How do you increase an images resolution?

[Power Grown]

I need to increase the resolution of my company logo so when I print it on my product labels and instructions it will be more clear. The image is a small picture and I like to enlarge it for the instructions but it becomes fuzzy when I do. Can someone fix it for me and then tell me how to do it so I will know in the future?

[PixLab]

You cannot scale up a tiny image like this without problems, you need to re-do it completely...
Thus this will involve multiple layers and multiples Paths (Paths allow any scaling up to "infinity", without worrying about pixelisation, nor blurriness)

   

So as a pre-starter this is what I did
-- Use of an AI re-scaler, to 8 times its size > https://appimage.github.io/Upscayl/ for the roots in the flask.
-- Then searched for the font you used, it appears to be Arial paneuropean black (~$80), or Arial black which for non commercial use is free, thus I'll use it for demo in here as it is very similar.
-- pick all the colors on your logo > Plant: #4c9850, #372809 | Text: #ad4638, #963022 | Root's gradient: #a2cff8, #a2cff8

Now that I'm setup, I used the upsacaled image from the Artificial Intelligence in mode "Digital Art" 8x,
-- The path tool to select the plant, another path for the flask, and another path for the roots.

   

-- Path to selection for the plant to use the gradient from your colors on a new layer
-- Path to selection for the roots to use the gradient from your colors on a new layer, then copy/paste that selection on the original upscaled image and put above the roots' gradient I just did, and this very layer a little bit of color to alpha to merge both gradients

   

Then I just stroke the path of the flask (Edit > Stroke Path... > a window opens, select: Stroke Line/Solid Color: Width>30 pixels | Line style > cap style: Butt, joint style: Round)

   

Then the text.
Arial black at 1100, a<->b = -35 (minus 35), with the clearer bordeaux alike color, then alpha to selection, shrink selection by 5 pixels, save to path, use that path to stroke on a new layer with darker bordeaux alike color (setting are slightly different than above, check the screenshot below)

   

[Power Grown]

Absolutely stunning, thank you so much... I would NEVER have been able to do this. Not with out learning a completely new skill, anyway. I feel like I should pay you! You sir/ma'am are a gimp master.

[denzjos]

That's what I did (with using gimp and scaling in mind)  :
Searched the font to easely scale with the text tool : Arial MT Black
Make selections from plant, ground and flask
Use blending on ground and plant
Made a background:
- make a path grid (from guides)
- transform the grid with 'fractalise path' plugin
- distort the grid with the 'handle transform' tool
- stroke path with the brush '2.Block 03' (black / white), Dynamics Random)
- blur the result
- change the colour with 'curves'
The roots need some correction, see post from Pixlab)

  power grow.xcf (Size: 1.1 MB / Downloads: 154)

[PixLab]

(02-26-2023, 06:27 PM)Power Grown Wrote: Absolutely stunning, thank you so much... I would NEVER have been able to do this. Not with out learning a completely new skill, anyway. I feel like I should pay you! You sir/ma'am are a gimp master.

Thank you for the kind words.
I did edit my previous post to add one more screenshot and limited by the number of image I did forget to transfer the final result to another post.
Fixing it now, click on the image below to get to the big size (If you want the PNG without the white background, just drop a post, I will find a free host for it as it is a very large file )