apply a certain gradient color-sheme to a image:

[saint_m]

good day dear experts, 


in this thread - i have learned alot:  i have seen, that there  were awesome color-shemes. 

the thread: c.f.  https://www.gimp-forum.net/Thread-color-...al-example

i (we all) have learned - that we can use wonderful color shemes - such as: LCH  - Lightness, Chroma, and Hue: 

Quote:LCH stands for Lightness, Chroma and Hue. It is pretty similar to HSL but is modelled after human vision. Oftentimes, it is referred to as HCL color mode.

HCL or LCH - however you may want to call it, provides a consistent lightness of colors as perceived by human eyes. I prefer this color mode as it enables us to generate gradients with consistent lightness. Here’s an example:

cf.  https://www.prasannamestha.com/blog/scie...-gradients


well - i want o apply this on a image: - see here a shematic view: 

Code:

colorize this from left to right - with  LCH
+---------------------------------------+
|  Base-plane                           |
|   .-----o      .-----o                |
|   |      \    /      |                |
|   o       o--o       o                |
|  / \     /    \     / \               |
| o   o---o      o---o   o              |
+---------------------------------------+
-.. how to apply the gradient from left  to right

the base plane: with  a network 

what is aimed: i want to colorize this from left to right - with LCH


should i do this with - some kind of layers - where i have the gradient of the LCH stored in!?


look forward to hear from you 

regard

Saint M

[denzjos]

A simple way is to capture a gradient and use it as a layer below your text layer, or to create one yourself.

https://docs.gimp.org/3.0/en/gimp-concep...ients.html

I made a copy from the website you pointed at:

   

But I don't think you want to use a text layer? Isn't it the kind of drawing you want to create as seen in your earlier posts? I could be wrong but : I would suggest to make a drawing with paths for the lines and stroke the paths on a new transparent layer and use a brush for the points (also on a transparent layer). Then you can use a gradient layer as background. It's an easy job in gimp and the result would be more professional than try to change / erase colours from existing captured pictures. It's just a suggestion...

[saint_m]

hi dear denzjos many thanks

your were  right - i only wanted to illustrate this - with a drawing - the drawing was only a shematic illustration

you were right - : what is aimed - is shown in the eariner post  - i have a network of dots.  ant that should be applied by the Gradiend.
thank you so much -
i am so happy to be here in the forum.

havce a great day.
greetings
saint -m

[rich2005]

[attachment=14363 Wrote:saint_m pid='46898' dateline='1775872860']...snip...

i (we all) have learned - that we can use wonderful color shemes - such as: LCH  - Lightness, Chroma, and Hue:
 https://www.prasannamestha.com/blog/scie...-gradients  

Remember, Gimp is a RGB editor, a color as RGB values has an equivalent using LCh and as a hexadecimal value. All the same result.

   

Quote:well - i want o apply this on a image: - see here a shematic view: 

colorize this from left to right - with  LCH
should i do this with - some kind of layers - where i have the gradient of the LCH stored in!?

Have you got any idea about making a gradient ? You can use Gimp for this. see: https://docs.gimp.org/3.0/en/gimp-tool-gradient.html
Another simple way for a few colours is an SVG gradient using the Hex value of the color. Text saved as something .svg and put in your gradients folder.

Code:

<defs>
<linearGradient id="01-svg-bespoke">
<stop offset="0%" stop-color="#f83adb" />
<stop offset="100%" stop-color="#1db3ff" />
</linearGradient>
</defs>

Then depends on your graphic,
white background - not always necessary to remove the background.
Desaturated to give grays.
Put the gradient under the graphic
Set the graphic layer to Pin light.