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+--- Thread: Changing saturation levels in green channel (/Thread-Changing-saturation-levels-in-green-channel)
Changing saturation levels in green channel - Coralie - 03-08-2024
Hi everyone,
I am a new user of GIMP.
As you can see in the attached picture, I am trying to remove the overpowering green lines by changing the level of saturation for the green channel only.
When I try this using the Hue-saturation window and selecting the green channel, it work but also applies it to the red and blue so I lose the information from the other channels.
I need to modify the red also, but I have no idea how to achieve this.
Any suggestions on this would be much appreciated.
Coralie
RE: Changing saturation levels in green channel - sallyanne - 03-08-2024
Maybe select the areas you want to adjust then.
RE: Changing saturation levels in green channel - Coralie - 03-08-2024
(03-08-2024, 05:33 AM)sallyanne Wrote: Maybe select the areas you want to adjust then.
Ok, how do I do this?
RE: Changing saturation levels in green channel - Ofnuts - 03-08-2024
(03-08-2024, 07:04 AM)Coralie Wrote:(03-08-2024, 05:33 AM)sallyanne Wrote: Maybe select the areas you want to adjust then.
Ok, how do I do this?
- You open the Channels tab, right click the Green channel, and Channel to selection. This creates a "soft" selection where pixels are selected in proportion to their Green content(*). An alternative is the "By Color select" tool and and set Select by: Green (instead of the default Select by: Composite) but this creates a "hard" selection.
- Then Colors > Hue-Chroma and reduce the Chroma
[attachment=11429]
(*) The advantage of these soft/proportional selections is that they don't cause visible edges between changed areas and the rest.