In my previous Luminosity Masks script (david2_lum_mask.py) I added a routine to equalize the channel used for creating masks, so that it would be more effective for low-contrast images. But there was still a problem in that the middle channels covered a wide part of the brightness spectrum and the successive lighter and darker channels became narrower and narrower.

In my latest experimental version I have added a curve to largely eliminate the difference in "spread" between the channels. (Only 8 channels at present)

The new version is: davidx_lum_mask.py. It will be found under "Python-Fu" as "Davidx Luminosity Masks...".

I would have been unable to create this without the help of Ofnuts sorting out my problems and of course not forgetting Tim who programmed the original python routine for me.

I hope people will download this, try it, and give me feedback as to its usefullness.

david.

I have done a major revision of my experimental Luminosity Mask plugin in the first post of this thread (davidx_lum_mask.py).

The new version is



It now has the option to select 4, 6, 8, or 10 masked layers. It deletes the temporary channels as soon as they are no longer required - hopefully reducing the memory requirements. It still retains the equalisation to increase its usefulness for low-contrast images and the curve to equalize the spread of brightness in the masks. The layer names have become more sensible!

Feedback and suggestions are most welcome.

david.

EDIT: 5 September 2020. I have modified the script to remove any pre-existing selection which would cause problems in use.
Moved the spline curve before the desaturation of the mask creation layer.
Latest version is above.