Canon mp495 - Manual (Page 517)

Reducing graininess
Set Grain Correction to Low, Medium or High according to the degree of graininess.
None Medium
Correcting backlit images
Set Backlight Correction to Low, Medium or High according to the degree of backlight.
None Medium
Correcting shadows that appear between pages when scanning open booklets
Set Gutter Shadow Correction to Low, Medium or High according to the degree of shadows.
None Medium
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Page 517 of 759 pages Correcting Images (Unsharp Mask, Reduce Dust and Scratches, Fading Correc...