Taking the edge off

[no_connection]

Or how I lost my fringe

Ok puns aside, using old or sometime new glass can be both interesting and challenging. And sometime they give results that are very pleasing just due to their defects. But that can also have a back side with lenses showing strong abberations where you really don't want them. So I wanted to see if I could take some of the edge off the worst part.

[freeman]

nice work! I encounter this a lot with my c mount glass, you definitely knocked it down a bit.

[no_connection]

I could maybe post the fusion file if anyone wants it.

The method is pretty simple, start by making a saturation map, detect edges on that so sharp change in saturation make up the bright parts and no change becomes black.

Blur that slightly and convert to apha channel.. Use that to blend a desaturated version with the original.

That way any sharp color transisions (like fringes) gets dialed down while the overall color remains unchanged. Slow change also remains unaffected, but depends on edge size.

The same technique can also be used to bring a busy area down a notch