Canon mx860 - Manual (Page 420)

1.
Unsharp mask
The outline of small characters or thin objects can be accentuated. Select Unsharp mask ON
if you want to accentuate the outline of the scanned data.
2.
Descreen*
A printout consists of minute dots to make characters or graphs. Interfering with each dot may
result in uneven shades or a striped pattern. Select Descreen ON if you notice any uneven
shades or a striped pattern on the scanned image.
Note
Even if Descreen ON is selected, some moire effects may remain if Unsharp mask ON
is selected. In that case, change into Unsharp mask OFF.
3.
Show-through*
Characters on the back may show through when scanning a thin document such as a
newspaper. Select Show-through ON if characters seem to show through on the scanned
document.
* Not available when scanning a photo.
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