On Wed, 05 May 2010 11:29:02 +0100, Invisible wrote:

> Trying to sharpen the image just amplifies the JPEG compression, sadly.

Depends on the tools; I've seen a tool for GIMP called "refocus-it" that 
actually does a very good job.  With practice, an unsharp mask or NL 
filter can do pretty good with them as well, from what I've seen (I've 
not practiced that as much).

Jim

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