Canon CanoScan N650U User Manual - Page 53

Business Card, Statement, Executive, Letter, Full Platen, Paper Size, Descreen, Unsharp Mask

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chapter 4 What is on the Screen? Top Page Glossary Contents Index Paper Size Specifies from the drop-down list the paper size of the image to be scanned. • Business Card • Statement • B5 • Executive • Letter • A4 • Full Platen Changing the Paper Size clears the Preview area and clears all settings you have performed with the Toolbar Note or the buttons on the Tone sheet buttons. Descreen Click this check box if you want ScanGear CS-U to conduct moiré reduction to improve the overall image quality. Moiré are dot patterns that interfere with processing images for professional use and are usually caused by poor dithering resulting from scanning images from newspapers, books, magazines, etc. Unsharp Mask Click this check box to switch the Unsharp Mask feature on and off. Sharpens an image, like a photograph that is slightly out of focus, by emphasizing the contrast to make outlines more clear. • When the image would not be improved with Descreen on, try to switch the Unsharp Mask Note function off. • The effects by Descreen and Unsharp Mask will not be affected in the Preview area. 53

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53
chapter 4
What is on the
Screen?
Top
Page
Glossary
Contents
Index
Paper Size
Specifies from the drop-down list the paper size of the image to be
scanned.
•
Business Card
•
Statement
•
B5
•
Executive
•
Letter
•
A4
•
Full Platen
Note
Changing the Paper Size clears the Preview area and
clears all settings you have performed with the Toolbar
or the buttons on the Tone sheet buttons.
Descreen
Click this check box if you want ScanGear CS-U to conduct moir
é
reduction to improve the overall image quality.
Moir
é
are dot patterns
that interfere with processing images for professional use and are usually
caused by poor dithering resulting from scanning images from
newspapers, books, magazines, etc.
Unsharp Mask
Click this check box to switch the Unsharp Mask feature on and off.
Sharpens an image, like a photograph that is slightly out of focus, by
emphasizing the contrast to make outlines more clear.
Note
•
When the image would not be improved with
Descreen on, try to switch the Unsharp Mask
function off.
•
The effects by Descreen and Unsharp Mask will not
be affected in the Preview area.