[Gimp-user] API-access to the new shadow and highlights feature?

[rich404 <forums gimpusers com>]

> Hi everyone, this is my first post on GIMP forums, so please move if
> this is in
> an inappropriate category.
>
> I work a lot with Gimp, and I especially enjoy the new Shadows and
> Highlights
> feature which can be found under Colors when right-clicking an image.
> I mainly
> use Gimp to preprocess data for machine learning applications - which
> means,
> we're talking HUGE amounts of images, like 255,000 .jpg files.
> Therefore, it is
> an absolute necessity for me to rely on batch-processing. I already
> wrote
> scripts for saturation and contrast, brightness, etc., but as for now,
> I cannot
> seem to find an a procedure to programmatically set the
> Shadows-and-Highlights
> parameters.
>
> Has anyone done this before? Is there a procedure or API-Link to do
> this?
>
>
> Any help is greatly appreciated :) Cheers! 
>
> https://docs.gimp.org/2.10/en_US/gimp-filter-shadows-highlights.html

It is a GEGL operation and not scriptable (as yet) as a Gimp 
script-fu/python-fu

For GEGL functions you can check, as example:
http://gegl.org/operations/gegl-shadows-highlights.html

For lots of files you need (1) an up-to-date GEGL installed (2) a bash/batch
file to run the command.

You can always check the syntax of the command in Gimp. Use the "/" search +
gegl to find gegl-graph, then enter the parameters.

screenshot attached.

Attachments:
* https://www.gimpusers.com/system/attachments/1251/original/gegl-graph.jpg

-- 
rich404 (via www.gimpusers.com/forums)