Episode 127: Octave Sharpening

A posting in the forum pointed me to a description of an interesting way to sharpen an image. This Octave Sharpening is useful when you have to do a lot of sharpening and want to avoid the typical halos around the edges.

The secret lies in a combination of 4 USM sharpened layers with different opacity. As in the recipe I used an amount of 5 (500% in the Other Program), threshold 0 and 0.5, 1, 2 and 4 in the different layers. The opacity was set to 100%, 50%, 25% and 12.5%. The more sharpening the less impact in the image. But the traces of harsh sharpening give a bit of a gradient to the edges in the final image.

Norman needs some information about old slide producers in Israel. Are you able to help?

And I have started to use Google Wave for episod planning. If you want to participate, drop me a line at info@meetthegimp.org . I also have some invites.
The TOC

00:30 Torrent for the first 100 shows
02:10 Grandfatherclock tutorial in writing at meetthegimp.org
03:10 Help for Norman
04:00 Google Wave
04:40 Octave sharpening
06:20 TAB hides the dialogs
06:50 Octave sharpening in action
08:00 50% Zoom for sharpening
08:10 Sharpen the 4 layers
11:20 setting the opacity
12:00 Looking at the result
13:15 Layer group workaround
14:30 Recap
17:10 Forum
17:00 Fund raising