Apple Color OneScanner 600/27 - Manual (Page 88)

Sharpening an image
You may notice that the edges of an image are softer than you want them to
be. Or, you may want to soften edges that look too sharp.
To sharpen an image:
m
Choose a command from the Sharpen submenu in the Image menu.
Commands in the Sharpen submenu add definition to an image. If an image
looks softer than you want it to look, the Sharpen commands may help. You
may not notice much difference on the screen.
A Little Has an almost imperceptible effect.
A Lot Has a significant effect.
Unsharp Masking Opens the Unsharp Masking dialog box:
Options in the Unsharp Masking dialog box adjust the contrast of image
details to create the illusion of a sharper image.
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