Ae Adjustment - Oce 3121 Technical & Service Manual

9 AE adjustment

The AE ' auto density adjustment ' mode may be either ' priority on speed '
or ' priority on image quality '. Each of these modes may be adjusted in service
mode. The concepts used for the modes are as follows:
Priority on speed mode
Use 'ABC_TBL ', under 'ADJUST '. In service mode ( ' * 3 * ' ).
A lower value for ' ABC_TBL ' will make the image darker. (value 1 ~ 9).
I
A higher value for ' ABC_TBL ' will make the image lighter. (value 1 ~ 9,
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default = 3).
The adjustment will modify the density correction curve.
C opy densi t y
W hi t e
Bl ack
Bl ack
' Priority on image quality ' mode
' AE_SLOP '
1
For ' priority on image quality ' an AE table is selected, based on a computa-
tion of the density histogram which is prepared during a pre-scan. The slice
level, distinguishing the data into text (black) and background (white), can be
adjusted under ' AE_SLOP '. In service mode ( ' * 3 * ' , ' ADJUST ' ).
' AE-SLOP ': A higher setting makes the image darker. (value 1 ~19).
30 TSM Océ 3121
H i gher set t i ng Low er set t i ng
O r i gi nal densi t y
W hi t e
Image quality