The GIMP and the Sharpen Filter


Filters Sharpen

I'm in the process of moving from my addiction to Macromedia Fireworks to The GIMP. Why? Well for one thing I really don't have the finances as a lowly uni student to buy new licences all the time, not to mention the uncertain future of the aformentioned program after Macromedia was bought out by Adobe, and the fact that Fireworks isn't a universal binary yet… plus there's that warm fuzzy feeling you get when you use Open Source software ;).

This is how you use the GIMP's Sharpen Filter according to the web based documentation:

This filter is found in Image>Filters/Enhance/Sharpen

Most of digitized images need correction of sharpness. This is due to digitizing process that must chop a colour continuum up in points with slightly different colors: elements thinner than sampling frequency will be averaged into an uniform colour. So sharp borders are rendered a little blurred. The same phenomenon appears when printing colour dots on paper.

The Sharpen filter accentuates edges but also any noise or blemish and it may create noise in graduated colour areas like the sky or a water surface. It competes with the Unsharp Mask filter, which is more sophisticated and renders more natural results.

I use on Mac OS X, and regular GIMP on my FreeBSD box.

Favourite this blog on Technorati! gimp, the gimp,, gimpapp, sharpen filter, mac os x, open source, macromedia, fireworks, macromedia fireworks, universal binary

Author bio and support


Ruben Schade is a technical writer and infrastructure architect in Sydney, Australia who refers to himself in the third person in bios. Hi!

The site is powered by Hugo, FreeBSD, and OpenZFS on OrionVM, everyone’s favourite bespoke cloud infrastructure provider.

If you found this post helpful or entertaining, you can shout me a coffee or send a comment. Thanks ☺️.