Chromatic Aberrations

Free mitigation software

RawTherapee - on GitHub

Despite the name, also works on e.g. JPEG files.
A beginner’s guide
can use Lensfun profiles, but also custom .pp3 and .lcp profiles... - Creating processing profiles

Darktable

More modern UI than RawTherapee, but IMO too invasive - wants to manage all images...

Hugin

tca_correct estimates correction parameters, but documentation sucks

• -o optvar options abcvde are not explained
• However, Lensfun describes Hugin's fourth order polynomial model:
    Rd = a * Ru^4 + b * Ru^3 + c * Ru^2 + v * Ru
• supported file types are not enumerated
• JPEG are accepted, but as warned,
  "trying to correct chromatic aberration of a JPEG photo is a big waste of time".

fulla applies those corrections
median correction parameters from an image series
tca_correct can be used to generate custom Lensfun profiles e.g. for RawTherapee

Lensfun on GitHub

Lens Calibration

Picture Window Pro has manual chromatic aberration color fringing correction

that works on JPEG images.

related downloads

- CA settings can be saved and applied to subsequent images.

corrCA - C++ chromatic aberration correction tool based on calibration

calibration target similar to negative of a microscope calibration slide:

Transverse chromatic aberration image correction by color plane warping.
Precise (largely sub-pixel) color channel realignment by:
- high precision disk center detection in each color plane
- fit to radial polynomials.
Setup uses a single snapshot of black disks pattern on white.
Quantitative measurements on real images show that this method allows
- 0.05 pixel color channel average misalignment
- residual color error reduced by a factor 3 to 6.
GitHub - paper - Contact