Canon MX870 Series User Manual page 716

Newspaper
Applies Image Adjustment suitable for newspapers.
Document
Applies Image Adjustment suitable for text documents.
Important
You can set Image Adjustment after preview.
You can set this setting when Recommended is selected on the Color Settings tab of the
Preferences dialog box.
Note
If the image is not adjusted properly with Auto, specify the document type.
The color tone may change from the source image due to the Image Adjustment. In that case, set
Image Adjustment to None.
Reduce Show-through
Use this function to reduce show-through in duplex documents or lighten the base color in recycled
paper and other colored paper when scanning from the ADF (Auto Document Feeder).
None
Show-through will not be reduced.
Low
Select this to reduce show-through in duplex documents or lighten the base color. It is
recommended that you normally select this setting.
High
Select this when show-through is apparent. This can affect the tone of the image.
Unsharp Mask
When this is set to ON, the outline of the subjects is emphasized to sharpen the image.
Descreen
Printed photos and pictures are displayed as a collection of fine dots. "Moire" is a phenomenon where
uneven gradation or a stripe pattern appears when such photos or pictures printed with fine dots are
scanned. Descreen is the function for reducing this moire effect.
Note
Even if Descreen is set to ON, some moire effects may remain if Unsharp Mask is set to ON. In
that case, set Unsharp Mask to OFF.
Selecting Magazine(Color) in Select Source in Basic Mode tab has the same effect as setting
Descreen to ON in Advanced Mode tab.
Reduce Dust and Scratches
Scanned photos may contain white dots caused by dust or scratches. Use this function to reduce such
noise.
None
Dust and scratches will not be reduced.
Low
Select this to reduce small dust particles and scratches. Large ones may remain.
Medium
It is recommended that you normally select this setting.
High
Select this to reduce small/large dust particles and scratches. Evidence of the reduction process
may remain and may also remove delicate parts of the image.
Important