Canon Color imageCLASS 8180c Software Manual page 136

■ [Descreen]
Set to [ON] when scanning printed photographs and pictures. The default setting is
[OFF].
IMPORTANT
•
You cannot set [Descreen] to [ON] if [Black and White] or [Text Enhanced] is selected in
[Color Mode].
•
Even if [Descreen] is set to [ON], some moire effect may remain if [Unsharp Mask] is also
set to [ON]. In this case, disable [Unsharp Mask].
•
[Descreen] cannot be set to [ON] when scanning from an application which will not
display the ScanGear MF dialog box. If you are scanning from the MF Toolbox without
using ScanGear MF, select [Color (Magazine)] in [Scan Mode] to activate [Descreen].
NOTE
•
Printed photographs and pictures are displayed as a collection of fine dots. If you scan
without descreen, the dots may interfere with each other and cause an unevenness of
gradation and a striped pattern in the image. [Descreen] is the function for reducing this
moire effect.
•
Selecting [Magazine (Color)] in [Select Document Type] in Simple Mode has the same
effect as selecting [Descreen] in Advanced Mode.
■ [Reduce Dust and Scratches]
Scanned photos may contain white dots caused by dust and scratches. This setting
reduces the dust and scratches on photos. The default setting is [None].
[None] No reduction of dust and scratches will be made.
[Low] Reduces small dust and scratch marks. With this setting, large dust or
scratch marks may remain.
[Medium] Normally this setting is recommended.
[High] Reduces large dust and scratch marks but evidence of the reduction
process may remain and may also remove delicate parts of the image.
IMPORTANT
•
For scanning printed materials, the [OFF] setting is recommended.
•
This setting may not be effective for some types of photos.
•
This setting is available when [Color], [Color (Documents)] or [GrayScale] is selected in
[Color Mode].
Setting Preferences and Scanning with ScanGear MF
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