Plugin for special black-level to apply at greater levels

[rich2005]

(03-18-2024, 12:17 PM)robertkjr3d Wrote: ...snip.....
Some anti-vignetting tools give some control to apply similar controls to what I'm talking about.  But a custom Black-Level tool if someone knew how to create one would be cool.  Or 'Contrast-Apply' tool.
.......
Obviously I get by with 'Levels', 'Curves' and Balancing the 'Shadows-Highlights' screens.

Maybe the gimp_gmic_qt  plugin from http://www.gmic.eu - the zones filter.

   

The original inset for reference.