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Saturation Equalizer

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Saturation equalizer is saturation plugin that can adjust saturation of an image via 6 sliders – effectively the saturation curve. You can alo modify brightness of image with two spinboxes – they work like „levels“ tool.
Additionally you can autoalign RGB channels to eliminate color cast and there are few more features. I believe they are self-explanatory, once you work with plugin.
It internally works in floats, that means no information is lost during processing.
Plugin is multithreaded.

To learn more visit homepage (with examples):

Feedback welcomed.

GIMP Version: 
Code License: 


Hi, I posted v 0.7.2 here. No more images to deal with, data are now in *.h files and compiled into binary, so installation is as easy as before

Hi, I have new version of my plugin. If I ignore development versions (not published here) changes are
- multithreading
- sliders coupling (you draw one slider, other follows in some distance)
- masks (Not related to saturation, but it seems usefull to me)
- preserve color (hue) button - It limits saturation boost of a pixel, if some of RGB values is to get out or range (and be cropped and this way it would change color (hue) of pixel)
- resizeable (expandable) preview
- GUI reworked (was necessary as there are much more options now)

Lately Im thinking if the plugin doesnt became too bloated. But as I have no feedback in this regard from users, I follow the rule "What is good to me, is also good for others". :)

So enjoy this my little work and whatever you have to say to me, dont hesitate....



89 039 bytes.

For the icons in the plugin, place the directory "satequalizer" which contains 4 images png in C:\
(result C:\satequalizer)

Thanks Tibor for the update and samj for the windows compile. Much appreciated. :)

Thanks again! Really useful ideas (sun filter, slider coupling and of course expandable preview)!
One curious issue: the sliders are not in line, but are slightly ascending to the right :)

Thanks for positive feedback, owl_2 (and lylejk as well).
To your question about ascending sliders.. yes, but this is rather side effect of a feature than bug. My idea is that less saturated areas would have bigger upper limit for saturation boost - in plain language, maximum value of sliders differs -move them to the top and see values above them.

Of course, this detail whether all sliders have to have the same max values, or more important question - what should be maximum values of sliders are quite subjective... The numbers came to existence when I started coding this plugin and needed some numbers to put there. And then I just did not feel any need to change them.

You were fast, thanks.

But is it necessary for a user to MANUALY create that directory and copy those png there? In linux any package manger can take care on this and place any files anywhere - unless there is a conflit - f.e. if it tries to overwrite existing files.... I cant believe that windows cant do this...

But I just want to emphasize that plugin will work withouth those images, just user will see only "broken image" placeholders instead...

Uable to create c:\satequalizer. I'm not allowed to create a rootdir because I'm no admin. Can you modify it to the Gimp-plugins directory??


@ E. Sullock Enzlin
I'll see if I can modify the source code to no longer use the absolute addressing.

@ Tibor95
It would be a good idea to use relative addressing for images directory.
The user just needs to drag the folder from the archive with the file explorer .


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