Canon MG5500 series Online Manual page 98

It is recommended that you normally select this setting.
• High
Select this when the effect level is too weak with the medium setting.
Important
Do not place objects that weigh 4.4 lbs (2.0 kg) or more on the platen. In addition, do
not press on the item with a force exceeding 4.4 lbs (2.0 kg). If you press heavily, the
scanner may not work correctly or you might break the glass.
Align the item with the edge of the platen. If placed slanted, correction will not be
applied properly.
Correction may not be applied properly depending on the item. If the page
background is not white, shadows may not be detected correctly or may not be
detected at all.
While scanning, press down on the spine with the same amount of pressure you
used to preview the scan. If the binding part is not even, correction will not be applied
properly.
How to place the item depends on your model and the item to be scanned.
• Unsharp Mask
Emphasizes the outline of the subjects to sharpen the image.
• Descreen
Reduces moire patterns.
Printed materials 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.
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