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Software Photoshop, Lightroom, Paintshop Pro, Painter, etc., and all their various plugins. Of course, you can also discuss all other programs, as well.

SharpControl - Free PC Software

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Old 01-04-2003, 05:44 PM
Stephen M Stephen M is offline
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Join Date: Apr 2002
Location: Sydney, Australia
Posts: 439
Some more thoughts after playig with the new version...

Amount & Radius - Setting amount to 1000% with all other features at 0 (zero) or full strength sharpen - adjust the radius until you see an effect. For me this happens after 0.5 radius. It seems that radius intensifies quickly after that setting?

Control - higher settings seem to reduce the light halo and to also perform some sort of edge smoothing, as well as working a bit like threshold?

Edge - The high edge value will mask lower frequency areas like skintones seems to work well in conjunction with control, both using lower settings. This may also work like threshold to some degree.

Iterations - be careful, multiple sharpening should be performed using lower amounts and or other settings, as they obviously build up (weird photo art results happen after using too many interations with higher settings).

As with all sharpening, you may prefer to set amount really high and back off the other values - so you can see a really horrid oversharpened image in all the wrong places. Then slowly back down on the other variables until there is a reasonable trade off between sharpness and noise suppression.

Clipboard Data Paste - for 8 bpc data into SC, there seems to be MS Win clipboard issues for large files, so if the file is big you may have to use the open command in SC.

Clipboard Data Copy - a big file can be copied out of sharp control through the clipboard and pasted as a layer direct in Photoshop. So it seems the clipboard issues may be one way.

This approach can be quite in SC, tweak and copy and paste into Photoshop to compare at zoom levels with true colours and to compare against reg. USM quickly etc. It does not sound like there will be a plug, so this copy/paste approach seems a good work around (it almost feels like using a plug <g>).

Sliders - the setting sliders may not slide to the exact figure you would like (say 1.00 pixel radius and not 1.20 or whatever). Ballpark the setting and quit SC. The settings text file in the same folder as the app can now be changed to the setting you require, next time SC is opened it will read this text file and use those figures.

Colour Management - this app is not ICC savvy so Adobe RGB files or whatever will look desaturated as the numbers in the file do not make sense when sent direct to the monitor.

Just forget that the preview colour is weird in SC, the data should be the same when it is taken back to Photoshop. Don't change any pixel values in the file and it should match the original for general colour.

Any corrections or additions? As there is no homepage it might be good to list some user experiences and tips.

Stephen Marsh.

Last edited by Stephen M; 01-04-2003 at 06:00 PM.
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Old 01-04-2003, 06:57 PM
jeaniesa's Avatar
jeaniesa jeaniesa is offline
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Join Date: Aug 2001
Location: Colorado foothills
Posts: 1,826
David, Thanks for the example. It looks like there was a good amount of sharpening without a halo. Impressive.

Stephen, Thanks so much for your detailed "thoughts after playing"! I'm going to go download this now...

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Old 01-25-2003, 12:50 AM
Stephen M Stephen M is offline
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Join Date: Apr 2002
Location: Sydney, Australia
Posts: 439
Small tutorial on sharpcontrol here:


Stephen Marsh.
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Old 02-05-2003, 07:50 AM
Stephen M Stephen M is offline
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Join Date: Apr 2002
Location: Sydney, Australia
Posts: 439
v1.1 is still the current stand alone version of SharpControl, although this new thread:

...introduces a new app from the same author - which has the next generation of SharpControl built-in as one feature among others. This new tweak allows a min sharpening halo radius of 0.34 pixels, where as SC1.1 has a 0.51 pixel minimum.

With luck a new version of Sharp Control will offer the interface and processing improvements offered in the new PhotoControl.

Stephen Marsh.
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