Canon imageclass mf6580 ユーザーガイド

2-30

[Auto Tone]

Set to [ON] to automatically adjust the tone 
of the image. You can apply this setting 
when the preview image is displayed.

This setting is available when [Color], [Color (Documents)] or 
[Grayscale] is selected in [Color Mode], and [Color Correction] is 
set to [Recommended] or [Color Matching] in the [Preferences] 
dialog box (see p. 2-40).

[Unsharp Mask]

Set to [ON] to emphasize the outline of an 
image and make it sharper. It is effective for 
scanning photos etc., which have a soft 
focus.

This setting is available when [Color], [Color (Documents)] or 
[Grayscale] is selected in [Color Mode].

[Descreen]

Set to [ON] to reduce the distorted pattern 
(moire) when scanning printed photographs 
and pictures.

– This setting is available when [Color], [Color (Documents)] or 

[Grayscale] 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].

– A change in this setting is reflected after [Scan] is clicked.

[Reduce Dust 
and Scratches]

Reduces the dust and scratches on photos.

[None]:
No reduction of dust and scratches will be 
made.

[Low]:
Reduces only small dust and scratch marks.

[Medium]:
Normally this setting is recommended.

[High]:
Reduces large dust and scratch marks.
This may remove delicate parts of the 
image.

This setting is available when [Color], [Color (Documents)] or 
[Grayscale] is selected in [Color Mode].