How does an unsharp mask work?

Posted by Bob Aman on Stack Overflow See other posts from Stack Overflow or by Bob Aman
Published on 2010-05-30T10:03:01Z Indexed on 2010/05/30 10:12 UTC
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algorithm

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graphics

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image-processing

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unsharp-mask

I've been playing around with image processing lately, and I'd like to know how the unsharp mask algorithm works. I'm looking at the source code for Gimp and it's implementation, but so far I'm still in the dark about how it actually works. I need to implement it for a project I'm working on, but I'd like to actually understand the algorithm I'm using.

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