Hey All.
I would like to ask about techniques, that could be used to achieve separate saturation in GIMP like it could be done in photoshop. I am talking about separate shadows or highlights saturation, saturating through generated saturation mask or some similar ways to go.
I would appreciate your help.
Did you have an example or tutorial where this is being done for us to compare the method to? That may help us understand a little better what you want to accomplish.
Hello, perhaps the Color grading filter in the Colors section of G’MIC does what you are looking for. Install the G’MIC plug-in for GIMP if you haven’t done that already (on Linux that package is called gimp-gmic or gmic-gimp).
Off the bat, I would say use luminosity masks. @patdavid has the links for a script which makes that easy peasy.
Would be nice for photographers if GIMP shipped that, along with chroma (hue) and chromaticity (saturation) modes.
…I get a bit uneasy every time I see GIMP get drawing features (i.e. developers spend time adding stuff) which IMHO better belong in Krita while photographers are left with having to work in RGB space…
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One thing that I was asking about is layer blending options in photoshop, when you can localize layer adjustment on shadows/midtones/highlights by moving sliders.
As for saturation mask, here is tutorial http://luminous-landscape.com/restore-those-clipped-channels/
And here is another method:
Another way to make a Saturation mask:
Selective Color Adjustment Layer:
Absolute mode.
For each color channel drive the black slider all the way left.
For each Neutral (White, Black, Gray) drive the black slider right.
Make a mask from one of the channels, then delete the Sel Col layer.
Yep, these are basically masks based on various parameters (saturation in the case of that article). You can create a mask from just about anything you want in GIMP. Try using the luminosity masks that @Morgan_Hardwood was talking about to see if they fit your workflow a bit.