apply a certain gradient color-sheme to a image:

apply a certain gradient color-sheme to a image: - Printable Version

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+--- Thread: apply a certain gradient color-sheme to a image: (/Thread-apply-a-certain-gradient-color-sheme-to-a-image)

apply a certain gradient color-sheme to a image: - saint_m - 04-11-2026

good day dear experts, Smile

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-scala-how-to-define-the-colors-right-with-a-real-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/science-of-beautiful-color-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 Smile

RE: apply a certain gradient color-sheme to a image: - denzjos - 04-11-2026

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-concepts-gradients.html

I made a copy from the website you pointed at:

[attachment=14362]

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...

RE: apply a certain gradient color-sheme to a image: - saint_m - 04-11-2026

hi dear denzjos many thanks Smile

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. Heart

havce a great day.
greetings Smile

saint -m

RE: apply a certain gradient color-sheme to a image: - rich2005 - 04-11-2026

[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/science-of-beautiful-color-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.

[attachment=14363]

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.

[attachment=14364]

RE: apply a certain gradient color-sheme to a image: - saint_m - 04-11-2026

hey there - hello dear Rich2005

(on a sidenote: i have to leave the hous and catch the bus)

this is so awesome - this is so great - i am just overwhelmed.
many many thanks... Heart

i will answer more thouroghly - later the day.

greetings -saint_m. Smile

RE: apply a certain gradient color-sheme to a image: - saint_m - 06-24-2026

(04-11-2026, 01:14 PM)good day saint_m Wrote: hey there - hello dear Rich2005

(on a sidenote: i have to leave the hous and catch the bus)

this is so awesome - this is so great - i am just overwhelmed.
many many thanks...

i will answer more thouroghly - later the day.

greetings -saint_m.

ps - what about this attached image - can we apply this sheme here too!?

[attachment=14503]

[attachment=14504]

look forward to hear from you

greetings

RE: apply a certain gradient color-sheme to a image: - rich2005 - 06-25-2026

@saint-m
You must be a Gimp expert by now .

Your latest image, the scatter graph is on a transparent canvas. I might re-colour it this way.

(1) Lock the alpha channel - https://docs.gimp.org/3.0/en/gimp-dialogs-structure.html
(2) Colors -> Desaturate (tick the apply filter option)
(3) Apply a gradient

A one minute video of that https://sendvid.com/o9peccgu (no audio)
---
(remember to unlock the alpha when complete)

RE: apply a certain gradient color-sheme to a image: - saint_m - 06-25-2026

hi there - good day dear rich2005

your so awesome - many thanks for the reply. I love your explanations - and your in depth going mini-tutorials
i am pretty sure that they help lots (!) of others too .

many thanks -
keep up this awesome great work here.

RE: apply a certain gradient color-sheme to a image: - saint_m - 06-25-2026

Hi again

[btw unfortunatly there is no "grace-time" for editing the postings. sad thing but anyway]

... on re-reading i have seen how awesome all is: your video is just brilliant - thanks alot!!

btw: your videos and your contributions on the threads are just a great resource for anyone just starting out in all things GIMP.
I have learned so much through your answers so far!

With the videos and illustrations, you provide an in-depth and crystal clear walkthrough of all the steps that is necesarry for me - to "re-color" in the LCH-mode: In this video you share insights into the work of coloring and "re_coloring":

that said: I hope that many many others will benefit here too: your contributions ot the forum are absolutely promising and brilliant!!

keep up the great work. Smile