
G-B
MEMO:
Outstanding point of this CCD unit:
• Corrective values are different by the position in the main scanning.
There are 12 corrective values in the book scan and 4 values in the ADF scan for the color
offset correction. The color offset corrections have been made at the factory and all the
corrective values have been stored in the service mode. (In COPIER > ADJUST > CCD)
At the beginning of job, color offset correction is performed based on the stored corrective
values.
Book scan
ADFADF scan
100%
50%
100%
50%
Main scanning position 0
(rear)
100-RG
100-GB
50-RG
50-GB
100DF-RG
100DF-GB
50DF-RG
50DF-GB
Main scanning position 1
(center)
100-RG-2
100-GB-2
50-RG-2
50-GB-2
Main scanning position 2
(front)
100-RG-3
100-RG-3
50-RG-3
50-GB-3
F-2-23
T-2-6
