Remove Chromatic Aberrations

[silc]

Dear experts,

Do you know if it's possible and if yes, how can I remove chromatic aberrations in GIMP?

Thanks for helping the newbie 

Cheers.

[rich2005]

(10-30-2017, 10:36 AM)silc Wrote: Dear experts,

Do you know if it's possible and if yes, how can I remove chromatic aberrations in GIMP?

Thanks for helping the newbie 

Cheers.

There is a (very) old plugin that you can try, fix-ca

See: http://kcd.sourceforge.net/fix-ca.php for details

The attached zip file contains both 32 bit and 64 bit compiled-for-Windows fix-ca ver. 3.02.
If using Windows 64 bit, use the 64 bit version otherwise use the 32 bit version.

When un-zipped pop the file fix-ca.exe in your Gimp profile C:\Users\your-name\.gimp-2.8\plug-ins

Just tried in a Win7 64 bit and it works there. When installed find it in Filters -> Colors -> Chromatic Aberration

Edit: Otherwise if it is something like a fringing problem try Colours -> Hue & Saturation then reduce the saturation on blue and cyan possibly on a selection to constrain the effect

example https://i.imgur.com/VRkdcss.jpg

[Ofnuts]

Real chromatic aberrations (that show mostly in corners) are best removed by a raw processor (RawTherapee, or else) because it can then occurs before demosaicing (or be taken in account while demosaicing).

As Rich says, purple fringes aren't really chromatic aberrations, and there are other cures.

[silc]

(10-30-2017, 11:02 AM)rich2005 Wrote:

(10-30-2017, 10:36 AM)silc Wrote: Dear experts,

Do you know if it's possible and if yes, how can I remove chromatic aberrations in GIMP?

Thanks for helping the newbie 

Cheers.

There is a (very) old plugin that you can try, fix-ca

See: http://kcd.sourceforge.net/fix-ca.php for details

The attached zip file contains both 32 bit and 64 bit compiled-for-Windows fix-ca ver. 3.02.
If using Windows 64 bit, use the 64 bit version otherwise use the 32 bit version.

When un-zipped pop the file fix-ca.exe in your Gimp profile C:\Users\your-name\.gimp-2.8\plug-ins

Just tried in a Win7 64 bit and it works there. When installed find it in Filters -> Colors -> Chromatic Aberration

Edit: Otherwise if it is something like a fringing problem try Colours -> Hue & Saturation then reduce the saturation on blue and cyan possibly on a selection to constrain the effect

example https://i.imgur.com/VRkdcss.jpg

Thanks!
It already solved and saved a lot of me photos

However, I have one photo where it improves, but does not solve. Perhaps the photo has no salvation....

Cheers.

---

(10-30-2017, 12:47 PM)Ofnuts Wrote: Real chromatic aberrations (that show mostly in corners) are best removed by a raw processor (RawTherapee, or else) because it can then occurs before demosaicing (or be taken in account while demosaicing).

As Rich says, purple fringes aren't really chromatic aberrations, and there are other cures.

Hi Ofnuts,

For one of my photos that GIMP is not helping, I would like to try in Rawtherapee. Could you please explain me how can I do that in Rawtherapee?

Thanks a lot!

Cheers.

[Ofnuts]

Here in the Toolbox: