Contex GX67D - Set the Scan Mode Parameters - Level or Gamma

Using the scanner, how do I …? 6-6
6.2.3 Set the Scan Mode Parameters – Level or Gamma
On the iJET Panel –
1. When you pressed
Enter
to accept the Scan Mode, the “>” marker moved back up to the
option text “Scan Mode”.. From here you can set the current Scan Mode parameter.
2. Press the arrow down button
to move to the Scan Mode’s parameter option and then
Enter
to indicate you want to change it. If you selected B&W Threshold, B&W Adaptive or
B&W Copy Adaptive, the parameter option will be Level. If you selected Graytone or Color, the
parameter option will be Gamma. Use the guidelines in the table below to make your setting.
Scan Mode Adjustment – what it does
B&W Threshold Level in this scan mode is the threshold value. Values between 0-255. The default is
151. When scanning at a specific threshold value, all gray tones below the threshold
will be represented as black pixels, and all gray tones above will be represented as
white pixels.
B&W Adaptive
B&W Adaptive Level works like a threshold - the lower the value, the more of the
background is picked up during scanning. Values between 0-255. Default is 0.
B&W Copy Adaptive
B&W Copy Adaptive Level works like a threshold - the lower the value, the more of
the background is picked up during scanning. Adaptive enhancement features are
automatically applied in this copy mode, with simultaneous processing on different
image aspects. You only have to adjust the adaptive "Level" to determine the best
degree of enhancement processing for your specific image. Values between 0-255.
Default is 0.
Graytone Gamma – Values between 0.1 and 3.0. Default is 1.0. Pixels are intensified
according to a gamma curve they are mapped to. A low gamma value smaller than
1.0 darkens the output while a high gamma value larger than 1.0 typically lightens
the shadow areas and brings out detail.
24-bit Color
Gamma– Values between 0.1 and 3.0. Default is 1.0. Pixels are intensified
according to a gamma curve they are mapped to. A low gamma value smaller than
1.0 darkens the output while a high gamma value larger than 1.0 typically lightens
the shadow areas and brings out detail.
3. Press the arrow up/down buttons to change the value displayed.
4. Press
Enter
to accept the new parameter value for the current Scan Mode The “>” marker
moves back up back up to the Scan-to-File Menu level. From here you can move on and make
more Scan-to-file menu settings.
Press
Enter
to indicate you want to change the
value. The > marker will move down..
Gamma
> 1.00
Press
Enter
to accept the parameter value.
> Gamma
0.70
Press
Enter
to accept the Scan Mode. The “>
“marker moves back up.
> Scan Mode
Graytone