Wat's the diff between sharp and unsharp?

[wind]

In photoshop, i encounter this 2 filters. Should i sharp or unsharp my image b4 printing?. And at wat setting should i set to be considered as "oversharpen"?? Regards

 

[Lennier]

Using the unsharp mask allows you greater control over the degree of sharpening that takes place.

You may want to refer to

http://www.photo.net/bboard/q-and-a-fetch-msg?msg_id=000Vtu

for more information.

 

[Flare]

Unsharp mask and sharpen are both sharpening tools. Sharpening sharpens a predefined value. UnSharp mask got its name from a darkroom technique for sharpening (weird name huh), in photoshop, unsharp mask allows a better control over the sharpening.

How sharp, is kind of depends on one's preference...