Attached is a small fragment of a tiff file; it has a large number of speckles, which I'd like to remove. The natural tool would seem to be Despeckle, but it doesn't seem to do the job. In fact, as far as I can see, it doesn't do anything.

What's the right tool to use? Or maybe I'm not using Despeckle right.

Any help much appreciated - jon

On Thu, 2009-12-03 at 14:39 +0100, Claus Cyrny wrote:

I would recommend you to donwload & install the 'GREYCstoration' plug-in
from the Gimp plug-in page. It does a much better job than the Gimp's own 'Despeckle'
filter. After installing it, you can find the plug-in under

'Filters > Enhance > GREYCstoration...'

For a start, I would set 'Strength' to maybe 25 or so & leave the other options as they are.

Thanks very much for the pointer. I went to the link you mentioned, which advised me:

This plug-in has been superseded by the G'MIC plug-in for GIMP

I have downloaded G'MIC and unzipped it, but it's not clear how to install it. I would guess that it should simply be copied to /usr/lib64/gimp/2.0/plug-ins, but this procedure doesn't seem to be documented anywhere. Or maybe it's better to copy it to $HOME/.gimp-2.6/plug-ins . Or maybe something else.

The most promising looking tool, gimp-plugin-mgr, produces an error:

$ gimp-plugin-mgr --install gmic_gimp gimp-plugin-mgr: can't read /etc/gimp/plugins.d/gmic_gimp.conf

It's a good idea to check before charging ahead.

BTW: How carefully are the plugins in the Gimp Plugin Registry checked for trojans, etc?

Thanks - jon